Lobster Research Articles

Ectrodactyly or lobster claw feet: our surgical experience

Introduction: Ectrodactyly, often the center of attraction due to the mystifying appearance, is a challenging surgical entity as more often the affected children seek cosmetic improvement and also want their feet to fit into normal footwear. Aims and objectives: Not much has been written in the literature of the surgical treatment of this rare entity. This article has been written to address the surgical options and treatment of this rare deformity. Results: We report a case series of five affected children treated in our institute over a period of 4 years. The cases were followed up for a period of 1 year, and there were no recurrence. Conclusion: Surgical descriptions for correction of this rare entity are few and this article aims to address this lacuna, helping in proper correction of this deformity.

Defunct And Part Attribute Of Fireplace Fed Lobster Brunch As Reinstatement To Fishmeal

Lobster brunch was hand-picked to interchange fish brunch as main macromolecule supply in broiler diet. Crabs were procured, dried over fireplace, and ground into brunch that was fed to broilers. A complete of two hundred neutered stale fireplace were fed five levels (0%, 25%, 50%, seventy fifth and 100%) of lobster brunch as reinstatement for fish brunch to guage body and part parameters at fifty six days mature. Twenty birds were used per replicate; and a pair of replicates per treatment in an exceedingly fully irregular style (CRD). Feed and contemporary drinkable were provided ad libitum; and correct litter management, sanitation and drugs were adopted. Average weight at fifty six days weren't considerably totally different (p>0.05) being between 2266g – 2337g. Similarly, there have been no vital variations (p>0.05) in weight of dressed body, thigh, breast, head, shank and neck that would be attributed to treatment; however weight of heart from fireplace fed lobster brunch weighed considerably (p<0.5) but those fed fish brunch solely. Moreover, liver from fireplace fed fish brunch alone were considerably heavier (p<0.05) than those fed lobster meal; however pouch of fireplace fed lobster brunch were heavier (p<0.05) than those of fireplace fed fishmeal.

Data from: SNPs reveal a genetic cline across the northeast Atlantic and enable powerful population assignment in the European lobster

Data from: SNPs reveal a genetic cline across the northeast Atlantic and enable powerful population assignment in the European lobster

Mercy in Chatham, The woman and the lobster

Mercy in Chatham, The woman and the lobster

Space and Power in The Lobster - A Comparison with Goffman’s Asylums

Space and Power in The Lobster - A Comparison with Goffman’s Asylums

PHYSIOLOGICAL DEVELOPMENT OF HELICONIAS DERIVED FROM IN VITRO CULTURE OF ZYGOTIC EMBRYOS AND CONVENTIONAL PROPAGATION

The aim of the current study is to compare the physiological development of Heliconia bihai (L.) L. Lobster Claw Two plants derived from in vitro culture of zygotic embryos and conventional propagation. Heliconias obtained from rhizomes and from in vitro multiplication were evaluated every 30 days for ten months under greenhouse conditions. The experimental design was completely randomized (CRD), with ten repetitions, and the 2x10 factorial arrangement consisted of two plant multiplication methods and ten evaluations performed at different times. The analyzed biometric parameters were plant height, number of leaves, number of tillers, leaf area, and color intensity in the bracts. The plants derived from in vitro culture showed significant differences in the development of the evaluated physiological parameters in comparison to the plants derived from rhizomes, and they also showed early flowering. Although the in vitro culture plants derived from zygotic embryos, no morphological changes were found in the vegetative and reproductive parts (inflorescence) of the plants or in the colorimetry. It shows that the in vitro culture of zygotic embryos may be used as a technique to produce seedlings on a large-scale, thus allowing the floriculture sector to grow in the region and all over the country.

The relationship between the vertical distribution of spiny lobster phyllosoma larvae (Crustacea: Palinuridae) and isolume depths generated by a computer model

Diel vertical migration (DVM) of spiny lobster (Panulirus spp.) phyllosoma larvae may be a key component in the biological-physical coupling which affects their transport and survival in the Florida Keys. Light is often invoked as the most important factor to influence DVM (AngeI 1985). In this study, we describe the diel changes in the vertical distribution of Panulirus spp. phyllosomata. We then use a computer model to hindcast irradiance in the water column associated with the vertical distribution patterns, and explore the possible correlation between them. The ability to predict the vertical distribution of phyllosomata with a light model will be useful in quantitative sampling and in the modeling of larval transport and recruitment mechanisms.

Bycatch of the squat lobster Munida gregaria in bottom trawl fisheries in San Jorge Gulf, Argentina

Varias especies de langostillas son reconocidas como recursos pesqueros potenciales en todo el mundo. La langostilla Munida gregaria es un componente importante de las capturas incidentales en las pesquerias de arrastre en la Patagonia Argentina. Se evaluo la frecuencia de ocurrencia (FO), abundancia relativa (AR) y destino de las capturas incidentales de M. gregaria en: a) la flota congeladora tangonera (63579 lances), b) la flota fresquera de altura (5608) y c) la flota costera (584). Las mayores FO y AR fueron registradas en la flota costera. Sin embargo, dada la magnitud de la flota congeladora tangonera, el esfuerzo de pesca sugiere que las mayores capturas incidentales en terminos de biomasa son producidas por esta flota. Se observo un incremento significativo en FO y AR en los lances de la flota congeladora tangonera en los ultimos anos, siendo este mas marcado en aguas nacionales y provinciales de la provincia de Santa Cruz. La FO y AR de la especie en los lances de la flota fresquera de altura fueron bajas durante todo el periodo analizado. Los resultados confirman que la langostilla es una especie muy abundante y un recurso desaprovechado hasta el presente, y que puede representar una alternativa para la flota costera en el Golfo San Jorge.

Nutritional condition and gonad development of juvenile and subadult California spiny lobster Panulirus interruptus in two habitats

Se analizo la condicion nutricional y el desarrollo gonadico de juveniles y sub-adultos de langosta roja (Panulirus interruptus) en 2 sitios de la Peninsula de Baja California cercanos geograficamente, pero con condiciones ambientales contrastantes, el mas norteno con condiciones subtropicales y el sureno con condiciones semitempladas. Se estimaron el indice hepatosomatico y el indice refractivo de la sangre, y se cuantificaron las proteinas, lipidos y carbohidratos del hepatopancreas en 62 langostas. Adicionalmente, se comparo el desarrollo gonadico de los organismos en ambos sitios. El indice hepatosomatico y la cuantificacion de lipidos mostraron que la condicion nutricional de los organismos fue diferente en cada sitio. Se observo que los indices de condicion nutricional son afectados por el desarrollo gonadico debido al uso de reservas para la maduracion de las gonadas. La condicion nutricional y el desarrollo gonadico estan fuertemente relacionados con las condiciones ambientales donde se encuentran las langostas, lo cual es informacion util para el manejo de la pesqueria de P. interruptus.

Coupling salinity reduction to aquatic animal well-being and ecosystem representativeness at the Biodôme de Montréal

This paper presents a case study of a locally adapted sustainable strategy of salinity reduction applied to the Saint Lawrence maritime ecosystem at the Biodome de Montreal. In conformity with the standards of the CAZA (Canadian Aquarium and Zoos Association), this procedure was implemented to reconcile animal well-being, ecosystem representativeness and control of costs under the operational environment of a cold seawater recirculation system featuring the Golfe du Saint Laurent Ecosystem (GSLE) and its associated live collection. A simple methodology to carry out safe salinity reduction procedures of artificial seawater environments (from 28 to 24 Practical Salinity Units) is proposed and detailed. Adapted salinity challenge tests at 14, 21 and 24 were conducted beforehand and simple adapted indicators were used on a selection of key species (thorny skate: Raja radiate ; little skate: R. erinacea ; barndoor skate: R. laevis ; Atlantic cod: Gadus morhua ; green urchins: Strongylocentrolus droebachien and American lobster: Homarus americanus ) to evaluate the well-being and mortality risks associated with both a lower operational salinity (long-term exposure) and an unavoidable salinity drop (short-term exposure) observed during routine large-scale water renewal operations. Economic gains achieved through reduction in the use of costly synthetic salt formulation were calculated. The savings achieved during three years of operation at 24 PSU have been applied to the improvement of the water quality control management capacities of the GLSE exhibit such as a sulphur-based denitrification unit, additional ozonation and protein skimming capacities.

First Record of the Hairy Squat Lobster Genus Lauriea Baba, 1971 (Crustacea: Decapoda: Anomura: Galatheidae) from Kenting, Southern Taiwan

The shallow water squat lobster genus Lauriea Baba, 1971 is reported for the first time from Taiwan. The three specimens collected from Kenting, southern Taiwan belong to Lauriea siagiani Baba, 1994. Lauriea siagiani is very distinctive by its striking coloration and having dense long plumose setae on the body. Its report in Taiwan fills the gap of geographical distribution of this species from Indonesia to Japan.

Biochemical Changes during the Reproductive Activity in Male Sand Lobster Thenus orientalis (Lund, 1793)

In a situation of increasing anthropogenic activities, assessing their impacts on organisms needs basic information from biological sciences to evaluate the degree of toxicity. Hence, an effort was made to furnish certain vital changes in the biochemical parameters during the reproductive phase in the normal immature and mature male sand lobster Thenus orientalis . The nutrients; protein, carbohydrate and lipid and the enzymes; LDH, NSE, ACP and ALP were estimated and recorded for a deep understanding of the reproductive biology of the taken edible lobster. Highly significant results (p<0.01) were obtained in the testis, vas deferens and hepatopancreas with reference to their nutrient content. Comparatively, elevated LDH was noted in immature forms. Less difference were found in NSE but among the phosphstases, alkaline type exhibited highly significant values (p<0.01) in the reproductive tissue indicating its need. The values registered will aid in the future to estimate the level of impact of any habitat toxicant on the biochemical aspects of maturation of the male sand lobster.

Genetic diversity of purple-legged shovel-nosed lobster Thenus unimaculatus in Thailand

Thenus unimaculatus or a purplelegged shovel-nosed lobster is one of the three Thenus species found in Thailand. Shovelnosed lobsters have been increasingly consumed and this could give a great threat to T. Unimaculatus. This species has a narrow range of distribution, found only in the Andaman Sea. Genetic diversity study of the purple-legged shovel-nosed lobster is therefore needed for evaluating its current genetic status. In this study, 71 specimens of T. unimaculatus were collected from five provinces along the Andaman Sea coastline. 12S ribosomal RNA (12S rRNA) and cytochrome C oxidase subunit I (COI) mitochondrial genes were PCR amplified. The 12S rDNA and the COI nucleotide sequence alignments of 60 and 70 samples, respectively, were successfully prepared, suggesting that the parsimony informative sites of COI gene was higher than that of 12S rDNA. Phylogenetic analysis using Maximum Likelihood method revealed that populations of T. unimaculatus in Thailand are fairly homogenised. This blended genetic diversity among the five provincial populations indicates that there is a circulation of the planktonic larvae, resulting from two different patterns of sea currents of the Andaman Sea.

Report on Lobster (Tonga)

Report on Lobster (Tonga)

Influences of sex, total length and weight on content of omega-3 in edible tissue of two crustacean species (Penaeus semisulcatus and Thenus orientalis) from the Persian Gulf.

In current research relationship between Eicosapentaenoic acid (EPA) and Docosahexaenoic acid (DHA) (% of total fatty acids) in edible tissue (muscle) of Green Tiger Shrimp (Penaeus semisulcatus) and Lobster (Thenus orientalis) collected from Persian Gulf, was investigated with some biological factors (total length, total weight and sex). Results showed that in all two species, EPA and DHA percent was decreased in relation to increase of total length and weight, that was significantly for all relationships in Green Tiger Shrimp and relationship between DHA and total length for Lobster (p<0.03). the result also showed that: There were highly significant differences between the sexes in EPA levels of P.semisulcatus, with males showing higher levels than females (12.38 and 10.56 respectively). Keywords: Penaeus semisulcatus, Thenus orientalis, Eicosapentaenic acid, Docosahexaenoic acid, Biological factors

Consider the lobster

Consider the lobster

Effect of Lead on the Expression of Nutritional Content in Edible Lobster, Thenus Orientalis (Lund, 1793)

The edible lobster, Thenus orientalis is an important food of commercial interest in the parts of South India. Evaluation of toxic effect of lead on the chosen animal for the LC 50 value and effect of heavy metal lead on the nutritional status viz. protein, carbohydrate and lipid in ovary, spermatheca, hepatopancreas, muscle and haemolymph was made. The results assume greater interest as most water bodies are increasingly subjected to environmental pressure due to pollution.

Adventures in Dining with Lobster Larry, Hacking Harold, and Sam the Shrimp

Adventures in Dining with Lobster Larry, Hacking Harold, and Sam the Shrimp

Design of Plastic Wall on Lobster Trap

Experiment was aimed to obtain a design of lobster trap wall. The trap was constructed by plastic. Design of wall consisted of standard gap, horizontal gap, vertical gap, and rectangular gap. From those walls, it was determined the wall that was easily crawled by lobster. There were 3 groups of lobster based on body weight and carapace length, i.e. group A (10.5 cm; 10 g), group B (15.5 cm; 70 g), and group C (17 cm; 100 g). The experiment tried to find out the wall color and lobster bait first. From the experiment, lobster preferred to choose crab and red wall. While, the wall design of vertical gap was easier crawled by lobster than those of three others. Keywords : Lobster trap wall, plastic, standard gap, horizontal gap, vertical gap, and rectangular gap.

Selectivity of flexible size-sorting grid in Mediterranean multispecies trawl fishery

The demersal multispecies trawl fishery in the western Mediterranean Sea has a poor selectivity; large numbers of juvenile fish are caught when using the legislated 40-mm diamond mesh cod end. The selectivity of a flexible sorting grid with 20-mm bar spacing (BS20) installed in front the conventional trawl cod end was investigated. The standard covered cod end method was used. Data was adequate for analyzing the selectivity of European hake Merluccius merluccius, poor cod Trisopterus minutus, greater forkbeard Phycis blennoides and Norway lobster Nephrops norvegicus. The selectivity of the 20-mm sorting grid was compared with the performance of 40-mm diamond (DM40) and square mesh (SM40) cod ends. The effect of a guiding funnel on the performance of the grid (BS20-f) was also explored. Finally, the potential changes in yield per recruit (Y/R) and biomass per recruit (B/R) after implementing a sorting grid were explored. An overall improvement in the 50% selection length (L50) with all four species was substantial when comparing the BS20 to the DM40. Higher improvement in L50s was achieved when the grid was equipped with the guiding funnel. When comparing the performance of the BS20-f to the SM40, there was no marked difference in L50s. The Y/R and B/R, however, are substantially higher with BS20-f for poor cod and about the same for European hake. BS20 compared to SM40 achieved lower Y/R and B/R for all four species; the smallest difference was observed for Norway lobster. Further development is required if the sorting grid is to be introduced into commercial fisheries.