Stock Assessment and Potential management of Sardinella aurita Fisheries in the East Mediterranean sea (North Sinai coast).

Document Type : Original Article

Authors

1 Fcaulty of Agriculture, AL-Azhar University, Cairo, Egypt

2 General Authority for Fisheries Resources Development, EL-Arish, North Sinai, Egypt.

3 Department of Aquaculture, Central Laboratory for Aquaculture Research, Abbassa, Abo-Hammad, Shrkia, Egypt.

Abstract

Age, growth and population biology of Sardinella aurita were studies from a small fishery of East Mediterranean Sea (North Sinai coast). 4450 specimens ranged between 6 and 22.9 cm total length and varied from 3 to 77.1 g total weight, were collected from January to December, 2010. The relationship between length and weight was estimated as W=0.016 L2.611. Age was determined using scales reading technique and the longevity of this species was found to be 4 years. Growth in length and in weight at the end of each year were calculated. The growth parameters of the
Von-Bertalanffy equation were calculated as L∞= 28.37cm, K= 0.2336 Yr-1 and t0= - 0.9808 Yr. Growth performance index Ø was estimated as 2.2742. Total, natural and fishing mortality rates were 0.99.7 Yr -1, 0.3507 Yr -1 and 0.53 Yr-1 respectively. The currently exploitation rate (E=0.6) indicate that the stock of S. aurita in North Sinai
fishery is not overexploitation. The mean index of growth performance is lower than that for the another regions this may be related to unsuitable environment. 

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Egyptian Journal of Aquatic Biology and Fisheries
Volume 16, Issue 2
May and June 2012
Pages 121-132

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