A putative effect of ambient temperature during the rut on time of calving in young red deer hinds

Autor:	P. D. Johnstone, M.W. Fisher
Rok vydání:	2002
Předmět:	photoperiodism Rut Ecology Period (gene) Soil Science Ice calving Plant Science Seasonality Biology medicine.disease Animal science medicine Animal Science and Zoology Agronomy and Crop Science
Zdroj:	New Zealand Journal of Agricultural Research. 45:305-308
ISSN:	1175-8775 0028-8233
DOI:	10.1080/00288233.2002.9513520
Popis:	The principle cue entraining circannual environmental rhythms and reproductive function in red deer is photoperiod, but other factors probably play important roles in modifying seasonality. Examination of calving records of untreated, first‐calving hinds over a 10‐year period revealed year‐to‐year variation in the mean calving date. Most variation was due to individual hinds, however a significant (P < 0.05) influence of the mean minimum temperature during the early rutting period on calving date was apparent with colder temperatures associated with slightly earlier mean calving dates.
Databáze:	OpenAIRE
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