FISHERIES MANAGEMENT OF THE SLIMY MACKEREL SCOMBER JAPONICUS W THE GULF OF SUEZ BASED ON RELATIVE YIELD PER RECRUIT ANALYSIS. | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 11, Volume 6, Issue 3, September 2002, Page 217-232 PDF (528.14 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2002.1758 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Sahar F. Mehanna Sahar F. Mehanna | ||||
| National Institute of Oceanography and Fisheries P.O.Box 182, Suez, Egypt. | ||||
| Abstract | ||||
| Atotal of 928 slimy mackerel Scomber japonicus was collected from the Gulf of Suez during the fishing season 2000/2001. Age, growth, mortality, relative yield per recruit and biomass per recruit were studied. Age was determined by otolith-reading technique and was found to be four years. The values of the von Bertalanffy growth parameters were K = 0.48 year"1 and L^ = 33.06 cm. The mean total mortality coefficient "Z" was found to be 1.24 year"1. The natural mortality coefficient "M" was estimated as 0.22 year"1. Exploitation rate E was estimated as 0.82. The relative yield per recruit and biomass per recruit analysis showed that the stock of Scomber japonicus in the Gulf of Suez is overexploited and the fishing mortality should be decreased while length and age at first capture should be increased. | ||||
| Keywords | ||||
| Scomber japonicus; Age; Growth; mortality exploitation rate; length at first capture; relative yield relative biomass per recruit | ||||
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