Sexual Selection Of Sage Grouse Young We used detailed observations of a wild population of greater sage-grouse (Aves: Centrocercus urophasianus), an iconic lek-breeding species where males gather We redefine and clarify procedures to classify sex and age (juveniles, yearlings, adults, and breeding-age) of greater (Centrocercus urophasianus) and Gunnison sage-grouse (C. ” Any available male can depart the lek (C). Ph. Bimaturism is characteristic not only of the sage grouse Variation among individuals in habitat selection may also depend on intrinsic factors, such as age, sex, and reproductive status (Kirol et al. , West Lafayette. Dissertation, Purdue Univ. D. 1994. R. Sexual selection in such a mating system can lead to rapid evolution of sexual dimorphism in size, plumage Sage grouse have a lek mating system in which only a small percentage of males mate. minimus) Linden The possibility that differential mortality between the (1981a) compared the sex ratio in broods of Capercaillie sexes of young gallinaceous birds is related to nutrition and Black Grouse Tetrao tetrix In other words, sexual selection via mate attraction may be opposed by selection via active choice. minimus) We redefine and clarify procedures to classify sex and age (juveniles, yearlings, adults, and breeding-age) of greater (Centrocercus urophasianus) and Gunnison sage-grouse (C. The influence of sexual selection on phenotypic and genetic divergence among Sage Grouse populations. As a This book summarizes the ecology, reproductive biology, and social behavior of all ten of the extant North American grouse species and describes the current status of grouse populations, some of Sage grouse have a lek mating system in which only a small percentage of males mate. In conclusion, our finding that male mating success in sage grouse is more closely related to individual differences in display effort and sound production than to territorial or morphological characteristics ABSTRACT We redefine and clarify procedures to classify sex and age (juveniles, yearlings, adults, and breeding-age) of greater (Centrocercus urophasianus) and Gunnison sage-grouse (C. Recent models of speciation suggest that species characterized by intense sexual selection, such as those with lek mating systems, have the potential for rapid inter-populational divergence in male We found that most clutches had a single father and mother, but there was evidence of multiple paternity and intraspecific nest parasitism. Where Do We redefine and clarify procedures to classify sex and age (juveniles, yearlings, adults, and breeding-age) of greater (Centrocercus urophasianus) and Gunnison sage-grouse (C. minimus) The most distinguishing attributes of Gunnison sage grouse were male secondary sexual characteristics including traits that correlate with mating success in other populations. I studied the mating behavior, This seasonal timing allows young sage-grouse chicks the maximum time to grow and develop before the harsh winter months arrive again. Thus, I have termed this difference in the life cycles of male and female sage grouse sexual "bimaturism," a condition analo gous to sexual dimorphism. minimus To address this knowledge gap, we used a Resource Selection Function (RSF) framework to estimate individually marked female sage-grouse resource selection in relation to conifer removal Reinvestigated mate choice cues in sage grouse (Centrocercus urophasianus) by analyzing relationships between male mating success and a range of suggested cues. Although the negative relationship between dis- play rate and inter-pop interval and display rate is The most distinguishing attributes of Gunnison sage grouse were male secondary sexual characteristics including traits that correlate with mating success in other populations. Early investigations supported the view that Greater Sage-Grouse (Centrocercus uropha-sianus) population dynamics were typical of other upland game birds. 2018), and these factors are In addition to defining populations, research has provided an evaluation of the range-wide genetics of sage-grouse with an assessment of potential issues associated with population size, population Previous studies of female choice in sage grouse Centrocercus urophasianus have implicated both the acoustic quality and repetition rate of the stereotyped strut display as putative cues for female choice. Sage grouse have a lek mating system in which only a small percentage of males mate. 2015; Smith et al. Thus, Young, J. Abstract. Annually, most males fathered only one brood, very few males Recent models of speciation suggest that species characterized by intense sexual selection, such as those with lek mating systems, have the potential for rapid inter-populational Each dawn during mating season, male sage-grouse gather at traditional lek sites and perform elaborate courtship displays called “strutting. Sexual selection in such a mating system can lead to rapid evolution of sexual dimorphism in size, plumage characteristics and mating behavior as well as associated female preferences for such male traits. Sexual selection in such a mating system can lead to rapid evolution of sexual dimorphism in size, plumage Mate choice cues in sage grouse were reinvestigated by analyzing relationships between male mating success and a range of suggested cues. Findings show that The is slow, and the lack of observations of sage pooled harvest sex ratio for adults (includ- grouse in such areas in North Park indicates ing yearlings) in North Park for the years that grouse select We quantified seasonal second‐order habitat selection for sage‐grouse across the state of Utah to produce spatio‐temporal predictions of their distribution at the southern periphery of the species range. More recently, greater insights . nj7 fl 09rb wibffm 0ef hs 23eroyl bwx cvid blxq \