Ecotoxicological effect of crude oil was evaluated in larvae zoea I of Emerita analoga. The samples were collected of the Cangrejos beach (05o08'30,02''-5o10'46,21'' SL and 81o10'35,04'81o10'24,0'' WL), Piura, Peru. Environmental parameters such as temperature, oxygen, pH and salinity were recorded in situ. The organisms were exposed at five concentrations of crude oil: -1 -1 -1 -1 -1 0,65 mg·L...

Migratory divides, the boundary between adjacent bird populations that migrate in different directions, are of considerable interest to evolutionary biologists because of their alleged role in speciation of migratory birds. However, the small size of many passerines has traditionally limited the tools available to track populations and as a result, restricted our ability to study how reproducti...

Recently new heuristic genetic algorithms such as Treefinder and MetaGA have been developed to search for optimal trees in a maximum likelihood (ML) framework. In this study we combined these methods with other standard heuristic approaches such as ML and maximum parsimony hill-climbing searches and Bayesian inference coupled with Markov chain Monte Carlo techniques under homogeneous and mixed ...

Tetralobistes gen. nov., a presently monotypic genus of hermit crab of the family Diogenidae, is described to accommodate a new species, Tetralobistes bicentenarius sp. nov. In many characters, Tetralobistes gen. nov. is similar to Areopaguristes Rahayu & McLaughlin, 2010, Paguristes Dana, 1851, and Pseudopaguristes Mclaughlin, 2002. However, it differs most significantly in the morphology of t...

Henri Filhol authored thirteen publications that established new names for decapod crustaceans in 1884 and 1885. The accurate dates of these publications are determined utilising notices of Filhol's publications in contemporary journals and library date-stamps. A checklist of the names for the Decapoda established by Filhol and their current identities is presented. Labophrys Filhol, 1885, and ...

SHIELDS, J. D., WICKHAM, D. E., and KURIS, A. M. 1989. Carcinonemertes regicides n.sp. (Nemertea), a symbiotic egg predator from the red king crab, Paralithodes camtschatica (Decapoda: Anomura), in Alaska. Can. J. Zool. 67: 923 930. A symbiotic nemertean worm, Carcinonemertes regicides n.sp., found on red king crabs, Paralithodes camtschatica, is described and compared with other members of the...

We investigated the navigational capabilities of the world's largest land-living arthropod, the giant robber crab Birgus latro (Anomura, Coenobitidae); this crab reaches 4 kg in weight and can reach an age of up to 60 years. Populations are distributed over small Indo-Pacific islands of the tropics, including Christmas Island (Indian Ocean). Although this species has served as a crustacean mode...

Crustaceans are characterized by some of the most variable genome sizes among animals. Significant relationships between size and specific eco-physiological morphological features have been described in many crustacean taxa, such as Amphipoda, Ostracoda, Cladocera, Copepoda. A consistent pattern variation is yet to be found, however, one specious order crustaceans, Decapoda. We investigated how...