Length- weight relationship, condition factor and age of kawakawa (Euthynnus affinis), in the eastern Mediterranean coast, North Sinai, Egypt.

Document Type : Original Article

Authors

1 fish production,Agriculture, Al-Azhar University , Cairo

2 National Institute of Oceanography and Fisheries NIOF , Egypt

3 National Institute of Oceanography and Fisheries NIOF, Egypt

Abstract

Fisheries (which includes the management, catching, processing and marketing of fish stocks) and aquaculture (the farming of fish) provide an important source of food, employment, income and recreation for people throughout the world. Millions of people depend upon fish for their livelihoods. Artisanal or small-scale fisheries are important worldwide contributing more than 25% of global marine landings. Monthly length composition data (Total length) of kawakawa (Euthynnus affinis), which landed between January and December 2020 in the Coastal Waters of the Mediterranean coast of North Sinai Egypt were used to estimate the length-weight relationship, condition factor, age and growth. The computed length-weight relationship (W = 0.0186 L 2.8595) showed a negative isometric growth pattern. The average condition factor was 1.12 and the relative condition factor was 1.01. The growth parameters of the von Bertalanffy equation were estimated as L∞=87.67.2 cm, K= 0.24 per year and tо = -0.56 per year. This study strongly recommended minimizing the fishing activities of E. affinis in the Eastern Mediterranean

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Egyptian Journal for Aquaculture
Volume 12, Issue 3
September 2022
Pages 40-56

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