Effects of circle versus J-style hooks on target and non-target species in a pelagic longline fishery

2006 ◽  
Vol 80 (2-3) ◽  
pp. 239-250 ◽  
Author(s):  
D.W. Kerstetter ◽  
J.E. Graves
Keyword(s):  
Longline Fishery ◽  
Target Species ◽  
Pelagic Longline Fishery ◽  
Pelagic Longline

Catch and Release in Marine Recreational Fisheries

2002 ◽  
Keyword(s):  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Longline Fishery ◽  
Target Species ◽  
Catch Per Unit Effort ◽  
Preliminary Results ◽  
Catch And Release ◽  
Incidental Catch ◽  
Pelagic Longline Fishery ◽  
Pelagic Longline

<em>Abstract.</em>—The fishing characteristics of circle hooks and straight shank or “J” hooks were investigated in the pelagic longline fishery during two successive trips. In one trip, circle hooks and J-hooks of comparable size were alternated along the length of the longline on six sets of approximately 400 live-baited hooks each, allowing a preliminary comparison of catch per unit effort (CPUE), hooking location, and mortality between the two hook types. On a previous trip, records of hooking location and mortality were obtained for J-hooks on nine additional longline sets. Yellowfin tuna <em> Thunnus albacares </em>accounted for 60% of the catch; the remainder was composed of 15 other species, none of which was represented by more than eight individuals. There was higher CPUE for all species combined, using circle hooks (5.05 fish/100 hooks) as compared with using “J” hooks (2.28 fish/100 hooks). Similar results were observed with the catch of the target species (yellowfin tuna), for which CPUE was approximately 2.5 times higher with circle hooks (3.33 tuna/100 hooks) as compared with J-hooks. Circle hooks also resulted in a lower mortality for all species (31% versus 42%) and for the target species (21% versus 39%). For all species, 95% of the fish taken on circle hooks were hooked in the jaw. Hooking location varied by species, but for all species combined, circle hooks consistently had a higher frequency of jaw hooking and a lower frequency of gut hooking than J-hooks. These preliminary results suggest that use of circle hooks in the pelagic longline fishery targeting yellowfin tuna may not only increase CPUE and survival of this species but also improve the survival of incidental catch and bycatch.

Circle hook effectiveness for the mitigation of sea turtle bycatch and capture of target species in a Brazilian pelagic longline fishery

2010 ◽  
Vol 20 (4) ◽  
pp. 428-436 ◽  
Author(s):  
Gilberto Sales ◽  
Bruno B. Giffoni ◽  
Fernando N. Fiedler ◽  
Venâncio G. Azevedo ◽  
Jorge E. Kotas ◽  
...  
Keyword(s):  
Sea Turtle ◽  
Longline Fishery ◽  
Target Species ◽  
Pelagic Longline Fishery ◽  
Pelagic Longline

Are circle hooks effective management measures in the pelagic longline fishery for sharks in the Gulf of Gabès?

2020 ◽  
Vol 30 (6) ◽  
pp. 1172-1181
Author(s):  
Bechir Saidi ◽  
Khaled Echwikhi ◽  
Samira Enajjar ◽  
Sami Karaa ◽  
Imed Jribi ◽  
...  
Keyword(s):  
Longline Fishery ◽  
Effective Management ◽  
Gulf Of Gabes ◽  
Gulf Of Gabès ◽  
Management Measures ◽  
Pelagic Longline Fishery ◽  
Pelagic Longline

scholarly journals Tori lines mitigate seabird bycatch in a pelagic longline fishery

2021 ◽  
Author(s):  
Eric Gilman ◽  
Milani Chaloupka ◽  
Asuka Ishizaki ◽  
Mathew Carnes ◽  
Hollyann Naholowaa ◽  
...  
Keyword(s):  
Longline Fishery ◽  
Pelagic Longline Fishery ◽  
Pelagic Longline

scholarly journals Seasonal Abundance and Size Structure of Sharks Taken in the Pelagic Longline Fishery off Northwestern Cuba

2021 ◽  
Vol 13 (3) ◽  
pp. 289-305
Author(s):  
Alexei Ruiz‐Abierno ◽  
J. Fernando Márquez‐Farías ◽  
Ariadna Rojas‐Corzo ◽  
Valerie Miller ◽  
Jorge A. Angulo‐Valdés ◽  
...  
Keyword(s):  
Size Structure ◽  
Seasonal Abundance ◽  
Longline Fishery ◽  
Pelagic Longline Fishery ◽  
Pelagic Longline

Shark bycatch and depredation in the U.S. Atlantic pelagic longline fishery

2008 ◽  
Vol 18 (4) ◽  
pp. 427-442 ◽  
Author(s):  
John W. Mandelman ◽  
Peter W. Cooper ◽  
Timothy B. Werner ◽  
Kerry M. Lagueux
Keyword(s):  
Longline Fishery ◽  
Pelagic Longline Fishery ◽  
The U.S ◽  
Pelagic Longline
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