(File & Specimen - alph001)
Presented by Charles & Linda RaabeMactan Island, The Philippines
© 2008 All Rights Reserved
08 August 2008 Collected by
: Charles Raabe Location
: 25 feet deep commensal with a Pocillopora
coral colony.. Marigondon City, The Philippines. Identified by
: Leslie Harris, Los Angeles Natural History Museum Reference(s)
: Marco Vannini. A Shrimp That Speaks Crab-Ese. Journal of Crustacean Biology
, Vol. 5, No. 1 (Feb., 1985), pp.
: "Pairs of the crab Trapezia ferruginea and the snapping shrimp Alpheus lottini
live in very stable communities on Indo-Pacific pocilloporid corals. Both crabs
and shrimps were observed to defend the coral against intruders of both species
in the field. In the laboratory it has been shown that various appeasement
patterns must be performed by an intruder shrimp towards a crab before the
shrimp is accepted on the coral by the crab. These patterns appear to be
borrowed from the crab's appeasement repertoire and are never performed between
shrimps among themselves. The shrimp, as the weaker of the two, has to "learn"
how to inhibit the stronger crab's aggression by using the crab's own language.
: Other, smaller Caridean species were also found on the same Pocilloporid.
Host species: Pocillopora spp.
Partner species : Tetralia glaberrima
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