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Extreme diving of females at the largest colony of New Zealand sea lions, Phocarctos hookeri

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Abstract

The diving behaviours of marine predators are thought to be coupled with species demographics. Species that forage at or close to their physiological limits will be limited in their ability to respond to natural or anthropogenic induced changes in their environment. This is the case for the New Zealand sea lion (Phocarctos hookeri). A previous study from Enderby Island, Auckland Islands, the third largest colony for the endangered species, showed lactating females exhibit extreme diving behaviour, and that individuals have either: a benthic diving ecotype or a deeper, more varied mesopelagic diving ecotype which are maintained throughout their adult life. The ecological significance and implications for individual foraging specialisation has major consequences for this species as mesopelagic foragers are more likely to suffer mortality from fisheries than benthic foragers. We investigated the diving behaviour of lactating females from Dundas Island, Auckland Islands, the largest breeding colony for New Zealand sea lions. The diving behaviour of 24 lactating females was examined and confirmed that both diving ecotypes exist and that females at this colony are also operating at the upper limit of their physiological capability. Enderby and Dundas Island are the largest breeding colonies for the New Zealand sea lion and together represent 69% of this species pup production. This population has significantly declined since 1998, predominantly due to direct and indirect fisheries interactions. Measurable conservation and management steps are therefore critical to mitigate the impacts of fisheries on this population.

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References

  • Araújo MS, Bolnick DI, Layman CA (2011) The ecological causes of individual specialisation. Ecol Lett 14:948–958. https://doi.org/10.1111/j.1461-0248.2011.01662.x

    Article  PubMed  Google Scholar 

  • Arnould JPY, Costa DP (2006) Sea lions in drag, fur seals incognito: insights from the Otariid deviants. In: Trites AW, DeMaster DP, Fritz LW, Gelatt LD, Rea LD, Wynne KM (eds) Sea lions of the world. Alaska Sea Grant College Program, University of Alaska, Fairbanks, pp 111–125

    Google Scholar 

  • Augé AA, Chilvers BL, Moore AB, Davis LS (2011) Foraging behaviour indicates marginal marine habitat for New Zealand sea lions: remnant versus recolonising populations. Mar Ecol Prog Ser 432:247–256

    Google Scholar 

  • Boyd IL, Croxall JP (1996) Dive duration in pinnipeds and sea birds. Can J Zool 74:1696–1705

    Google Scholar 

  • Boyd IL, Staniland IJ, Martin AR (2002) Distribution of foraging by female Antarctic fur seals. Mar Ecol Prog Ser 242:285–294

    Google Scholar 

  • Campagna C, Werner R, Karesh W, Marin MR, Koontz F, Cook R, Koontz C (2001) Movements and locations at sea of South American sea lions (Otaria flavescens). J Zool (Lond) 257:205–220

    Google Scholar 

  • 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

    Google Scholar 

  • Childerhouse SJ, Dawson SM, Fletcher DJ, Slooten E, Chilvers BL (2010) Growth and reproduction of female New Zealand sea lions. J Mamm 91:165–176

    Google Scholar 

  • Chilvers BL (2008) Foraging site fidelity of lactating New Zealand sea lions. J Zool (Lond) 276:28–36

    Google Scholar 

  • Chilvers BL (2009) Foraging locations of a decreasing colony of New Zealand sea lions (Phocarctos hookeri). NZ J Ecol 33:106–113

    Google Scholar 

  • Chilvers BL (2012) Population viability analysis of New Zealand sea lions, Auckland Islands, New Zealand’s sub- Antarctics: assessing relative impacts and uncertainty. Polar Biol 35:1607–1615

    Google Scholar 

  • Chilvers BL (2015) Phocarctos hookeri. In: IUCN Red List of Threatened Species, version 2015.2. www.iucnredlist.org. Accessed 29 Sept 2020

  • Chilvers BL (2017a) Stable isotope signatures of whisker and blood serum confirm foraging strategies for female New Zealand sea lions derived from telemetry. Can J Zool 95:955–963

    CAS  Google Scholar 

  • Chilvers BL (2017b) Preliminary assessment of the foraging behaviour and population dynamics of a cryptic population of the endangered New Zealand sea lion. NZ J Ecol 42:48–57

    Google Scholar 

  • Chilvers BL (2019) Whisker stable isotope values indicate long-term foraging strategies for female New Zealand sea lions. Endanger Species Res 38:55–66

    Google Scholar 

  • Chilvers BL, Wilkinson IS (2009) Divers foraging strategies in lactating New Zealand sea lions. Mar Ecol Prog Ser 378:299–308

    Google Scholar 

  • Chilvers BL, Meyer S (2017) Conservation needs for the endangered New Zealand sea lion. Aquat Conserv 27:846–855

    Google Scholar 

  • 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

    Google Scholar 

  • Chilvers BL, Wilkinson IS, Duignan PJ, Gemmell N (2006) Diving to extremes: are New Zealand sea lions (Phocarctos hookeri) pushing their limits in a marginal habitat? J Zool (Lond) 269:233–241

    Google Scholar 

  • Chilvers BL, Wilkinson IS, Childerhouse S (2007) New Zealand sea lion, Phocarctos hookeri, pup production—1995 to 2005. NZ J Mar Freshw Res 41:205–213

    Google Scholar 

  • Chilvers BL, Robertson BC, Wilkinson IS, Duignan PJ (2007) Growth and survival of New Zealand sea lions, Phocarctos hookeri: birth to 3 months. Polar Biol 30:459–469

    Google Scholar 

  • Chilvers BL, Wilkinson IS, MacKenzie DI (2010) Predicting life-history traits for female New Zealand sea lions, Phocarctos hookeri: integrating short-term mark-recapture data and population modelling. J Agric Biol Environ Stat 15:259–278

    Google Scholar 

  • Chilvers BL, Amey JM, Huckstadt LA, Costa DP (2011) Investigating foraging utilization distribution of female New Zealand sea lions. Polar Biol 34:565–574

    Google Scholar 

  • Collins CJ, Rawlence NJ, Prost S, Anderson CNK, Knapp M, Scofield RP, Robertson BC, Smith I, Matisoo-Smith EA, Chilvers BL, Waters JM (2014) Extinction and recolonization of coastal megafauna following human arrival in New Zealand. Proc R Soc B 281(1786):20140097

    PubMed  PubMed Central  Google Scholar 

  • Costa DP, Gales NJ (2000) Foraging energetic and diving behaviour of lactating New Zealand sea lions, Phocarctos hookeri. J Exp Biol 203:3655–3665

    CAS  PubMed  Google Scholar 

  • 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

    Google Scholar 

  • Costa DP, Gales NJ, Crocker DE (1998) Blood volume and diving ability of the New Zealand sea lions, Phocarctos hookeri. Physiol Zool 71:208–213

    CAS  PubMed  Google Scholar 

  • Costa DP, Gales NJ, Goebel ME (2001) Aerobic dive limit: how often does it occur in nature? Comp Biochem Physiol 129:771–783

    CAS  Google Scholar 

  • Costa DP, Weise MJ, Arnould JPY (2006) Worldwide pinniped population status and trends. In: Estes J, Williams TM, Doak D, DeMaster D (eds) Whales, whaling, and ocean ecosystems. University of California Press, Berkeley, pp 342–359

    Google Scholar 

  • Crocker DE, Gales NJ, Costa DP (2001) Swimming speed and foraging strategies of New Zealand sea lions (Phocarctos hookeri). J Zool (Lond) 254:267–277

    Google Scholar 

  • Eberhardt LL (2002) A paradigm for population analysis of long-lived vertebrates. Ecology 83:2841–2854

    Google Scholar 

  • Feldkamp SD, Long RL, Antonelis GA (1989) Diving patterns of California sea lions, Zalophus californianus. Can J Zool 67:872–883

    Google Scholar 

  • Fowler SL, Costa DP, Arnould JPY, Gales NJ, Burns JM (2007) Ontogeny of oxygen stores and physiological diving capability in Australian sea lions. Funct Ecol 21:922–935

    Google Scholar 

  • Gales NJ, Mattlin RH (1997) Summer diving behaviour of lactating New Zealand sea lions, Phocarctos hookeri. Can J Zool 75:1695–1706

    Google Scholar 

  • Gales NJ, Mattlin RH (1998) Fast, safe, field-portable gas anesthesia for pinnipeds. Mar Mamm Sci 14:355–361

    Google Scholar 

  • Goebel ME (1998) Female foraging behavior: inter- and intraannual variation in individuals. In: Gentry RL (ed) Behavior and ecology of the northern fur seal. Princeton University Press, Princeton, pp 243–259

    Google Scholar 

  • Goebel ME, Bengston JL, Delong RL, Gentry RL, Loughlin TR (1991) Diving patterns and foraging locations of female northern fur seals. Fish Bull 89:171–179

    Google Scholar 

  • Heithaus MR, Frid A, Wirsing AJ, Worm B (2008) Predicting ecological consequences of marine top predator declines. Trends Ecol Evol 2:202–210

    Google Scholar 

  • Heppel SS, Caswell H, Crowder LB (2000) Life histories and elasticty patterns: perturbation analysis for species with minimal demographic data. Ecology 81:654–665

    Google Scholar 

  • Jones KA, Ratcliffe N, Votier SC, Newton J, Forcada J, Dickens J, Stowasser G, Staniland IJ (2020) Intra-specific niche partitioning in Antarctic fur seals, Arctocephalus gazella. Sci Rep 10:3238. https://doi.org/10.1038/s41598-020-59992-3

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Kirkman SP, Costa DP, Harrison A-L, Kotze PGH, Oosthuizen WH, Weise M, Botha JA, Arnould JPY (2019) Dive behaviour and foraging effort of female Cape fur seals Arctocephalus pusillus pusillus. R Soc Open Sci 6:191369. https://doi.org/10.1098/rsos.191369

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  • Kovacs KM, Aguilar A, Aurioles D, Burkanov V, Campagna C, Gales N, Gelatt T, Goldsworthy SD, Goodman SJ, Hofmeyr GJG, Härkönen T, Lowry L, Lydersen C, Schipper J, Sipilä T, Southwell C, Stuart S, Thompson D, Trillmich F (2012) Global threats to pinnipeds. Mar Mamm Sci 28:414–436

    Google Scholar 

  • Lent R, Squires D (2017) Reducing marine mammal bycatch in global fisheries: an economics approach. Deep-Sea Res II 140:268–277

    Google Scholar 

  • Leung ES, Chilvers BL, Nakagawa S, Robertson BC (2014a) Do yearling New Zealand sea lions (Phocarctos hookeri) learn foraging behaviour from their mothers? Mar Mamm Sci 30:1220–1228

    Google Scholar 

  • Leung ES, Chilvers BL, Nakagawa S, Robertson BC (2014b) Size and experience matter: diving behaviour of juvenile New Zealand sea lions (Phocarctos hookeri). Polar Biol 37:15–26

    Google Scholar 

  • Luque SP, Fried R (2011) Recursive filtering for zero offset correction of diving depth time series with GNU R package diveMove. PLoS ONE 6(1):e15850

    CAS  PubMed  PubMed Central  Google Scholar 

  • McHuron EA, Peterson SH, Hückstädt LA, Melin SR, Harris JD, Costa DP (2018) The energetic consequences of behavioral variation in a marine carnivore. Ecol Evol 8:4340–4351. https://doi.org/10.1002/ece3.3983

    Article  PubMed  PubMed Central  Google Scholar 

  • Melidonis B, Childerhouse S (2020) New Zealand Sea Lion (Rāpoka) monitoring on the Auckland Islands for the 2019/20 Season: Field Research Report. Department of Conservation, p 23

  • Meyer S, Robertson BC, Chilvers BL, Krkosek M (2015) Population dynamics reveal conservation priorities of the threatened New Zealand sea lion Phocarctos hookeri. Mar Biol 162:1587–1596

    Google Scholar 

  • Meyer S, Robertson BC, Chilvers BL, Krkosek M (2017) Marine mammal population decline linked to obscured by-catch. Proc Natl Acad Sci USA 114:11781–11786

    CAS  PubMed  PubMed Central  Google Scholar 

  • Meynier L, MacKenzie DDS, Duignan PJ, Chilvers BL, Morel PCH (2009) Variability in the diet of New Zealand sea lion (Phocarctos hookeri) at the Auckland Islands, New Zealand. Mar Mamm Sci 25:302–326

    Google Scholar 

  • Meynier L, Morel PCH, Chilvers BL, Mackenzie DDS, Duignan PJ (2014) Foraging diversity in lactating New Zealand sea lions: insights from qualitative and quantitative fatty acid analysis. Can J Fish Aquat Sci 71:984–991

    CAS  Google Scholar 

  • Mills SL (2012) Conservation of wildlife populations: demography, genetics, and management, 2nd edn. Wiley, Missoula

    Google Scholar 

  • Patrick SC, Pinaud D, Weimerskirch H (2017) Boldness predicts an individual’s position along an exploration–exploitation foraging trade-off. J Anim Ecol 86:1257–1268. https://doi.org/10.1111/1365-2656.12724

    Article  PubMed  PubMed Central  Google Scholar 

  • Ponganis PJ, Ponganis EP, Ponganis KV, Kooyman GL, Gentry RL, Trillmich F (1990) Swim velocities in otariids. Can J Zool 68:2105–2112

    Google Scholar 

  • Read AJ, Drinker P, Northridge S (2006) Bycatch of marine mammals in U.S. and global fisheries. Conserv Biol 20:163–169

    PubMed  Google Scholar 

  • Robertson, (2015) Is management limiting the recovery of the New Zealand sea lion Phocarctos hookeri?. Polar Biol. https://doi.org/10.1007/s00300-014-1619-2

    Article  Google Scholar 

  • Robertson BC, Chilvers BL (2011) The population decline of New Zealand sea lions Phocarctos hookeri: a review of possible causes. Mamm Rev 41:253–275

    Google Scholar 

  • Staniland IJ, Robinson SL (2008) Segregation between the sexes: Antarctic fur seals, Arctocephalus gazella, foraging at South Georgia. Anim Behav 75:1581–1590

    Google Scholar 

  • Staniland IJ, Gales N, Warren LN, Robinson SL, Goldsworthy SD, Casper RM (2010) Geographical variation in the behaviour of a central place forager: Antarctic fur seals foraging in contrasting environments. Mar Biol 157:2383–2396

    Google Scholar 

  • Tinker MT, Bentall G, Estes JA (2008) Food limitation leads to behavioral diversification and dietary specilization in sea otters. Proc Natl Acad Sci 105:560–565

    CAS  PubMed  PubMed Central  Google Scholar 

  • Tremblay Y, Cherel Y (2000) Benthic and pelagic dives: a new foraging behaviour in rockhopper penguins. Mar Ecol Prog Ser 204:257–267

    Google Scholar 

  • Villegas-Amtmann S, Costa DP (2010) Oxygen stores plasticity linked to foraging behaviour and pregnancy in a diving predator, the Galapagos sea lion. Func Ecol 24:785–795

    Google Scholar 

  • Villegas-Amtmann S, Costa DP, Tremblay Y, Salazar S, Aurioles-Gamboa D (2008) Multiple foraging strategies in a marine apex predator, the Galapagos sea lion, Zalophus wollebaeki. Mar Ecol Prog Ser 363:299–309

    Google Scholar 

  • Villegas-Amtmann S, Simmons SE, Kuhn CE, Huckstadt LA, Costa DP (2011) Latitudinal range influences the seasonal variation in the foraging behavior of marine top predators. PLoS ONE 6:e23166

    CAS  PubMed  PubMed Central  Google Scholar 

  • Villegas-Amtmann S, Atkinson S, Paras-Garcia A, Costa DP (2012) Seasonal variation in blood and muscle oxygen stores attributed to diving behavior, environmental temperature and pregnancy in a marine predator, the California sea lion. Comp Biochem Physiol A 162:413–420

    CAS  Google Scholar 

  • Villegas-Amtmann S, Jeglinski JW, Costa DP, Robinson PW, Trillmich F (2013) Individual foraging strategies reveal niche overlap between endangered galapagos pinnipeds. PLoS ONE 8:e70748

    CAS  PubMed  PubMed Central  Google Scholar 

  • Werner R, Campagna C (1995) Diving behaviour of lactating southern sea lions (Otaria flavescens) in Patagonia. Can J Zool 73:1975–1982

    Google Scholar 

  • Würsig B, Thewissen JGM, Kovacs KM (2018) Encyclopaedia of marine mammals, 3rd edn. Academic Press, Cambridge

    Google Scholar 

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Acknowledgements

This data was collected under funding from the New Zealand Department of Conservation (DOC—Investigation no. 1638) in parallel with field work undertaken for DOC Conservation Services Programme (www.csp.org.nz) project POP2006/01. DOC Southland are thanked for their logistical assistance. We also thank M. Blake, M. Brown, S. Childerhouse, J. Fyfe, K. Geschke, R. Hood, and L. Meyner for assistance with captures in the field. Approval for work was obtained from DOC Animal Ethics Committee—Approval AEC86 (1 July 1999). We thank the editor Dieter Piepenburg and reviewers, Elizabeth McHuron and two anonymous reviewers for their useful comments on the manuscript.

Funding

This data was collected under funding from the New Zealand Department of Conservation (DOC—Investigation no. 1638) in parallel with field work undertaken for DOC Conservation Services Programme (www.csp.org.nz) project POP2006/01.

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Authors and Affiliations

  1. Wildbase, School of Veterinary Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand

    B. Louise Chilvers

  2. Department of Conservation, P.O. Box 50, Haast, 784, New Zealand

    Jacinda M. Amey

  3. Institute of Marine Sciences and Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA, 95060, USA

    Daniel P. Costa

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  1. B. Louise Chilvers
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Correspondence to B. Louise Chilvers.

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Approval for work was obtained from New Zealand Department of Conservation Animal Ethics Committee—Approval AEC86 (1 July 1999).

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Chilvers, B.L., Amey, J.M. & Costa, D.P. Extreme diving of females at the largest colony of New Zealand sea lions, Phocarctos hookeri. Polar Biol 43, 2031–2042 (2020). https://doi.org/10.1007/s00300-020-02763-7

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