Marine Biology

, Volume 143, Issue 2, pp 233–244 | Cite as

Habitat selection in a coastal dolphin species (Cephalorhynchus hectori)



Hector's dolphin (Cephalorhynchus hectori) is a small New Zealand delphinid with a coastal distribution. Within a strip of 1 km from shore, the present study quantified the habitat used by the dolphins (n=461 groups) over a 19-month period (216 field days with 966 survey hours) by recording the abiotic factors sea surface temperature (SST), water depth and water clarity. Resource selection functions were used to distinguish the properties of 461 "used" sites (dolphins present) from 425 "unused" sites (no dolphins present) in six different study areas. Most dolphins were encountered in waters <39 m depth, with <4 m Secchi disk visibility and >14°C temperature. The preference of Hector's dolphins for warm and turbid waters was tested using eight models. Water depth, water clarity, SST and the study area explained dolphin presence to a very significant degree (p<0.001), and the model allowed the creation of probability plots for a variety of combinations of the variables. Habitat selection by dolphins differed between study areas, particularly between east and west coasts, in summer (December–February) and winter (June–August). Dolphin abundance appeared to change seasonally in some study areas, possibly due to a more offshore distribution of their prey in the winter, with its lower SSTs. This was so especially in summer (the main reproductive season), when dolphins (frequently with calves) occupied shallow and turbid waters, whereas in winter less use was made of this habitat.


  1. Abrahams M, Kattenfeld M (1997) The role of turbidity as a constraint on predator–prey interactions in aquatic environments. Behav Ecol Sociobiol 40:169–174CrossRefGoogle Scholar
  2. Acevedo-Gutierrez A (1997) Group feeding in bottlenose dolphins at Isla cel Coco, Costa Rica: interspecific interactions with prey and other hunters. PhD thesis, Texas A&M University, College StationGoogle Scholar
  3. Ayling T, Cox GJ (1982) Collins' guide to the sea fishes of New Zealand. Collins, AucklandGoogle Scholar
  4. Baker AN (1978) The status of Hector's dolphin, Cephalorhynchus hectori (Van Beneden), in New Zealand waters. Rep Int Whal Comm 28:331–334Google Scholar
  5. Bräger S (1993) Diurnal and seasonal behavior patterns of bottlenose dolphins (Tursiops truncatus). Mar Mamm Sci 9:434–438Google Scholar
  6. Bräger S (1998) Behavioural ecology and population structure of Hector's dolphin (Cephalorhynchus hectori). PhD thesis, University of Otago, Dunedin, New ZealandGoogle Scholar
  7. Bräger S (1999) Association patterns in three populations of Hector's dolphin, Cephalorhynchus hectori. Can J Zool 77:13–18CrossRefGoogle Scholar
  8. Bräger S, Schneider K (1998) Near-shore distribution and abundance of dolphins along the West Coast of the South Island, New Zealand. NZ J Mar Freshw Res 32:105–112Google Scholar
  9. Bräger S, Dawson SM, Slooten E, Smith S, Stone GS, Yoshinaga A (2002) Site fidelity and along-shore range in Hector's dolphin, an endangered marine dolphin from New Zealand. Biol Conserv 108:281–287CrossRefGoogle Scholar
  10. Cawthorn MW (1988) Recent observations of Hector's dolphin, Cephalorhynchus hectori, in New Zealand. Rep Int Whal Comm Spec Issue 9:303–314Google Scholar
  11. Cockcroft VG, Peddemors VM (1990) Seasonal distribution and density of common dolphins Delphinus delphis off the south-east coast of southern Africa. S Afr J Mar Sci 9:371–377Google Scholar
  12. Cockcroft VG, Cliff G, Ross GJB (1989) Shark predation on Indian Ocean bottlenose dolphins Tursiops truncatus off Natal, South Africa. S Afr J Zool 24:305–310Google Scholar
  13. Condy PR, van Aarde RJ, Bester MN (1978) The seasonal occurrence and behaviour of killer whales, Orcinus orca, at Marion Island. J Zool (Lond) 184:449–464Google Scholar
  14. Constantine R, Visser I, Buurman D, Buurman R, McFadden B (1998) Killer whale (Orcinus orca) predation on dusky dolphins (Lagenorhynchus obscurus) in Kaikoura, New Zealand. Mar Mamm Sci 14:324–330Google Scholar
  15. Corkeron PJ (1990) Aspects of the behavioural ecology of inshore dolphins Tursiops truncatus and Sousa chinensis in Moreton Bay, Australia. In: Leatherwood S, Reeves RR (eds) The bottlenose dolphin. Academic, San Diego, pp 285–293Google Scholar
  16. Corkeron PJ, Morris RJ, Bryden MM (1987) Interactions between bottlenose dolphins and sharks in Moreton Bay, Queensland. Aquat Mamm 13:109–113Google Scholar
  17. Croll DA, Tershy BR, Hewitt RP, Demer DA, Fiedler PC, Smith SE, Armstrong W, Popp JM, Kiekhefer T, Lopez VR, Urban J, Gendron D (1998) An integrated approach to the foraging ecology of marine birds and mammals. Deep-Sea Res II 45:1353–1371CrossRefGoogle Scholar
  18. Cyrus DP, Blaber SJM (1987) The influence of turbidity on juvenile marine fishes in estuaries, part 1. Field studies at Lake St Lucia on the southeastern coast of Africa. J Exp Mar Biol Ecol 109:53–70Google Scholar
  19. Davis RW, Ortega-Ortiz JG, Ribic CA, Evans WE, Biggs DC, Ressler PH, Cady RB, Leben RR, Mullin KD, Würsig B (2002) Cetacean habitat in the northern oceanic Gulf of Mexico. Deep-Sea Res I 49:121–142CrossRefGoogle Scholar
  20. Dawson SM, Slooten E (1988) Hector's dolphin, Cephalorhynchus hectori: distribution and abundance. Rep Int Whal Comm Spec Issue 9:315–324Google Scholar
  21. Fiedler PC, Barlow J, Gerrodette T (1998) Dolphin prey abundance determined from acoustic backscatter data in eastern Pacific surveys. Fish Bull (Wash DC) 96:237–247Google Scholar
  22. Gaskin DE (1968) Distribution of Delphinidae (Cetacea) in relation to sea surface temperatures off eastern and southern New Zealand. NZ J Mar Freshw Res 2:527–534Google Scholar
  23. Gelwick FP, Stock MS, Matthews WJ (1997) Effects of fish, water depth, and predation risk on patch dynamics in a north-temperate river ecosystem. Oikos 80:382–398Google Scholar
  24. Goodall RNP, Würsig B, Würsig M, Harris G, Norris KS (1995) Sightings of Burmeister's porpoise, Phocoena spinipinnis, off southern South America. Rep Int Whal Comm Spec Issue 16:297–316Google Scholar
  25. Gowans S, Whitehead H (1995) Distribution and habitat partitioning by small odontocetes in the Gully, a submarine canyon on the Scotian Shelf. Can J Zool 73:1599–1608Google Scholar
  26. Harraway J (1995) Regression methods applied. University of Otago Press, Dunedin, New ZealandGoogle Scholar
  27. Heithaus MR (2001a) Predator–prey and competitive interactions between sharks (order Selachii) and dolphins (suborder Odontoceti): a review. J Zool (Lond) 253:53–68Google Scholar
  28. Heithaus MR (2001b) Shark attacks on bottlenose dolphins (Tursiops aduncus) in Shark Bay, Western Australia: attack rate, bite scar frequencies, and attack seasonality. Mar Mamm Sci 17:526–539Google Scholar
  29. Heithaus MR, Dill LM (2002) Food availability and tiger shark predation risk influence bottlenose dolphin habitat use. Ecology 83:480–491Google Scholar
  30. Jaquet N, Whitehead H (1996) Scale-dependent correlation of sperm whale distribution with environmental features and productivity in the South Pacific. Mar Ecol Prog Ser 135:1–9Google Scholar
  31. Jefferson TA, Stacey PJ, Baird RW (1991) A review of killer whale interactions with other marine mammals: predation to co-existence. Mamm Rev 21:151–180Google Scholar
  32. Jellyman DJ, Glova GJ, Sagar PM, Sykes JRE (1997) Spatio-temporal distribution of fish in the Kakanui River estuary, South Island, New Zealand. NZ J Mar Freshw Res 31:103–118Google Scholar
  33. Karczmarski L, Cockcroft VG, McLachlan A (2000) Habitat use and preferences of Indo-Pacific humpback dolphins Sousa chinensis in Algoa Bay, South Africa. Mar Mamm Sci 16:65–79Google Scholar
  34. Lasiak TA (1984) Structural aspects of the surf-zone fish assemblage at King's Beach, Algoa Bay, South Africa: long-term fluctuations. Estuar Coast Shelf Sci 18:459–483Google Scholar
  35. Lescrauwaet A-K (1997) Notes on the behaviour and ecology of the Peale's dolphin, Lagenorhynchus australis, in the Strait of Magellan, Chile. Rep Int Whal Comm 47:747–755Google Scholar
  36. Levin P, Petrik R, Malone J (1997) Interactive effects of habitat selection, food supply and predation on recruitment of an estuarine fish. Oecologia 112:55–63CrossRefGoogle Scholar
  37. Manly BFJ, McDonald LL, Thomas DL (1993) Resource selection by animals. Chapman and Hall, LondonGoogle Scholar
  38. Manly BFJ, McDonald LL, Garner GW (1996) Maximum likelihood estimation for the double-count method with independent observers. J Agric Biol Environ Stats 1:170–189Google Scholar
  39. Mann J, Connor RC, Barre LM, Heithaus MR (2000) Female reproductive success in bottlenose dolphins (Tursiops sp.): life history, habitat, provisioning, and group-size effects. Behav Ecol 11:210–219CrossRefGoogle Scholar
  40. Martien KK, Taylor BL, Slooten E, Dawson S (1999) A sensitivity analysis to guide research and management for Hector's dolphin. Biol Conserv 90:183–191CrossRefGoogle Scholar
  41. Maze KS, Würsig B (1999) Bottlenose dolphins of San Luis Pass, Texas: occurrence patterns, site-fidelity, and habitat use. Aquat Mamm 25:91–103Google Scholar
  42. McDowall RM (1990) New Zealand freshwater fishes. Heinemann Reed, AucklandGoogle Scholar
  43. Montero R, Arechavaleta M (1996) Distribution patterns, relationships between depth, sea surface temperature, and habitat use of short-finned pilot whales south-west of Tenerife. Eur Res Cetaceans 10:193–197Google Scholar
  44. Nichol LM, Shackleton DM (1996) Seasonal movements and foraging behaviour of northern resident killer whales (Orcinus orca) in relation to the inshore distribution of salmon (Oncorhynchus Pages) in British Columbia. Can J Zool 74:983–991Google Scholar
  45. Pichler FB, Baker CS (2000) Loss of genetic diversity in the endemic Hector's dolphin due to fisheries-related mortality. Proc R Soc Lond B Biol Sci 267:97–102CrossRefPubMedGoogle Scholar
  46. Pichler FB, Dawson SM, Slooten E, Baker CS (1998) Geographic isolation of Hector's dolphin populations described by mitochondrial DNA sequences. Conserv Biol 12:676–682CrossRefGoogle Scholar
  47. Reilly SB (1990) Seasonal changes in distribution and habitat differences among dolphins in the eastern tropical Pacific. Mar Ecol Prog Ser 66:1–11Google Scholar
  48. Scott MD, Wells RS, Irvine AB (1990) A long-term study of bottlenose dolphins on the west coast of Florida. In: Leatherwood S, Reeves RR (eds) The bottlenose dolphin. Academic, San Diego, pp 235–244Google Scholar
  49. Selzer LA, Payne PM (1988) The distribution of white-sided (Lagenorhynchus acutus) and common dolphins (Delphinus delphis) vs environmental features of the continental shelf of the northeastern United States. Mar Mamm Sci 4:141–153Google Scholar
  50. Slooten E, Dawson SM (1988) Studies on Hector's dolphin, Cephalorhynchus hectori: a progress report. Rep Int Whal Comm Spec Issue 9:325–338Google Scholar
  51. Slooten E, Dawson SM (1994) Hector's dolphin Cephalorhynchus hectori (van Beneden, 1881). In: Ridgway SH, Harrison R (eds) Handbook of marine mammals, vol 5. Academic, San Diego, pp 311–333Google Scholar
  52. SPSS (1999) SPSS reference guide. SPSS, ChicagoGoogle Scholar
  53. Urian KW, Wells RS, Scott MD, Irvine AB, Read AJ, Hohn AA (1998) When the shark bites: an analysis of shark bite scars on wild bottlenose dolphins (Tursiops truncatus) from Sarasota, Florida (abstract). In: World marine mammals conference. Monaco, p 139Google Scholar
  54. Watts P, Gaskin DE (1985) Habitat index analysis of the harbor porpoise (Phocoena phocoena) in the southern coastal Bay of Fundy, Canada. J Mamm 66:733–744Google Scholar
  55. Wells RS, Norris KS (1994) The island habitat. In: Norris KS, Würsig B, Wells RS, Würsig M (eds) The Hawaiian spinner dolphin. University of California Press, Berkeley, pp 31–53Google Scholar
  56. Wells RS, Irvine AB, Scott MD (1980) The social ecology of inshore odontocetes. In: Herman LM (ed) Cetacean behavior: mechanisms and processes. Wiley, New York, pp 263–317Google Scholar
  57. Wells RS, Hansen LJ, Baldridge A, Dohl TP, Kelly DL, Defran RH (1990) Northward extension of the range of bottlenose dolphins along the California coast. In: Leatherwood S, Reeves RR (eds) The bottlenose dolphin. Academic, San Diego, pp 421–431Google Scholar
  58. Würsig B (1986) Delphinid foraging strategies. In: Schusterman RJ, Thomas JA, Wood FG (eds) Dolphin cognition and behavior: a comparative approach. Lawrence Erlbaum, Hillsdale, N.J., pp 347–359Google Scholar
  59. Würsig B, Würsig M (1979) Behavior and ecology of the bottlenose dolphin, Tursiops truncatus, in the South Atlantic. Fish Bull (Wash DC) 77:399–412Google Scholar
  60. Würsig B, Würsig M (1980) Behavior and ecology of the dusky dolphin, Lagenorhynchus obscurus, in the South Atlantic. Fish Bull (Wash DC) 77:871–890Google Scholar

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • S. Bräger
    • 1
    • 4
  • J. A. Harraway
    • 2
  • B. F. J. Manly
    • 3
  1. 1.Department of Marine ScienceUniversity of OtagoDunedinNew Zealand
  2. 2.Department of Mathematics and StatisticsUniversity of OtagoDunedinNew Zealand
  3. 3.Western EcoSystems Technology, Inc.CheyenneUSA
  4. 4.Scharstorfer Weg 12SchellhornGermany

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