Resumo
Nesting activity of the neotropical turtle Phrynops hilarii Duméril & Bibron, 1835 was studied from Feb/94 through Jan/95, with weekly visits at the Lami Biological Reserve (30º15'S, 51º05'W), Porto Alegre, Rio Grande do Sul, Brazil. Nesting behavior was observed 17 times on three different nest sites. Phrynops hilarii laid in average 11 eggs per clutch (10-14; sd±1; n=17), nests' depth ranged from 100 to 150 mm (x=121.53 mm.sd±12.31; n=17). The species presents stereotiped behaviour common to other Testudines. Temperature inside the nest, just after nesting, ranged between 20-31ºC (x=26.29ºC; sd±2.89; n=17); nest predation during this period was 82.35% (14 of 17 nests). From Aug/29 through Oct/03/95, 220 egg shells was collected next to 21 nests destructed by predators in the same sites. At the Reserve, the main nest predator is the nocturnal mammal Procyon cancrivorus Cuvier, 1798.
Testudines; Chelidae; Phrynops hilarii; egg predation; neotropical turtle; nesting behavior
Testudines; Chelidae; Phrynops hilarii; egg predation; neotropical turtle; nesting behavior
Atividade de nidificação de Phrynops Hilarii Duméril & Bibron (Testudines, Chelidae) na Reserva Biológica do Lami, Rio Grande do Sul, Brasil
Nesting activity of Phrynops Hilarii Duméril & Bibron (Testudines, Chelidae) at the Lami Biological Reserve, Rio Grande do Sul, Brazil
Clóvis Souza Bujes
Departamento de Zoologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul. 90046-900 Porto Alegre, Rio Grande do Sul, Brasil. E-mail: csbujes@conex.com.br
ABSTRACT
Nesting activity of the neotropical turtle Phrynops hilarii Duméril & Bibron, 1835 was studied from Feb/94 through Jan/95, with weekly visits at the Lami Biological Reserve (30º15'S, 51º05'W), Porto Alegre, Rio Grande do Sul, Brazil. Nesting behavior was observed 17 times on three different nest sites. Phrynops hilarii laid in average 11 eggs per clutch (10-14; sd±1; n=17), nests' depth ranged from 100 to 150 mm (x=121.53 mm.sd±12.31; n=17). The species presents stereotiped behaviour common to other Testudines. Temperature inside the nest, just after nesting, ranged between 20-31ºC (x=26.29ºC; sd±2.89; n=17); nest predation during this period was 82.35% (14 of 17 nests). From Aug/29 through Oct/03/95, 220 egg shells was collected next to 21 nests destructed by predators in the same sites. At the Reserve, the main nest predator is the nocturnal mammal Procyon cancrivorus Cuvier, 1798.
Key words: Testudines, Chelidae, Phrynops hilarii, egg predation, neotropical turtle, nesting behavior.
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Recebido em 15.V.1997; aceito em 03.XI.1998.
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Datas de Publicação
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Publicação nesta coleção
01 Jul 2009 -
Data do Fascículo
Dez 1998
Histórico
-
Recebido
15 Maio 1997 -
Aceito
03 Set 1998