Estimation of tuna longline hook depth for improved performance in Fiji

Relation between Hook Depth and Fishing Efficiency in Surface Longline Gear

The longline gear employed in this study consisted of "baskets" between floats (Fig. 1). Float lines measured about 7m, while the main line within each basket measured about 1200 m. Branch lines (33 per basket) were 15m long. This standard gear design is modified by ences by each species. Suzuki et al. (1977) state that the same fishing methods and longline gear are frequently used regardless o...

Short communication:The effect of depth of operation and soaking time on catch rates in the experimental tuna longline fisheries in Lakshadweep Sea, India

Short communication:The effect of depth of operation and soaking time on catch rates in the experimental tuna longline fisheries in Lakshadweep Sea, India

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SCIENTIFIC COMMITTEE THIRD REGULAR SESSION 13-24 August 2007 Honolulu, United States of America BAIT LOSS AND ITS POTENTIAL EFFECTS ON FISHING POWER IN PELAGIC LONGLINE FISHERIES WCPFC-SC3-FT SWG/WP-6

We analyzed 1950s survey data with generalized estimating equations (GEEs) to quantify factors that influence the rate that bait is lost from pelagic longlines. Hook depth, bait species, local tuna abundance, and the timing of longline operations strongly influenced loss rates. Loss rates increased with tuna abundance and soak time. They declined with hook depth and were low for firm-bodied bai...

A review of shark bycatch mitigation in tuna longline fisheries

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