Reproductive biology, diet and feeding pattern of longtail tuna Thunnus tonggol (Bleeker, 1851) in the north-eastern Arabian Sea off Gujarat, India

Mohammed Koya, K and Rohit, Prathibha and Abdussamad, E M and Abdul Azeez, P and Vase, Vinay Kumar and Bharadiya Sangita, A (2018) Reproductive biology, diet and feeding pattern of longtail tuna Thunnus tonggol (Bleeker, 1851) in the north-eastern Arabian Sea off Gujarat, India. Indian Journal of Fisheries, 65 (2). pp. 16-25.

[img]
Preview
Text
IJF_65_2_Mohamed Koya.pdf

Download (822kB) | Preview
Official URL: http://epubs.icar.org.in/ejournal/index.php/IJF/ar...
Related URLs:

    Abstract

    Longtail tuna Thunnus tonggol (Bleeker, 1851) is the major tuna resource in the neritic realms of the northern Arabian Sea and forms considerable fishery in the coastal nations in the region. Gujarat, on the north-west coast is the major province landing longtail tuna in India. The paper attempts to add to the hitherto sparse knowledge base on biology of the longtail tuna fished along the north-west coast of India, through a study spanning from 2011 to 2015. Reproductive biology, spawning, food and feeding dynamisms of the species were investigated. Sex ratio of the species was estimated as 1:2.1 and depicted an increase in male preponderance as the size increased. The fish attains maturity at 607 mm and it spawns during summer months starting from May. The fish is typically a non-selective feeder and over 22 taxa comprising of fishes, cephalopods and crustaceans formed the diet at varying rates over the year. Variation in feeding intensity at different reproductive stages is discussed besides the constraint posed by the large presence of unidentifiable, partially digested gut content.

    Item Type: Article
    Uncontrolled Keywords: Diet, Longtail tuna, Northern Arabian Sea, North-west coast of India, Reproduction
    Subjects: Fishery biology
    Food and Feeding
    Demersal Fishes > Tunas
    Divisions: CMFRI-Mangalore
    CMFRI-Veraval
    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: 03 Jul 2018 10:41
    Last Modified: 03 Jul 2018 11:01
    URI: http://eprints.cmfri.org.in/id/eprint/12925

    Actions (login required)

    View Item View Item