New offspring due to sexual reproduction is not an instantaneous process from its birth,it takes time to be sexually mature.On the other hand,harvesting of commercially profitable fish population before the perfect si...New offspring due to sexual reproduction is not an instantaneous process from its birth,it takes time to be sexually mature.On the other hand,harvesting of commercially profitable fish population before the perfect size or weight is reached is not only a commercial loss but also risks the extinction of the population.Now,we discuss the issue of Ganges-Brahmaputra-Meghna basin,northern Bay of Bengal for the age-selective harvesting of Hilsa shad(Tenualosa ilisha)which lays eggs after its sexual maturation.Harvesting of hilsa before its sexual maturation risks its extinction and due to lamer body weight,it is not a commercially profitable policy.This is a reality of Sundarban estuary for hilsa fish harvesting,therefore,biologically and economically both India and Bangladesh are facing several problems.Empirical data of Frasergunje Fishing Harbor shows a clear picture as the supporting document of this mathematical problem.展开更多
文摘New offspring due to sexual reproduction is not an instantaneous process from its birth,it takes time to be sexually mature.On the other hand,harvesting of commercially profitable fish population before the perfect size or weight is reached is not only a commercial loss but also risks the extinction of the population.Now,we discuss the issue of Ganges-Brahmaputra-Meghna basin,northern Bay of Bengal for the age-selective harvesting of Hilsa shad(Tenualosa ilisha)which lays eggs after its sexual maturation.Harvesting of hilsa before its sexual maturation risks its extinction and due to lamer body weight,it is not a commercially profitable policy.This is a reality of Sundarban estuary for hilsa fish harvesting,therefore,biologically and economically both India and Bangladesh are facing several problems.Empirical data of Frasergunje Fishing Harbor shows a clear picture as the supporting document of this mathematical problem.
