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The swimming behaviour and distribution of Neomysis integer in relation to tidal flow
Lawrie, S.M.; Speirs, D.C.; Raffaelli, D.G.; Gurney, W.S.C.; Paterson, D.M.; Ford, R. (1999). The swimming behaviour and distribution of Neomysis integer in relation to tidal flow. J. Exp. Mar. Biol. Ecol. 242(1): 95-106
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981, more
Peer reviewed article  

Available in Authors 

Keywords
    Current velocity; Ecological distribution; Environmental conditions; Habitat selection; Stream flow rate; Swimming; Tidal currents; Neomysis integer (Leach, 1814) [WoRMS]; Brackish water

Authors  Top 
  • Lawrie, S.M.
  • Speirs, D.C.
  • Raffaelli, D.G., more
  • Gurney, W.S.C.
  • Paterson, D.M., more
  • Ford, R.

Abstract
    The behaviour and distribution of the estuarine mysid shrimp, Neomysis integer, were investigated in relation to a variety of flow regimes in the field and in the laboratory. In the field, Neomysis aggregated in low-flow areas, such as in the lee of rocks and macroalgal clumps. Over the low-tide period and during ascending and high-tide periods, individuals were concentrated in a band toward the moving tide edge where flows are typically low. Experiments performed using a laboratory flume demonstrated a clear response of Neomysis to flow, the proportion of individuals above the bed declining with increasing flow. At flows of up to 10 cm s-1 , 90-95% of individuals were able to maintain position on the bed of the flume, but at flows greater than this, Neomysis were unable to maintain position. When provided with a choice of water depths in a laboratory static tank (zero flow), there was little evidence of depth-seeking behaviour. We suggest that avoidance of areas of high flow is a key factor determining the local distribution of Neomysis.

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