| [abundance and diversity of littoral invertebrates in the socorro island, revillagigedo archipelago, mexico]. | composition, abundance, diversity and distribution of the littoral benthic invertebrates of socorro island with transects (parallel to the coast and with 1 m2 quadrats) were analyzed. during the spring of 1991 and 1992 samples were taken from the upper and middle levels of the intertidal zone in vargas lozano, braithwaite, blanca sw, blanca ne, binners, grayson, academia and norte bays. the 161 species found belong to porifera, cnidaria, platyhelmintha, nemertina, sipunculida, annelida, mollusca ... | 2002 | 12298272 |
| littoral decapods of socorro island, revillagigedo archipelago, mexico. | decapod community inhabiting the rocky littoral of eight bays from socorro island, revillagigedo archipelago, was studied during march 1992. samples were collected from one-square meter plots placed following transects drawn perpendicularly to the shoreline along the intertidal zone. species richness and abundance were determined in each bay, as well as the similarity between bays using morisita's index. organisms collected belong to six families, 20 genera and 26 species of the brachyura and an ... | 2003 | 15162691 |
| feeding behavior of a crab according to cheliped number. | cheliped loss through autotomy is a common reflexive response in decapod crustaceans. cheliped loss has direct and indirect effects on feeding behavior which can affect population dynamics and the role of species in the community. in this study, we assessed the impact of autotomy (0, 1, or 2 cheliped loss) on feeding behavior in the crab pachygrapsus transversus, an omnivorous and abundant species that inhabits subtropical intertidal rocky shores along the south atlantic ocean. autotomy altered ... | 2015 | 26682546 |
| environmentally driven shift between alternative female morphotypes in the mottled shore crab. | precocious maturity is an important life history trait and might be advantageous if the juvenile habitat is risky. larvae of the mottled shore crab pachygrapsus transversus settle to the benthic habitat at a very large size, undergo a brief juvenile development and mature within a few months at a size about a fourth of the asymptotic maximum size for this species. this strategy may rely on the capacity of this species to molt to a juvenile-like morphotype (mi) in which reproduction is suppressed ... | 2011 | 21906923 |