Data/hora: 01/06/2024 06:46:19

Provedor de dados: 	42	
País: 	Brazil	
Título: 	High temperatures and absence of light affect the hatching of resting eggs of Daphnia in the tropics	
Autores: 	Paes,Thécia A.S.V.; Rietzler,Arnola C.; Pujoni,Diego G.F.; Maia-Barbosa,Paulina M.	
Data: 	2016-03-01	
Ano: 	2016	
Palavras-chave: 	Cladocera; Diapause; Ephippium; Light; Temperature; Tropical aquatic ecosystems.	
Resumo: 	Temperature and light are acknowledged as important factors for hatching of resting eggs. The knowledge of how they affect hatching rates of this type of egg is important for the comprehension of the consequences of warming waters in recolonization of aquatic ecosystems dependent on dormant populations. This study aimed at comparing the influence of different temperature and light conditions on hatching rates of Daphnia ambigua andDaphnia laevis resting eggs from tropical environments. The ephippia were collected in the sediment of three aquatic ecosystems, in southeastern Brazil. For each lake, the resting eggs were exposed to temperatures of 20, 24, 28 and 32 °C, under light (12 h photoperiod) and dark conditions. The results showed that the absence of light and high temperatures have a negative influence on the hatching rates. Statistical differences for hatching rates were also found when comparing the studied ecosystems (ranging from 0.6 to 31%), indicating the importance of local environmental factors for diapause and maintenance of active populations.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100179	
Editor: 	Academia Brasileira de Ciências	
Relação: 	10.1590/0001-3765201620140595	
Formato: 	text/html	
Fonte: 	Anais da Academia Brasileira de Ciências  v.88 n.1 2016	
Fonte: 	info:eu-repo/semantics/openAccess