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


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Authors

  • K. M. Rajesh Mangalore Research Centre of ICAR-Central Marine Fisheries Research Institute, P. B. No. 244, Hoige Bazar, Mangalore - 575 001, Karnataka, India
  • P. Rohit Mangalore Research Centre of ICAR-Central Marine Fisheries Research Institute, P. B. No. 244, Hoige Bazar, Mangalore - 575 001, Karnataka, India
  • S. Thomas Mangalore Research Centre of ICAR-Central Marine Fisheries Research Institute, P. B. No. 244, Hoige Bazar, Mangalore - 575 001, Karnataka, India
  • V. Suprabha Mangalore Research Centre of ICAR-Central Marine Fisheries Research Institute, P. B. No. 244, Hoige Bazar, Mangalore - 575 001, Karnataka, India
  • G. D. Nataraja Mangalore Research Centre of ICAR-Central Marine Fisheries Research Institute, P. B. No. 244, Hoige Bazar, Mangalore - 575 001, Karnataka, India
  • G. Sampathkumar Mangalore Research Centre of ICAR-Central Marine Fisheries Research Institute, P. B. No. 244, Hoige Bazar, Mangalore - 575 001, Karnataka, India

https://doi.org/10.21077/ijf.2017.64.special-issue.76262-26

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).

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Submitted

2017-12-04

Published

2018-03-14

How to Cite

Rajesh, K. M., Rohit, P., Thomas, S., Suprabha, V., Nataraja, G. D., & Sampathkumar, G. (2018). 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, 64. https://doi.org/10.21077/ijf.2017.64.special-issue.76262-26