New Zealand sea lions Phocarctos hookeri and squid trawl fisheries: Bycatch problems and management options

Endangered Species Research

Volumn 5, Issue 2-3, 2008, Pages 193-204

  Chilvers, B Louise ^a  

^a DEPARTMENT OF CONSERVATION   (New Zealand)

Author keywords

Fisheries interactions; Management; Marine mammal protected area; New Zealand sea lions; Phocarctos hookeri

Indexed keywords

BREEDING SITE; BYCATCH; ENDANGERED SPECIES; ENDANGERED SPECIES ACT; PINNIPED; POPULATION DECLINE; PROTECTED AREA; REPRODUCTIVE SUCCESS; SPECIES CONSERVATION; TRAWLING;

AUSTRALASIA; NEW ZEALAND;

CEPHALOPODA; MAMMALIA; NOTOTODARUS SLOANII; OMMASTREPHIDAE; OTARIIDAE; PHOCARCTOS HOOKERI; PINNIPEDIA;

EID: 77951880113     PISSN: 18635407     EISSN: 16134796     Source Type: Journal    
DOI: 10.3354/esr00086     Document Type: Review

References (65)

1. Annala J (1996) New Zealand's ITQ system: have the first 8 years been a success or failure? Rev Fish Biol Fish 6:43-62
2. Arnould JPY, Trinder DM, McKinley CP (2003) Interactions between fur seals and a squid jig fishery in southern Australia. Mar Freshw Res 54:979-984
3. Baird SJ (1994) Nonfish Species and Fisheries Interactions Working Group Report. New Zealand Fisheries Assessment Working Group Report 94/1. Ministry of Fisheries, Wellington
4. Baird SJ (1996) Nonfish Species and Fisheries Interactions Working Group Report - May 1996. New Zealand Fisheries Assessment Working Group Report 96/1. Ministry of Fisheries, Wellington
5. Baird SJ (1999) Estimation of nonfish bycatch in commercial fisheries in New Zealand waters, 1997-98. Ministry of Fisheries Project ENV9801. Ministry of Fisheries, Wellington
6. Baird SJ (2005a) Incidental capture of Phocarctos hookeri (New Zealand sea lions) in New Zealand commercial fisheries, 2001-02. New Zealand Fisheries Assessment Report 8:17. Ministry of Fisheries, Wellington
7. Baird SJ (2005b) Incidental capture of Phocarctos hookeri (New Zealand sea lions) in New Zealand commercial fisheries, 2002-03. New Zealand Fisheries Assessment Report 9:13-30. Ministry of Fisheries, Wellington
8. Baird SJ, Doonan IJ (2005) Phocarctos hookeri (New Zealand sea lions): incidental captures in New Zealand commercial fisheries during 2000-01 and in-season estimates of captures during squid trawling in SQU 6T in 2002. New Zealand Fisheries Assessment Report 2005:18-35. Ministry of Fisheries, Wellington
9. Baker A (1999) Unusual mortality of the New Zealand sea lion, Phocarctos hookeri, Auckland Islands, January-February 1998. Department of Conservation, Wellington
10. Barton J (2002) Fisheries and fisheries management in Falkland Islands Conservation Zones. Aquat Conserv: Mar Freshw Ecosyst 12:127-135
11. Boness DJ, Oftedal OT, Ono KA (1991) The effects of El Niño on pup development in the California sea lion. 1. Early postnatal growth. In: Trillmich F, Ono KA (eds) Pinnipeds and El Niño: Responses to environmental stress. Springer-Verlag, New York, p 180-184
12. Boyd IL (1992) Steller sea lion research. Report to the National Marine Fisheries Service, National Marine Mammal Laboratory, Seattle, WA
13. Boyd IL, Croxall JP (1996) Dive duration in pinnipeds and sea birds. Can J Zool 74:1696-1705
14. Boyd IL, Arnould JPY, Barton T, Croxall JP (1994) Foraging behaviour of Antarctic fur seals during periods of contrasting prey abundance. J Anim Ecol 63:703-713
15. Boyd IL, McCafferty DJ, Walker TR (1997) Variation in foraging effort by lactating Antarctic fur seals: response to simulated increased foraging costs. Behav Ecol Sociobiol 40:135-144
16. Boyd IL, McCafferty DJ, Reid K, Taylor R, Walker T (1998) Dispersal of male and female Antarctic fur seals (Arctocephalus gazella). Can J Fish Aquat Sci 55:845-852
17. Bradford-Grieve JM, Probert PK, Nodder SD, Thompson D and others (2003) Pilot trophic model for subantarctic water over the Southern Plateau, New Zealand: a low biomass, high transfer efficiency system. J Exp Mar Biol Ecol 289:223-262
18. Brasted J (1991) New Zealand seafood manual. New Zealand Fishing Industry Board, Wellington
19. Breen PA, Hilborn R, Maunder MN, Kim SW (2003) Effects of alternative control rules on the conflict between a fishery and a threatened sea lion (Phocarctos hookeri). Can J Fish Aquat Sci 60:527-541
20. Calkins DG, Pitcher KW (1982) Population assessment, ecology and trophic relationships of Steller sea lions in the Gulf of Alaska. Environmental assessment of the Alaskan continental shelf. Final Reports of Principle Investigators, Vol 19. National Oceanic and Atmospheric Administration, Juneau, AK, p 447-546
21. Campagna C, Werner R, Karesh W, Marin MR, Koontz F, Cook R, Koontz C (2001) Movements and location at sea of South American sea lions ( Otaria flavescens). J Zool (Lond) 255:205-220
22. Campbell RA, Chilvers BL, Childerhouse S, Gales NJ (2006) Conservation management issues and status of the New Zealand (Phocarctos hookeri) and Australian (Neophoca cinerea) sea lions. In: Trites AW, DeMaster DP, Fritz LW, Gelatt LD, Rea LD, Wynne KM (eds) Sea lions of the world. Lowell Wakefield Fisheries Symposium, Anchorage, AK, p 455-471
23. Cappozzo HL, Campagna C, Monserrat J (1991) Sexual dimorphism in newborn Southern sea lions. Mar Mamm Sci 7:385-394
24. Childerhouse S, Gales N (1998) Historical and modern distribution and abundance of the New Zealand sea lion, Phocarctos hookeri. NZ J Zool 25:1-16
25. Childerhouse S, Dix B, Gales NJ (2001) Diet of New Zealand sea lions ( Phocarctos hookeri) at the Auckland Islands. Wildl Res 28:291-298
26. Chilvers BL, Wilkinson IS, Duignan PJ, Gemmell NJ (2005) Summer foraging areas for lactating New Zealand sea lions Phocarctos hookeri. Mar Ecol Prog Ser 304:235-247
27. Chilvers BL, Wilkinson IS, Duignan PJ, Gemmell NJ (2006) Diving to extremes: are New Zealand sea lions pushing their limits in a marginal habitat? J Zool (Lond) 269:233-240
28. Chilvers BL, Wilkinson IS, Childerhouse S (2007a) New Zealand sea lion, Phocarctos hookeri, pup production - 1995 to 2005. NZ J Mar Freshw Res 41:205-213
29. Chilvers BL, Robertson BC, Wilkinson IS, Duignan PJ (2007b) Growth and survival of New Zealand sea lions, Phocarctos hookeri: birth to 3 months. Polar Biol 30:459-469
30. Costa DP, Gales NJ (2000) Foraging energetic and diving behaviour of lactating New Zealand sea lions, Phocarctos hookeri. J Exp Biol 203:3655-3665
31. Costa DP, Gales NJ (2003) Energetics of a benthic diver: seasonal foraging ecology of the Australian sea lion, Neophoca cinerea. Ecol Monogr 73:27-43
32. Doonan IJ, Cawthorn MW (1984) Impacts of incidental mortality on the Hookers sea lions. Internal report no. 6, Fisheries Research Division, New Zealand Ministry of Fisheries, Wellington
33. Duignan PJ (1999) Gross pathology, histopathology, virology, serology and parasitology. In: Baker A (ed) Unusual mortality of the New Zealand sea lion, Phocarctos hookeri, Auckland Islands, January-February 1998: A report of a workshop held 8-9 June 1998, Wellington, and a contingency plan for future events. Department of Conservation, Te Papa Atawhai, Wellington, p 29-33
34. Feldkamp SD, Long RL, Antonelis GA (1989) Diving patterns of California sea lions, Zalophus californianus. Can J Zool 67:872-883
35. Gales NJ (1995) New Zealand (Hooker's) sea lion recovery plan. Threatened Species Recovery Plan Series 17. Department of Conservation, Wellington
36. Gales NJ, Mattlin RH (1997) Summer diving behaviour of lactating New Zealand sea lions, Phocarctos hookeri. Can J Zool 75:1695-1706
37. Gentry RL, Kooyman GL, Goebel ME (1986) Feeding and diving behaviour of northern fur seals. In: Gentry RL, Kooyman GL (eds) Fur seals: maternal strategies on land and at sea. Princeton University Press, Princeton, NJ, p 61-78
38. Goodman-Lowe GD, Carpenter JR, Atkinson S, Ako H (1999) Nutrient, fatty acid, amino acid and mineral analysis of natural prey of the Hawaiian monk seal, Monachus schauinslandi. Comp Biochem Physiol A 123:137-146
39. Hennen D (2006) Associations between the Alaska Steller sea lion decline and commercial fisheries. Ecol Appl 16: 704-717
40. Higgins LV, Gass L (1993) Birth to weaning parturition, duration of lactation, and attendance cycles of Australian sea lions (Neophoca cinerea). Can J Zool 71:2047-2055
41. Higgins LV, Costa DP, Huntley AC, Leboeuf BJ (1988) Behaviour and physiological measurements of maternal investment in the Steller sea lion, Eumetopias jubatus. Mar Mamm Sci 4:44-58
42. Hitchmough RA (2002) New Zealand threat classification systems list 2002. Department of Conservation. Threatened Species Occasional Publication 23, Wellington
43. Hooker SA, Gerber LR (2004) Marine reserves as a tool for ecosystem-based management: the potential importance of megafauna. Bioscience 54:27-39
44. McConkey SD, McConnell H, Lalas C, Heinrich S and others (2002) A northward spread in the breeding distribution of the New Zealand sea lion, Phocarctos hookeri. Aust Mammal 24:97-106
45. Melin SR (2002) The foraging ecology and reproduction of the California sea lion (Zalophus californianus californianus). PhD thesis, University of Minnesota, St. Paul, MN
46. Ministry of Fisheries (2006) 2006-07 SQU 6T sea lion operational plan initial position paper. Available at: www.fish.govt.nz/NR/rdonlyres/ 0E87E979-88A9-443A-9F13-8CB7FEAF8A23/0/Vol2Part2.pdf
47. Pitcher KW, Calkins DG (1981) Reproductive biology of Steller sea lions in the Gulf of Alaska. J Mammal 62: 599-605
48. Ponganis PJ, Ponganis EP, Ponganis KV, Kooyman GL, Gentry RL, Trillmich F (1990) Swim velocities in otariids. Can J Zool 68:2105-2112
49. Reeves RR (2000) The value of sanctuaries, parks and reserves (protected areas) as tools of conserving marine mammals. Hudson (Canada): Okapi Wildlife Associates. Final Report Marine Mammal Commission. Available at: www.mmc.gov/reports/contract/pdf/mpareport.pdf
50. Reijnders P, Brasseur S, van der Toorn J, van der Wolf P and others (1993) Seals, fur seals, sea lions and walrus, status survey and conservation plan. IUCN Seal Specialist Group. IUCN, Gland
51. Riet-Sapriza F (2007) Milk composition of the New Zealand sea lion and factors that influence it. PhD thesis, Massey University, Palmerston North
52. Robertson BC, Chilvers BL, Duignan PJ, Wilkinson IS, Gemmell NJ (2005) Dispersal of breeding, adult male Phocarctos hookeri: implications for disease transmission, population management and species recovery. Conserv Biol 127:227-236
53. Rosen DAS, Trites AW (2000) Digestive efficiency and drymatter digestibility in Steller sea lions fed herring, pollock, squid, and salmon. Can J Zool 78:234-239
54. Sauer WHH (1995) The impact of fishing on chokka squid, Loligo vulgaris reynaudii, concentrations on inshore spawning grounds in the south-eastern cape, South Africa. S Afr J Mar Sci 16:185-193
55. Schulz TM, Bowen WD (2004) Pinniped lactation strategies: evaluation of data on maternal and offspring life history traits. Mar Mamm Sci 20:86-114
56. Smith MH, Baird SJ (2005) Factors that may influence the level of incidental mortality of Hooker's sea lions (Phocarctos hookeri) in the squid (Nototodarus spp.) trawl fishery in SQU 6T. New Zealand Fisheries Assessment Report 2005:35-56
57. Thrush SF, Dayton PK (2002) Disturbance to marine benthic habitats by trawling and dredging: Implications for marine biodiversity. Annu Rev Ecol Syst 33:449-473
58. Uozumi Y (1998) Fishery biology of arrow squids, Nototodarus gouldi, and N. sloanii, in New Zealand waters. Bull Nat Res Inst Far Seas Fish 35:1-111
59. Wade PR (1998) Calculating limits to the allowable human-caused mortality of cetaceans and pinnipeds. Mar Mamm Sci 14:1-37
60. Watling L, Norse EA (1998) Disturbance of the seabed by mobile fishing gear: A comparison to forest clearcutting. Conserv Biol 12:1180-1197
61. Whitelaw AW (2002) AFMA observer program - Report on the southern squid jig fishery seal project. Observer Program, Australian Fisheries Management Authority, Canberra
62. Wilkinson IS, Burgess J, Cawthorn MW (2003) New Zealand sea lions and squid - managing fisheries impacts on a threatened marine mammal. In: Gales N, Hindell M, Kirkwood R (eds) Marine mammals: Fisheries, tourism and management issues. CSIRO Publishing, Melbourne, p 192-207
63. Wilkinson IS, Duignan PJ, Grinberg A, Chilver BL, Robertson BC (2006) Klebsiella pneumoniae epidemics: possible impact on New Zealand sea lion recruitment. In: Trites AW, DeMaster DP, Fritz LW, Gelatt LD, Rea LD, Wynne KM (eds) Sea lions of the world. Lowell Wakefield Fisheries Symposuim, Alaska, p 455-471
64. Woodley TH, Lavigne DM (1993) Potential effects of incidental mortalities on the Hooker's sea lions (Phocarctos hookeri) population. Aquat Conserv: Mar Freshw Ecosyst 3: 139-148
65. York AE (1994) The population dynamics of Northern sea lions, 1975-1985. Mar Mamm Sci 10:38-51