Age and growth patterns of the lizard fish, Saurida undosquamis (Richardson, 1848), from the Gulf of Suez, Red Sea, Egypt

Document Type : Original Article

Authors

1 Faculty of Agriculture, Al Azhar University

2 Department of Fish Production, Faculty of Agriculture, Al-Azhar University

3 Department of Fish Production, Faculty of Agriculture, Al-Azhar University.

4 National institute of oceanography and fisheries (NIOF)

Abstract

The lizardfish, Saurida undosquamis, is a species of significant economic importance in the Suez Gulf. This study examined its growth and reproductive characteristics, with age estimation conducted through otolith readings from specimens collected at Attaka Harbor over a one-year period from January to December 2023. A total of 3,183 fish were analyzed to establish the weight- length relationships, yielding the parameters. For males, a = 0.0143, b = 3.0784, while for females, they were a = 0.0077, b = 3.0225. Growth patterns were modeled using the function of growth by Von-Bertalanffy, with parameters, for males as L∞ = 44.9 cm, K = 0.558 year-1 and to = - 0.61, and for females as L∞ = 49.23 cm, K = 0.571 year-1, and to = -0.82. These growth parameters facilitated the estimation of total mortality rates through length-transformed catch data, revealing rates of 3.77 per year for male 2.22 per year for female.

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