Population Dynamics and Stock Assessment of Two Lizardfish Species in the Southern Red Sea Coasts, Foul Bay, Egypt | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 18, Volume 26, Issue 6, November and December 2022, Pages 299-311 PDF (739.15 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2022.272451 | ||
| Author | ||
| Sahar Fahmy Mehanna | ||
| Abstract | ||
| Lizard fishes are the most abundant demersal fishes inhabiting the Egyptian coasts of the Red Sea. They constitute 30% of the total trawl catch in the northern part (Gulf of Suez) and 26.9% of the total trawl catch in the southern (Foul Bay) part. A stock assessment was done for the pseudocohort of two lizardfish species from Foul Bay. Random samples were collected between October 2013 and November 2021. A total of 1553, and 1320 Saurida undosquamis and S. tumbil specimens were collected, respectively, from Foul Bay. Otoliths were used for age determination and differentiation between the species and sexes. The von Bertalanffy growth parameters (L∞, K, and t0) were estimated for males, females and the whole population of each species. The instantaneous annual rates of total and fishing mortality and subsequently the exploitation rates were estimated and the yield per recruit was analyzed. The stock assessment revealed an over-exploitation situation for lizardfish fisheries in Foul Bay. The relationship between length and weight indicates an isometric growth for S. undosquamis and a positive allometric growth for S. tumbil. | ||
| Keywords | ||
| Red Sea; Foul Bay; Synodontidae; Saurida undosquamis; S. tumbil; Population dynamics; Stock assessment | ||
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