TY - CHAP T1 - Crustacea T2 - Fauna Japonica sive Descriptio Animalium, quae in Itinere per Japoniam, Jussu et Auspiciis Superiorum, qui Summum in India Batava Imperium Tenent, Suscepto, Annis 1823–1830 Collegit, Notis, Observationibus et Adumbrationibus Illustravit Y1 - 1844 A1 - de Haan, W. ED - von Siebold, P.F. SP - 1 EP - 243 JF - Fauna Japonica sive Descriptio Animalium, quae in Itinere per Japoniam, Jussu et Auspiciis Superiorum, qui Summum in India Batava Imperium Tenent, Suscepto, Annis 1823–1830 Collegit, Notis, Observationibus et Adumbrationibus Illustravit PB - Lugduni-Batavorum CY - Leiden ER - TY - JOUR T1 - Host use patterns and demography in a guild of tropical sponge-dwelling shrimps JF - Marine Ecology-Progress Series Y1 - 1992 A1 - Duffy, J. E. SP - 127 EP - 138 KW - Agelas clathrodes (Porifera) KW - Animalia KW - animals KW - Arthropoda KW - Arthropods KW - Comparative and Experimental Morphology KW - Crustaceans KW - Ecology KW - Ecology (Environmental Sciences) KW - Environmental Biology/Animal [07508] KW - Environmental Biology/Oceanography [07512] KW - Environmental Sciences) KW - Evolution [01500] KW - Evolution and Adaptation KW - Genetics KW - Genetics and Cytogenetics/Animal [03506] KW - Genetics and Cytogenetics/Population Genetics (1972- ) [03509] KW - Invertebrata KW - Invertebrates KW - Malacostraca: Crustacea KW - Marine Ecology (Ecology KW - Neotropical region) KW - Panama (Central America KW - Physiology KW - Physiology and Pathology/Arthropoda-Crustacea [64054] KW - Physiology and Pathology/Porifera [64006] KW - Population Genetics (Population Studies) KW - Porifera [39000] KW - Porifera: Invertebrata KW - Spheciospongia vesparium (Organisms - Unspecified) KW - sponge (Porifera) KW - Synalpheus brooksi (Malacostraca) KW - Synalpheus spp. (Malacostraca) AB - Demographic consequences of the commensal lifestyle of shrimps Synalpheus spp. were assessed by sampling sponges and coral rubble on reefs in Caribbean Panama. Eight of 22 species were found solely or primarily within the internal canals of sponges. Among these sponge-dwellers, host specificity ranged from generation (occurrence in gtoreq 4 host species) to specialization on a single host species, and sponges used in the field were also preferreed in laboratory choice assays. Living in sponges had important consequences for shrimp populations. Parasitism by epicaridean isopods averaged 6 times higher in obligate sponge-dwellers (17%) than in free-living species (2.5%). Sponge species differed in the mean size and size range of habitable spaces they provide, number of potentially competing Synalpheus species they support, and vulnerability of associated shrimps to parasitism. Similarly, conspecific shrimp populations occupying different hosts differed demographically. Specifically, populations and Synalpheus brooksi in the sponge Spheciospongia vesparium were significantly less dense, less parasitized, had larger body sizes, and tended toward higher proportions of mature females than conspecifics in the co-occurring sponge Agelas clathrodes. High host specificity, regional variation in host use, and demographic and genetic differentiation among conspecific shrimps in different host species suggest that the commensal lifestyle has pervasive, and potentially evolutionarily important, consequences for the population biology of this diverse group of shrimps. VL - 90 N1 - USA1992English ER - TY - JOUR T1 - Biodiversity, host specificity, and dominance by eusocial species among sponge-dwelling alpheid shrimp on the Belize Barrier Reef JF - Diversity And Distributions Y1 - 2006 A1 - Macdonald, K. S. A1 - Rios, R. A1 - Duffy, J. E. SP - 165 EP - 178 AB - Alpheid shrimp represent an abundant and diverse, but poorly characterized, component of the cryptic biodiversity of coral reefs worldwide. Sponge-inhabiting alpheids provide a promising model system for exploring patterns of cryptic reef biodiversity because their habitats (hosts) are discrete and qualitatively distinct units. We tabulated data from 14 years of collections at Carrie Bow Cay, Belize to quantify patterns of diversity, host specificity, and dominance among sponge-dwelling shrimp (Synalpheus), with special attention to eusocial species. From > 600 sampled sponges of 17 species, we recognized at least 36 Synalpheus shrimp species. Of these, 15 (42%) were new to science. Species accumulation curves suggest that we have sampled most of the Synalpheus diversity at Carrie Bow Cay. Diversity of sponge-dwelling Synalpheus was slightly higher in shallow water, probably because of greater habitat diversity, than in deep water. Host specificity was surprisingly high, with > 50% of all shrimp species found in only a single sponge species each, although some shrimp species used as many as six hosts. Cohabitation of individual sponges by multiple shrimp species was rarer than expected by chance, supporting previous distributional and behavioural evidence that competition for hosts is strong and moulds patterns of host association. The fauna of most well-sampled sponge species was dominated, both in numbers of individuals and in frequency of occurrence, by eusocial species. Eusocial shrimp species also inhabited a significantly greater number of sponge species than did non-social shrimp. Consequently, > 65% of shrimp in our quantitative samples belonged to the four eusocial species, and on a per-species basis, eusocial species were 17 times as abundant as non-social species. Our data suggest that the highly diverse sponge-dwelling shrimp assemblage of the Belize Barrier Reef is structured by competition, and that eusociality has allowed a small number of species to dominate the sponge resource. VL - 12 UR - file://localhost/Users/kristinhultgren/Desktop/Papers/Macdonald_Rios_&Duffy_2006.pdf ER -