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Boletim do Instituto Oceanográfico

Print version ISSN 0373-5524

Bol. Inst. Oceanogr. vol.32 no.2 São Paulo  1983

http://dx.doi.org/10.1590/S0373-55241983000200011 

NOTAS

 

Aspectos de comportamento alimentar e dieta da tartaruga marinha, Chelonia mydas no litoral norte paulista

 

Some aspects on feeding behaviour of the green turtle, Chelonia mydas, in the northern littoral of State of São Paulo

 

 

Ivan Sazima*; Marlies Sazima*

Universidade Estadual de Campinas

 

 


Descritores: Hábitos alimentares, Herbívoros, Algas, Conteúdo do tubo digestivo, Pastejo, Chelonia mydas, Costa sudeste-Brasil.


SYNOPSIS

Feeding behavior of immature green turtles, Chelonia mydas, has been observed on rocky shores along the northern part of State of São Paulo, southeastern Brazil. This turtle forages on underwater ledges, at depths of 1 to 3 m and grazes on benthic algae. The turtle seems to visually scan the algae during feeding and moves slowly, walking from one patch of vegetation to another. Gut contents of four individuals (331-452 mmCCL) consisted mainly of red and brown algae. Comparisons between gut contents and algae growing at the grazing sites, together with scanning behavior suggest selective feeding. Syntopic large herbivorous fishes of the genera Kyphosus, Sparisma, and Acanthurus showed little feeding overlap with the green turtle.

Descriptors: Feeding behavior, Herbivores, Seaweeds, Gut contents, Grazing, Chelonia mydas, Southeast coast-Brazil.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

Agradecimentos

Somos gratos a José de Oliveira e César Aranha, por apoio nos trabalhos de campo e laboratório; a Eurico C. de Oliveira Filho e Da. Mathilde G. Joly, por facilidades e apoio; a J. Semir e C. Zamprogno, por sugestões e leitura do manuscrito; ao CNPq, por apoio financeiro.

 

Referências bibliográficas

BJORNDAL, K. A. 1979. Cellulose digestion and volatile fatty acid production in the green turtle, Chelonia mydas. Comp. Biochem. Physiol., 63: 127-133.         [ Links ]

BOOTH, J. & PETERS, J. A. 1972. Behavioural studies on the green turtle (Chelonia mydas) in the sea. Anim. Behav., 20:808-812.         [ Links ]

FERREIRA, M. M. 1968. Sobre a alimentação da aruanã, Chelonia mydas, ao longo da costa do Estado do Ceará. Arqs Estaç. Biol. mar. Univ. Ceará, 5:83-86.         [ Links ]

HIRTH, H. F. 1971. Synopsis of biological data on the green turtle, Chelonia mydas (Linnaeus) 1758. FAO. Fish. Synop., 85:pag. var.         [ Links ]

JOLY, A. B. 1965. Flora do litoral norte do Estado de São Paulo e regiões circunvizinhas. Bolm Fac. Filos. Cienc Letr. Univ. S Paulo, (294), Bot., 21:1-393.         [ Links ]

MORTIMER, J. A. 1981. The feeding ecology of the West Caribbean green turtle (Chelonia mydas) in Nicaragua. Biotropica, 13(1):49-58.         [ Links ]

PAINE, R. T. & VADAS, R. L. 1969. Calorific values of benthic marine algae and their postulated relation to invertebrate food preference. Mar. Biol., 4:79-86.         [ Links ]

PRITCHARD, C. H. 1971. Galapagos sea turtles - preliminary findings. J. Herp., 5(1-2):1-9.         [ Links ]

RANDALL, J. E. 1965. Grazing effect on sea grasses by herbivorous reef fishes in the West Indies. Ecology, 46(3):255-260.         [ Links ]

WORLD WILDLIFE FUND. 1982. Proposta de procedimento internacional para a conservação das tartarugas marinhas. Bolm FBCN, 17:62-69.         [ Links ]

 

 

(Recebido 12-jul-1983; aceito 26-mar-1984)

 

 

(*) Departamentos de Zoologia e Botânica, Universidade Estadual de Campinas, CP 6109 - 13100-Campinas, SP.

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