Polar Biology

, Volume 32, Issue 2, pp 187–196

Seabird bycatch in the Southwest Atlantic: interaction with the Uruguayan pelagic longline fishery

  • Sebastián Jiménez
  • Andrés Domingo
  • Alejandro Brazeiro
Original Paper

Abstract

This paper analyzes the spatiotemporal variation and the causes of seabird bycatch by the Uruguayan pelagic longline fleet in a region of the Atlantic Ocean where the world’s highest historical rates of seabird bycatch were recorded. The study is based on data obtained by the Uruguayan Observers Program in 29 trips, conducted from 1998 to 2004, totalling about 648,000 hooks. The bird capture per unit of effort (BCPUE) for the studied period was 0.42 birds/1,000 hooks. The highest BCPUE values were recorded in the period May–November. Three zones were identified, with BCPUEs of 2.50 birds/1,000 hooks (very high); 0.78 birds/1,000 hooks (high) and 0.04 birds/1,000 hooks (low). Though these BCPUE values are lower than those historically reported, some are still high in global terms. Night setting was found to be effective in reducing seabird bycatch, but it is necessary to implement additional measures as seabirds have access to bait also by night, especially during the more luminous moon phases.

Keywords

Seabirds Black-browed Albatross White-chinned Petrel Pelagic longline Bycatch Factors affecting mortality Uruguay Southwest Atlantic 

References

  1. Acha EM, Mianzan HW, Guerrero RA, Favero M, Bava J (2004) Marine fronts at the continental shelves of austral South America: Physical and ecological processes. J Mar Syst 44:83–105CrossRefGoogle Scholar
  2. Alexander K, Robertson G, Gales R (1997) The incidental mortality of Albatrosses in longline fisheries. Australian Antarctic Division, TasmaniaGoogle Scholar
  3. Barnes KN, Ryan PG, Boix-Hinzen C (1997) The impact of the hake Merluccius spp. Longline fishery off South Africa on Procellariiform seabirds. Biol Conserv 82:227–234CrossRefGoogle Scholar
  4. Belda EJ, Sánchez A (2001) Seabirds mortality on longline fisheries in the western Mediterranean: factors affecting bycatch and proposed mitigating measures. Bio Conserv 98:357–363CrossRefGoogle Scholar
  5. Berrow SD, Croxall JP, Grant SD (2000) Status of white-chinned petrels Procellaria aequinoctialis Linnaeus 1758, at Bird Island, South Georgia. Antarct Sci 12:399–405CrossRefGoogle Scholar
  6. BirdLife International (2008) Species factsheet. Available at: http://www.birdlife.org. Accessed 26 Jul 2008
  7. Breiman L, Friedman JH, Olshen RA, Stone CJ (1984) Classification and regression trees. Chapman and Hall, New YorkGoogle Scholar
  8. Brothers N (1991) Albatross mortality and associated bait loss in the Japanese fishery in the southern Ocean. Biol Conserv 55:255–268CrossRefGoogle Scholar
  9. Brothers NP, Cooper J, Løkkeborg S (1999a) The incidental catch of seabirds by longline fisheries: worldwide review and technical guidelines for mitigation. FAO Fisheries Circular No. 937, Food and Agriculture Organization of the United Nations, RomeGoogle Scholar
  10. Brothers NP, Gales R, Reid T (1999b) The influence of environmental variables and mitigation measures on seabird catch rates in the Japanese tuna longline fishery within the Australian Fishing Zone, 1991–1995. Biol Conserv 88:85–101CrossRefGoogle Scholar
  11. Carranza A, Domingo A, Estrades A (2006) Pelagic longlines: a threat to sea turtles in the Ecuatorial Eastern Atlantic. Biol Conserv 131:52–57CrossRefGoogle Scholar
  12. Croxall JP (1979) Distribution and population changes in the Wandering Albatross at South Georgia. Ardea 67:15–21Google Scholar
  13. Croxall JP, Prince PA (1990) Recoveries of Wandering Albatross Diomedea exulans ringed at South Georgia 1958–1986. Ringing Migr 11:43–51Google Scholar
  14. Croxall JP, Prince PA, Rothery P, Wood AG (1998) Populations changes in albatrosses at South Georgia. In: Robertson G, Gales R (eds) Albatross biology and conservation. Surrey Beatty, Chipping Norton, pp 69–83Google Scholar
  15. Cuthbert R, Phillips RA, Ryan PG (2003) Separating the Tristan Albatross and the Wandering Albatross using morphometric measurements. Waterbirds 26:338–344CrossRefGoogle Scholar
  16. Domingo A, Mora O, Cornes M (2002) Evolución de las capturas de elasmobranquios pelágicos en la pesquería de atunes de Uruguay, con énfasis en los tiburones Azul (Prionace glauca), Moro (Isurus oxyrinchus) y Porbeagle (Lamna nasus). Col Vol Sci Pap ICCAT 54:1406–1420Google Scholar
  17. Domingo A, Bugoni L, Prosdocimi L, Miller P, Laporta M, Monteiro DS, Estrades A, Alvareda D (2006a) El impacto generado por las pesquerías en las tortugas marinas en el Océano Atlántico sud occidental. WWF Programa Marino para Latino América y el caribe, San José, Costa RicaGoogle Scholar
  18. Domingo A, Sales G, Giffoni B, Miller F, Laporta M, Maurutto G (2006b) Captura incidental de tortugas marinas con palangre pelágico en el Atlántico Sur por las flotas de Brasil y Uruguay. Col Vol Sci Pap ICCAT 59:992–1002Google Scholar
  19. Escalante R (1970) Aves marinas del Río de la Plata y aguas vecinas de Océano Atlántico. Barreiro y Ramos S. A, MontevideoGoogle Scholar
  20. Favero M, Silva Rodríguez MP (2005) Estado actual y conservación de aves pelágicas que utilizan la plataforma continental argentina como área de alimentación. Hornero 20:95–110Google Scholar
  21. Favero M, Khatchikian CE, Arias A, Silva Rodríguez MP, Cañete G, Mariano-Jelicich R (2003) Estimates of seabirds by-catch along the Patagonian shelf by Argentine longline fishing vessels, 1999–2001. Bird Conserv Int 13:273–281CrossRefGoogle Scholar
  22. Gales R, Brothers N, Reid T (1998) Seabirds mortality in the Japanese tuna longline fishery around Australia, 1988–1995. Biol Conserv 86:37–56CrossRefGoogle Scholar
  23. Gandini PA, Frere E (2006) Spatial and temporal patterns in the bycatch of seabirds in the Argentinean longline fishery. Fish Bull 104:482–485Google Scholar
  24. Gómez-Laich A, Favero M (2007) Spatio-temporal variation in mortality rates of White-chinned Petrels Procellaria aequinoctialis interacting with longliners in the south-west Atlantic. Bird Conserv Int 17:359–366Google Scholar
  25. Gómez-Laich A, Favero M, Mariano-Jelicich R, Blanco G, Cañete G, Arias A, Silva Rodriguez P, Brachetta H (2006) Environmental and operational variability affecting the mortality of black-browed Albatrosses associated with long-liners in Argentina. Emu 106:21–28CrossRefGoogle Scholar
  26. Hall M, Alverson DL, Metuzals KI (2000) By-Catch: problems and Solutions. Mar Pollut Bull 41:204–219CrossRefGoogle Scholar
  27. Harrison P (1985) Seabirds, an identification guide. Houghston Mifflin Company, BostonGoogle Scholar
  28. Hazin FHV, Broadhurst MK, Amorim AF, Arfelli CA, Domingo A (2008) Catches of pelagic sharks by subsurface longline fisheries in the South Atlantic Ocean during the last century: a review of available data with emphasis on Uruguay and Brazil. In: Camhi M, Pikitch E, Babcock E (eds) Sharks of the Open Ocean. Blackwell, New YorkGoogle Scholar
  29. Huin N (2001) Census of the Black-browed albatross population of the Falkland Islands. Falklands Conservation, Falkland IslandsGoogle Scholar
  30. Lewison RL, Crowder LB, Read AJ, Freeman SA (2004) Understanding impacts of fisheries bycatch on marine megafauna. Trends Ecol Evol 19:598–604CrossRefGoogle Scholar
  31. Mora O, Domingo A (2006) La flota atunera uruguaya: evolución y tendencias (1981–2004). Col Vol Sci Pap ICCAT 59:608–614Google Scholar
  32. Narosky T, Yzurieta D (1993) Guía para la identificación de las aves de Argentina y Uruguay. Asociación Ornitológica del Plata, Buenos AiresGoogle Scholar
  33. Neves T, Olmos F (1998) Albatross mortality in fisheries off the coast of Brazil. In: Robertson G, Gales R (eds) Albatross biology and conservation. Surrey Beatty, Chipping Norton, pp 214–219Google Scholar
  34. Olmos F (2002) Non-breeding seabirds in Brazil: a review of bands recoveries. Ararajuba 10:31–42Google Scholar
  35. Onley D, Bartle S (1999) Identificación de aves marinas de los océanos del sur. Una guía para observadores científicos a bordo de buques pesqueros. Te Papa Press, Wellington, New ZealandGoogle Scholar
  36. Oravetz CA (1999) Reducción de la Captura Incidental en Pesquerías. In: Eckert KL, Bjorndal KA, Abreu-Grobois FA, Donnelly M (eds) Research and management techniques for the conservation of sea turtles. IUCN/SSC Marine Turtle Specialist Group Publication No 4, pp 217–222Google Scholar
  37. Phillips RA, Silk JRD, Croxall JP, Afanasyev V, Benett VJ (2005) Summer distribution and migration of nonbreeding albatrosses: individual consistencies and implications for conservation. Ecology 81:2386–2396CrossRefGoogle Scholar
  38. Phillips RA, Silk JRD, Croxall JP, Afanasyev V (2006) Year-round distribution of white-chinned petrels from South Georgia: Relationships with oceanography and fisheries. Biol Conserv 129:336–347CrossRefGoogle Scholar
  39. Piola AR, Campos EJD, Moller OO Jr, Charo M, Martinez C (2000) Subtropical Shelf Front off eastern South America. J Geophys Res 105:6565–6578CrossRefGoogle Scholar
  40. Prince PA, Wood AG, Barton T, Croxall JP (1992) Satellite tracking of wandering albatrosses (Diomedea exulans) in the South Atlantic. Antarct Sci 4:31–36Google Scholar
  41. Poncet S, Robertson G, Phillips RA, Lawton K, Phalan B, Trathan PN, Croxall JP (2006) Status and distribution of wandering, black-browed and grey-headed albatrosses breeding at South Georgia. Polar Biol 29:772–781CrossRefGoogle Scholar
  42. R Development Core Team (2007) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna. Available at: http://www.r-project.org/. Accessed 22 Sep 2008
  43. Reid TA, Lecoq M, Catry P (2007) The White-chinned Petrel Procellaria aequinoctialis population of the Falkland Island. Mar Ornithol 35:57–60Google Scholar
  44. Ripley B (2007) Tree: classification and regression trees. [R package version 1.0-26]. Available at: http://cran.r-project.org/web/packages/tree/. Accessed 22 Sep 2008
  45. Robertson CJR, Bell EA, Sinclair N, Bell BD (2003) Distribution of seabirds from New Zealand that overlap with fisheries worldwide. DOC Science for Conservation 233, Departament of Conservation, Wellington, New ZealandGoogle Scholar
  46. Rumboll MAE, Jehl JR Jr (1977) Observations on pelagic birds in the South Atlantic Ocean in the Austral Spring. San Diego Soc Nat Hist Trans 19:1–16Google Scholar
  47. Schiavini A, Frere E, Gandini P, García N, Crespo E (1998) Albatross-fisheries interactions in Patagonian shelf waters. In: Robertson G, Gales R (eds) Albatross biology and conservation. Surrey Beatty, Chipping Norton, pp 208–213Google Scholar
  48. Seco Pon JP, Gandini PA, Favero M (2007) Effect of longline configuration on seabird mortality in the Argentine semi-pelagic Kingclip Genypterus blacodes fishery. Fish Res 85:101–105CrossRefGoogle Scholar
  49. Seeliger U, Odebrecht C, Castello JP (1998) Os ecossitemas costeiro e marinho do extremo Sul do Brasil. Ecoscientia, Rio GrandeGoogle Scholar
  50. Stagi A, Vaz-Ferreira R, Marin Y, Joseph L (1998) The conservation of albatrosses in Uruguayan waters. In: Robertson G, Gales R (eds) Albatross biology and conservation. Surrey Beatty, Chipping Norton, pp 220–224Google Scholar
  51. Sullivan BJ, Reid TA, Pompert J, Enticott JW, Black AD (2004) Seabird mortality associated with Patagonian Toothfish (Dissostichus eleginoides) longliners in Falkland Island waters. Emu 104:317–325CrossRefGoogle Scholar
  52. Tickell WLN (1967) Movements of Black-browed and Grey-headed Albatrosses in the South Atlantic. Emu 66:357–367Google Scholar
  53. Thurston MH (1982) Ornithological observations in the South Atlantic Ocean and Weddell Sea, 1959–64. Br Antarct Survey Bull 55:77–103Google Scholar
  54. Tuck GN, Polacheck T, Bulman CM (2003) Spatio-temporal trends of longline fishing effort in the southern Ocean and implications for seabirds bycatch. Biol Conserv 114:1–27CrossRefGoogle Scholar
  55. Vaske T (1991) Seabirds mortality on longline fishing for tuna in the southern Brazil. Ciencia e Cultura 43:388–390Google Scholar
  56. Veit RR (1995) Pelagic communities of seabirds in the South Atlantic Ocean. Ibis 137:1–10CrossRefGoogle Scholar
  57. Vooren CM, Coelho L (2004) Captura incidental de aves oceânicas na pesca com espinhel de fundo. In: Haimovici M, Ávila da Silva AO, Rossi–Wongstschowski CLDB (eds) Prospecção pesqueira de espécies demersais com espinhel de fundo na Zona Econômica Exclusiva da Região Sudeste–Sul do Brasil. Serie Documentos Revizee–Score Sul, São Paulo, pp 85–90Google Scholar
  58. Vooren CM, Fernandes AC (1989) Guia de albatrozes y petréis do sul do Brasil. Sagra, Porto AlegreGoogle Scholar
  59. Weimerskirch H, Wilson RP (1992) When do wandering albatrosses Diomedea exulans forage? Mar Ecol Prog Ser 86:297–300CrossRefGoogle Scholar
  60. Weimerskirch H, Catard A, Prince PA, Cherel Y, Croxall JP (1999) Foraging white-chinned petrels Procellaria aequinoctialis at risk from the tropics to Antarctica. Biol Conserv 87:273–275CrossRefGoogle Scholar
  61. Zar JH (1999) Biostatistical analysis. Prentice Hall, New JerseyGoogle Scholar

Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Sebastián Jiménez
    • 1
    • 2
    • 3
  • Andrés Domingo
    • 1
    • 2
  • Alejandro Brazeiro
    • 3
  1. 1.Proyecto Albatros y Petreles – UruguayCanelonesUruguay
  2. 2.Departamento de Recursos PelágicosDirección Nacional de Recursos Acuáticos (DINARA)MontevideoUruguay
  3. 3.Departamento de Ecología, Facultad de CienciasUniversidad de la RepúblicaMontevideoUruguay

Personalised recommendations