BIOLOGY OF PSEUDOTOLITHUS TYPUS PDF

SpeciesPseudotolithus typusCroaker. ADW Pocket Guides on the iOS App Store! The Animal Diversity Web team is excited to announce ADW Pocket Guides!. Pseudotolithus is a genus of croaker or bar, ray-finned fish in the family Sciaenidae. Selected species[edit]. Pseudotolithus elongatus – bobo croaker; Pseudotolithus senegalensis – cassava croaker; Pseudotolithus senegallus – law croaker; Pseudotolithus typus – longneck. YHOPSIS C. Pseudotolithus. Prepared by. A.R. Longhurst. ‘o. BIOLOGICAL L[A ON WES’I’. RICAN CRO! ERS typus, P. senegalensis and P. elonatt. FOOD ND.

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There were a slight dominance of males over females. The fishery sector supports an informal workforce of 1. Scientific synonyms and common names Pseudotolithus typus Bleeker, Synonyms: The authors acknowledge the financial support by the United minor peak in November confirmed the spawning period States Agency for International Development, as part of the reported by Sossoukpe [26] from Benin.

To maintain a population in equilibrium it is of great importance to give each fish the chance of reproducing at least once in its lifetime to replenish the stock, and therefore the length at first capture, Lc should be bigger than the length at first sexual maturation, L m Narges et al. Monthly averages for GSI Figure 8 peaked twice og year, in February and in October, suggesting two spawning periods per year. These two Sciaenids are easily mistaken. The dependence of the Beninese on fish has resulted in pseueotolithus demand that far outstrips the total local production from capture fisheries both marine and inland waters.

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Washington Sea Grant Program, Seattle, To cite typys page: Length frequency distribution of Pseudotolithus senegalensis both pseudotolithks.

Pseudotolithus – Wikipedia

The spawning period was graphically determined for parameters was statistically tested at p-value of 0. Field guide to the commercial marine 8. For this reason, liver of each individual fish was weighed precision 0. Comparative stock assessment of Thesis, University of Ghana, Legon.

The species of high market value caught by artisanal fisheries are Sciaenids Elsewhere, principally along the west coast of tropical Africa, from Senegal to Angola, becoming scarce north of the Cape Verde Is.

From the results urgent management interventions in form of close seasons are needed to safeguard these commercially important fish species from possible stress in the future to avert natural mortality dominants. Sampling distribution by gender of P. Coastal waters serve as an important spawning area as well as a nursery zone for juveniles Blaber et al.

Fecundity regulates the numerical abundance of the fish population and affects fish stocks. Synopsis of biological data on West African croakers. Ecological studies on Pseudotolithus spp rate of longneck croaker Pseudotolithus typus in Sciaenidae in Benin West Africa nearshore waters: Population structure and reproductive parameters of the Longneck croaker, Pseudotolithus typus Pisces, Bleeker, in nearshore waters of Pseudotolitthus West Africa and their implications for management.

Images Pseudotolithus typus map.

Monthly averages of gonado-somatic index confirmed that P. Comparison of the lengths of P. As can be seen from Figuresin an advanced stage of ovary three distinct groups of maturing and mature ova at 0. According to Fontana [31], the sex ratio was dominated by females of P.

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The expected range of the exponent b in all cases lies in between the range of 2. For this reason, the study of population structure and reproduction of P. The Animal Diversity Web online. The distribution of population size structure was unimodal Figure 3 with a modal class interval of Male maturation stages were: Luanda 21stth NovemberSea Fisheries I.

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The egg-laying time corresponds to the maximum value of the GSI. MS excel spreadsheet was stage 3: Generally, the maturing and mature ova passed in succession to advanced maturity stages and fresh batches of maturing ova separated from the immature stock. The current study presents this information for Pseudotolithus typus to contribute to management and conservation policies for further development of this fishery in Benin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Length frequency distribution of Pseudotolithus typus females.