Seasonal occurrence and diel locomotor activity in littoral Cladocera in a mesohumic lake in Norway
Identifieur interne : 001212 ( Main/Exploration ); précédent : 001211; suivant : 001213Seasonal occurrence and diel locomotor activity in littoral Cladocera in a mesohumic lake in Norway
Auteurs : Ivar Koksvik [Norvège]Source :
- Hydrobiologia [ 0018-8158 ] ; 1995-07-01.
English descriptors
Abstract
Abstract: In situ studies were carried out using activity traps during the course of one year. Of 35 species recorded, only one, Alonella nana, was found to be perennial. The majority of species hatched in May/June, at temperatures of 4–15 °C and disappeared in October/November at temperatures of 1–6 °C. Males were found in 23 species, and always at the end of the active period. No species were found to have more than one period of gamogenesis. Day activity, which was most intense in the afternoon, seemed to be the common pattern. The activity pattern in some species seemed to be influenced by the presence of males.
Url:
DOI: 10.1007/BF00032012
Affiliations:
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