Sathianandan, T V and George, Grinson and Kuriakose, Somy (2017) Exploratory survey for biomass estimation. In: Course Manual Summer School on Advanced Methods for Fish Stock Assessment and Fisheries Management. Lecture Note Series No. 2/2017 . CMFRI; Kochi, Kochi, pp. 262-269.
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Abstract
Bottom trawl surveys are widely used for monitoring demersal stocks when a simple index of abundance is required for scientific and related work. From unfished stocks (or stocks for which no or few data on the fishery are available), preferably the unexploited stocks, biomass and annual yield estimates may also be derived by undertaking bottom trawl surveys. The estimation of total biomass from the catch per unit of effort (or unit area) using a trawl survey, however, involves several crucial assumptions, leaving such estimates rather imprecise. But we can resort to this method when we require an immediate input to be generated and the methodology is less time consuming and easy to carry out.
| Item Type: | Book Section |
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| Uncontrolled Keywords: | Exploratory survey; biomass estimation |
| Subjects: | Marine Fisheries > Estimation |
| 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 Sep 2017 08:39 |
| Last Modified: | 20 Sep 2017 08:39 |
| URI: | http://eprints.cmfri.org.in/id/eprint/12186 |
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