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Uca pugilator
About: Uca pugilator is a research topic. Over the lifetime, 376 publications have been published within this topic receiving 12303 citations.
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TL;DR: The present study has been the first to examine this type of fungal infestation from a quantitative perspective and the patterns of occurrence and abundance seemed best explained by the feeding habits of a species of crab, those with fungi being herbivorous and/or detritivorous.
Abstract: Fourteen species of brachyuran crabs from Tampa Bay, Florida, were examined for the occurrence and abundance of commensal trichomycetous fungi. Such fungi were found in the hindguts of six of these species, and all fungi observed belonged to the order Eccrinales. Percentage of occurrence of fungi in the infested species ranged from 10% (in Uca pugilator) to 70% (in Uca rapax). The fungi were quantified by estimating the total length of hyphae present in an individual crab. Mean amounts of fungi in the infested species ranged from 0.06 mm of hyphae per crab (U. pugilator) to 36.09 mm of hyphae per crab (Aratus pisonii). Separate collections were made in order to examine occurrence and abundance of fungi in three populations of A. pisonii and four populations of U. pugilator. Percentage of occurrence of fungi in populations of A. pisonii was from 80-95% and mean abundance of fungi was from 76.18-178.0 mm of hyphae per crab. Percentage of occurrence in populations of U. pugilator was from 5-25% and mean abundance of fungi was from 0.12-4.66 mm of hyphae per crab. The patterns of occurrence and abundance of fungi seemed best explained by the feeding habits of a species of crab, those with fungi being herbivorous and/or detritivorous. The present study has been the first to examine this type of fungal infestation from a quantitative perspective.
16 citations
TL;DR: It was evident that dispersion of the red pigment and melanin dispersion in the fiddler crab were caused by different substances, when extracts of organs from Palaemonetes vulgaris as well as from Uca pugilator were tested.
Abstract: The fiddler crab, Uca pugilator, and the prawn, Palaemonetes vulgaris, produce chromatophorotropins that disperse the red pigment in both species, concentrate the red pigment in both species, and disperse the melanin of the fiddler crab. The prawn does not have melanophores. However, the hormone obtained from organs of either the prawn or the crab that concentrates the pigment in the erythrophores of the prawn is different from the hormone present in the same extract which has the same physiological effect on the erythrophores of the crab. The identical conclusion was arrived at when the hormonal control of red pigment dispersion was considered. Furthermore, it was evident that dispersion of the red pigment and melanin dispersion in the fiddler crab were caused by different substances, when extracts of organs from Palaemonetes vulgaris as well as from Uca pugilator were tested.
16 citations
01 Jun 1933
16 citations
TL;DR: Colchicine substantially inhibits pigment aggregation but has only a slight inhibitory effect on pigment dispersion in melanophores of Hemigrapsus oregonensis, while cyclic AMP has a slight pigment-dispersing effect on melanophroses of Uca pugilator.
15 citations
TL;DR: The authors tested Uca pugilator, an inhabitant of relatively dry and sandy areas, and U. minax, which inhabits wetter and muddier substrates, to determine if species differ in PCB uptake and depuration rates.
Abstract: The primary objective of this research was to characterize rates of PCB uptake and depuration by fiddler crabs in a simulated spoil bank habitat that contained PCBs in weathered sediment. Also, the authors examined whether the concentration of PCBs in substrates affected bioaccumulation by mixing PCB-laden sediments with clean sand. In a pilot study, they tested Uca pugilator, an inhabitant of relatively dry and sandy areas, and U. minax, which inhabits wetter and muddier substrates, to determine if species differ in PCB uptake and depuration rates.
15 citations