Population Dynamics of Coyotes in Southeastern Colorado

Gese, Eric M.; Rongstad, Orrin J.; Mytton, William R.

doi:10.2307/3801326

Cited by 100 publications

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“…However, our survival rates are similar to those reported for mostly unexploited coyote populations. Gese et al (1989) studied a relatively unexploited population in southeastern Colorado and reported annual survival rates of 0.72-0.80, while Andelt (1985) reported an annual adult survival rate of 0.68 in south Texas.…”

Section: Discussionmentioning

confidence: 96%

“…Rates were calculated for animals of known fate; these rates were compared with rates calculated assuming that all missing animals still lived, and assuming that they had all died (Fuller 1989;Gese et al 1989). The level of territory fidelity was examined by calculating residency rates in the same manner as survival rates but substituting dispersal for death in the calculation (Fuller 1989).…”

Section: Methodsmentioning

confidence: 99%

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Effects of sterilization on territory fidelity and maintenance, pair bonds, and survival rates of free-ranging coyotes

Bromley¹,

Gese²

2001

Can. J. Zool.

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Predation on sheep by coyotes (Canis latrans) is a longstanding problem for sheep producers. Current research suggests that surgical sterilization of coyotes could prove to be an effective method of reducing their depredation rates on domestic sheep by modifying their predatory behavior. However, for sterilization to be a viable management tool, the territorial and affiliative behaviors of pack members would need to remain in place. We tested whether surgically sterilized coyotes maintained pair bonds and territories in the same manner as intact coyotes. We also examined if territory fidelity and survival rates differed between sterile and intact coyotes. From June 1997 to April 2000, 10 males and 9 females were sham-operated and radio-collared, while 20 males and 6 females were surgically sterilized and radio-collared. We monitored members of 5 sterile and 4 intact packs during 1998, 6 sterile and 7 intact packs during 1999, and 4 sterile and 6 intact packs through the 2000 breeding season. Behaviorally, sterile packs appeared to be no different than intact packs. A half-weight association index showed that social dyads within sterile coyote packs were located together as frequently as dyads within intact packs. Simultaneous radiolocations of members of sterile packs showed that members of sterile packs were significantly closer to each other than would be expected from random locations. There was no difference in size or degree of overlap between territories of sterile and shamoperated coyote packs. Sterile coyotes had a higher annual survival rate than reproductive animals in 2 of the 3 years, and there was no difference in the level of territory fidelity. We concluded that surgical sterilization did not modify the territorial or affiliative behaviors of free-ranging coyotes, and therefore sterile coyotes could be used as a management tool to exclude other potential sheep-killing coyotes.Résumé : La prédation opérée sur les moutons par les Coyotes (Canis latrans) est un problème de longue date pour les éleveurs de moutons. Des recherches récentes indiquent que la stérilisation chirurgicale des coyotes pourrait être une façon efficace de diminuer les taux de prédation exercée sur les moutons domestiques car elle modifie le comportement prédateur des coyotes. Cependant, pour que la stérilisation soit un outil de gestion efficace, il faudrait que les comportements territoriaux et les comportements d'affiliation restent les mêmes. Nous avons vérifié si les coyotes stéri-lisés par chirurgie sont capables de maintenir la fidélité à un territoire et les liens entre deux individus aussi bien que les coyotes témoins. Nous avons également vérifié si la fidélité au territoire et les taux de survie diffèrent chez les coyotes stérilisés et les coyotes intacts. De juin 1997 à avril 2000, nous avons procédé à des opérations simulées sur 10 mâles et 9 femelles et stérilisé vraiment 20 mâles et 6 femelles et nous avons muni tous ces animaux d'un collier émetteur. Nous avons suivi ainsi 5 meutes stériles et 4 intactes en 1998, ...

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Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Effects of sterilization on territory fidelity and maintenance, pair bonds, and survival rates of free-ranging coyotes

Bromley¹,

Gese²

2001

Can. J. Zool.

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“…The strong spatial stability exhibited by the coyote packs in this study may have been facilitated by the high density of coyotes in the area (Gese et al 1989;Kitchen et al 1999). An increase in site-use stability when the density of a population is close to habitat saturation has been documented in a number of animal species (e.g., Sterck 1998).…”

Section: Discussionmentioning

confidence: 99%

Long-term spatial stability of coyote (Canis latrans) home ranges in southeastern Colorado

Kitchen¹,

Gese²,

Schauster³

2000

Can. J. Zool.

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Long-term stability of territorial boundaries has not been well documented in canids. To evaluate the prevalence of long-term spatial stability of coyote (Canis latrans) home ranges, we compared the overlap of territorial boundaries and the spatial distribution of telemetry locations of packs in southeastern Colorado. From August 1983 to July 1988 (period l), 16 coyotes from six packs were radio-tracked. From April 1996 to August 1997 (period 2), 12 coyotes from six packs were captured and tracked in the same area. Mean percentage of overlap of pack ranges was 89.8 * 8.3% (+SD) for period 1 ranges over period 2 ranges and 55.8 * 14.4% for period 2 ranges over period 1 ranges. Mean percentage of overlap of the 30% core area of the home ranges was 65.2 * 13.9% for those of period 1 over those of period 2 and 66.3 * 28.7% for those of period 2 over those of period 1. Despite substantial overlap of home-range and core-use areas, there were significant differences in the distribution of locations between periods in five of six home ranges. This suggests that, although packs are faithful to one site (i.e., boundaries remain similar over a period of years), their use of the site (i.e., distribution of locations within the range) may change temporally.RCsumC : La stabilitC B long terme des limites territoriales chez les canidCs est encore ma1 connue. Dans le but d7Cvaluer la stabilitC spatiale B long terme des domaines chez le Coyote (Canis latrans), nous avons comparC le chevauchement des limites territoriales et la rkpartition spatiale des repCrages ttltmCtriques chez des meutes du sud-est du Colorado. D'aoQt 1983 B juillet 1998 (pCriode l), 16 coyotes appartenant B six meutes on Ct C repCrCs par radio. D'avril 1996 B aoQt 1997 (pkriode 2), 12 coyotes appartenant B six meutes ont Ct C capturks et suivis dans la meme zone. Le chevauchement moyen des meutes exprim6 en pourcentage a Ct C de 89,8 * 8,3 % (Ccart type) dans le cas des domaines enregistrks durant la pCriode 1 par rapport B ceux enregistrCs durant la ptriode 2 et de 55,8 * 14,4 % dans le cas des domaines enregistres durant la pCriode 2 par rapport B ceux de la pCriode 1. Le chevauchement moyen de la portion centrale (30 %) des domaines a Ct C de 65,2 rt 13,9 % (pCriode 1 sur pCriode 2) et de 66,3 * 28,7 % (pCriode 2 sur PCriode 1). En dCpit du chevauchement important des domaines et des zones-centrales, il y avait des diffkrences significatives de la rCpartition des sites de repCrage entre les pCriodes dans cinq des six domaines. Ces rCsultats indiquent que malgrC la fidClitC des meutes B un endroit (i.e., similitude des limites durant plusieurs annCes), l'utilisation de l'endroit (i.e., rCpartition des sites de repCrage dans le domaine) peut changer temporairement.[Traduit par la RCdaction]

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“…We used averages when multiple values for a given parameter for a given species were available. Data on annual adult survival were collected from reviews [26][27][28], and we searched for additional survival values from the primary literature specifically to increase the sample of cooperative breeders [29][30][31]. Continuous variables were log-transformed prior to analyses.…”

Section: Methodsmentioning

confidence: 99%

Life histories and the evolution of cooperative breeding in mammals

Lukas

Clutton‐Brock

2012

Proc. R. Soc. B.

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While the evolution of cooperative breeding systems (where non-breeding helpers participate in rearing young produced by dominant females) has been restricted to lineages with socially monogamous mating systems where coefficients of relatedness between group members are usually high, not all monogamous lineages have produced species with cooperative breeding systems, suggesting that other factors constrain the evolution of cooperative breeding. Previous studies have suggested that life-history parameters, including longevity, may constrain the evolution of cooperative breeding. Here, we show that transitions to cooperative breeding across the mammalian phylogeny have been restricted to lineages where females produce multiple offspring per birth. We find no support for effects of longevity or of other life-history parameters. We suggest that the evolution of cooperative breeding has been restricted to monogamous lineages where helpers have the potential to increase the reproductive output of breeders.

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Population Dynamics of Coyotes in Southeastern Colorado

Cited by 100 publications

References 0 publications

Effects of sterilization on territory fidelity and maintenance, pair bonds, and survival rates of free-ranging coyotes

Effects of sterilization on territory fidelity and maintenance, pair bonds, and survival rates of free-ranging coyotes

Long-term spatial stability of coyote (Canis latrans) home ranges in southeastern Colorado

Life histories and the evolution of cooperative breeding in mammals

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