Integration of Spatial Attributes in Fishery Biological Studies: The Paradigm and a Case Study of Large Pelagic Fishery In the NW Coast In: ICAR Sponsored Winter School on Recent Advances in Fishery Biology Techniques for Biodiversity Evaluation and Conservation, 1-21 December 2018, Kochi.

Koya, Mohammed (2018) Integration of Spatial Attributes in Fishery Biological Studies: The Paradigm and a Case Study of Large Pelagic Fishery In the NW Coast In: ICAR Sponsored Winter School on Recent Advances in Fishery Biology Techniques for Biodiversity Evaluation and Conservation, 1-21 December 2018, Kochi. [Teaching Resource]

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15-Winter School on Recent Advances in Fishery Biology Techniques for Biodiversity Evaluation and Conservation_2018_Mohammed Koya.pdf

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    Abstract

    Wide spatial distribution and temporal variations in abundance are unique features of fishery resources (Vivekanandan, 2005). The spatial variability of the stock reflects the pattern in fishing effort, thereby the fishing mortality owing to the target stock being aggregated or due to management restrictions, distance to port, vessel size, and the experience and habits of individual fishers (Yong, 2014). Ignoring this spatial variation can lead to serious biases in estimates of fishing mortality and yield (Hart 2001). Indexes related to catch rates or abundances are used often in the stock assessments or are the indexes for monitoring fish stocks despite the fact that the non-random spatial distribution of fish and fishing effort makes the interpretation of commercial catch rate (CPUE) difficult (NRC 1999). Such targeted deployment of fishing effort results in constant or increasing CPUE even though the stock size is decreasing till a point where the stock is at very low levels. A number of fish stock shave collapsed due to such misinterpretation of CPUE, the prominent being the case of northern cod (Hilborn and Walters 1992).

    Item Type: Teaching Resource
    Subjects: CMFRI Departments > CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    CMFRI > CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    CMFRI-Kochi > Marine Capture > Pelagic Fisheries

    Fishery biology
    Divisions: CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    Subject Area > CMFRI-Kochi > Marine Capture > Pelagic Fisheries
    Depositing User: Arun Surendran
    Date Deposited: 04 Jan 2019 07:00
    Last Modified: 15 Feb 2019 04:56
    URI: http://eprints.cmfri.org.in/id/eprint/13317

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