Behavioral Ecology and Sociobiology

, Volume 27, Issue 2, pp 113–122

Fostering behavior in Hawaiian monk seals: is there a reproductive cost?

  • Daryl J. Boness
Article

Summary

Fostering behavior has been reported in a large number of mammal and bird species although the relative frequency of its occurrence in most species is unknown. A commonly held view is that fostering is costly to the parent(s) engaged in it. However, empirical studies of fostering are few, and measures of either cost or benefit are even rarer. During a study of individually marked Hawaiian monk seal mothers and pups, observed over the course of maternal care, I found that 87% of 30 females fostered pups. Females sequentially fostered an average of 2.3 pups (range: 1–5 pups) during the approximately 40-day lactation. The median proportion of lactation spent fostering was 34% (range: 5%–90%). Confusion during aggressive interactions appeared to be the major antecedent of fostering and may be understandable in terms of the spatial pattern among females. The density of females with pups was relatively low for a land-breeding seal (1.5 females per 1000 m2), and the typical spatial pattern indicated a tendency toward dispersion. Yet, movements of females and pups to and from water occasionally leave females within a meter or two of each other. Several measures of the immediate reproductive cost of fostering were obtained, including: the length of time suckled by pups, the size of pups at the end of suckling, and survivorship to 1 year of age. There was no correlation between these measures for individual pups and the extent to which their mothers fostered, indicating that the high levels of fostering may be maintained in monk seals because they are not selected against.

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References

  1. Alcorn D (1984) The Hawaiian monk seal on Laysan Island: 1982. US Dep Commer, NOAA Tech Memo NMFS, NOAA-TMNMFS-SWFC-42Google Scholar
  2. Alcorn D, Henderson J (1984) Resumption of nursing in “weaned” Hawaiian monk seal pups. Elepaio 45:11–12Google Scholar
  3. American Society of Mammalogists (1967) Standard measurements of seals. J Mammal 48:459–462Google Scholar
  4. Bartholomew GA (1952) Reproductive and social behavior of the northern elephant seal. Univ Calif Publ Zool 47:369–472Google Scholar
  5. Bartholomew GA (1959) Mother-young relations and the maturation of pup behavior in the Alaskan fur seal. Anim Behav 7:163–171Google Scholar
  6. Boness DJ, James H (1979) Reproductive behaviour of the grey seal (Halichoerus grypus) on Sable Island, Nova Scotia. J Zool (London) 188:477–500Google Scholar
  7. Bowen WD (1990) Behavioral ecology of pinniped neonates. In: Renouf D (eds) Behavior of pinnipeds. Chapman Hall, London (in press)Google Scholar
  8. Burns JJ, Ray GC, Fay FH, Shaughnessy PD (1972) Adoption of a strange pup by the ice-inhabiting harbor seal, Phoca vitulina largha. J Mammal 53:594–598Google Scholar
  9. Carter LR, Spear LB (1986) Costs of adoption in western gulls. Condor 88:253–256Google Scholar
  10. Clark PJ, Evans FC (1954) Distance to nearest neighbor as a measure of spatial relationship in populations. Ecology 35:445–453Google Scholar
  11. Davis RB, Herreid CF, Short HL (1962) Mexican free-tailed bats in Texas. Ecol Monogr 32:311–346Google Scholar
  12. Dinerstein E, Wemmer C, Mishra H (1988) Adoption in greater one-horned rhinoceros (Rhinoceros unicornis). J Mammal 69:813–814Google Scholar
  13. Eales LA, Bullock DJ, Slater PJB (1988) Shared nursing in (Pipistrellus pipistrellus)? J Zool (London) 216:584–587Google Scholar
  14. Eddy WF (1977) A new convex Hull algorithm for planer sets from ACM. Trans Math Software 3:398–403Google Scholar
  15. Erickson AW, Miller LH (1963) Cub adoption in the brown bear. J Mammal 44:584–585Google Scholar
  16. Fogden SCL (1971) Mother-young behaviour at grey seal breeding beaches. J Zool (London) 164:61–92Google Scholar
  17. Gerrodette T (1985) Estimating the 1983 population of Hawaiian monk seals from beach counts. NMFS, SWFC Admin Rpt H-85-5Google Scholar
  18. Gilmartin WG (1983) Recovery plan of the Hawaiian monk seal, Monachus schauinslandi, US Dept Commer, NMFS, NOAAA, Southwest RegionGoogle Scholar
  19. Gilmartin WG (1988) The Hawaiian monk seal: population status and current research. NMFS, SWFC Admin Rpt H-88-17Google Scholar
  20. Graves JA, Whiten A (1980) Adoption of strange chicks by herring gulls, Larus agentatus L. Z Tierphsychol 54:267–278Google Scholar
  21. Gustin MK, McCracken GF (1987) Scent recognition between females and pups in the bat, Tadarida brasiliensis mexicana. Anim Behav 35:13–20Google Scholar
  22. Hebert PN (1988) Adoption behaviour by gulls: a new hypothesis. Ibis 130:216–220Google Scholar
  23. Holley AJF (1981) Naturally arising adoptions in the herring gull. Anim Behav 29:302–303Google Scholar
  24. Holley AJF (1984) Adoption, parent-chick recognition and maladaptation in the herring gull Larus argentatus. Z Tierpsychol 64:9–14Google Scholar
  25. Hunt GL, Hunt MW (1975) Reproductive ecology of the western gull: the importance of nest spacing. Auk 92:270–279Google Scholar
  26. Johanos TC, Henderson JR (1986) Hawaiian monk seal reproduction and injuries on Lisianski Island: 1982. US Dep Commer, NOAA Tech Memo NMFS, NOAA-TM-NMFS-SWFC-64Google Scholar
  27. Johanos TC, Kam AKH (1986) The Hawaiian monk seal on Lisianski Island: 1983. US Dep Commer, NOAA Tech Memo NMFS, NOAA-TM-NMFS-SWFC-58Google Scholar
  28. Johnson BW, Johnson PA (1984) Observation of the Hawaiian monk seal on Laysan Island from 1977 through 1980. US Dep Commer, NOAA Tech Memo NMFS, NOAA-TM-NMFSSWFC-49Google Scholar
  29. Kenyon KW, Rice DW (1959) Life history of the Hawaiian monk seal. Pac Sci 13:215–252Google Scholar
  30. King J (1956) The monk seals (Genus Monachus). Bull Br Mus (Nat Hist) 3:201–256Google Scholar
  31. Kleiman DG (1969) Maternal care, growth rate, and development in the noctule (Nyctalus noctula), pipistrelle (Pipistrellus pipistrellus), and serotine (Eptesicus serotinus) bats. J Zool (London) 157:187–211Google Scholar
  32. Koenig WD (1988) Reciprocal altruism in birds: a critical review. Ethol Sociobiol 9:73–84Google Scholar
  33. Le Bouef BJ, Briggs KT (1977) The cost of living in a seal harem. Mammalia 41:167–195Google Scholar
  34. McCracken GF (1984) Communal nursing in Mexican free-tailed bat maternity colonies. Science 223:1090–1091Google Scholar
  35. Parker GA (1984) Evolutionarily stable strategies. In: Krebs JR, Davies NB (eds) Behavioural ecology, 2nd edn. Blackwell Scientific, OxfordGoogle Scholar
  36. Petrinovitch L (1974) Individual recognition of pup vocalization by northern elephant seal mothers. Z Tierpsychol 34:308–312Google Scholar
  37. Pierotti R (1980) Spite and altruism in gulls. Am Nat 115:290–300Google Scholar
  38. Plissner JH, Gowaty PA (1988) Evidence of reproductive error in adoption of nestling eastern bluebirds (Sialia sialis). Auk 105:275–278Google Scholar
  39. Renouf D (1985) A demonstration of the ability of the harbor seal Phoca vitulina (L) to discriminate among pup vocalizations. J Exp Mar Biol Ecol 87:41–46Google Scholar
  40. Riedman ML (1982) The evolution of alloparental care and adoption in mammals and birds. Q Rev Biol 57:405–435Google Scholar
  41. Riedman ML, Le Boeuf BJ (1982) Mother-pup separation and adoption in northern elephant seals. Behav Ecol Sociobiol 11:203–215Google Scholar
  42. Rohwer S (1986) Selection for adoption versus infanticide by replacement “mates” in birds. Curr Ornith 3:353–395Google Scholar
  43. Stirling I (1975) Adoptive suckling in pinnipeds. J Aust Mammal Soc 1:389–391Google Scholar
  44. Terhune J, Terhune M, Ronald K (1979) Location and recognition of pups by adult female harp seals. Appl Anim Ethol 5:375–380Google Scholar
  45. Waltz EC (1981) Reciprocal altruism and spite in gulls: a comment. Am Nat 118:588–592Google Scholar
  46. Watkins LC, Shump KA (1981) Behavior of the evening bat Nycticeius humeralis at a nursery roost. Am Midl Nat 105:258–268Google Scholar

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • Daryl J. Boness
    • 1
  1. 1.Department of Zoological Research, National Zoological ParkSmithsonian InstitutionWashingtonUSA

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