Polar Biology

, Volume 41, Issue 4, pp 611–617 | Cite as

Three cases of potential twinning in Weddell seals (Leptonychotes weddellii) at Fildes Peninsula, King George Island, Antarctica

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Abstract

An isolated female with two pups in the field has occasionally been documented in pinnipeds; this phenomenon may represent twinning, fostering, or adoption. This study presents three cases of female Weddell seals (Leptonychotes weddellii) that attended two pups on Biyu Beach at Fildes Peninsula, King George Island, Antarctica where 16 mother–pup pairs were observed in total during the 2014 breeding season. Each pup in each case exhibited intense association with the female, despite being separated on occasions from the mother. In each case, both pups, at about 3 weeks of age, showed different growth development, which corresponded to the duration of nursing from their mothers; the bigger pup had more opportunity to suckle. Moreover, both pups in each case were female, were born in a low-density colony, and had strong attachment with their mother, showing similarities to other studies of confirmed twinning in pinnipeds. All individuals were in good condition when last seen, which could be due to the possible suitable rearing environment, e.g., low-density colony and flat beach topography.

Keywords

Adoption Behavior Fildes Peninsula Fostering Weddell seal Twinning 

Notes

Acknowledgements

The authors are grateful to the Chinese Arctic and Antarctic Administration of the State Oceanic Administration, and the Polar Research Institute of China for logistical support in the field. We also appreciate the members J. J. Cao, J. Xiong, and R. H. Wang of the 30th Chinese Antarctic scientific expedition for their generous help and assistance during field investigation, and the anonymous reviewers for their comments to improve this paper. This research was funded by the Scientific Research Foundation of the Third Institute of Oceanography, State Oceanic Administration of China (TIO2015036), Chinese Polar Environment Comprehensive Investigation and Assessment Program (CHINARE2012-2015-04-03, CHINARE2012-2015-03-05), and State Oceanic Administration of China (SOA, 2011GW13ZS07019).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Ethical approval

All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

References

  1. Altmann J (1974) Observational study of behavior: sampling methods. Behaviour 49:227–267.  https://doi.org/10.1163/156853974X00534 CrossRefPubMedGoogle Scholar
  2. Boness DJ (1990) Fostering behavior in Hawaiian monk seals: is there a reproductive cost? Behav Ecol Sociobiol 27:113–122.  https://doi.org/10.1007/BF00168454 CrossRefGoogle Scholar
  3. Boness DJ, Bowen WD, Iverson SJ (1995) Does male harassment of females contribute to reproductive synchrony in the grey seal by affecting maternal performance? Behav Ecol Sociobiol 36:1–10.  https://doi.org/10.1007/BF00175722 CrossRefGoogle Scholar
  4. Boness DJ, Craig MP, Honigman L, Austin S (1998) Fostering behavior and the effect of female density in Hawaiian monk seals, Monachus schauinslandi. J Mammal 79:1060–1069.  https://doi.org/10.2307/1383115 CrossRefGoogle Scholar
  5. Bryden MM (1966) Twin foetuses in the southern elephant seal. Pap proc R Soc Tasmania 100:89–90Google Scholar
  6. Carrick RS, Csordas SE, Ingham SE (1962) Studies on the southern elephant seal, Mirounga leonina (L.). IV. Breeding and development. Wildl Res 7:161–197CrossRefGoogle Scholar
  7. Christensen TE, Le Boeuf BJ (1978) Aggression in the female northern elephant seal, Mirounga angustirostris. Behaviour 64:158–172.  https://doi.org/10.1163/156853978X00495 CrossRefGoogle Scholar
  8. Clutton-Brock TH (1988) Reproductive success: studies of individual variation in contrasting breeding systems. University of Chicago Press, ChicagoGoogle Scholar
  9. Dowell SA, Boren LJ, Negro S, Muller CG, Caudron AK, Gemmell NJ (2008) Rearing two New Zealand fur seal (Arctocephalus forsteri) pups to weaning. Aust J Zool 56:33–39.  https://doi.org/10.1071/ZO07063 CrossRefGoogle Scholar
  10. Ellis SL, Bowen WD, Boness DJ, Iverson SJ (2000) Maternal effects on offspring mass and stage of development at birth in the harbor seal, Phoca vitulina. J Mammal 81:1143–1156CrossRefGoogle Scholar
  11. Fenwick GD (1973) Breeding biology and population dynamics of the Weddell seals, Leptonychotes weddellii: a review. Mauri Ora 1:29–36Google Scholar
  12. Galimberti F, Boitani L, Marzetti I (2000a) The frequency and costs of harassment in southern elephant seals. Ethol Ecol Evol 12:345–365.  https://doi.org/10.1080/08927014.2000.9522792 CrossRefGoogle Scholar
  13. Galimberti F, Boitani L, Marzetti I (2000b) Harassment during arrival on land and departure to sea in southern elephant seals. Ethol Ecol Evol 12:389–404.  https://doi.org/10.1080/08927014.2000.9522794 CrossRefGoogle Scholar
  14. Gelatt TS, Davis CS, Siniff DB, Strobeck C (2001) Molecular evidence for twinning in Weddell seals (Leptonycotes weddellii). J Mammal 82:491–499CrossRefGoogle Scholar
  15. Gentry RL (1970) Social behavior of the Steller sea lion. Dissertation, University of California, CaliforniaGoogle Scholar
  16. Haase TJ (2007) Suckling an additional pup to weaning in the New Zealand fur seal. Mar Mammal Sci 23:176–183.  https://doi.org/10.1111/j.1748-7692.2006.00078.x CrossRefGoogle Scholar
  17. Hoffman HI, Forcada J (2009) Genetic analysis of twinning in Antarctic fur seals (Arctocephalus Gazella). J Mammal 90:621–628.  https://doi.org/10.1644/08-MAMM-A-264R1.1 CrossRefGoogle Scholar
  18. Huber HR, Beckham C, Nisbet J (1991) Effects of the 1982–83 E1 Niño on northern elephant seals on the South Farallon Islands, California. In: Trillmich F, Ono KA (eds) Pinnipeds and E1 Niño: responses to environmental stress. Springer, New York, pp 219–233CrossRefGoogle Scholar
  19. Hückstädt L (2015) Leptonychotes weddellii. The IUCN red list of threatened species. www.iucnredlist.org. Accessed 18 Aug 2016
  20. Kaufman GW, Siniff DB, Reichle R (1975) Colony behavior of Weddell seals, Leptonychotes weddellii at Hutton Cliffs, Antarctic. Rapp P V Reun Cons Int Explor 169:228–246Google Scholar
  21. Lake SE, Burton HR, Hindell MA (1997) Influence of time of day and month on Weddell seal haulout patterns at the Vestfold Hills, Antarctica. Polar Biol 18:319–324.  https://doi.org/10.1007/s003000050194 CrossRefGoogle Scholar
  22. Laws RM (1953) The elephant seal (Mirounga leonina Linn.): I. Growth and age. Falkland Isl Depend Surv Sci Rep 8:1–62Google Scholar
  23. Le Boeuf BJ, Morris P, Reiter J (1994) Juvenile survivorship of northern elephant seals. In: Le Boeuf BJ, Laws RM (eds) Elephant seals: population ecology, behavior, and physiology. University of California Press, California, pp 121–136Google Scholar
  24. Lunn NJ (1992) Fostering behavior and milk stealing in Antarctic fur seals. Can J Zool 70:837–839.  https://doi.org/10.1139/z92-119 CrossRefGoogle Scholar
  25. Maniscalco JM, Parker P (2009) A case of twinning and the care of two offspring of different age in Steller sea lions. Mar Mammal Sci 25:206–213.  https://doi.org/10.1111/j.1748-7692.2008.00247.x CrossRefGoogle Scholar
  26. McCann TS (1981) Aggression and sexual activity of male southern elephant seals, Mirounga leonine. J Zool 195:295–310.  https://doi.org/10.1111/j.1469-7998.1981.tb03467.x CrossRefGoogle Scholar
  27. McCann TS (1982) Aggressive and maternal activities of female southern elephant seal (Mirounga leonina). Anim Behav 30:268–276.  https://doi.org/10.1016/S0003-3472(82)80263-7 CrossRefGoogle Scholar
  28. McMahon CR, Bradshaw CJA (2004) Harem choice and breeding experience of female southern elephant seals influence offspring survival. Behav Ecol Sociobiol 55:349–362.  https://doi.org/10.1007/s00265-003-0721-1 CrossRefGoogle Scholar
  29. McMahon CR, Hindell MA (2003) Twinning in southern elephant seals: the implications of resource allocation by mothers. Wildl Res 30:35–39.  https://doi.org/10.1071/WR01069 CrossRefGoogle Scholar
  30. Oftedal OT, Boness DJ, Tedman RA (1987) The behavior physiology, and anatomy of lactation in the pinnipedia. Curr Mammal 1:175–245.  https://doi.org/10.1007/978-1-4757-9909-5_6 CrossRefGoogle Scholar
  31. Perry EA, Boness DJ, Fleischer RC (1998) DNA fingerprinting evidence of nonfilial nursing in grey seals. Mol Ecol 7:81–85.  https://doi.org/10.1046/j.1365-294x.1998.00313.x CrossRefPubMedGoogle Scholar
  32. Peter H-U, Buesser C, Mustafa O, Pfeiffer S (2008) Risk assessment for the Fildes Peninsula and Ardley Island, and development of management plans for designation as Antarctic specially protected or managed areas. The Federal Environment Agency, GermanyGoogle Scholar
  33. Plötz J (1986) Summer diet of Weddell seals (Leptonychotes weddelli) in the Eastern and Southern Weddell sea, Antarctica. Polar Biol 6:97–102.  https://doi.org/10.1007/BF00258259 CrossRefGoogle Scholar
  34. Rae BB (1969) Twin seals in Scotland. J Zool 158:243–245CrossRefGoogle Scholar
  35. Reijnders PJH, Plötz J, Zegers J, Grafe M (1990) Breeding biology of Weddell seals (Leptonychotes weddellii) at Drescher Inlet, Riiser Larsen Ice Shelf, Antarctica. Polar Biol 10:301–306.  https://doi.org/10.1007/BF00238429 CrossRefGoogle Scholar
  36. Reiter J, Panken KJ, Le Boeuf BJ (1981) Female competition and reproductive success in the northern elephant seals. Anim Behav 29:670–687.  https://doi.org/10.1016/S0003-3472(81)80002-4 CrossRefGoogle Scholar
  37. Riedman ML, Le Boeuf BJ (1982) Mother–pup separation and adoption in northern elephant seals. Behav Ecol Sociobiol 11:203–215.  https://doi.org/10.1007/BF00300063 CrossRefGoogle Scholar
  38. Schaeff CM, Boness DJ, Bowen WD (1999) Female distribution, genetic relatedness, and fostering behavior in harbor seals, Phoca vitulina. Anim Behav 57:427–434.  https://doi.org/10.1006/anbe.1998.1001 CrossRefPubMedGoogle Scholar
  39. Schultz JK, Becker BL, Johanos TC, Lopez JU, Kashinsky L (2011) Dizygotic twinning in the Hawaiian monk seal. J Mammal 92:336–341.  https://doi.org/10.2307/23260097 CrossRefGoogle Scholar
  40. Shirihai H, Jarrett B (2006) Whales, dolphins, and other marine mammals of the world. Princeton University Press, New JerseyGoogle Scholar
  41. Smith MSR (1966) Studies of the Weddell seal in McMurdo Sound, Antarctica. Dissertation, University of Canterbury, ChristchurchGoogle Scholar
  42. Smith EA (1968) Adoptive suckling in the grey seal. Nature 217:762–763.  https://doi.org/10.1038/217762a0 CrossRefGoogle Scholar
  43. Spotte S (1982) The incidence of twins in pinnipeds. Can J Zool 60:2226–2233CrossRefGoogle Scholar
  44. Stirling I (1969) Ecology of the Weddell Seal in McMurdo Sound, Antarctica. Ecology 50:573–586.  https://doi.org/10.2307/1936247 CrossRefGoogle Scholar
  45. Stirling I (1975) Adoptive suckling in pinnipeds. J Aust Mammal Soc 1:389–391Google Scholar
  46. Tedman R, Green B (1987) Water and sodium fluxes and lactational energetics in suckling pups of Weddell seal (Leptonychotes weddellii). J Zool 212:29–42.  https://doi.org/10.1111/j.1469-7998.1987.tb05112.x CrossRefGoogle Scholar
  47. Testa JW, Hill SEB, Siniff DB (1989) Diving behavior and maternal investment in Weddell seals (Leptonychotes weddellii). Mar Mammal Sci 5:399–405.  https://doi.org/10.1111/j.1748-7692.1989.tb00354.x CrossRefGoogle Scholar
  48. Trillmich F (1981) Mutual mother-pup recognition in Galapagos fur seals and sea lions: cues used and functional significance. Behaviour 78:21–42.  https://doi.org/10.1163/156853981X00248 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Laboratory of Marine Biology and Ecology, Third Institute of OceanographyState Oceanic AdminstrationXiamenPeople’s Republic of China
  2. 2.Ministry of Education Key Laboratory for Biodiversity Sciences and Ecological Engineering, College of Life SciencesBeijing Normal UniversityBeijingPeople’s Republic of China
  3. 3.Ocean CollegeShandong University (Weihai)WeihaiPeople’s Republic of China

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