Homochely in males of Minuca vocator (Herbst, 1804) (Brachyura: Ocypodidae: Gelasiminae)
Machos homoquelos de Minuca vocator (Herbst, 1804) (Brachyura: Ocypodidae: Gelasiminae)
DOI:
https://doi.org/10.37002/revistacepsul.vol13.2719e2024005Keywords:
Fiddler crabs, Itanhaém, malformations, mangrove, morphologyAbstract
This study evaluates the frequency of the abnormal homochelic male morphotype in a population of Minuca vocator (Herbst, 1804) inhabiting the mangroves of the Itanhaém River (SP), Brazil, which differs from the typical heterochelic pattern observed in Gelasiminae males. Out of 382 specimens captured (232 males and 151 females), only two males exhibited homochelic small chelipeds, accounting for 0.86% of the male population. This low
percentage may be genetically determined or could result from differential cheliped loss, depending on the developmental phase, which permanently affects this condition after regeneration. Although males with both abnormal hypertrophied morphotypes have been observed in other fiddler crab species, this phenomenon was not confirmed in this population. These abnormal conditions could confer either disadvantages or advantages to the individuals, warranting specific ethological experiments to investigate potential implications for trophic and behavioral interactions.
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