Aquatic Ecology

, Volume 42, Issue 1, pp 61–70 | Cite as

Comparing dietary preferences of Bufflehead ducklings in Western Canada through gut content and stable isotope analysis

Original Paper

Abstract

Aquatic invertebrates are essential for duckling growth and development. We present results on the trophic status and dietary analysis of Bufflehead (Bucephala albeola) ducklings from the boreal breeding grounds of western Canada. We estimated dietary preference by comparing invertebrates found in Bufflehead diets to those identified in standardized dip net samples at their wetland feeding sites. Stable isotope ratios of Bufflehead and their prey were used as a second estimator of trophic position. Bufflehead ducklings preferentially foraged for larval Dytiscidae (predaceous diving beetles; 46% of total dietary biomass), Zygoptera larvae (damselflies; 14%) and non-Dytiscidae adult Coleoptera (5%; mainly Haliplidae). Results from stable isotope analyses supported these results; the separation between primary and secondary invertebrate consumers and ducklings was significant for all possible contrasts when considering nitrogen isotope ratios (Tukey HSD; P < 0.001). We iteratively explored all possible combinations of δ15N and δ13C data to generate a proportional range over which each food source may contribute to Bufflehead stable isotope signatures; these results suggested larval Zygoptera and larval Dytiscidae figure prominently in diets when accounting for isotope fractionation. The incorporation of prey availability into the metric of dietary preference, as opposed to the tabulation of ingested items alone, reduces the importance of invertebrate groups such as adult Dytiscidae as highlighted in previous studies.

Keywords

Alberta Diet analysis Dytiscidae Western boreal forest Waterfowl Zygoptera 

References

  1. Bayley SE, Prather CM (2003) Do wetland lakes exhibit alternative stable states? Submersed aquatic vegetation and chlorophyll in western boreal shallow lakes. Limnol Oceaongr 48:2335–2345CrossRefGoogle Scholar
  2. Bellrose FC (1978) Ducks, geese and swans of North America. Stackpole Books, Harrisburg, Pennsylvania, USAGoogle Scholar
  3. Canadian Wildlife Service Waterfowl Committee (2001) Population status of migratory game birds in Canada: November 2001. CWS Migratory Birds Regular Report No. 4Google Scholar
  4. Canadian Wildlife Service Waterfowl Committee (2005) Population status of migratory game birds in Canada: November 2005. CWS Migratory Birds Regular Report No. 16Google Scholar
  5. Charnov EL (1976) Optimal foraging, the marginal value theorem. Theor Popul Biol 9:129–136PubMedCrossRefGoogle Scholar
  6. Cox RR, Hanson MA, Roy CC, Euliss NH, Johnson DH, Butler MG (1998) Mallard duckling growth and survival in relation to aquatic invertebrates. J Wildl Manage 62:124–133CrossRefGoogle Scholar
  7. Danell K, Sjöberg K (1980) Foods of wigeon, teal, mallard and pintail during the summer in a northern Swedish Lake. Viltrevy 11:139–167Google Scholar
  8. DeNiro MJ, Epstein S (1978) Influence of diet on the distribution of carbon isotopes in animals. Geochim Cosmochim Acta 42:495–506CrossRefGoogle Scholar
  9. Dixon J (1926) The Bufflehead breeds in California. Condor 28:47–48Google Scholar
  10. Dzubin A, Gollop JP (1972) Aspects of mallard breeding ecology in Canadian parkland and grassland. US Department of the Interior, Wildlife Resources Report No. 2:113–152Google Scholar
  11. Driver EA (1981) Calorific values of pond invertebrates eaten by ducks. Freshwater Biol 10:579–581CrossRefGoogle Scholar
  12. Driver EA, Sugden LG, Kovach RJ (1973) Calorific, chemical and physical values of potential duck foods. Freshwater Biol 4:281–292CrossRefGoogle Scholar
  13. Erskine AJ (1972) Buffleheads. Canadian Wildlife Service Monograph Series No. 4, Department of the Environment, CanadaGoogle Scholar
  14. Foote AL, Hornung CLR (2005) Odonates as biological indicators of grazing effects on Canadian prairie wetlands. Ecol Entomol 30:273–283CrossRefGoogle Scholar
  15. Foote AL, Krogman NT (2006) Wetlands in Canada’s Western Boreal Forest: agents of Change. Forest Chron 82:825–833Google Scholar
  16. Gannes LZ, O’Brien DM, Martinez del Rio C (1997) Stable isotopes in animal ecology: assumptions, caveats, and a call for more laboratory experiments. Ecology 78:1271–1276Google Scholar
  17. Gollop JB, Marshall WH (1954) A guide for aging duck broods in the field. Flyway Council Technical Section. No. 14Google Scholar
  18. Hebert CE, Wassenaar LI (2001) Stable nitrogen isotopes in waterfowl feathers reflect agricultural land use in Western Canada. Environ Sci Technol 35:3482–3487PubMedCrossRefGoogle Scholar
  19. Hill DA (1984) Population regulation in the Mallard (Anas platyrhynchos). J Anim Ecol 53:191–202CrossRefGoogle Scholar
  20. Hobson K, Clark R (1992) Assessing Avian diets using stable isotopes II: factors influencing diet-tissue fractionation. Condor 94:189–197CrossRefGoogle Scholar
  21. Hornung JP, Foote AL (2006) Aquatic invertebrate responses to fish presence and vegetation complexity in western boreal wetlands, with implications for waterbird productivity. Wetlands 26:1–12CrossRefGoogle Scholar
  22. Johnson DH, Sargeant AB, Greenwood RJ (1989) Importance of individual species of predators on nesting success of ducks in the Canadian Prairie Pothole region. Can J Zool 67:291–297CrossRefGoogle Scholar
  23. Jones RI, King L, Dent MM, Maberly SC, Gibson CE (2004) Nitrogen stable isotope ratios in surface sediments, epilithon and macrophytes from upland lakes with differing nutrient status. Freshwater Biol 49:382–391CrossRefGoogle Scholar
  24. Kaminski RH, Price HH (1981) Dabbling duck and aquatic macroinvertebrate responses to manipulated wetland habitat. J Wildl Manage 45:1–15CrossRefGoogle Scholar
  25. Krapu GL, Reinecke KJ (1992) Foraging ecology and nutrition. In: Batt BJD, Afton AD, Anderson MG, Ankney CD, Johnson DH, Kadlec JA, Krapu GL (eds) The ecology and management of breeding waterfowl. University of Minnesota Press, Minneapolis, USAGoogle Scholar
  26. Lundkvist EA (2003) Diversity of wetlands for a diversity of diving beetles (Coleoptera: Dytiscidae). Entomol Tidskr 124:213–217Google Scholar
  27. MacArthur RH, Pianka ER (1966) On optimal use of a patchy environment. Am Nat 100:603–609CrossRefGoogle Scholar
  28. McCune B, Grace JB (2002) Analysis of ecological communities. MjM Software Design, Gleneden Beach, Oregon, USAGoogle Scholar
  29. McCutchan JH Jr, Lewis WM, Kendall C, McGrath CC (2003) Variation in trophic shift for stable isotope ratios of carbon, nitrogen and sulphur. Oikos 102:378–390CrossRefGoogle Scholar
  30. Melville AJ, Connolly RM (2005) Food webs supporting fish over subtropical mudflats are based on transported organic matter not in situ microalgae. Mar Ecol 148:363–371Google Scholar
  31. Minagawa M, Wada E (1984) Stepwise enrichment of 15N along food chains: further evidence for the relation between 15N and animal age. Geochim Cosmochim Acta 48:1135–1140CrossRefGoogle Scholar
  32. Munro JA (1949) The birds and mammals of the Vanderhoof region, British Columbia. Am Midl Nat 41:1–138CrossRefGoogle Scholar
  33. Nummi P (1993) Food-niche relationships of sympatric mallards and green winged teals. Can J Zool 71:49–55CrossRefGoogle Scholar
  34. Phillips DL, Gregg JW (2003) Source partitioning using stable isotopes: coping with too many sources. Oecologia 136:261–269PubMedCrossRefGoogle Scholar
  35. Prepas EE, Pinel-Alloul B, Planas D, Méthot G, Paquet S, Reedyk S (2001) Forest harvest impacts on water quality and aquatic biota on the Boreal Plain: introduction to the TROLS lake program. Can J Fish Aquat Sci 58:421–436CrossRefGoogle Scholar
  36. Reinecke KJ, Owen RB Jr (1980) Food use and nutrition of Black Ducks nesting in Maine. J Wildl Manage 44:549–558CrossRefGoogle Scholar
  37. Schroder LD (1973) A literature review on the role of invertebrates in waterfowl management. Colorado Division of Wildlife Special Report 29, USAGoogle Scholar
  38. Scrimshaw S, Kerfoot WC (1987) Chemical defences of freshwater organisms: beetles and bugs. In: Kerfoot WC, Sih A (eds) Predation-direct and indirect impacts on aquatic communities. University Press of New England, Hanover, New HampshireGoogle Scholar
  39. Sedinger JS (1992) Ecology of prefledging waterfowl. In: Batt BJD, Afton AD, Anderson MG, Ankney CD, Johnson DH, Kadlec JA, Krapu GL (eds) Ecology and management of breeding waterfowl. University of Minnesota Press, Minneapolis, Minnesota, USAGoogle Scholar
  40. Sjöberg K, Pöysä H, Elmberg J, Nummi P (2000) Response of mallard ducklings to variation in habitat quality: an experiment of food limitation. Ecology 81:329–335Google Scholar
  41. Stott RS, Olson DP (1973) Food-habitat relationship of sea ducks on the New Hampshire coastline. Ecology 54:966–1007CrossRefGoogle Scholar
  42. Street M (1977) The food of mallard ducklings in a wet gravel quarry, and its relation to duckling survival. Wildfowl 28:113–125Google Scholar
  43. Thompson JE, Ankney CD (2002) Role of food in territoriality and egg production of buffleheads (Bucephala albeola) and barrow’s goldeneyes (Bucephala islandica). Auk 119:1075–1090CrossRefGoogle Scholar
  44. Vitt DH, Halsey LA, Thormann MN, Martin T (1998) Peatland inventory of Alberta, phase 1: overview of Peatland resources in the natural regions and subregions of the Province University of Alberta, Edmonton, Alberta, CanadaGoogle Scholar

Copyright information

© Springer Science+Business Media, B.V. 2007

Authors and Affiliations

  1. 1.Department of Renewable ResourcesUniversity of AlbertaEdmontonCanada

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