Comparative Biological Study on the Shrimp Scad Alepes djedaba Between Its Native and Non-Native Habitats, Egypt | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 46, Volume 28, Issue 2, March and April 2024, Pages 757-767 PDF (867.64 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2024.350931 | ||
| Author | ||
| Ahmed N. Mohamed et al. | ||
| Abstract | ||
| The length frequency distribution, age, growth and length-weight relationship parameters of shrimp scad Alepes djedaba population in its native habital (Red Sea, Gulf of Suez fishing area) were compared with those in its non-native habitat (Mediterranean Sea, Alexandria fishing area) during the period from January 2022 to December 2022. The estimated length-weight relationship for combined sexes (♂♀) indicated an isometric growth in both native and non-native habitat, with no difference between both areas. The longevity of this species was estimated to be 6 years in the Gulf of Suez and 5 years in Alexandria. The highest growth rate in length was recorded in the first year of life (40% in the Gulf of Suez and 46% in Alexandria). Growth in length for both sexes was described by the von Bertalanffy equation as: Lt = 40.01 (1-e-0.43 (t+0.097)) in the Gulf of Suez; Lt = 34.05 (1-e-0.48(t+0.175)) in Alexandria. The results suggested that the A. jedaba populations in the Gulf of Suez and Alexandria may differ, indicating the need for detailed analysis to confirm if this species, after inhabiting the Mediterranean Sea, has undergone any changes from its original population or not. | ||
| Keywords | ||
| Red Sea; Mediterranean Sea; Alepes djedaba; Lessepsian migrant; Length frequency; Age; Growth | ||
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