2006
DOI: 10.2193/0091-7648(2006)34[1225:uohcaa]2.0.co;2
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Uses of Herd Composition and Age Ratios in Ungulate Management

Abstract: Wildlife managers commonly collect sex and age ratios to manage ungulate populations. This information typically is used to assess trends in population goals (e.g., bull elk [Cervus elaphus] escapement). Many managers may be unaware or underestimate the amount of information that can be derived from these commonly collected ratios. Herein, I review types of information applicable to population management that can be derived from composition ratios. This information includes mortality or survival rates, maximum… Show more

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Cited by 36 publications
(42 citation statements)
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“…Estimates of demographic parameters and statistics that depend on classification data are frequently used in conservation, monitoring, and adaptive management (Bassar et al, 2010;Lahoz-Monfort, Guillera-Arroita, & Hauser, 2014). Sex ratios are used in hunting and fishing regulations because optimal harvest yields depend on age and sex composition (Bender, 2006;Hauser, Cooch, & Lebreton, 2006;Jensen, 1996;Murphy & Smith, 1990). Disease management strategies based on prevalence and transmission rates depend on disease status obtained from imperfect diagnostic testing (PCR, ELISA, visual inspection, etc.)…”
mentioning
confidence: 99%
“…Estimates of demographic parameters and statistics that depend on classification data are frequently used in conservation, monitoring, and adaptive management (Bassar et al, 2010;Lahoz-Monfort, Guillera-Arroita, & Hauser, 2014). Sex ratios are used in hunting and fishing regulations because optimal harvest yields depend on age and sex composition (Bender, 2006;Hauser, Cooch, & Lebreton, 2006;Jensen, 1996;Murphy & Smith, 1990). Disease management strategies based on prevalence and transmission rates depend on disease status obtained from imperfect diagnostic testing (PCR, ELISA, visual inspection, etc.)…”
mentioning
confidence: 99%
“…Other demographic parameters, such as sex ratio and age proportions are of equal importance in supporting the management of ungulate species (Bender, 2006;Pohler et al, 2014). However, aerial surveys of the marsh deer do not provide these data (Mourão & Campos, 1995;Mourão et al, 2000;Tomas et al, 2001;Tiepolo et al, 2010), and it has been reported that sexual identification is not possible in 74% of sightings .…”
Section: Camera Trapmentioning
confidence: 99%
“…Similarly to sex ratios information, determining age proportions or detecting the frequency of fawns in a population are essential to understanding population recruitment and to infer about population dynamics (Bender, 2006;Pohler et al, 2014). In this regard, once again the camera traps were more informative.…”
Section: Camera Trapmentioning
confidence: 99%
“…Only a few demographic studies have been conducted for the mountain nyala; the first over 45 years ago [2], and two recently in a small isolated population in BMNP [10,11]. To successfully manage and conserve any wildlife species, a basic understanding of the population's structure and group dynamics are required [12][13][14][15]. Demographic parameters (i.e., vital rates) are often used as indices of population's health and stability, and to evaluate a species' status and viability [16,17].…”
Section: Introductionmentioning
confidence: 99%