Distribuição geográfica potencial de espécies americanas do caranguejo "violinista" (Uca spp.) (Crustacea, Decapoda) com base em modelagem de nicho ecológico

Abstract

ABSTRACT. Potential geographical distribution of American species of "fiddler crab" (Uca spp.) (Crustacea, Decapoda) based on ecological niche model. The genus Uca Leach, 1814 (fiddler-crabs) is a well-know group characterized by a marked sexual dimorphism. Worldwide, there are 97 species of fiddler crabs described. Here, we predicted the potential geographical distribution of four species of this genus (Uca maracoani Latreille, 1802-1803, U. uruguayensis Nobili, 1901, U. panacea Novak & Salmon, 1974 e U. monilifera Rathbun, 1914), which occur in the American continent coast. Data used in the modeling were compiled from occurrence records available in the literature. We used Maxent and GARP programs for modelling, 10 climatic variables and three topographical variables. All variables were converted to a grid resolution of 0.0417 degrees. In both Maxent and GARP models the predicted geographical distribution of the species was larger than suggested by other observed data works, except for U. monilifera. According to the AUC criterion, the models generated by GARP were better than those obtained from Maxent. Evaluating the two models together, it is recommended conservation plans for species with restricted habitat (U. panaceae and U. monilifera) besides suggesting sampling of U. maracoani in the Brazilian northeast and U. uruguyaensis in the Brazilian southeast.

Combining multiple models to predict the geographical distribution of the Baru tree (Dipteryx alata Vogel) in the Brazilian Cerrado

“…Despite the high frequency of papers using GARP, recent comparative work has suggested that the Maxent models provide better results (Phillips et al, 2004;Elith et al, 2006;Phillips et al, 2006) and that they are more computationally efficient. However, Nabout et al, (2009) recorded higher AUC values for GARP when compared to Maxent when modelling the potential distributions of American fiddler crabs. Moreover, other papers support the importance of employing different modelling techniques.…”

Global literature of fiddler crabs, genus Uca (Decapoda, Ocypodidae): trends and future directions

“…Theses papers of Brazilian journal have focused mainly on issues such as ecology (e.g. NABOUT et al, 2009), morphology (e.g. BEZERRA & COELHO, 2009, and population structure (e.g.…”

The importance of considering small-scale variability in macrobenthic distribution: spatial segregation between two fiddler crab species (genus Leptuca) (Decapoda, Ocypodidae)

“…All fiddler crabs have until recently been considered to be in a unique genus (Uca Leach, 1814), composed of 97 widely distributed species (Crane, 1975;Rosenberg, 2001), but current reorganization has separated them into different genera based on phylogenetic relationships (Shih et al, 2016). Although each species shows a varied distribution range, in many areas theses ranges overlap and co-occurrence is common (Crane, 1975;Nabout et al, 2009;Thurman et al, 2013). Factors affecting large-scales patterns are related to larval survival during dispersal and settlement, such as water current, wind pattern and temperature change with latitudinal gradients (Bogazzi et al, 2001;Nabout et al, 2009;Wieman et al, 2014).…”

“…Although each species shows a varied distribution range, in many areas theses ranges overlap and co-occurrence is common (Crane, 1975;Nabout et al, 2009;Thurman et al, 2013). Factors affecting large-scales patterns are related to larval survival during dispersal and settlement, such as water current, wind pattern and temperature change with latitudinal gradients (Bogazzi et al, 2001;Nabout et al, 2009;Wieman et al, 2014). On a local scale, variables such as sediment grain size, tidal level, vegetation cover and salinity influence species occurrence and distribution (Thurman, 1987;Thurman et al, 2013;Mohktari et al, 2015;Checon & Costa, 2017).…”