Locomotor Activity Patterns in Ilybius fenestratus (Fabricius) (Coleoptera, Dytiscidae) in a Central Norwegian Lake, with Evidence for Breeding-Induced Arrhythmicity

Autor:	Dag Dolmen, John O. Solem
Rok vydání:	2002
Předmět:	education.field_of_study Larva biology Ecology Period (gene) Population Zoology Dytiscidae Fenestratus Aquatic Science Nocturnal biology.organism_classification Locomotor activity Insect Science education Diel vertical migration Ecology Evolution Behavior and Systematics
Zdroj:	Aquatic Insects. 24:207-211
ISSN:	1744-4152 0165-0424
Popis:	The diel activity of Ilybius fenestratus was studied in Malsj⊘en, a lake in S⊘r-Tr⊘ndelag, Central Norway (63°14'N, 10°26'E), during 1971–1972. Adults and larvae were sampled in activity traps every week during March–October and every 2–3 weeks during November–February. The traps were emptied every 2 hrs during a 24- hr period. The diel locomotor activity of I. fenestratus was clearly nocturnal, except in the second half of July, for the males also in the first half of July, when surprisingly the population showed an arrhythmic activity pattern. The arrhythmicity is connected with the mating and egg-laying period of the species. The larvae were also nocturnal in the autumn, but showed arrhythmicity under the ice during the winter.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ad78a2cf3a74910619731cea02e23cd2 https://doi.org/10.1076/aqin.24.3.207.8120 Zobrazit plný text záznamu