Calanoid copepod eggs in sea-bottom muds. IV. Effects of some environmental factors on the hatching of resting eggs

1979 ◽  
Vol 51 (2) ◽  
pp. 151-156 ◽  
Author(s):  
S. Uye ◽  
S. Kasahara ◽  
T. Onb�
Keyword(s):  
Environmental Factors ◽  
Calanoid Copepod ◽  
Resting Eggs ◽  
Sea Bottom ◽  
Copepod Eggs

Calanoid copepod eggs in sea-bottom muds

1974 ◽  
Vol 26 (2) ◽  
pp. 167-171 ◽  
Author(s):  
S. Kasahara ◽  
S. Uye ◽  
T. Onb�
Keyword(s):  
Calanoid Copepod ◽  
Sea Bottom ◽  
Copepod Eggs

scholarly journals High temperatures and absence of light affect the hatching of resting eggs of Daphnia in the tropics

2016 ◽  
Vol 88 (1) ◽  
pp. 179-186 ◽  
Author(s):  
Thécia A.S.V. Paes ◽  
Arnola C. Rietzler ◽  
Diego G.F. Pujoni ◽  
Paulina M. Maia-Barbosa
Keyword(s):  
Environmental Factors ◽  
High Temperatures ◽  
Aquatic Ecosystems ◽  
Resting Eggs ◽  
Negative Influence ◽  
Southeastern Brazil ◽  
Light Conditions ◽  
Tropical Environments ◽  
The Tropics ◽  
Hatching Rates

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.

Occurrence, viability and significance of resting eggs of the calanoid copepod Labidocera aestiva

1975 ◽  
Vol 31 (4) ◽  
pp. 335-337 ◽  
Author(s):  
G. D. Grice ◽  
V. R. Gibson
Keyword(s):  
Calanoid Copepod ◽  
Resting Eggs
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