References in periodicals archive ?
nana appears to initiate its gamogenesis earlier in nutrient rich and dystrophic lakes (Fig.
However, it cannot be entirely ruled out that the differences in the timing of gamogenesis between the lakes reflect yearly variation (cf.
Weak summer gamogenesis was found only in three lakes: in Alona affinis in one lake and in A.
The general uniformity of the induction time and duration of autumnal gamogenesis among limnologically different lakes supports the theory that the main stimuli are shortening photoperiod and declining temperature.