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Discovering spawning ground of Hilsa shad (Tenualosa ilisha) in the coastal waters of Bangladesh

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  • Hossain, M. Shahadat
  • Sarker, Subrata
  • Chowdhury, Sayedur Rahman
  • Sharifuzzaman, S.M.

Abstract

The availability of suitable freshwater spawning habitat is considered to be a major factor limiting the natural recruitment of anadromous Hilsa shad (Tenualosa ilisha) in the coastal waters of Bangladesh. Against this context, we applied georeferenced habitat database to determine spawning habitat suitability index of Hilsa shad. Landsat imagery and thematic layers were analyzed with ENVI and GIS, and developed a series of GIS models to identify and ranking of suitable spawning grounds. Thus, among the studied 29,484km2 aquatic ecosystems, only 6% (=1851km2) area is the most suitable consisting of the rivers Meghna, Shahbazpur, Tetulia and Ander Manik as well as the channel of Sandwip island. Whereas, 20% (=5996km2) area including river, estuary and near shore water bodies are moderately suitable, and in particular, the offshore deep waters occupying 73% (=21,637km2) area is least suitable. The model outputs were verified after field data of fishers’ indigenous knowledge with an accuracy level of 87%. This study suggests that necessary measures, such as conservation and management of spawning habitat should be implemented for an increased reproductive and recruitment success that will eventually improve populations of wild Hilsa shad in Bangladesh.

Suggested Citation

  • Hossain, M. Shahadat & Sarker, Subrata & Chowdhury, Sayedur Rahman & Sharifuzzaman, S.M., 2014. "Discovering spawning ground of Hilsa shad (Tenualosa ilisha) in the coastal waters of Bangladesh," Ecological Modelling, Elsevier, vol. 282(C), pages 59-68.
    • Handle: RePEc:eee:ecomod:v:282:y:2014:i:c:p:59-68
    DOI: 10.1016/j.ecolmodel.2014.03.001
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    References listed on IDEAS

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    1. Sun, Chin-Hwa & Chiang, Fu-Sung & Tsoa, Eugene & Chen, Min-Hsiang, 2006. "The effects of El Nino on the mackerel purse-seine fishery harvests in Taiwan: An analysis integrating the barometric readings and sea surface temperature," Ecological Economics, Elsevier, vol. 56(2), pages 268-279, February.
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    3. Apurba Krishna Deb & C. Emdad Haque, 2011. "‘Sufferings Start from the Mothers’ Womb’ : Vulnerabilities and Livelihood War of the Small-Scale Fishers of Bangladesh," Sustainability, MDPI, vol. 3(12), pages 1-28, December.
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    Cited by:

    1. Mohammed Shahidul Alam & Qun Liu & Md. Rashed-Un- Nabi & Md. Abdullah Al-Mamun, 2021. "Fish Stock Assessment for Data-Poor Fisheries, with a Case Study of Tropical Hilsa Shad ( Tenualosa ilisha ) in the Water of Bangladesh," Sustainability, MDPI, vol. 13(7), pages 1-23, March.
    2. Mohammad Mahmudul Islam & Naimul Islam & Ahasan Habib & Mohammad Mojibul Hoque Mozumder, 2020. "Climate Change Impacts on a Tropical Fishery Ecosystem: Implications and Societal Responses," Sustainability, MDPI, vol. 12(19), pages 1-21, September.

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