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| Provedor de dados: |
OceanDocs
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| País: |
Belgium
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| Título: |
Growth, mortalities and yield per recruit of the shrimp fish scad Alepes djedaba (Forskal) (F. Carangidae), from Abu Qir Bay, Eastern Alexandria, Egypt
Growth, mortalities and yield per recruit of A. djedaba from Abu Qir Bay, Alexandria, Egypt
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| Autores: |
El-Sayed, H.Kh.A.
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| Data: |
2013-08-14
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| Ano: |
2005
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| Palavras-chave: |
Mortality
Yield/recruit
Growth
Carangidae
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| Resumo: |
Growth and population dynamics parameters of Alepes djedaba as an exotic carangid fish species from Red Sea into the Levant Basin of the Mediterranean Sea, were investigated. Fish samples were obtained from purse-seiners operating during the day time from Jan. to Dec. 2003 in Abu Qir Bay, Eastern Alexandria. The results obtained show that back-calculated lengths (based upon otolith readings) for the first; second and third age groups were 10.38; 15.4 and 19.32 cm TL respectively, the estimated Bertalanffy growth parameters were L∞=33.29 cm, K=0.2473 and t0= -0.51. The Length-weight relationship was represented by the formula: Log W=-1.9245+2.9762 Log L. Total mortality (Z), natural mortality (M) and fishing mortality (F) were 1.85; 0.62 and 1.23 respectively. The exploitation rate (E) was found to be 56%. A Beverton and Holt yield per recruit model indicated that the maximium sustainable yield could 20.20 g at fishing mortality F= 1.6, while the current yield per recruit was 20.10 g at fishing mortality 1.23. The results proved that the purse-seine fishery of A. diedaba is over exploited in Abu-Qir Bay and requires to be managed.
This Journal is published by Ain Shams University, Faculty of Sciences, Zoology Department
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| Tipo: |
Journal Contribution
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| Idioma: |
Inglês
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| Identificador: |
Egyptian Journal of Aquatic Biologgy and Fisheries, 9 (4), p. 145-160
1110-6131
http://hdl.handle.net/1834/4995
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| Relação: |
20 references
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| Direitos: |
http://creativecommons.org/licenses/by-nc/3.0/
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