Zobrazeno 1 - 10
of 14
pro vyhledávání: '"William D. Wishart"'
Autor:
Céline H. Bérubé, Jon T. Jorgenson, Marco Festa-Bianchet, Christine Portier, William D. Wishart
Publikováno v:
Canadian Journal of Zoology. 75:1372-1379
In ungulates, body mass is often positively correlated with juvenile survival, but little is known of whether body mass affects survival of other age-classes. We studied two marked populations of bighorn sheep (Ovis canadensis) in Alberta, Canada, to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e6863465f899ca7c943b03e7f46319c
https://doi.org/10.1139/z97-763
https://doi.org/10.1139/z97-763
Publikováno v:
Ecology. 78:1019-1032
Longitudinal studies of survival are valuable because age-specific survival affects population dynamics and the evolution of several life history traits. We used capture–mark–recapture models to assess the relationship between survival and sex, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7a9362a0e630b9966ba78f104a63f20
https://doi.org/10.1890/0012-9658(1997)078[1019:eoasda]2.0.co
https://doi.org/10.1890/0012-9658(1997)078[1019:eoasda]2.0.co
Publikováno v:
Canadian Journal of Zoology. 74:330-342
Individually marked bighorn sheep (Ovis canadensis) were monitored to determine how seasonal and lifetime changes in mass affected the development of sexual dimorphism, and to what extent mass at a given age could predict mass of the same sheep at a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41d70869a88fd3282f81a8fcf070f80e
https://doi.org/10.1139/z96-041
https://doi.org/10.1139/z96-041
Publikováno v:
Ecology. 76:871-881
We investigated the life history consequences of age at primiparity in two marked populations of bighorn sheep (Ovis canadensis), studied for 19 and 12 yr. Some ewes first lambed at 2 yr of age, others at 3 or 4 yr. Lambs of 2-yr-old ewes were smalle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::259cda03cbc96536d644b9f4466c3835
https://doi.org/10.2307/1939352
https://doi.org/10.2307/1939352
Publikováno v:
Canadian Journal of Zoology. 71:2509-2517
The factors affecting variation in age at first reproduction of bighorn ewes (Ovis canadensis) were investigated in two marked populations in Alberta. One population was studied for 20 years, the other for 11 years. As yearlings, females that lactate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2edf9151b317d70867cb7f4d0a377d95
https://doi.org/10.1139/z93-344
https://doi.org/10.1139/z93-344
Publikováno v:
The Journal of Wildlife Management. 62:1011
Trophy hunting is a management goal for many populations of ungulates and has important implications for conservation because of the economic value of trophy males. To determine whether population density affected horn growth of males, a marked popul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46ed0562c0c021012c520de4382225e2
https://doi.org/10.2307/3802554
https://doi.org/10.2307/3802554
Publikováno v:
The Journal of Wildlife Management. 57:429
We wanted to test whether ewe hunting would cause a decline in population size or in trophy ram production, and whether a reduction in ewe density would increase the size of ram horns. Thus, we examined the consequences of a bighorn sheep (Ovis canad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00beacad9a68c7cd9a2774e99dfb6b7f
https://doi.org/10.2307/3809267
https://doi.org/10.2307/3809267
Publikováno v:
Canadian Journal of Zoology. 66:1664-1671
Fertility, spermatogenesis, and sperm phenotype were investigated in three hybrid deer (Odocoileus virginianus dacotensis × Odocoileus hemionus hemionus) and a yak × domestic cow hybrid (Bos mutus (grunniens) × Bos primigenius (taurus)) using hist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8860191aceae1bbe5f470f8c5feab743
https://doi.org/10.1139/z88-240
https://doi.org/10.1139/z88-240
Publikováno v:
Canadian Journal of Zoology. 67:2493-2496
Selenium levels and glutathione peroxidase (GSH-Px) activity were determined in the blood of wild and captive herds of bighorn sheep (Ovis canadensis), as well as in one wild mountain goat (Oreamnos americanus) herd. No significant relationship was e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::60297652f8c6fa7cc704ca9ea50b3920
https://doi.org/10.1139/z89-352
https://doi.org/10.1139/z89-352
Autor:
William D. Wishart
Publikováno v:
Journal of Mammalogy. 61:716-719
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73eb373c89823b5c1a9709a74ee78f12
https://doi.org/10.2307/1380318
https://doi.org/10.2307/1380318