Effects of dusk and dawn on locomotor activity rhythms in the norway lobster Nephrops norvegicus

Autor:	E. Naylor, R. D. Hammond
Rok vydání:	1977
Předmět:	Ecology Endogenous rhythms fungi Zoology Dusk Aquatic Science Biology Burrow biology.organism_classification Locomotor activity Rhythm Nephrops norvegicus parasitic diseases Darkness sense organs Ecology Evolution Behavior and Systematics
Zdroj:	Marine Biology. 39:253-260
ISSN:	1432-1793 0025-3162
DOI:	10.1007/bf00390999
Popis:	The endogenous locomotor activity rhythm of Nephrops norvegicus (L.) shows peaks during darkness, around 3 h after dusk. At the peaks, activity occurs mainly within the burrow, although the prawns repeatedly vacate the burrows during the same periods. The phase of the rhythm shifts with a change of light-dark regime and in response to changed timing of “dusk” when “dawn” is fixed. Activity is suppressed immediately at dawn, but recommences before complete darkness during gradually reduced light at simulated dusk. This difference in response to light at dusk and dawn indicates phase responsiveness which is characteristic of endogenous rhythms entrained by light. The light-entrained endogenous rhythm is complementary to the rhythm of emergence which, reflected in commercial catches, appears to be controlled by exogenous factors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71df69c131ea5a6c8ea236a0a1893b1c https://doi.org/10.1007/bf00390999 Zobrazit plný text záznamu Full text from SpringerLink