Consulta: subjectFacets:"Thermosensitive period"
Registros recuperados: 2
Data/hora: 05/06/2024 02:11:45

Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
Provedor de dados: 76
Autores: Bonach,Kelly; Malvasio,Adriana; Matushima,Eliana R.; Verdade,Luciano M.
This study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa (Schweigger, 1812). Despite the relatively small sample size we infer that: a) nests of P. expansa in the central Araguaia river have a lower incubation temperature than nests located further south; however, incubation period is shorter, hatching success rate is lower and clutch-size is larger; b) Podocnemis expansa may present a female-male-female (FMF) pattern of temperature sex-determination (TSD); c)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: TSD; Thermosensitive period; Sex determination; Reproductive biology; Turtles.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001

Low temperature has opposite effects on sex determination in a marine fish at the larval/postlarval and juvenile stages
Provedor de dados: 5
Autores: Vandeputte, Marc; Clota, Frederic; Sadoul, Bastien; Blanc, Marie-odile; Blondeau-bidet, Eva; Bégout, Marie-laure; Cousin, Xavier; Geffroy, Benjamin.
Temperature‐dependent sex determination (TSD) can be observed in multiple reptile and fish species. It is adaptive when varying environmental conditions advantage either males or females. A good knowledge of the thermosensitive period is key to understand how environmental changes may lead to changes in population sex ratio. Here, by manipulating temperature during development, we confirm that cold temperature (16°C) increases the proportion of fish that develop as females in European sea bass (Dicentrarchus labrax) until 56 days posthatching, but show that it has an opposite effect at later stages, with the proportion of males reaching ~90% after 230 days at 16°C. This is the first observation of opposite effects of temperature at different time periods...
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Fish; Sex ratio; Temperature-dependent sex determination; Thermosensitive period; TSD.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/76965/78184.pdf