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A study on some population parameters of mantis shrimp (Squilla mantis L., 1758) in Izmir Bay (Aegean Sea)

Published online by Cambridge University Press:  21 February 2017

Naciye Erdoğan Sağlam*
Affiliation:
Fatsa Faculty of Marine Science, Ordu University, 52400, Fatsa, Ordu, Turkey
Yeşim Demir Sağlam
Affiliation:
Fatsa Faculty of Marine Science, Ordu University, 52400, Fatsa, Ordu, Turkey
Cemil Sağlam
Affiliation:
Faculty of Fisheries, Ege University, 35040, Bornova, İzmir, Turkey
*
Correspondence should be addressed to: N. Erdoğan Sağlam, Fatsa Faculty of Marine Science, Ordu University, 52400, Fatsa, Ordu, Turkey Email: [email protected]

Abstract

The population parameters of mantis shrimp (Squilla mantis Linnaeus, 1758) were studied regarding age composition, sex ratio, growth, survival and mortality rates, and the exploitation rate in the Aegean coasts of Turkey in 2013. We collected 936 specimens by shrimp gillnets along the coasts of Izmir Province from April to October 2013. The mean condition factor was K = 1.02 for both sexes, while the sex ratio was 58.7% for female and 41.3% male. Mean lengths, mean weight and length–weight relationship were calculated as TL = 12.57 ± 0.07 cm, CL = 3.02 ± 0.02 cm, W = 22.14 ± 0.37 g, W = 0.0098 × L3.02. Age determination was based on indirect ageing through length–frequency data using the Bhattacharya method. The age of the population varied from 0+ to 3+. Von Bertalanffy growth parameters were estimated as TL = 19.69 cm, CL = 4.74, W = 79.41 g, k = 0.50 year−1 and t0 = −0.37 year. Mortality and exploitation rates derived as Z = 1.90, M = 1.16, F = 0.74 and E = 0.39, respectively.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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