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Following tagged Yellowfin tuna along the east coast of India explains its feeding behavior: a case study in the Bay of Bengal

Rose P, Bright and Swetha, N and Baliarsingh, SK and Nimit, K and Nagaraja Kumar, M and Srinivasa Kumar, T and Dwivedi, R and Shenoi, SSC (2016) Following tagged Yellowfin tuna along the east coast of India explains its feeding behavior: a case study in the Bay of Bengal. Technical Report. INCOIS, Hyderabad.

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Abstract

Horizontal movement of pelagic fish predator, Yellowfin (Thunnus albacares) tuna, in the oceanic waters of Bay of Bengal has been decoded. Pop-up Satellite Archival Tags (PSATs) were attached to adult tunas to study their distribution and migration. For this, environmental satellite data were matched with the tag locations to understand and characterize habitats of this species. A sub-set of the tag data was selected corresponding to the maximum resident time of tuna indicated by a high density data points. The tagged tuna spent 60 to 70% of its time in the waters having surface temperature within 28o to 29.5oC and sea surface height anomaly within+5 to +12 cm. The tag positions were located on the satellite images; chlorophyll, sea surface temperature, zooplankton and sea surface height anomaly. The two conditions, specific range of temperature and prey abundance, were found necessary for aggregation of tuna.

Item Type: Monograph (Technical Report)
Additional Information: Copyright of this technical report belongs to INCOIS.
Uncontrolled Keywords: PSAT tagging, Yellowfin tuna, Bay of Bengal, habitat preference, environmental parameters
Subjects: Oceanography > marine biology
Oceanography > oceanography
Depositing User: INCOIS Library
Date Deposited: 19 Jul 2016 04:12
Last Modified: 19 Jul 2016 04:12
URI: http://moeseprints.incois.gov.in/id/eprint/4235

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