Vertical distribution of limnetic copepods in relation to the temporal variability of thermocline depth in a tropical caldera lake

Abstract

The thermocline depth of Lake Taal and its effect on the vertical migration patterns of two limnetic copepod species during the intermediate monsoon season were investigated. Most of the diel vertical migration patterns were normal. Reverse DVM, which was exhibited by some adult copepods, was observed when wind speed changed during the sampling period. Lake Taal started to exhibit atelomixis as the wind speed started to fluctuate. Diel vertical migration of the copepods was affected by the prevailing atelomixis.