Interactions Between Cetaceans and Longline Fishery Operations Around South Georgia

Ashford, Julian R.; Rubilar, Pedro S.; Martin, Anthony R.

doi:10.1111/j.1748-7692.1996.tb00598.x

Cited by 66 publications

(62 citation statements)

References 3 publications

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“…Sperm whales Physeter macrocephalus associate with fishing operations, particularly longline operations, in a number of locations around the globe (Rice 1989, Ashford et al 1996, Capdeville 1997, Nolan & Liddle 2000. In the Gulf of Alaska (GOA) depredation by sperm whales of longline gear set for sablefish has been occurring for over 3 decades.…”

Section: Introductionmentioning

confidence: 99%

Depredating sperm whales in the Gulf of Alaska: local habitat use and long distance movements across putative population boundaries

Straley¹,

Schorr²,

Thode³

et al. 2014

Endang. Species. Res.

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Satellite tags were attached to 10 sperm whales Physeter macrocephalus (1 whale was tagged in 2 different years) to determine the movements of sperm whales involved in removal of sablefish from longline fishing gear in the Gulf of Alaska (GOA). Tags , respectively). Tagged sperm whales primarily travelled over the slope, but one spent considerable time over the ocean basin. Information on the timing and movement patterns of sperm whales may provide a means for fishermen to avoid fishing at whale hot spots, potentially reducing interactions between whales and fishermen.

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Section: Introductionmentioning

confidence: 99%

Depredating sperm whales in the Gulf of Alaska: local habitat use and long distance movements across putative population boundaries

Straley¹,

Schorr²,

Thode³

et al. 2014

Endang. Species. Res.

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“…Estas interacciones han sido documentadas desde hace más de tres décadas (Northridge, 1984;Salas et al 1987;Ashford et al 1996). Sin embargo, es importante comprender que las interacciones se producen entre el hombre (Pesquerías) y los cetáceos (Trites et al 1997;Aguayo-Lobo, 1999).…”

Section: Introductionunclassified

Interacción entre la pesquería del bacalao de profundidad, Dissostichus eleginoides (Nototheniidae), con el cachalote y la orca en el sur de Chile: revisión del estado de conocimiento

Cáceres¹,

Aguayo‐Lobo

Acevedo

2016

Anales Instituto Patagonia (Chile)

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“…and petrels (Macronectes giganteus) (Ashford et al, , 1995(Ashford et al, , 1996Barea et al, 1994;Moreno et al, 2003, among others). Likewise, interactions occur between fishery's activities and whales, mostly sperm whales (Physeter macrocephalus) and orcas (Orcinus orca) (Salas et al, 1987;Ashford et al, 1996;Moreno et al, 2003). In these cases, the mammals feed on the specimens caught on the longlines when they are brought on deck, resulting in lost catches.…”

Section: Introductionmentioning

confidence: 99%

Fishing yields and size structures of Patagonian toothfish (Dissostichus eleginoides) caught with pots and long lines off far southern Chile

Guerrero¹,

Arana²

2009

lajar

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ABSTRACT. Herein, we compare information taken from the Patagonian toothfish (Dissostichus eleginoides) fishery operations carried out off the far southern coast of Chile (47°00'S-57°00'S) using pots (pots) and longlines. In January 2006 and from June to October 2006, 167 fishing hauls were done, 119 using long-lines and 48 using pots. The total Patagonian toothfish catch was 60.9 tons, of which 81.2% were caught with long-lines and 18.8% with pots. On average, 5,395 hooks and 147 pots were set per haul, with average yields of 0.08 kg hook -1 and 1.43 kg pot -1 . The average depth for setting the gear was 1,581 m (long-lines) and 1,318 m (pots). Significant differences were found between these two types of gear, as well as between the time of setting and the time of retrieval. Greater fishing yields were obtained from the long-line fishery operations, with significant differences between the gear types in terms of the catch per haul (kg haul -1 ) and the catch per length of the specimens retained (kg 1000 m -1 ). On average, the individuals caught with pots (110.8 cm total length) were larger than those caught with long-lines (105.1 cm total length). Nonetheless, no significant differences were recorded for the size structures. In terms of interactions with birds, during setting, no birds were observed at the trapping operations, whereas a few specimens (≤ 10 birds) were seen during only 2.5% of the long-line operations. During retrieval, birds were observed during 34.9% of the hauls with pots and 62.8% of the longline operations. The presence of mammals around the fishery operations during setting and retrieval was similar for both types of gear. Keywords: yields, pot, long-line, Patagonian toothfish, Dissostichus eleginoides, Chile.Rendimientos de pesca y estructuras de tallas de bacalao de profundidad (Dissostichus eleginoides) capturados con trampas y espineles en el extremo sur de Chile RESUMEN. Se compara información proveniente de operaciones de pesca de bacalao de profundidad (Dissostichus eleginoides) efectuadas mediante trampas y espineles en enero de 2006 y entre junio y octubre de 2006, frente a la costa sur-austral de Chile (47°00'S-57°00'S). Se realizaron 167 lances de pesca, 119 correspondieron a operaciones de pesca con espinel y 48 con trampas, registrándose una captura total de bacalao de profundidad de 60,9 ton, de las cuales 81,2% fue extraída con espinel y 18,8% con trampas. Se calaron en promedio 5.395 anzuelos/lance y 147 trampas/lance, obteniéndose un rendimiento promedio de 0,08 kg anzuelo -1 y 1,43 kg trampa -1 . La profundidad media de calado fue 1.581 m con espineles y 1.318 m con trampas, encontrándose diferencias significativas entre ambos aparejos, al igual que en el tiempo de calado y de virado. En las operaciones de pesca con espinel se obtuvo rendimientos de pesca superiores, siendo estas diferencias significativas entre los aparejos en términos de la captura por lance (kg lance -1 ) y la captura por longitud de retenida (kg 1000 m -1 ). Respecto del tamaño de los ejemplares cap...

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Interactions Between Cetaceans and Longline Fishery Operations Around South Georgia

Cited by 66 publications

References 3 publications

Depredating sperm whales in the Gulf of Alaska: local habitat use and long distance movements across putative population boundaries

Depredating sperm whales in the Gulf of Alaska: local habitat use and long distance movements across putative population boundaries

Interacción entre la pesquería del bacalao de profundidad, Dissostichus eleginoides (Nototheniidae), con el cachalote y la orca en el sur de Chile: revisión del estado de conocimiento

Fishing yields and size structures of Patagonian toothfish (Dissostichus eleginoides) caught with pots and long lines off far southern Chile

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