Extension of the known southern distributions of three estuarine snapping shrimps of the genus Alpheus Fabricius, 1798 (Caridea, Alpheidae) in South America

Almeida, Alexandre Oliveira; Mantelatto, Fernando L.

doi:10.1163/15685403-00003238

Cited by 8 publications

(1 citation statement)

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“…Alpheus estuariensis Christoffersen, 1984 is commonly found in estuarine environments in the mud, in burrows or under rocks between herbaceous vegetation or Rhizophora roots, from the intertidal region down to a depth of 22 m (Almeida et al ., 2012). They occur in the Western Atlantic from Florida to the State of Santa Catarina, southern Brazil (Almeida & Mantelatto, 2013). Taking into account the aforementioned, the present study has two objectives, using the shrimp A. estuariensis as a model: (1) to test whether or not shrimp monopolize their refuges; and (2) to test the hypothesis of monogamy in two populations from north-east Brazil.…”

Section: Introductionmentioning

confidence: 99%

Testing the resource economic monopolization hypothesis and its consequences for the mating system ofAlpheus estuariensis(Decapoda, Caridea, Alpheidae)

2018

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The aim of the present study is to test the resource economic monopolization hypothesis and the hypothesis of monogamy using the shrimp Alpheus estuariensis as a model. The shrimps were collected in two areas in the Vaza-Barriz estuary, north-east Brazil, from August to November 2016. The average abundance of refuges was obtained through 30 random replicates. The shrimp presented a random distribution in both areas. Males and females found together showed a weak relation between their sizes, with males being larger than females. In addition, the cheliped of males grows proportionally more than that of females. The great abundance of refuges present in the environment, added to the aforementioned results, do not support the idea of refuge-guarding behaviour or monogamy. These results, which are in disagreement with those already found for some shrimps of the same family, genus, and even species, reinforce the idea that Alpheidae can be used as a model in the study of how environmental conditions are capable of shaping the social behaviour of a species.

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Section: Introductionmentioning

confidence: 99%