XVI European Research Articles

Implication of allele determination of nuclear loci for phylogenetic analysis of polypoid Cobitis

Event Abstract Back to Event Implication of allele determination of nuclear loci for phylogenetic analysis of polypoid Cobitis Kenji Saitoh1* 1 Tohoku National Fisheries Research Institute, Japan I present here how important information is hidden by phylogenetic comparison of nuclear DNAs sequenced directly with PCR in Cobitis loaches with frequent hybridization and polyploidy. Instead, many of the recent phylogenetic analyses in fish rely on mtDNA sequences because of sequencing efficiency and least risks of paralogous comparison. Maternal inheritance of mtDNAs, however, makes it unable to detect hybridization and polyploidy directly but hybridizing direction. Skewed mtDNA trees will also come out in such cases. Hence, needs for nuclear DNA comparison pushed to develop PCR primers for single copy nuclear genes. Many of PCR-based nuclear DNA sequencing for fish phylogeny nowadays employ direct sequencing results containing wobbled sequences at heterozygous sites. Direct sequencing of nuclear DNAs, however, sacrifices the merit of detecting hybrid-based events such as mitochondrial gene introgression, genome mosaicism, etc. I present an example from diploid-tetraploid complexes of Japanese loaches. Nuclear DNA sequencing with allele determination revealed parentage of tetraploids and unexpected genome mosaicism. Mitochondrial sequences determined their maternity. If we were doing only direct sequencing without determining nuclear alleles, those important information would be hidden in frippery good phylogenetic trees, and we thus might give misleading discussions. Keywords: Direct sequencing, genome mosaicism, hybridization, Introgression, mtDNA Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: EVOLUTION AND ECOLOGY OF FISH WITH ASEXUAL REPRODUCTION, HYBRID COMPLEXES AND POLYPLOIDY, WITH SPECIAL FOCUS ON LOACHES (COBITOIDEI) Citation: Saitoh K (2019). Implication of allele determination of nuclear loci for phylogenetic analysis of polypoid Cobitis. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00028 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 29 May 2019; Published Online: 14 Aug 2019. * Correspondence: Mx. Kenji Saitoh, Tohoku National Fisheries Research Institute, Shiogama, Japan, ksaitoh@affrc.go.jp Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Kenji Saitoh Google Kenji Saitoh Google Scholar Kenji Saitoh PubMed Kenji Saitoh Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Molecular basis of adaptation to hypoxia in Barombi Mbo crater lake cichlids

Event Abstract Back to Event Molecular basis of adaptation to hypoxia in Barombi Mbo crater lake cichlids Dmytro Omelchenko1*, Pavel Talacko1, Adrian Indermaur2, Walter Salzburger2 and Zuzana Musilova1 1 Charles University, Czechia 2 University of Basel, Switzerland Deep water zone represents an extreme environment where organisms have to cope with low dissolved oxygen concentrations, low-intensity light with the narrower color spectrum and high hydrostatic pressure. Such conditions create selective pressure and shape the evolution of living organisms in deep waters. They establish various adaptations to exploit energy sources which are unavailable for shallow-water inhabitants. The general challenge of adaptation research is to identify the link between the species ecology, environment and the molecular adaptation in different species. Here we study endemic cichlid fishes from the crater lake Barombi Mbo in Cameroon, West Africa. We compare shallow-water and deep-water cichlid species from monophyletic species flock focusing on gene sequence, expression levels and proteome abundance of hemoglobins and other candidate proteins (myoglobin, coagulation factors) that might be involved in establishment of adaptation to life in the depth. We performed genome assembly of 4 Barombi Mbo cichlid species and obtained information about exact synteny of hemoglobin gene clusters. We inferred CDS structure of hemoglobin genes with subsequent phylogenetic analysis. In addition, we inspected the hemoglobin clusters in the closely related species, Nile tilapia, and identified 17 Hb-alpha and 15 Hb-beta genes. According to our knowledge Nile Tilapia has the highest number of hemoglobin genes among Vertebrates. Furthermore, we performed RNA sequencing of the gill tissue and calculated gene expression for hemoglobin subunits. We estimated that from multiple hemoglobin genes (18 in Barombi Mbo cichlids) only four are expressed in adult fish. We observed that those are two pairs of alpha and beta subunits which are located in the close synteny. We further estimated that expression in deep-water species is slightly higher and favored towards one pair of the hemoglobin genes while in shallow-water species expression is shifted towards another pair of hemoglobin subunit genes. This might be connected to our observation that allele of the genes (Hb-beta 11 and Hb-alpha 12) that have higher expression in two deep-water species possessing 4 amino acid substitutions (3 in Hb-beta 11 and 1 in Hb-alpha 12 respectively). Moreover, we performed targeted and non-targeted HPLC-MS/MS analysis of blood proteome and identified 23 proteins that are differentially abundant in fishes coming from different depth horizons. We demonstrate that adaptation to hypoxia in Barombi Mbo crater lake cichlids is likely reflected on several levels including structural changes within coding region of hemoglobin genes and their expression. In addition, we provide evidence of engagement of various proteins in hypoxia adaptation. Keywords: Cichlids, Hemoglobin, hypoxia, Proteome, adaptation, Differential gene expression, crater lake Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: GENETICS, GENOMICS AND PHYSIOLOGY Citation: Omelchenko D, Talacko P, Indermaur A, Salzburger W and Musilova Z (2019). Molecular basis of adaptation to hypoxia in Barombi Mbo crater lake cichlids. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00062 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 21 Jul 2019; Published Online: 14 Aug 2019. * Correspondence: Mr. Dmytro Omelchenko, Charles University, Prague, Czechia, omeldima@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Dmytro Omelchenko Pavel Talacko Adrian Indermaur Walter Salzburger Zuzana Musilova Google Dmytro Omelchenko Pavel Talacko Adrian Indermaur Walter Salzburger Zuzana Musilova Google Scholar Dmytro Omelchenko Pavel Talacko Adrian Indermaur Walter Salzburger Zuzana Musilova PubMed Dmytro Omelchenko Pavel Talacko Adrian Indermaur Walter Salzburger Zuzana Musilova Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Frequencies and cytogenetic mechanisms of gynogenetic reproduction and sterility in artificially produced Cobitis F1 hybrids from parental species with different degree of phylogenetic relatedness

Frequencies and cytogenetic mechanisms of gynogenetic reproduction and sterility in artificially produced Cobitis F1 hybrids from parental species with different degree of phylogenetic relatedness

Cryptic diversity within the Schistura robertsi species complex (Nemacheilidae).

Event Abstract Back to Event Cryptic diversity within the Schistura robertsi species complex (Nemacheilidae). Tomáš Dvořák1*, Jörg Bohlen1 and Vendula Šlechtová1 1 Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics (ASCR), Czechia The Schistura robertsi species complex is a group of freshwater fish inhabiting streams and rivers in southeast Myanmar and western and southern Thailand. The complex is believed to include five described and one undescribed species, but monophyly, outline and systematics of the complex have never been studies explicitly. The present study aims to resolve the number of species within the Schistura robertsi group as well as their distribution areas and their phylogenetic relations. We analysed mitochondrial and nuclear sequence data of 86 specimens from 47 localities and 18 morphologic characters of about 200 specimens. The phylogenetic analyses revealed the S. robertsi complex to be monophyletic and to be composed of ten major lineages. Six of them correspond to the known described or undescribed species, but another four reveal the existence of a cryptic diversity within the group. All genetic lineages are statistically highly supported, have distinct distribution areas and all are morphologically diagnosable, suggesting that they represent distinct species. Several cases of co-occurrence without sign of hybridisation exist. Acknowledgements The study got financial support from grants 206/08/0637 and 19-18453S of the Grant Agency of the Czech Republic. Keywords: molecular phylogeny, systematics, Biodiversity, freswater fish, South East Asia, Loach, morphology Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Poster Topic: TAXONOMY, PHYLOGENY AND ZOOGEOGRAPHY Citation: Dvořák T, Bohlen J and Šlechtová V (2019). Cryptic diversity within the Schistura robertsi species complex (Nemacheilidae).. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00126 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 30 May 2019; Published Online: 14 Aug 2019. * Correspondence: Mx. Tomáš Dvořák, Laboratory of Fish Genetics, Institute of Animal Physiology and Genetics (ASCR), Liběchov, Czechia, dvorak@iapg.cas.cz Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Tomáš Dvořák Jörg Bohlen Vendula Šlechtová Google Tomáš Dvořák Jörg Bohlen Vendula Šlechtová Google Scholar Tomáš Dvořák Jörg Bohlen Vendula Šlechtová PubMed Tomáš Dvořák Jörg Bohlen Vendula Šlechtová Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

A taxonomic revision of the whitefish of Lakes Brienz and Thun, Switzerland, with description of three new species.

Event Abstract Back to Event A taxonomic revision of the whitefish of Lakes Brienz and Thun, Switzerland, with description of three new species. Oliver M. Selz1, 2*, Ole Seehausen1, 2, Carmela J. Dönz1, 2 and Pascal Vonlanthen1, 3 1 Centre of Ecology, Evolution and Biogeochemistry, Swiss Federal Institute of Aquatic Science and Technology, Switzerland 2 University of Bern, Switzerland 3 Aquabios GmbH, Switzerland The European whitefish (Coregonus spp.) provide prime examples of postglacial adaptive radiations with up to six species occurring in a single lake of the prealpine region. Despite this enigmatic species richness, approximately one-third of the species diversity in Swiss Lakes has not yet been taxonomically resolved. Here we review and revise the alpha taxonomy of the endemic whitefish of Lakes Brienz and Thun, Switzerland. We evaluate the status of six known species, of which three have been previously described. With a combination of species-targeted and habitat-randomised fishing surveys during or outside of the spawning season we are able to reveal with an integrative taxonomic approach of combining genetic assignments with morphological and meristic traits and multivariate statistical methods six whitefish species. Four species occur in both lakes Thun and Brienz and two species, a profundal specialist and a species of partial allochthonous origin, are unique to Lake Thun. Despite many past and present anthropogenic pressures, Lakes Thun and Brienz today harbour the most speciose whitefish radiation of the prealpine region. We further show that two of these species are present in Lake Biel, which has been artificially connected downstream of the lakes Thun and Brienz through the Aare river approx. 150 years ago. This work highlights that species delineation and description in such rich radiations requires an integrative approach to taxonomy, combining morphology with genetics and ecology and large contemporary and historical specimen collections. Such work is also much needed for conservation-minded fisheries management because human-made changes to the connectivity of water bodies as well as deliberate introductions, are increasing the distribution ranges of species and cause previously isolated biota to mix. Keywords: Coregonus, Salmonidae, Whitefish, adaptive radiation, ecological speciation, Integrative taxonomy Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: TAXONOMY, PHYLOGENY AND ZOOGEOGRAPHY Citation: Selz OM, Seehausen O, Dönz CJ and Vonlanthen P (2019). A taxonomic revision of the whitefish of Lakes Brienz and Thun, Switzerland, with description of three new species.. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00112 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 05 Jun 2019; Published Online: 14 Aug 2019. * Correspondence: Dr. Oliver M Selz, Centre of Ecology, Evolution and Biogeochemistry, Swiss Federal Institute of Aquatic Science and Technology, Kastanienbaum, 6047, Switzerland, oliver.selz@eawag.ch Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Oliver M Selz Ole Seehausen Carmela J Dönz Pascal Vonlanthen Google Oliver M Selz Ole Seehausen Carmela J Dönz Pascal Vonlanthen Google Scholar Oliver M Selz Ole Seehausen Carmela J Dönz Pascal Vonlanthen PubMed Oliver M Selz Ole Seehausen Carmela J Dönz Pascal Vonlanthen Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Genetic data reveal unexpected relationships among European freshwater species of the Gobius-lineage

Event Abstract Back to Event Genetic data reveal unexpected relationships among European freshwater species of the Gobius-lineage Tereza Slámová1*, Radek Šanda2 and Jasna Vukić1 1 Faculty of Science, Charles University, Department of Ecology, Czechia 2 National Museum (Czechia), Czechia Gobiidae is one of the largest families of teleost fishes with nearly 2000 currently recognized species. Gobies have a worldwide distribution with exception of Arctic and Antarctic areas. In Europe, three independent evolutionary lineages occur: – Gobius -, Pomatoschistus - and Aphia - lineage. Some species of this primarily marine fishes adapted to the freshwaters. They belong to the Gobius – and Pomatoschistus – lineages. The freshwater species from the Gobius – lineage are representatives of the monophyletic clade of benthophilines (the species flock of gobies from the Ponto-Caspian region) and the genus Padogobius from the Adriatic – Tyrrhenian area. There are molecular works which suggest that the genus Padogobius might not be monophyletic. The aim of this work was to test the monophyly of the genus Padogobius and reveal its relationships with the rest of the species of the Gobius – lineage. For this purpose, 2 mitochondrial and 2 nuclear markers were analyzed. The results of mitochondrial and nuclear markers are consistent and confirm that the genus Padogobius is not monophyletic. Padogobius nigricans s belongs to the genus Neogobius and Padogobius bonelii remains the only species of this genus. However, its relationships with the other species of the Gobius – lineage remain unresolved. Padogobius nigricans belongs to the group that has a Ponto – Caspian distribution, although it inhabits the Tyrrhenian area. Its closest relatives inhabit the fresh and brackish waters around the Black Sea. According to the results based on cytochrome b, it seems that Neogobius nigricans dispersed to Apennine peninsula after the radiation of the genus in the Ponto – Caspian region. Molecular dating suggests that the dispersion might have happened at the beginning of Pliocene, 5 – 4 million years ago. Acknowledgements GAUK n. 1192217 Keywords: Padogobius, adaptation to freshwaters, phylogenetic relationships, Benthophilinae, Phylogeography Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Poster Topic: TAXONOMY, PHYLOGENY AND ZOOGEOGRAPHY Citation: Slámová T, Šanda R and Vukić J (2019). Genetic data reveal unexpected relationships among European freshwater species of the Gobius-lineage. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00156 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 27 May 2019; Published Online: 14 Aug 2019. * Correspondence: Mrs. Tereza Slámová, Faculty of Science, Charles University, Department of Ecology, Prague, Prague, 128 43, Czechia, slamovt@natur.cuni.cz Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Tereza Slámová Radek Šanda Jasna Vukić Google Tereza Slámová Radek Šanda Jasna Vukić Google Scholar Tereza Slámová Radek Šanda Jasna Vukić PubMed Tereza Slámová Radek Šanda Jasna Vukić Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Implications of management on immunogenetic variation in the European grayling (Thymallus thymallus)

Implications of management on immunogenetic variation in the European grayling (Thymallus thymallus)

Unravelling the population structure of Trachurus picturatus across the NE Atlantic using otolith fingerprinting analyses

Unravelling the population structure of Trachurus picturatus across the NE Atlantic using otolith fingerprinting analyses

Multiple Sex Chromosome System X1X2Y in African Killifish Genera Nothobranchius and Fundulosoma (Cyprinodontiformes)

Multiple Sex Chromosome System X1X2Y in African Killifish Genera Nothobranchius and Fundulosoma (Cyprinodontiformes)

Do Freshwater Hatchetfishes (Characiformes; Gasteropelecidae) hear with the top of their heads?

Event Abstract Back to Event Do Freshwater Hatchetfishes (Characiformes; Gasteropelecidae) hear with the top of their heads? Kevin W. Conway1* and Cristiano R. Moreira2 1 Texas A&M University, United States 2 Museu Nacional, Universidade Federal do Rio de Janeiro, Brazil With a distinctly prominent coracoid, the members of the Gasteropelecidae (Carnegiella, Gasteropelecus, and Thorachocharax) are among the most unusual fishes within the order Characiformes. Although these fishes are well known for their ability to detect and locate potential prey items on the water surface at dusk, the morphological modifications that facilitate this behavior remain unknown. Here, we describe several potentially unique modifications of the surface of the head and laterosensory canals shared by the three genera of freshwater hatchetfishes that may be involved in prey detection at the water surface. The top of the head is covered by multiple rows of superficial neuromasts running from just posterior to the upper lip to the supraoccipital. The frontal and parietal have two longitudinal, parallel crests of bone that create two pairs of elongate troughs (one lateral and one medial) on the dorsal surface of the head. Each of these troughs is roofed by a thin layer of skin and appear to be derived from the supraorbital canal of the laterosensory system. The medial trough extends along the entire frontal and a portion of the parietal, connecting to the exterior only through the nasal canal. The shorter lateral trough is located dorsal to the orbit, and connected to the medial trough by a foramen piercing the longitudinal crest separating them. Except for the short nasal canal, each trough is isolated from the remaining components of the laterosensory canal system. Associated with each of these bony troughs are large banana-shaped neuromasts that are arranged perpendicular to each other (including two in the median chamber and one in the lateral chamber, as well as one in the foramen between the two). This morphological complex may serve as tympana, enabling gasteroplecids to locate precisely prey on water surface. Keywords: Mechanosensory system, Lateral line canal, Neuromast, SEM, CT Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: MORPHOLOGY, ONTOGENY AND PALAEONTOLOGY Citation: Conway KW and Moreira CR (2019). Do Freshwater Hatchetfishes (Characiformes; Gasteropelecidae) hear with the top of their heads?. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00079 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 19 Jun 2019; Published Online: 14 Aug 2019. * Correspondence: Dr. Kevin W Conway, Texas A&M University, College Station, United States, conwaykw@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Kevin W Conway Cristiano R Moreira Google Kevin W Conway Cristiano R Moreira Google Scholar Kevin W Conway Cristiano R Moreira PubMed Kevin W Conway Cristiano R Moreira Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Do upwellings produce specific morphologic and chemical signatures in Sardinella brasiliensis otoliths?

Do upwellings produce specific morphologic and chemical signatures in Sardinella brasiliensis otoliths?

Male Territory Swamping in a Lek-like Mating System Alters Courtship Success in a Fish Spawning Aggregation

Event Abstract Back to Event Male Territory Swamping in a Lek-like Mating System Alters Courtship Success in a Fish Spawning Aggregation Terry J. Donaldson1* 1 University of Guam Marine Laboratory, United States Many reef fish species that form spawning aggregations utilize a lek-like mating system in which males establish temporary courtship territories that they defend against rival males while attracting females to spawn. At a resident spawning aggregation site located at Finger Reef, Guam, male Cheilinus trilobatus (Labridae) holding territories along the outer edge of the site experience significantly greater courtship success compared with males holding territories within the site’s interior. Males holding edge territories are always successful in defending these territories from intruding males, even when they are engaged in courtship. Recently, however, increases in the number of males present at the spawning aggregation site have resulted in an increase in the number of territory intrusions during courtship periods. These intrusions “swamp” a normally successful male’s territory and make defense difficult. Multiple intruders not chased away or simply returning after being chased then court and spawn with females that arrive within the territory. Costs to the territory holder include lost courtship opportunities because of territorial interactions that interrupt courtship and reduced reproductive success because intruding males court successfully with females that visit the male’s territory and deprive him of the opportunity to do so. Acknowledgements None References None Keywords: Courtship, fish, Labridae, Reproduction, wrasse Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: ECOLOGY AND LIFE CYCLES Citation: Donaldson TJ (2019). Male Territory Swamping in a Lek-like Mating System Alters Courtship Success in a Fish Spawning Aggregation. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00007 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 26 Jun 2019; Published Online: 14 Aug 2019. * Correspondence: Prof. Terry J Donaldson, University of Guam Marine Laboratory, Guam, United States, tdonaldson@triton.uog.edu Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Terry J Donaldson Google Terry J Donaldson Google Scholar Terry J Donaldson PubMed Terry J Donaldson Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

The benefits of the third dimension – What can we learn from the z-axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)?

The benefits of the third dimension – What can we learn from the z-axis in 3D geometric morphometrics based on sailfin silversides (Telmatherinidae)?

Evolution in the Dinarids: phylogeography, diversity and evolutionary history of the endemic genus Delminichthys (Actinopteri; Leuciscidae)

Event Abstract Back to Event Evolution in the Dinarids: phylogeography, diversity and evolutionary history of the endemic genus Delminichthys (Actinopteri; Leuciscidae) Ivana Buj1*, Marko Ćaleta2, Zoran Marčić1, Radek Sanda3, Davor Zanella1, Sven Horvatić1 and Perica Musafić1 1 Faculty of Science, University of Zagreb, Croatia 2 Faculty of Teacher Education, University of Zagreb, Croatia 3 National Museum (Czechia), Czechia The origin of exceptionally rich fish communities harbored within the freshwater systems of southern Europe is usually explained by allopatric speciation due to a long isolation of water basins. On the other hand, hybridization events are generally not considered to play an important role in the evolutionary history, although they have been recorded in several fish species. Contrary to most species within the Leuciscidae family, the genus Delminichthys inhabits a geographically restricted area (middle and southern Dinarides) and consists of only four endemic species. This study analysed the population genetic structure and demographic history of each Delminichthys species as a contribution to the understanding of the evolutionary peculiarities in Dinaric water systems. The obtained results revealed pronounced mito-nuclear discordance, likely the result of incomplete lineage sorting, as well as extensive nuclear introgression observed in the Ombla River population in southernmost Croatia. In addition to allopatric speciation, ancient hybridization appears to have played an important role in the evolutionary history of this genus. The origin of the genus Delminichthys can be dated back to the Oligocene/Miocene boundary, to a period of significant tectonic activity in the Mediterranean region, and its ancestor likely inhabited the region of the central Dinarides. Intrageneric divergences occurred in the lower Miocene and Pliocene. Similarly, as previously proposed for D. adspersus, traces of underground migrations were found among D. ghetaldii populations, implying adaptations to underground life that are characteristic for the genus. All Delminichthys species express high levels of genetic diversity, likely as a consequence of their old origin. The population size of D. adspersus is currently decreasing, while the remaining three species appear stable. Keywords: Dinaric freshwater systems, evolutionary history, Genetic composition, genus Delminichthys, nuclear introgression, subterranean migrations Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: GENETICS, GENOMICS AND PHYSIOLOGY Citation: Buj I, Ćaleta M, Marčić Z, Sanda R, Zanella D, Horvatić S and Musafić P (2019). Evolution in the Dinarids: phylogeography, diversity and evolutionary history of the endemic genus Delminichthys (Actinopteri; Leuciscidae). Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00063 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 12 Jul 2019; Published Online: 14 Aug 2019. * Correspondence: Mx. Ivana Buj, Faculty of Science, University of Zagreb, Zagreb, Zagreb, 10000, Croatia, ivaradic@biol.pmf.hr Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Ivana Buj Marko Ćaleta Zoran Marčić Radek Sanda Davor Zanella Sven Horvatić Perica Musafić Google Ivana Buj Marko Ćaleta Zoran Marčić Radek Sanda Davor Zanella Sven Horvatić Perica Musafić Google Scholar Ivana Buj Marko Ćaleta Zoran Marčić Radek Sanda Davor Zanella Sven Horvatić Perica Musafić PubMed Ivana Buj Marko Ćaleta Zoran Marčić Radek Sanda Davor Zanella Sven Horvatić Perica Musafić Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.

Loaches of Cobitis - fish with high potential for hybridization and subsequent polyploidization. How to determine the “potential for hybridization"? Does it exist?

Loaches of Cobitis - fish with high potential for hybridization and subsequent polyploidization. How to determine the “potential for hybridization"? Does it exist?

Hybridization of Caucasian barbels of the genus Barbus s. str.

Hybridization of Caucasian barbels of the genus Barbus s. str.

Phylogeography of Asian sockeye salmon (Oncorhynchus nerka) based on the analysis of mtDNA D-loop polymorphism

Phylogeography of Asian sockeye salmon (Oncorhynchus nerka) based on the analysis of mtDNA D-loop polymorphism

Evolution of acoustic communication in European gobies (Gobius lineage) based on molecular markers

Evolution of acoustic communication in European gobies (Gobius lineage) based on molecular markers

Genetic variability of the mtDNA control region and the intron of the nuclear gene tumor necrosis factor alpha in graylings, Thymallus

Genetic variability of the mtDNA control region and the intron of the nuclear gene tumor necrosis factor alpha in graylings, Thymallus

Mustura (Teleostei: Nemacheilidae) of Northeast India: A diversity study based on morphological characters and Scanning Electron micrographs

Event Abstract Back to Event Mustura (Teleostei: Nemacheilidae) of Northeast India: A diversity study based on morphological characters and Scanning Electron micrographs Rameshori Yumnam1, 2*, Chinglemba Yengkhom1 and Vishwanath Waikhom1 1 Manipur University, India 2 Department of Life Sciences, Manipur University, India Northeast India, having a greatly varying topography with diverse river systems, comes under the Eastern Himalaya Freshwater Biodiversity Hotspot. The region is a home to many species of Nemacheiline fishes. Of the Nemacheiline fishes, Mustura Kottelat is a newly erected genus. There are eight species of Mustura occurring in northeast India which were placed earlier in the genus Physoschistura. Morphological characterizations of Mustura were studied employing classical taxonomic approach and scanning electron microscopy (SEM). A new species Mustura sp. nov. of the genus Mustura is expected in the present study. The morphological characters manifested in the form of oromandibular structures, pectoral fins, free posterior chamber and the suborbital flaps of M. chindwinensis, M. dikrongensis, M. tigrina, M. tuivaiensis and M. sp. nov. have been studied. The SEM study on the different species of Mustura reveals the presence of unculi on both the jaws and taste buds on the lips and barbels. The generic status of M. chindwinensis, M. dikrongensis, M. tigrina and M. tuivaiensis are discussed in detail and ascertained. However, since the genus Mustura is at its infancy, we conclude that further studies on the Nemacheilid Mustura of the region are necessary. Keywords: diversity, Nemacheiline, Mustura, morphology, SEM, northeast India Conference: XVI European Congress of Ichthyology, Lausanne, Switzerland, 2 Sep - 6 Sep, 2019. Presentation Type: Oral Topic: TAXONOMY, PHYLOGENY AND ZOOGEOGRAPHY Citation: Yumnam R, Yengkhom C and Waikhom V (2019). Mustura (Teleostei: Nemacheilidae) of Northeast India: A diversity study based on morphological characters and Scanning Electron micrographs. Front. Mar. Sci. Conference Abstract: XVI European Congress of Ichthyology. doi: 10.3389/conf.fmars.2019.07.00103 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 14 May 2019; Published Online: 14 Aug 2019. * Correspondence: Dr. Rameshori Yumnam, Manipur University, Imphal, India, rameshori.yumnam@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Rameshori Yumnam Chinglemba Yengkhom Vishwanath Waikhom Google Rameshori Yumnam Chinglemba Yengkhom Vishwanath Waikhom Google Scholar Rameshori Yumnam Chinglemba Yengkhom Vishwanath Waikhom PubMed Rameshori Yumnam Chinglemba Yengkhom Vishwanath Waikhom Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.