Interplay between reproduction and age selective harvesting: A case study of Hilsa (Tenualosa ilisha) fish at Sundarban estuary of northern Bay of Bengal, India

Debaldev Jana*, Sachinandan Dutta, G. P. Samanta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number1950023
JournalInternational Journal of Biomathematics
Volume12
Issue number2
DOIs
Publication statusPublished - Feb 1 2019

Keywords

  • age selective harvesting
  • bionomic equilibrium
  • extinction risk
  • Maturation delay
  • MSY
  • optimal harvesting

ASJC Scopus subject areas

  • Modelling and Simulation
  • Applied Mathematics

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