Analysis of Virtual Populations of Small Pelagic Fish Most Caught in Algeria

Dahel Et Al., Amina Tania

doi:10.21608/ejabf.2024.349723

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Egyptian Journal of Aquatic Biology and Fisheries

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	Analysis of Virtual Populations of Small Pelagic Fish Most Caught in Algeria
Article 32, Volume 28, Issue 2, March and April 2024, Page 523-536 PDF (839.26 K)
Document Type: Original Article
DOI: 10.21608/ejabf.2024.349723
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Author
Amina Tania Dahel et al.
Abstract
The biology and dynamics of sardina pilchardus and sardinella aurita from the east coast of Algeria were studied to compensate the lack of data concerning the exploitation of their stocks in this area. The von Bertalanffy growth equations were as follows: Lt = 21.58 [1-e^{-0.39 (t +0.086)}] for S. pilchardus and Lt = 26.68 [1-e^{-0.41 (t +0.085)}] for S. aurita. The equations of the length - weight relationship were TW = 0.0039 TL^3.236 for S. pilchardus and TW = 0.005 TL^3.134 for S. aurita. The lengths at first maturity (L_m50) were 11.61 and 13.54cm for S. pilchardus and S. aurita, respectively. The natural mortalities (M) were 0.46 year⁻¹ for both species, while those of fishing mortality coefficients (F) were 1.49 year⁻¹ for S. pilchardus and 1.41 year⁻¹ for S. aurita. The results of the virtual population analysis (VPA) showed the existence of an overfishing status for both species. To limit the risk of stock collapse, we recommended adjusting the F_current fishing effort factor to F_0.1, it should be reduced by 65% for S. pilchardus and 60% for S. aurita; this would allow for resources renewal. as well as increasing the exploitable biomass of both stocks.
Keywords
Small pelagic; Exploitation; Fishing effort F0.1; Overfishing; Eastern Algerian coasts


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