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Assessment of three nemipterid stocks based on trawl surveys in the Gulf of Suez, Red Sea
- Source :
- Egyptian Journal of Aquatic Research, Vol 44, Iss 1, Pp 45-49 (2018)
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- The population structure of three Nemipterid species (Nemipterus japonicus, Nemipterus bipunctatus and Nemipterus zysron) from the Gulf of Suez was investigated. A total of 3663 specimens (2597 N. japonicus, 576 N. bipunctatus and 490 N. zysron) were collected during the fishing season 2014/2015 in the Gulf of Suez. The maximum life span estimated from otolith reading was 5 years for N. japonicus and N. bipunctatus while, it was 4 years for N. zysron. The parameters of von Bertalanffy growth equation were L∞ = 31.66 cm, K = 0.24 year−1 and to = −1.2 year for N. japonicus; L∞ = 29.55 cm, K = 0.26 year−1 and to = −1.2 year for N. bipunctatus and were L∞ = 24.69 cm, K = 0.38 year−1 and to = −0.84 year for N. zysron. The estimated exploitation rate for the three species exceeded the optimum exploitation rate, indicating an overexploitation of the nemipterid species in the Gulf of Suez. The yield per recruit analysis revealed that the fishing pressure of the trawling fleet in the Gulf of Suez, has overridden the critical level. Findings suggest that decrease in the fishing effort of trawl fishery and increase the length of the mesh size is required for the protection of the nemipteridae resources in the Gulf. Keywords: Trawl, Age and growth, Nemipterid species, Exploitation rate, Yield per recruit
- Subjects :
- Fishing
Population structure
Nemipterus bipunctatus
010501 environmental sciences
Aquatic Science
Oceanography
Von bertalanffy
01 natural sciences
lcsh:Aquaculture. Fisheries. Angling
medicine
Nemipterus japonicus
lcsh:Environmental sciences
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Water Science and Technology
Otolith
lcsh:SH1-691
lcsh:GE1-350
Trawling
04 agricultural and veterinary sciences
Fishery
Overexploitation
medicine.anatomical_structure
Geography
040102 fisheries
0401 agriculture, forestry, and fisheries
Subjects
Details
- ISSN :
- 16874285
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- The Egyptian Journal of Aquatic Research
- Accession number :
- edsair.doi.dedup.....44a64f111fc6bab30895e9e4d9e042f9
- Full Text :
- https://doi.org/10.1016/j.ejar.2018.02.005