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Amphipods and isopods in the rocky intertidal: dispersal and movements during high tide
 

Summary: Amphipods and isopods in the rocky intertidal: dispersal
and movements during high tide
Received: 27 January 2003 / Accepted: 12 May 2003 / Published online: 13 June 2003
Springer-Verlag 2003
Abstract Animals in the intertidal, both mobile and
sessile, generally exhibit some zonation pattern, in which
each species shows a preference for, or is confined to,
some height levels. The study of zonation patterns is,
however, almost exclusively based on surveys made
during low tide, when many animals are relatively
inactive. We studied zonation patterns of amphipods
and isopods on rocky shores in southwestern Iceland,
both by traditional sampling at low tide as well as by
sampling during high tide. The distributional patterns
seen at high tide differed significantly from that at low
tide. One amphipod, Anonyx sarsi, was common around
baits at all levels at high tide but absent from the
intertidal at low tide. Several other species were either
relatively more common or tended to be recorded
higher, or in one instance, lower on the shore when the

  

Source: Agnarsson, Ingi - Department of Biology, Universidad de Puerto Rico

 

Collections: Biology and Medicine