title for amphipod section of A SNAIL'S ODYSSEY
   
  Reproduction & dispersal
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  Dispersal
  The topic of reproduction & dispersal is divided into a section on dispersal, considered here, and sections on LIFE CYCLE, MATE SELECTION COPULATION & FERTILISATION, and BROOD CHAMBER, considered in other sections.
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Research study 1
 

photograph of green alga Ulva stranded by the tideDispersal in benthic amphipods is mostly limited to swimming and crawling and, for small individuals, floating, with “rafting” on drifting algal mats also occurring.  Counts of invertebrates in drift-algae samples originating from mudflats in San Juan Island, Washington in summer show that amphipods comprise more than 50% of the total number.  The author speculates that the geographic distribution of brooding species of invertebrates may generally be correlated with rafting opportunities.  Highsmith 1985 Mar Ecol Prog Ser 25: 169.

NOTE  of 1287 invertebrates present in 24 floating algal mats (consisting mainly of the green algae Ulva and Monostroma), amphipods represent 656.  Other invertebrates present are taneids, shrimps, polychaetes, gastropods, and other small species




Green alga Ulva sp. stranded by the
tide on a sand-mud flat, will soon be
lifted off by the incoming tide

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