Intraspecific variation in carapace morphology among fiddler crabs (Genus Uca) from the Atlantic coast of Brazil
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Intraspecific Variation in Carapace Morphology Among Fiddler Crabs (Genus Uca) From the Atlantic Coast of Brazil
Isolation due to geographical barriers should promote genetic and morphological divergence among populations. Marine currents flowing in opposing directions along landmasses can constitute barriers that isolate populations dependent upon aquatic dispersal. The distribution of fiddler crabs (genus Uca) is regulated primarily by the oceanic transport of their planktonic larvae and by available ad...
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Among semi-terrestrial fiddler crabs, three species from the subgenus Uca (sensu stricto) appear to be basal in the phylogeny of the genus: Uca major (Herbst 1782-1804), Uca maracoani (Latreille 1802-1803) and Uca tangeri (Eydoux 1835). These species evolved vicariantly as tectonic plates separated to form the Atlantic Ocean. Currently, the three species, found in Africa, South America, and the...
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Cyber-taxonomy of name usage has focused primarily on producing authoritative lists of names or cross-linking names and data across disparate databases. A feature missing from much of this work is the recording and analysis of the context in which a name was used--context which can be critical for understanding not only what name an author used, but to which currently recognized species they ac...
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Salinity is the primary driver of osmoregulatory evolution in decapods, and may have influenced their diversification into different osmotic niches. In semi-terrestrial crabs, hyper-osmoregulatory ability favors sojourns into burrows and dilute media, and provides a safeguard against hemolymph dilution; hypo-osmoregulatory ability underlies emersion capability and a life more removed from water...
متن کاملRetinal location is the key to identifying predators in fiddler crabs (Uca pugilator).
Fiddler crabs (Uca pugilator Bosc; Crustacea, Decapoda) feed and court in open, flat spaces. Their visual system has several putative adaptations to their flat habitat, including the tendency to keep the vertical axis of their eyes perpendicular to the plane of the substratum. It is hypothesized that one of the functions of this behavior is to distinguish accurately predators from conspecifics ...
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ژورنال
عنوان ژورنال: Aquatic Biology
سال: 2014
ISSN: 1864-7782,1864-7790
DOI: 10.3354/ab00545