Food and feeding habits of the narrow barred Spanish mackerel Scomberomorus commerson (Lacepede, 1800) off Karnataka, south-west coast of India

Rajesh, K M and Rohit, Prathibha and Thomas, Sujitha and Supraba, V and Nataraja, G D and SampathKumar, G (2017) Food and feeding habits of the narrow barred Spanish mackerel Scomberomorus commerson (Lacepede, 1800) off Karnataka, south-west coast of India. Indian Journal of Fisheries (Sp. Iss.), 64. pp. 182-185.

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    Abstract

    Scomberomorus commerson were collected on weekly basis during January 2012 to December 2014 at Mangalore Fishing Harbour. Stomach of 214 narrow barred Spanish mackerel measuring from 48 to 105 cm fork length (FL) for males and 45.5 to 115 cm FL for females were analysed to study their feeding habits. Fish with empty stomach were prevalent in almost all the months. Prey mainly comprised of fishes and crustaceans, with the fish component forming 99.9%. The index of relative importance (IRI) showed that the dominant prey were semi-digested fish remains (44.6%) of Sardinella longiceps (30.1%), Decapterus sp. (18.7%), whitebaits (2.5%), Rastrelliger kanagurta (1.5%) and Epinephelus spp. (1.1%), while Saurida sp. (0.7%), Megalaspis cordyla (0.5%), Scombroides sp. (0.2%) and shrimps (0.1%) were found occasionally in the gut. Index of stomach fullness (SFI) was 0.11 in August and 0.65 in January. Generally, SFI was higher during September to January and lower during February to August. The empty stomach ratio (ESR) ranged from 33.3% (August) to 92.3% (April).

    Item Type: Article
    Uncontrolled Keywords: Feeding, IRI, Karnataka, Narrow barred Spanish mackerel, Prey, Scomberomorus commerson
    Subjects: Food and Feeding
    Divisions: CMFRI-Mangalore
    Depositing User: Arun Surendran
    Date Deposited: 05 Jan 2018 08:18
    Last Modified: 05 Jan 2018 08:18
    URI: http://eprints.cmfri.org.in/id/eprint/12466

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