Polar Biology

, Volume 9, Issue 6, pp 405–408 | Cite as

Stomach evacuation rate in the planktivorous Antarctic fish Pagothenia borchgrevinki

  • John C. Montgomery
  • Brian A. Foster
  • John M. Cargill
Article

Summary

Specimens of the Antarctic fish Pagothenia borchgrevinki were collected from just below the sea-ice in McMurdo Sound over the period 5–16 November 1987. The stomach contents of 54 freshly captured fish were analysed and showed very strong similarities with an earlier, more extensive, dietary analysis conducted at the same location (Foster et al. 1987). There was as much variation in stomach contents from fish within a school, as there was between schools, contrary to the expectation that fish within a school would have shared a more common feeding history. Fish were maintained in holding tanks for up to 48 h after capture; groups were sacrificed at 6 h intervals and the stomach contents analysed to determine evacuation rates. Evacuation rates of total stomach contents and individual prey species were fitted with an exponential model of decay. The exponential time constant for decay of stomach contents was 32 h (Table 2), while time constants for individual prey species ranged from 12 h for small prey species to 49 h for the larger crustacea. The feeding rate of P. borchgrevinki on important prey species was calculated from the above data (Table 2). Low feeding rates, and the low numbers of P. borchgrevinki argue against removal by predation as being the explanation for the observed reduction in plankton numbers seen in shallow waters (Foster 1989).

Keywords

Evacuation Rate Stomach Content Prey Species Exponential Model Feeding Rate 

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References

  1. Andriashev AP (1967) Microflora and fauna associated with the Antarctic fast ice (in Russian). Zool Zhurn 46:1585–1593Google Scholar
  2. Andriashev AP (1970) Cryopelagic fishes of the Arctic and Antarctic fish fauna. In: Holdgate MW (ed) Antarctic ecology, vol 1. Academic Press, London, pp 297–304Google Scholar
  3. DeVries AL, Eastman JT (1981) Physiology and ecology of notothenioid fishes of the Ross Sea. J R Soc NZ 11:329–340Google Scholar
  4. Eastman JT, De Vries AL (1985) Adaptation for cryopelagic life in the Antarctic notothenioid Pagothenia borchgrevinki. Polar Biol 4:45–52Google Scholar
  5. Fange R, Grove DJ (1979) Digestion. In: Hoar WS, Randall DJ, Brett JR (eds) Fish physiology, vol 8. Academic Press, New YorkGoogle Scholar
  6. Foster BA, Cargill JM, Montgomery JC (1987) Planktivory in Pagothenia borchgrevinki (Pisces: Nototheniidae) in McMurdo Sound, Antarctica. Polar Biol 8:49–54Google Scholar
  7. Foster BA (1989) Time and depth comparison of sub-ice zooplankton in McMurdo Sound, Antarctica. Polar Biol (in press)Google Scholar
  8. Hoshiai T (1980) Feeding behaviour related to tidal rhythm in the young Trematomus borchgrevinki Boulenger. Pol Arch Hydrobiol 27:285–290Google Scholar
  9. Hoshiai T, Tanimura A (1981) Copepods in the stomach of a notothenioid fish Trematomus borchgrevinki fry at Syowa Station. Antarct Mem Natl Inst Pol Res, Ser E 34:44–48Google Scholar
  10. Hureau JC (1970) Biologie comparée de quelques poissons antarctiques (Nototheniidae). Bull Inst Oceanogr Monaco 68:1–244Google Scholar
  11. Jobling (1987) Influences of food particle size and dietary energy content on patterns of gastric evacuation in fish: test of a physiological model of gastric emptying. J Fish Biol 30:299–314Google Scholar
  12. Kock K-H (1985) Marine habitats — antarctic fish. In: Bonner WN, Walton DWH (eds) Key environments: Antarctica. Pergamon Press, Oxford, pp 173–192Google Scholar
  13. Macdonald JA, Montgomery JC, Wells RMG (1987) Comparative Physiology of Antarctic Fishes. Adv Mar Biol 24:321–388Google Scholar
  14. Persson L (1986) Patterns of food evacuation in fishes: a critical review. Env Biol Fish 16:51–58Google Scholar
  15. Salvatore SR, Mundahl ND, Wissing TE (1987) Effect of water temperature on food evacuation rate and feeding activity of Age-0 gizzard shad. Trans Am Fish Soc 116:67–70Google Scholar
  16. Vondracek B (1987) Digestion rates and gastric evacuation times in relation to temperature of the sacramento sqawfish, Ptychocheilus grandis. Fish Bull 85:159–163Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • John C. Montgomery
    • 1
  • Brian A. Foster
    • 1
  • John M. Cargill
    • 1
  1. 1.Department of ZoologyUniversity of AucklandAucklandNew Zealand

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