Ram rut-involvement in a hunted population of mouflons

• Autorzy: Bon R. , Gonzalez G. , Bosch M.D. , Cugnasse J.M.
• Języki publikacji: EN

Abstrakty

EN

This study was conducted during the rut in a protected valley (Vialais) inhabited by one permanent population of ewes. This valley formes part of a larger hunted area. Rams which segregate from ewes entered the Vialais during the pre-rut, first young rams while the oldest rams arrived later. These latter stay in the company of ewes only when most lambs are conceived. The removal of old males shifted the male population structure, favoring young males. Old males tended a low proportion of ewes in mating groups which was used as an index of the male mating success. A larger proportion of young males successfully tended estrous ewes than in protected populations of wild sheep. Despite that, the population is highly productive which contradicts the arguments that precocious involment of young males in reproduction may be detrimental to population productivity.

Słowa kluczowe

EN

mouflon; Ovis gmelini; rut; population; ram

• Wydawca: -
• Czasopismo: Acta Theriologica
• Rocznik: 1992
• Tom: 37
• Numer: 1-2
• Opis fizyczny: p.63-71,fig.,ref.

Twórcy

autor

Bon R.

• Institut de Recherche sur les Grands Mammiferes, B.P. 27, 31326 Castanet-Tolosan, France

autor

Gonzalez G.

autor

Bosch M.D.

autor

Cugnasse J.M.

Bibliografia

• Auvray F. 1983. Recherche sur l'éco-éhologie du mouflon (Ovis ammon musimon Schreber, 1782) dans le massif du Caroux-Espinouse (Hérault) en vue de définir de nouveaux sites ďaccueil. Thèse 3ème cycle, Univ. Sciences et Techniques du Languedoc, Montpellier: 1 - 176. Bon R. and Campan R. 1989. Social tendencies of the Corsican mouflon in the Caroux-Espinouse massif (South of France). Behav. Process. 19: 57 - 78.
• Bon R., Gonzalez G., Im S. and Badia J. 1990. Seasonal grouping in female mouflons in relation to food availability. Ethology 86: 224 - 236. Bon R., Cugnasse J. M., Dubray D., Gibert P., Houard T. and Rigaud P. 1991. Le mouflon de Corse. Rev. Ecol. (Terre Vie), Suppl. 6: 67 - 110.
• Byers J. A. and Kitchen D. W. 1988. Mating system shift in a pronghorn population. Behav. Ecol. Sociobiol. 22: 355 - 360.
• Cugnasse J. M., Garcia M. and Veyrac T. 1985. Contribution à l'étude de la biologie de la reproduction du mouflon (Ovis ammon musimon), par examens post-mortem, dans le massif du Caroux- Espinouse. Bull. mens. ONC 89: 33 - 35.
• Dubois M., Gerard J. F. and Maublanc M. L. 1992. Seasonal movements of female Corsican mouflon (Ovis ammon) in a Mediterranean mountain range, southern France. Behav. Process. 26: 155 - 166.
• Emlen S. T. and Oring L. W. 1977. Ecology, sexual selection, and the evolution of mating systems. Science 197: 215 - 223.
• Festa-Bianchet M. 1989. Survival of male bighorn sheep in southwestern Alberta. J. Wildl. Manage. 53: 259-263.
• Festa-Bianchet M. 1991. The social system of bighorn sheep: grouping patterns, kinship and female dominance rank. Anim. Behav. 42: 71 - 82.
• Foreyt W. J. 1988. Reproduction of Rocky Mountain sheep {Ovis c. canadensis) in Washington: birth dates, yearling ram reproduction and neonatal diseases. Northwest Science 62: 161 — 164.
• Geist V. 1971. Mountain sheep: a study in behavior and evolution. Univ. Chicago Press, Chicago: 1 - 383.
• Gibson R. M. and Guinness F. E. 1980. Differential reproduction among red deer (Cervus elaphus) stags on Rhum. J. Anim. Ecol. 49: 199 - 208.
• Gosling L. M. 1986. The evolution of mating strategies in male antelopes. [In: Ecological Aspects of Social Evolution. Birds and Mammals. D. I. Rubenstein and R. W. Wrangham, eds]. Princeton University Press, Princeton: 282 - 302.
• Gray G. G. and Simpson C. D. 1982. Group dynamics of free-ranging Barbary sheep in Texas. J. Wildl. Manage. 46: 1096 - 1101.
• Grubb P. 1974. The rut and behaviour of Soay rams. [In: Island survivals: the ecology of the Soay sheep of St Kilda. P. A. Jewell, C. Milner and J. M. Boyde, eds]. Athlone Press, London: 195 - 223.
• Grubb P. and Jewell P. A. 1973. The rut and the occurence of estrus in the Soay sheep on St Kilda. J. Reprod. Fert. 19: 491 - 502.
• Heimer W. E., Watson S. M. and Smith III T. C. 1984. Excess ram mortality in a heavily hunted Dall sheep population. Symp. North. Wild Sheep and Goat Counc. 4: 425 - 432.
• Heimer W. E. and Watson S. M. 1986. Harvest strategy panel: maximizing ram harvests. Symp. North. Wild Sheep and Goat Counc. 5: 24 - 33.
• Hogg J. T. 1984. Mating in bighorn sheep: multiple creative male strategies. Science 225: 526 - 529.
• Hogg J. T. 1987. Intrasexual competition and mate choice in Rocky mountain bighorn sheep. Ethology 75: 119 - 144.
• Jewell P. A. and Grubb P. 1974. The mating cycle, the onset of estrus and conception in Soay sheep. [In: Island survivals: the ecology of the Soay sheep of St Kilda. P. A. Jewell, C. Milner and J. M. Boyde, eds]. Athlone Press, London: 224 - 241.
• Jewell P. A., Hall S. J. G. and Rosenberg M. M. 1986. Multiple mating and siring success during natural estrus in the ewe. J. Reprod. Fert. 77: 81 - 89.
• Machlis L., Dodd P. W. D. and Fentress J. C. 1985. The pooling fallacy: problems arising when individuals contribute more than one observation to the data set. Z. Tierpsychol. 68: 201 - 214.
• Peek J. M., Van Vallenberghe V. and Miquelle D. G. 1986. Intensity of interactions between rutting bull moose in central Alaska. J. Mammal. 67: 423 - 426.
• Pfeffer P. 1967. Le Mouflon de Corse (Ovis ammon musimon Schreber, 1782); position systématique, écologie et éthologie comparées. Mammalia, Suppl. 31: 1 - 262.
• Rubenstein D. I. 1986. Ecology and sociality in horses and zebras. [In: Ecological Aspects of Social Evolution. Birds and Mammals. D. I. Rubenstein and R. W. Wrangham, eds]. Princeton University Press, Princeton: 282 - 302.
• Shackleton D. M. 1991. Social maturation and productivity in bighorn sheep: are young males incompetent. Appl. Anim. Behav. Sci. 29: 173 - 184.
• Valdez R., Cardenas M. and Sanchez J. 1991. Disruptive mating behavior by subadult Armenian wild sheep in Iran. Appl. Anim. Behav. Sci. 29: 165 - 171.