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Reproductive potential of uçá-crab, Ucides cordatus (Linnaeus, 1763) (Brachyura: Ucididae), in mangroves with different levels of conservation, in the São Paulo State, Brazil

Grant number: 15/19476-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2015
Effective date (End): November 30, 2017
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal Investigator:Marcelo Antonio Amaro Pinheiro
Grantee:Marcio Camargo Araujo João
Host Institution: Instituto de Biociências (IB-CLP). Universidade Estadual Paulista (UNESP). Campus Experimental do Litoral Paulista. São Vicente , SP, Brazil


Mangroves act as nurseries for many animal species, to take refuge, find food and suitable place to reproduction and growth processes. It is one of the coastal ecosystems more impacted by humans, and can promote depletion or optimization of reproductive potential in some species. The present study aims to evaluate the fecundity of the uçá-crab in mangroves with distinct conservation level, being a pristine (Jureía-Itatins Ecological Station, Peruíbe Municipality) and other historically contaminated (Cubatão Mnicipality). Will be collected 70 ovigerous females by mangrove, in a same reproductive period (November to March). The females will be submitted to biometry (CW, cephalothoracic width; WW, wet weight; and WWE, wet weight of eggs). The total number of eggs by female will be quantified by gravimetric method, with dehydration, cleaning, weight of the dry eggs (WDE) and quantification of three sub-samples (0,5mg) per female. The total number of eggs (EN) will be obtained by a simple three rule, with the points of the relationship ENxCW fitted to function y=axb. The fecundity equations will be log-transformed and confronted by the t-test (parallelism/coincidence of straights), with the data submitted to a procedure for exclusion of size effect, and further evaluation of a depletion or potentialization of the reproduction of this species.

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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)
MAIA SANTOS, LUCIANA CAVALCANTI; BOOS, HARRY; SANO, EDSON EYJI; DE FREITAS, DANIEL MORAES; AMARO PINHEIRO, MARCELO ANTONIO. Management and conservation of the land crab Cardisoma guanhumi (Crustacea: Gecarcinidae) based on environmental and fishery factors: a case study in Brazil. WETLANDS ECOLOGY AND MANAGEMENT, v. 30, n. 2, p. 15-pg., . (15/19476-0)

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