Spatial segregation by size of billfishes bycaught by the tuna purse-seine fishery in the Eastern Pacific Ocean

2021 ◽  
Vol 241 ◽  
pp. 106001
Author(s):  
Osman Crespo-Neto ◽  
Eric Díaz-Delgado ◽  
Tatiana A. Acosta-Pachón ◽  
Raúl O. Martínez-Rincón
Keyword(s):  
Pacific Ocean ◽  
Spatial Segregation ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Eastern Pacific Ocean ◽  
Purse Seine Fishery

scholarly journals Effects of gear characteristics on the presence of bigeye tuna (Thunnus obesus) in the catches of the purse-seine fishery of the eastern Pacific Ocean

2008 ◽  
Vol 65 (6) ◽  
pp. 970-978 ◽  
Author(s):  
Cleridy E. Lennert-Cody ◽  
Jason J. Roberts ◽  
Richard J. Stephenson
Keyword(s):  
Pacific Ocean ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Bigeye Tuna ◽  
Eastern Pacific Ocean ◽  
Mixed Species ◽  
Thunnus Obesus ◽  
Floating Object ◽  
Floating Objects ◽  
Purse Seine Fishery

Abstract Lennert-Cody, C. E., Roberts, J. J., and Stephenson, R. J. 2008. Effects of gear characteristics on the presence of bigeye tuna (Thunnus obesus) in the catches of the purse-seine fishery of the eastern Pacific Ocean. – ICES Journal of Marine Science, 65: 970–978. Overfishing of bigeye tuna in the eastern Pacific Ocean has motivated a search for a practical means of reducing the catch of bigeye tuna in mixed species aggregations. To explore the effects of gear characteristics on the catch of bigeye tuna, a classification algorithm for the presence/absence of bigeye tuna catch in purse-seine sets on floating objects is developed, using the tree-based method, random forests. Although the location of the set was the strongest determinant of bigeye tuna catch with these data, bigeye tuna in some areas were more likely to be caught on floating objects with greater underwater depths and with deeper purse-seines. Misclassified sets that caught bigeye tuna were concentrated within certain vessels, suggesting the existence of additional vessel effects. Results indicate that fishers may avoid catching bigeye tuna in some areas by changing the depth of the material hanging from the floating object and the actual fishing depth of the purse-seine, or by moving to other fishing areas. Nonetheless, given the complexity of configuring a purse-seine, and the difficulties associated with monitoring compliance with gear regulations, fishery-wide gear restrictions would be problematic.

Foraging ecology of silky sharks, Carcharhinus falciformis, captured by the tuna purse-seine fishery in the eastern Pacific Ocean

2015 ◽  
Vol 162 (3) ◽  
pp. 571-593 ◽  
Author(s):  
Leanne M. Duffy ◽  
Robert J. Olson ◽  
Cleridy E. Lennert-Cody ◽  
Felipe Galván-Magaña ◽  
Noemi Bocanegra-Castillo ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Foraging Ecology ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Eastern Pacific Ocean ◽  
Carcharhinus Falciformis ◽  
Purse Seine Fishery

Spatial segregation of striped marlin ( Kajikia audax ) by size in the eastern Pacific Ocean

2018 ◽  
Vol 28 (2) ◽  
pp. 203-211
Author(s):  
Tatiana A. Acosta‐Pachón ◽  
Mariana L. Muzquiz‐Villalobos ◽  
Sofia Ortega‐García ◽  
Raúl O. Martínez‐Rincón
Keyword(s):  
Pacific Ocean ◽  
Spatial Segregation ◽  
Eastern Pacific ◽  
Eastern Pacific Ocean

Studying small purse-seine vessel fishing behavior with tuna catch data: Implications for eastern Pacific Ocean dolphin conservation

2012 ◽  
pp. n/a-n/a
Author(s):  
Cleridy E. Lennert-Cody ◽  
Jeremy D. Rusin ◽  
Mark N. Maunder ◽  
Edward H. Everett ◽  
Erick D. Largacha Delgado ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Eastern Pacific Ocean ◽  
Catch Data ◽  
Fishing Behavior

scholarly journals Increasing the economic value of the eastern Pacific Ocean tropical tuna fishery: Tradeoffs between longline and purse-seine fishing

2019 ◽  
Vol 169-170 ◽  
pp. 104621 ◽  
Author(s):  
Chin-Hwa Sun (Jenny) ◽  
Mark N. Maunder ◽  
Minling Pan ◽  
Alexandre Aires-da-Silva ◽  
William H. Bayliff ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Economic Value ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Eastern Pacific Ocean ◽  
Tropical Tuna ◽  
Tuna Fishery

Assessing vulnerability of bycatch species in the tuna purse-seine fisheries of the eastern Pacific Ocean

2019 ◽  
Vol 219 ◽  
pp. 105316 ◽  
Author(s):  
Leanne M. Duffy ◽  
Cleridy E. Lennert-Cody ◽  
Robert J. Olson ◽  
Carolina V. Minte-Vera ◽  
Shane P. Griffiths
Keyword(s):  
Pacific Ocean ◽  
Eastern Pacific ◽  
Purse Seine ◽  
Eastern Pacific Ocean
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