Food selection by a mangrove crab: temporal changes in fasted animals

Autor(es)

Christofoletti, Ronaldo A. ^{[1, 2]} ; Hattori, Gustavo Y. ^{[2, 3]} ; Pinheiro, Marcelo A. A. ^{[2, 4]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Paulo, Inst Mar, BR-11030400 Santos, SP - Brazil

^[2] Univ Estadual Paulista, UNESP, FCAV, Programa Posgrad Zootecnia, Area Prod Anim, BR-14884900 Jaboticabal, SP - Brazil

^[3] Univ Fed Amazonas, Inst Ciencias Exatas & Tecnol, BR-69103128 Itacoatiara, AM - Brazil

^[4] Univ Estadual Paulista, UNESP, Grp Pesquisa Biol Crustaceos CRUSTA, BR-11330900 Sao Vicente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Hydrobiologia; v. 702, n. 1, p. 63-72, FEB 2013.
• Citações Web of Science: 15

Resumo

The feeding choices of the mangrove crab Ucides cordatus for various mangrove plant leaves (Avicennia schaueriana, Laguncularia racemosa, and Rhizophora mangle) at different ages (mature, senescent pre-abscission, and decomposing leaves) were examined. In a controlled experiment set in a mangrove area, we evaluated crab selection for different plant leaves by analyzing foraging rate (number of leaves with predation marks) and leaf consumption. Crabs were housed individually in plastic containers and after a 3-day fast supplied with leaf fragments every 24 h for 72 h. Uneaten leaves were removed before each new food offering. No food selection was observed in the first day, but after this period, senescent leaves, which have a high polyphenol content, were rejected. On the third day, an interactive effect between plant species and leaf age was shown to affect leaf selection, with mature leaves of A. schaueriana and L. racemosa being more selected than the other treatments. This observation was consistent across crab sexes and ages. Our results show that food selection by this mangrove crab changes through time in fasted animals, suggesting that this variable must be controlled in food preference studies. (AU)

• Processo FAPESP: 02/11580-3 - Dieta do caranguejo-uçá Ucides cordatus (Linnaeus, 1763) (Crustacea, Brachyura, Ocypodidae) em Iguape (SP)
• Beneficiário: Ronaldo Adriano Christofoletti
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 02/05614-2 - Projeto Uçá II: biologia e manejo do caranguejo-uçá, Ucides cordatus (Linnaeus, 1763) (Crustacea, Decapoda, Brachyura)
• Beneficiário: Marcelo Antonio Amaro Pinheiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular