Consulta: subjectFacets:"Ranidae"
Registros recuperados: 3
Data/hora: 10/06/2024 13:39:58

Schooling and swimming behaviors of Hyla semilineata tadpoles (Anura, Hylidae)
Provedor de dados: 76
Autores: Heursel,Anne d'; Haddad,Célio F. B.
The schooling behavior of Hyla semilineata Spix, 1824 tadpoles is described. Experiments were carried out both in the natural environment and under controlled conditions to quantify the constant movement of these tadpoles. Bullfrog tadpoles (Rana catesbeiana Shaw, 1802), similar in size to the H. semilineata larvae, were used as controls in the experiments. Hyla semilineata tadpoles remained stationary for one sixth of the time that the bullfrog tadpoles did and the number of individuals of H. semilineata moving at any given moment was about seven times greater. The schooling behavior and constant swimming behavior of these tadpoles may enhance the effect of their warning coloration.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hyla; Rana; Ranidae; Larvae; Brazil.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212002000100010

The choice of external morphological characters and developmental stages for tadpole-based anuran taxonomy: a case study in Rana (Sylvirana) nigrovittata (Blyth, 1855) (Amphibia, Anura, Ranidae)
Provedor de dados: 16
Autores: Grosjean, S.
The morphology of tadpoles has long received too little attention in taxonomic and phylogenetic contexts, beyond the use of Orton’s general tadpole types, despite the potential of larval characters for resolving problems in systematics. A possible explanation for this neglect is the ontogenetic variation of external morphology. In order to understand the value of larval characters in taxonomy and systematics, it is necessary to determine the developmental stage at which characters reach their definitive size, form and colour before meaningful comparisons can be made within and between species. Here I use the tadpole of Rana (Sylvirana) nigrovittata as a model organism to assess ontogenetic character variation. Morphometric measurements were taken, and...
Tipo: Article / Letter to the editor
Palavras-chave: Tadpole; Rana (Sylvirana) nigrovittata; Ranidae; External morphology; Morphometry; Internal buccal features; Ontogeny; Character variation; Vietnam; 42.82.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/214341

On the occurrence and identity of triploids of Rana kl. esculenta Linnaeus and R. lessonae Camerano in The Netherlands (Anura: Ranidae)
Provedor de dados: 16
Autores: Blommers-Schlösser, Rose M.A.
According to electrophoresis and erythrocyte size the genotypes of 756 waterfrogs, collected during 1986—1988 in 54 localities in The Netherlands, were classified as belonging to 5 different genotypes: 331 diploid R. lessonae (LL), 5 triploid R. lessonae (LLL), 250 diploid R. kl. esculenta (LR), 133 triploid R. kl. esculenta (LLR), and 37 diploid R. ridibunda (RR). The occurrence of triploid R. kl. esculenta in The Netherlands is reported for the first time and triploid R. lessonae has not yet been reported previously. There are indications that LL gametes could be produced by LLR triploids and LL diploids. R. kl. esculenta in R. kl. esculenta and R. ridibunda — R. kl. esculenta populations of the western regions seems to be exclusively triploid, whereas...
Tipo: Article / Letter to the editor
Palavras-chave: Ranidae; Rana lessonae; R. ridibunda; R. kl. esculenta; Erythrocyte size; Triploidy; Genotype; Biometry; Distribution.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504567