Date of Award

Summer 1987

Document Type

Thesis

Degree Name

Master of Science (MS)

Department

Ocean & Earth Sciences

Program/Concentration

Oceanography

Committee Director

David L. Feigenbaum

Committee Member

Anthony J. Provenzano

Committee Member

Cynthia Jones

Call Number for Print

Special Collections LD4331.O35 F74

Abstract

Six fish aggregating devices (FADs) were deployed in June and monitored through December 1986. Emphasis was placed on trolling, live-bait handlining and longlining.

There was a significant difference (x2 = 7.815, pCoryphaena hippurus) which made up 64.2% of the catch.

Handlining at night around inshore buoys for one boat yielded 82.7 kg per trip. Pelagic fish comprised 83.9% of the catch, with the majority (81.4%) being kingfish (Scomberomorous cavalla). Catch rates were 50% higher and the species diversity much greater on the FADs versus control during experimental nightfishing, but the difference was not significant.

Longlining resulted in 3.4 kg/13 hook set after gear improvements. This had low economic returns, but can be used along with nightfishing at little cost. Nightfishing was the most profitable method around FADs. Trolling was uneconomical near FADs, but did improve catch rates and has potential to enhance recreational angling.

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DOI

10.25777/1k5q-wj63

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