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Free Content Growth and mortality of little tunny (Euthynnus alletteratus) larvae off the Mississippi River plume and Panama City, Florida

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Abstract:

Larval and early juvenile little tunny, Euthynnus alletteratus, were collected from the northern Gulf of Mexico (434 fish the Mississippi River delta region and 150 off Panama City, Florida) using a 1 × 2 m, 0.947-mm mesh neuton net and a 1 × 1 m, 0.333-mm mesh Tucker trawl. Sagittae were removed from 200 fish collected from the Mississippi River delta region and 150 collected from off Panama City, Florida, and examined whole at 800X magnification. Daily growth increments were visible in the sagittae of little tunny (2.5—14.0 mm SL) which ranged in age from 2 to 13 d. Growth estimated as the slope of a regression of SL on age, was rapid (1.07 mm d−1). Fish collected off Panama City grew faster than those collected in the vicinity of the Mississippi River discharge plume. Instantaneous daily mortality rates, estimated from survivorship curves were higher in the Mississippi River plume fish (0.95) than those from Panama City, Florida (0.72).

Document Type: Research Article

Publication date: 1998-01-01

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  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
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