Autoradiographic studies of wool growth rate in Wensleydale crossbred lambs: absence of a marked circadian rhythm

Autor:	G. C. Priestley, M. L. Ryder
Rok vydání:	1981
Předmět:	Animal science Wool Animal Science and Zoology Circadian rhythm Wool fibre Growth rate Biology Linear growth Crossbreed
Zdroj:	Animal Science. 33:259-263
ISSN:	1748-748X 1357-7298
DOI:	10.1017/s0003356100031639
Popis:	The linear growth rate of wool on three sites on each of six Wenslcydale × Blackface lambs was measured by wool fibre autoradiography following 11 injections of 35S-cystine. The first injection was given at 09.00 h, so that alternate 36h intervals between injections represented predominantly day (09.00 to 21.00h) or night (21.00 to 09.00 h). The overall mean growth rates on shoulder, mid-side and breech were 0·83, 0·96 and 0·95 mm/day. Differences between day and night growth rates were very small (proportionallyMid-side wool growth rates in a second group of three crossbred longwool lambs averaged 0·79, 100 and 1·14 mm/day and were relatively stable over a period of several months.
Databáze:	OpenAIRE
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