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Habitat selection and polymorphic status in populations of the shrimp Hippolyte obliquimanus Dana, 1852 (Decapoda: Caridea)

Grant number: 09/06675-4
Support type:Scholarships in Brazil - Master
Effective date (Start): August 01, 2009
Effective date (End): July 31, 2011
Field of knowledge:Biological Sciences - Ecology
Principal Investigator:Augusto Alberto Valero Flores
Grantee:Rafael Campos Duarte
Home Institution: Centro de Biologia Marinha (CEBIMAR). Universidade de São Paulo (USP). São Sebastião , SP, Brazil


Natural populations of the caridean shrimp Hippolyte obliquimanus are composed by different phenotypes exhibiting contrasting chromatic patterns. Such phenotypes correspond to alternative morphologies, indicating the existence of polymorphism in this species. Field sampling protocols and laboratory experiments will be conducted during this project to test possible mechanisms regulating the polymorphic condition. In a first stage, the distribution of the different morphotypes in shallow waters will be examined, across different depths and vegetated subtstrata, thus testing for an eventual spatial segregation of these shrimps in the field. In a second stage, laboratory experiments will be conducted to (i) verify whether shrimps alternate between morphotypes after molting - thus indicating an environmentally induced shift, in this case due to the characteristics of the algal cover - and, (ii) assess whether the natural distribution of morphotypes in the field can be explained by habitat selection, by using multiple-choice experiments.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DUARTE, RAFAEL C.; FLORES, AUGUSTO A. V. Morph-specific habitat and sex distribution in the caridean shrimp Hippolyte obliquimanus. Journal of the Marine Biological Association of the United Kingdom, v. 97, n. 2, p. 235-242, MAR 2017. Web of Science Citations: 7.
DUARTE, RAFAEL C.; STEVENS, MARTIN; FLORES, AUGUSTO A. V. Shape, colour plasticity, and habitat use indicate morph-specific camouflage strategies in a marine shrimp. BMC Evolutionary Biology, v. 16, OCT 18 2016. Web of Science Citations: 12.

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