Fish larval transport in the coastal waters through ecological modelling

George, Grinson (2011) Fish larval transport in the coastal waters through ecological modelling. ["eprint_fieldopt_thesis_type_phd" not defined] thesis, Goa University.

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    Abstract

    It could be inferred from the study that ambient environmental parameters and food are major factors for larval survival and transport. This study further indicates that the chlorophyll abundance in the dwelling habitats of sardine at the initiation of their active breeding phase acts like a precursor of their annual biomass. In the case of passive swimmers and fish larvae numerical modelling is an effective tool in explaining the larval transport processes. There are initiatives globally to model the larval transport of marine organisms, and the present study is an attempt in that direction to explore the larval transport processes in the western coastal waters of India. Sparse reports and data sets on early life history stages of the marine organisms is a major lacunae in the study. This emphasizes the importance of generating long term datasets for the larvae of marine organisms in the Indian coastal waters. The future scope for this study is to improve the numerical model by incorporating the biological variables like prey-predation, food abundance and natural mortality. This can be achieved by carrying out the simulations for different regions and comparing them with longer time series data set. Remote Sensing and Geographical Information System (RS-GIS) can be largely used for demarcating potentially rich larval nursery areas based on modelling and observations. This can be a useful decision support system for the managers of fishery. Similarly, the release point of ballast waters and regulations for controlling the spread of obnoxious species like barnacles can also be identified. This present work suggests the relevance of applying remote-sensing and numerical model data as a surrogate for biological data sets in deriving scientific conclusions for management of marine ecosystems.

    Item Type: Thesis (["eprint_fieldopt_thesis_type_phd" not defined])
    Uncontrolled Keywords: Fish larval transport; coastal waters; ecological modelling
    Subjects: Theses
    Eggs and Larvae
    Marine Fisheries > Trophic Modelling
    Divisions: CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    Subject Area > CMFRI-Kochi > Marine Capture > Fishery Resource Assessment
    Depositing User: Arun Surendran
    Date Deposited: 01 Apr 2015 09:19
    Last Modified: 09 Sep 2015 16:00
    URI: http://eprints.cmfri.org.in/id/eprint/10342

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