Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Academia Brasileira de Ciências
2016
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=32744812016 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- High temperatures and absence of light affect the hatching of resting eggs of Daphnia in the tropics THÉCIA A.S.V. PAES ARNOLA C. RIETZLER DIEGO G.F. PUJONI PAULINA M. MAIA-BARBOSA Multidisciplinaria (Ciencias Naturales y Exactas) light diapause Cladocera ephippium temperature 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 in fl uence of different temperature and light conditions on hatching rates of Daphnia ambigua and Daphnia 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 in fl uence 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. 2016 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32744812016 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.1 Vol.88