Abstract
Studies with molecular markers are currently more common for all groups of living organisms. Molecular techniques used in Platyhelminthes parasites of fishes do not merely reveal complex life cycles, but are important for species distinction and the elucidation of the phylogenetic hypothesis. Current research verified which molecular markers were mainly used phylogenetic studies on Platyhelminthes parasites of fish so that subsidies for further phylogenetic studies in Icthyoparasitology could be provided. Data base of CAPES Journals platform was employed for bibliometric analysis comprising the keywords “fish” and “phylogeny” associated with “Cestoda”, “Digenea” or “Monogenea”. Information retrieved was quantified and tabulated. Most studies were on Monogenea (43%), followed by Digenea (37%) and Cestoda (18%). Ribosomal molecular markers were the most used in the phylogenetic studies for fish parasites. Due to the advance of molecular biology techniques and of bioinformatics, with more robust phylogenetic analysis, the use of these techniques in other areas such as Ichytioparasitology is on the increase. In fact, molecular phylogenetics and morphological structures analysis have efficiently contributed towards the understanding of phylogenetic relationships among the groups.
Highlights
In the 1960s, Willi Hennig introduced the phylogenetic system or the reconstruction of a common evolution offspring of a group of living organisms (Bueno-Silva, 2012)
Nuclear markers were the most used in phylogenetic studies on these parasites, whereas mitochondrial markers were only scantly employed in phylogenetic studies with fish flatworm parasites (Figure 1B)
The most employed molecular markers for phylogenetic purposes were related to ribosomal nuclear genes (Figure 3)
Summary
In the 1960s, Willi Hennig introduced the phylogenetic system or the reconstruction of a common evolution offspring of a group of living organisms (Bueno-Silva, 2012). The variations of characteristics with a genetic origin are investigated within a certain species groups. Biological Sciences homology are formulated, compared and contrasted with congruency tests to verify kinship (Nelson & Platnick, 1981). Homologous structures comparing different species should be understood to formulate the phylogenetic hypotheses. According to Amorim (2002), structure is any section of a living organism or a ny genotypic expression.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
