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Correlation of the distribution ofMesopodopsis slabberi (Crustacae, Mysidacea) with physico-chemical gradients in a partially-mixed estuary (Tamar, England)

Abstract

The physical and chemical processes operating in the River Tamar Estuary (south-west England) have been comprehensively described and reported in the literature. There are well-established gradients of salinity, suspended sediment and oxygen which vary both on short-term (tidal) and long-term (seasonal) cycles. Freshwater runoff, the main factor determining salinity distribution, is also the cause of the high variability in suspended sediment concentrations. The biological processes are less well studied and information on the link between the benthic and pelagic systems is particularly lacking. Mysids, through their role as detritivores and as a major component in the diet of some fish, provide this link. Of the four species of mysid distributed longitudinally in the Tamar Estuary, the most abundant isMesopodopsis slabberi which occurs between 5 and 25 km from the estuary head. Observations over an annual cycle have shown marked seasonal changes in both abundance and distribution in the estuary. During winter and spring, densities remained generally low (<50 m−3) but, as water temperatures increased, the density increased and reachedca 1200 individuals m−3 in July. There was a shift in the longitudinal distribution ofM. slabberi in response to changes in the position of the salinity gradient. Adults comprised the majority of the population in salinities less than 10‰ whereas juveniles and immature animals were distributed over a wider area than the adults and occurred in water of higher salinity than the main adult distribution.M. slabberi appears to utilise the two-layered estuarine circulation to maintain its position in the estuary.

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References

  1. ASTHORSSON, O.S., 1980. The life history and ecological energetics ofNeomysis integer (Leach)(Crustacea Mysidacea). PhD Thesis, University of Aberdeen 165 pp.

  2. BHATTACHARYA, S.S., 1982. Salinity and temperature tolerance of juvenileMesopodopsis orientalis: Laboratory studies. Hydrobiologia, 93: 23–30.

    Article  Google Scholar 

  3. FULTON, R.S. III, 1982a. Preliminary results of an experimental study of the effects of mysid predation on estuarine zooplankton community structure. Hydrobiologia, 93: 79–84.

    Article  Google Scholar 

  4. FULTON, R.S. III, 1982b. Predatory feeding of two marine mysids. Mar. Biol., 72: 183–191.

    Article  Google Scholar 

  5. GEORGE, K.J., 1975. The tides and tidal streams of the Tamar Estuary. PhD Thesis, University of London, 555 pp.

  6. GOMOIU, M.T., 1978. Qualitative data concerning the distribution and ecology of theMesopodopsis slabberi (van Beneden) of the Danube River Mouth area. Cercetaris Marine, 11: 103–112.

    Google Scholar 

  7. GREENWOOD, J.G., JONES, M.B. and GREENWOOD J. 1989. Salinity effects on brood maturation of the mysid crustaceanMesopodopsis slabberi. J. Mar. Biol. Ass. U.K., 69: 683–694.

    Google Scholar 

  8. HAMERLYNCK, O. and MEES, J. 1991. Temporal and spatial structure in the hyperbenthic community of a shallow coastal area and its relation to environmental variables. Oceanol. Acta. sp. 11: 205–212.

    Google Scholar 

  9. HARTLEY, P.H.T., 1940. The Saltash tuck-net fishery and the ecology of some estuarine fishes. J. Mar. Biol. Ass. U.K., 24: 1–68.

    Google Scholar 

  10. JONES, M.B., GREENWOOD, J.G. and GREENWOOD, J., 1989. Distribution, body size and brood characteristics of four species of mysids (Crustacea: Peracarida) in the Avon-Heathcote Estuary, New Zealand. New Z. J. Mar. Freshwat. Res., 23: 195–199.

    Google Scholar 

  11. KNUTSON, A.C. and ORSI, J.J., 1983. Factors regulating abundance and distribution of the shrimpNeomysis mercedis in the Sacramento-San Joaquin Estuary. Trans. Am. Fish. Soc., 112: 476–485.

    Article  Google Scholar 

  12. LASENBY, D.C. and LANGFORD, R.R., 1973. Feeding and assimilation ofMysis relicta. Limnol. and Oceanogr., 18: 280–285.

    Google Scholar 

  13. LORING, D.H., RANTALA, R.T.T., MORRIS, A.W., BALE, A.J. and HOWLAND, J.M., 1983. The chemical composition of suspended particles in an estuarine turbidity maximum zone. Can. J. Fish. Aquat. Sci., 40 (Suppl. 1): 201–206.

    Google Scholar 

  14. MAUCHLINE, J., 1969. The biology ofLeptomysis gracilis andL. lingvura [Crustacea, Mysidacea]. J. Mar. Biol. Ass. U.K., 49: 379–389.

    Google Scholar 

  15. MAUCHLINE, J., 1980. The biology of mysids. Adv. Mar. Biol., 18: 1–369.

    Google Scholar 

  16. MORRIS, A.W., BALE, A.J. and HOWLAND, R.J., 1982. Chemical variability in the Tamar Estuary, South-west England. Estuar., Coast. Shelf Sci. 14: 649–661.

    CAS  Google Scholar 

  17. MORRIS, A.W., HOWLAND, R.J.M., WOODWARD, F.M.S., BALE, A.J. and MANTOURA, R.F.C., 1985. Nitrite and ammonia in the Tamar Estuary. Neth. J. Sea Res., 19: 217–222.

    Google Scholar 

  18. ORSI, J.J. and KNUTSON Jr., A.C., 1979. The role of the mysid shrimp in the Sacramento-San Joaquin estuary and factors affecting their abundance and distribution. In: T.J. Conomos, Ed., San Francisco Bay: the urbanized estuary. Pac. Div. am. Ass. Adv. Sci., San Francisco. California, p. 401–408.

    Google Scholar 

  19. SIEGFRIED, C.A., KOPACHE, M.E., KNIGHT, A.W., 1979. The distribution and abundance ofNeomysis mercedis in relation to the entrapment zone in the western Sacramento-San Joaquin delta. Trans. Am. Fish. Soc., 108: 262–268.

    Article  Google Scholar 

  20. TATTERSALL, W.M. and TATTERSALL, O.S., 1951. The British Mysidacea. The Ray Society. London.

    Google Scholar 

  21. TODA, H., NISHIZAWA, S., TAKAHASHI, M. and ICHIMURA, S. 1983. Temperature control on the post-embryonic growth ofNeomysis intermedia Czerniawsky in a hypereutrophic temperate lake. J. Plankton Res., 5: 377–392.

    Google Scholar 

  22. TODA, H., TAKAHASHI, M. and ICHIMURA, S., 1984. The effect of temperature on the post-embryonic growth ofNeomysis intermedia Czerniawsky (Crustacea, Mysidacea) under laboratory conditions. J. Plankton Res., 6: 647–662.

    Google Scholar 

  23. UNCLES, R.J. and STEPHENS, J.A., 1990. Computed and observed currents, elevations and salinity in a branching estuary. Estuaries, 13: 133–144.

    Google Scholar 

  24. UNCLES, R.J., BALE, A.J., HOWLAND, R.J.M., MORRIS, A.W. and ELLIOT, R.C., 1983. Salinity of surface water in a partially-mixed estuary, and its dispersion at low run-off. Oceanol. Acta, 6: 289–296.

    Google Scholar 

  25. UNCLES, R.J., ELLIOT, R.C.A. and WESTON, S.A., 1985a. Observed fluxes of water, salt and suspended sediment in a partly mixed estuary. Est. Coast. Shelf Sci., 20: 147–167.

    CAS  Google Scholar 

  26. UNCLES, R.J., ELLIOT, R.C.A. and WESTON, S.A., 1985b. Lateral distributions of water, salt and suspended sediment transport in a partly mixed estuary. In: B.L. EDGE, Ed., Proc. 19th Int. Conf. Coast. Eng. Am. Soc. Civ. Eng., Houston, p. 3067–3077.

  27. UNCLES, R.J., ELLIOT, R.C.A. and WESTON, S.A., 1985. Dispersion of salt and suspended sediment in a partly mixed estuary. Estuaries. 8: 256–269.

    Google Scholar 

  28. WEBB, P. and WOOLDRIDGE, T.H., 1989. Diet elucidation: Supplementary inferences from mysid feeding appendage morphology. South A.J. Zool., 24: 106–109.

    Google Scholar 

  29. WITTMANN, K.J., 1992. Morphogeographic variations in the genusMesopodopsis Czerniavsky with description of three new species (Crustacea, Mysidacea). Hydrobiologia. 241: 71–89.

    Article  Google Scholar 

  30. WOOLDRIDGE, T. and ERASMUS, T., 1980. Utilization of tidal currents by estuarine zooplankton. Est. Coast. Mar. Sci., 11: 107–114.

    Google Scholar 

  31. WOOLDRIDGE, T. and BAILEY, C., 1982. Euryhaline zooplankton of the Sundays estuary and notes on trophic relationships. South A. J. Zool., 17: 151–163.

    Google Scholar 

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Moffat, A.M., Jones, M.B. Correlation of the distribution ofMesopodopsis slabberi (Crustacae, Mysidacea) with physico-chemical gradients in a partially-mixed estuary (Tamar, England). Netherlands Journal of Aquatic Ecology 27, 155–162 (1993). https://doi.org/10.1007/BF02334778

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Key Words

  • estuarine mysids
  • Mesopodopsis slabberi
  • distribution
  • Tamar Estuary