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Responses of hermit crabs to hemolymph from conspecifics and heterospecific crustaceans
Title
Responses of hermit crabs to hemolymph from conspecifics and heterospecific crustaceans.
Creator
Baechler, Patricia Joann., Florida Atlantic University, Brooks, W. Randy
Abstract/Description
Previous studies indicate that hermit crabs may use the blood or hemolymph from dying crabs to locate the soon-to-be-vacated shells. In this study, I determined and characterized the responses of hermit crabs to hemolymph from various crustaceans. Hermit crabs tested included members of the Diogenidae: Dardanus venosus, Clibanarius tricolor, C. antillensis, C. vittatus, and Calcinus tibicen; and Paguridae: Pagurus longicarpus and P. annulipes. Test odor sources included the previously...
Show morePrevious studies indicate that hermit crabs may use the blood or hemolymph from dying crabs to locate the soon-to-be-vacated shells. In this study, I determined and characterized the responses of hermit crabs to hemolymph from various crustaceans. Hermit crabs tested included members of the Diogenidae: Dardanus venosus, Clibanarius tricolor, C. antillensis, C. vittatus, and Calcinus tibicen; and Paguridae: Pagurus longicarpus and P. annulipes. Test odor sources included the previously mentioned hermit crabs plus seven additional odors, including three non-anomuran crustaceans. Most significant responses to hemolymph were to species within the same family. In several cases, the strongest responses were to conspecifics or congenerics. These results show clearly that hermit crabs in general use chemicals from other hermit crabs as cues for finding new shells. These results also show that the shell a crab occupies influences its response to odors, illustrating the role of context in these interactions.
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Date Issued
1996
PURL
http://purl.flvc.org/fcla/dt/15354
Subject Headings
Hermit crabs, Hemolymph, Crustacea
Format
Document (PDF)
Discrimination of chemical signals from gastropods by hermit crabs
Title
Discrimination of chemical signals from gastropods by hermit crabs.
Creator
Gonsalves, Deirdre C., Florida Atlantic University, Brooks, W. Randy
Abstract/Description
Some species of hermit crabs can locate chemically predation sites where snails are consumed and subsequently obtain their shells. This study addressed four questions: (1) Is chemotaxis to snail odors prevalent among hermit crabs? (2) Do members of hermit crab lineages respond similarly to common snail odors? (3) Do hermit crabs respond more acutely to snails whose shells they most frequently occupy? and (4) Does phylogeny of snails influence responses by hermit crabs? Two sets of congeners ...
Show moreSome species of hermit crabs can locate chemically predation sites where snails are consumed and subsequently obtain their shells. This study addressed four questions: (1) Is chemotaxis to snail odors prevalent among hermit crabs? (2) Do members of hermit crab lineages respond similarly to common snail odors? (3) Do hermit crabs respond more acutely to snails whose shells they most frequently occupy? and (4) Does phylogeny of snails influence responses by hermit crabs? Two sets of congeners (Clibanarius vittatuslC. tricolor and Dardanus venosuslD. fucosus) in the family Diogenidae, and three congeners (Pagurus pollicaris, P. longicarpus, and P. annulipes) in the family Paguridae were tested. Fifteen species of snails from 11 families served as test odors. Hermit crab response was measured by the fondling display, where one hermit crab investigates the shell of a neighboring crab. The diogenids discriminated odors more readily than did the pagurids. Correlations between responses and shells most frequently occupied existed for C. vittatus and D. venosus. Clibanarius tricolor was the only crab to respond to confamilial test odors.
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Date Issued
1996
PURL
http://purl.flvc.org/fcla/dt/15303
Subject Headings
Hermit crabs--Physiology, Gastropoda, Snails, Chemoreceptors
Format
Document (PDF)
New indications of the phylogenetic affinity of Spongosorites suberitoides Diaz et al., 1993 (Porifera, Demospongiae) as revealed by 28S ribosomal DNA
Title
New indications of the phylogenetic affinity of Spongosorites suberitoides Diaz et al., 1993 (Porifera, Demospongiae) as revealed by 28S ribosomal DNA.
Creator
McCormack, Grace P., Kelly, Michelle, Harbor Branch Oceanographic Institute
Date Issued
2002
PURL
http://purl.flvc.org/FCLA/DT/2795883
Subject Headings
Demospongiae --Classification, Sponges --Classification, Hermit-crabs --Identification, Crustacea --Identification, Demospongiae
Format
Document (PDF)