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Registro Completo |
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
01/08/1992 |
Data da última atualização: |
12/07/2023 |
Autoria: |
THOMPSON, R. W.; TURNER, J. C. |
Título: |
Temporal geographic variation in the lambing season of bighorn sheep. |
Ano de publicação: |
1982 |
Fonte/Imprenta: |
Canadian Journal of Zoology, v. 60, n. 8, p. 1781-1793, Aug. 1982. |
DOI: |
https://doi.org/10.1139/z82-231 |
Idioma: |
Inglês |
Conteúdo: |
Abstract: Temporal geographic variation in lambing seasons was statistically assessed for 22 populations, including 5 ecological races, of North American bighorn sheep (Ovis canadensis ssp.) from the Canadian National Parks (52° N) to western Texas (30° N). Throughout their distribution, bighorn lambing occurs coincident with the period of vegetative development when the environmental regime ameliorates neonate survival. Analyses generally demonstrate later and shorter lambing seasons in higher latitudinal populations (P?0.001). Inception of lambing occurs later with colder temperatures, increased snowfall, at higher latitudes and elevations, and with later and shorter growing seasons . Additionally, a significant (P?0.001) divergence in the reproductive "strategy" (median onset and duration of lambing) exists between bighorn herds of the Sierra Nevada Mountains, California (37° N) and the Desert National Wildlife Range, Nevada (36° N) as a result of two distinct, but adjacent environmental regimes. Lambing in northern populations is cued to a brief, relatively predictable period of plant growth. Southern bighorn protract lambing such that some recruitment coincides with relatively unpredictable plant growth, triggered by erratic rains. |
Palavras-Chave: |
Comportamento reprodutivo. |
Thesagro: |
Ovino; Reprodução. |
Thesaurus Nal: |
Lambing; Reproduction; Reproductive performance; Seasons; Sheep. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 01968naa a2200241 a 4500 001 1522009 005 2023-07-12 008 1982 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1139/z82-231$2DOI 100 1 $aTHOMPSON, R. W. 245 $aTemporal geographic variation in the lambing season of bighorn sheep.$h[electronic resource] 260 $c1982 520 $aAbstract: Temporal geographic variation in lambing seasons was statistically assessed for 22 populations, including 5 ecological races, of North American bighorn sheep (Ovis canadensis ssp.) from the Canadian National Parks (52° N) to western Texas (30° N). Throughout their distribution, bighorn lambing occurs coincident with the period of vegetative development when the environmental regime ameliorates neonate survival. Analyses generally demonstrate later and shorter lambing seasons in higher latitudinal populations (P?<?0.001). Inception of lambing occurs later with colder temperatures, increased snowfall, at higher latitudes and elevations, and with later and shorter growing seasons . Additionally, a significant (P?<?0.001) divergence in the reproductive "strategy" (median onset and duration of lambing) exists between bighorn herds of the Sierra Nevada Mountains, California (37° N) and the Desert National Wildlife Range, Nevada (36° N) as a result of two distinct, but adjacent environmental regimes. Lambing in northern populations is cued to a brief, relatively predictable period of plant growth. Southern bighorn protract lambing such that some recruitment coincides with relatively unpredictable plant growth, triggered by erratic rains. 650 $aLambing 650 $aReproduction 650 $aReproductive performance 650 $aSeasons 650 $aSheep 650 $aOvino 650 $aReprodução 653 $aComportamento reprodutivo 700 1 $aTURNER, J. C. 773 $tCanadian Journal of Zoology$gv. 60, n. 8, p. 1781-1793, Aug. 1982.
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