Jayasankar, J (2019) Fish Stock Assessment Models- Evolution and Possibilities. In: Advances in Marine Fisheries in India, 18-23 February 2019, Kochi.
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Abstract
Quantitative fish stock assessment has been a topic full of challenges and opportunities. It has held spellbound researchers, both biologists and statisticians alike ever since the first seeds were sown in the form of growth curves and biomass prediction, some seven decades back. The challenges were multi-faceted although the candidate resources remained almost stable on most of the angles from which they were assessed at. The life pattern or cycle of any given resource was well recorded with the distinct phases of arrival, survival, maturity and reproduction. In most of these models which were fancied at various points of time main focus was always on growth, mortality and reproduction. The epoch of an average fish was always kept in mind before any such paradigm was carved out. The life period was clearly interspersed with bionomical occurrences like larval stage, recruitment, predation, migration etc. The dynamics was what mostly targeted in the modeling initiatives and the jarring note in the smooth dynamics was the fishing related mortality, which is man-made. The populations were imagined to be a biomass pool with the eternal cycle of churning occurring incessantly. The period of study under most of the models is assumed to be based on blocks of a year or parts thereof and most of the defining parameters of these flux was measured per annum. When the annual biomass addition matches the natural depletion, the state and rate of various dynamic functions were most amenable for computational rigour.
| Item Type: | Conference or Workshop Item (Other) |
|---|---|
| Uncontrolled Keywords: | Fish Stock Assessment; Evolution; Possibilities |
| Subjects: | Marine Fisheries > Fisheries Management Aquaculture > Fisheries Management Marine Fisheries > Stock Assessment |
| Divisions: | CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division Subject Area > CMFRI-Kochi > Marine Capture > Fishery Resources Assessment Division |
| Depositing User: | Arun Surendran |
| Date Deposited: | 20 Jan 2020 07:10 |
| Last Modified: | 20 Jan 2020 07:10 |
| URI: | http://eprints.cmfri.org.in/id/eprint/14041 |
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