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CRG Seminar: Modelling Fish Stock Biomass Dynamics in a Multi-gear Fishery and Determining the Stock Status
January 31, 2025 @ 12:00 pm - 1:00 pm
Abstract: A marine fishery is an important sector in many countries as it contributes towards the nutritional requirements of people and provides income and employment to the associated population. Compared to other natural resources fish being a living resource has the capacity for rebuilding through reproduction. Sustainable management of the marine fishery resources is very important to avoid resource depletion as well as collapse. Biomass of individual species needs to be estimated and its dynamics have to be studied regularly for determining vital reference points such as maximum sustainable yield and its use for sustainable management of the fish stocks. An important model used for studying the biomass dynamics of marine fish stocks is the biomass dynamics model and its modified versions. The necessary information required for such study is time series data on fish catch and fishing effort in terms of number of hours of fishing. Most of the fisheries are of multi-species and multi-gear nature with each fishing gear targeting more than one fish species. Hence biomass dynamics models admitting multi-gear type of harvest are most suited for marine fishery management. Annual fish catch along with fishing effort of a group of fishing gears contributing to the catch are simultaneously used in these models to estimate biomass and other model parameters to make conclusions for fisheries management. One of these models applied to the marine fish stocks in India is the focus of this presentation.
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