Predicting the evolutionary effects of hunting requires an understanding of genetics

Kardos, Marty; Luikart, Gordon; Allendorf, Fred W.

doi:10.1002/jwmg.21475

Cited by 11 publications

(27 citation statements)

References 20 publications

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“…Heffelfinger () provided a poor example of linked loci confounding an evolutionary response to selection, but Kardos et al () acknowledged this concept is correct and well supported by theoretical and empirical genetics research. The point remains valid even if the empirical example provided was not.…”

Section: Linked Loci Can Influence Evolutionary Responsementioning

confidence: 99%

“…We have agreement that linked loci present yet another obstacle interfering with harvest‐based selection on horn or antler size. Pleiotropy, polygenic inheritance, and heterozygote advantage could be added to the list of mechanisms that potentially interfere with harvest‐based selection causing evolutionary change in horns and antlers, as noted by Kardos et al ().…”

Section: Linked Loci Can Influence Evolutionary Responsementioning

confidence: 99%

“…Kardos et al () clarified that all offspring have fathers regardless of sex ratio and correctly adjusted the percent of the total population's genetic material under selection upward from 25–33% to 50%. Nevertheless, the point made by Heffelfinger () stands as valid, even when percentages are adjusted.…”

Section: Only Half Of the Population Is Subject To Hunter Selection Fmentioning

confidence: 99%

“…This dialogue is important but does not alter the primary premise of Heffelfinger (), which was to call attention to the multitude of previously neglected genetic and nongenetic factors that make hunter selection inefficient and uncommon in wild ungulates, and to warn against generalizing the results from specific studies. Kardos et al () misrepresent my paper by repeatedly creating a false argument that the factors I discuss do not preclude rapid evolution in response to selective hunting. These factors were offered as obstacles, not absolute obstructions, to harvest‐based selection causing evolutionary change in the size of horns or antlers.…”

mentioning

confidence: 97%

“…Kardos et al () helped clarify details of the mechanisms behind selective harvest and evolutionary effect. This dialogue is important but does not alter the primary premise of Heffelfinger (), which was to call attention to the multitude of previously neglected genetic and nongenetic factors that make hunter selection inefficient and uncommon in wild ungulates, and to warn against generalizing the results from specific studies.…”

mentioning

confidence: 99%

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Obstacles to evolutionary consequences of ungulate trophy hunting: Reply to Kardos et al

Heffelfinger

2018

J Wildl Manag

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Section: Linked Loci Can Influence Evolutionary Responsementioning

confidence: 99%

Section: Linked Loci Can Influence Evolutionary Responsementioning

confidence: 99%

Section: Only Half Of the Population Is Subject To Hunter Selection Fmentioning

confidence: 99%

mentioning

confidence: 97%

mentioning

confidence: 99%

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Obstacles to evolutionary consequences of ungulate trophy hunting: Reply to Kardos et al

Heffelfinger

2018

J Wildl Manag

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Mountain sheep management must use representative data: A reply to Festa‐Bianchet (2019)

Boyce¹,

Coulson²,

Heffelfinger

et al. 2018

J Wildl Manag

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Habitat and Harvesting Practices Influence Horn Growth of Male Ibex

et al. 2020

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Size-selective harvesting of wild ungulates can trigger a range of ecological and evolutionary consequences. It remains unclear how environmental conditions, including changes in habitat, climate, and local weather conditions, dilute or strengthen the effects of trophy hunting. We analyzed horn length measurements of 2,815 male ibex (Capra pyrenaica) that were harvested from 1995 to 2017 in Els Ports de Tortosa i Beseit National Hunting Reserve in northeastern Spain. We used linear mixed models to determine the magnitude of inter-individual horn growth variability and partial least square path models to evaluate long-term effects of environmental change, population size, and hunting strategy on horn growth. Age-specific horn length significantly decreased over the study period, and nearly a quarter (23%) of its annual variation was attributed to individual heterogeneity among males. The encroachment of pine (Pinus spp.) forests had a negative effect on annual horn growth, possibly through nutritional impoverishment. The harvesting of trophy and selective individuals (e.g., small-horned males) from the entire population increased horn growth, probably because it reduced the competition for resources and prevented breeding of these smaller males. Local weather conditions and population size did not influence horn growth. Our study demonstrates how habitat changes are altering the horn growth of male ibex. We suggest that habitat interventions, such the thinning of pine forests, can contribute to securing the sustainability of trophy hunting. Even in situations where size-selective harvesting is not causing a detectable phenotypic response, management actions leading to the expansion of preferred land cover types, such as grass-rich open areas, can have a positive effect on ungulate fitness. Forest encroachment on open meadows and heterogeneous grasslands is pervasive throughout Mediterranean ecosystems. Therefore, our management recommendations can be extended to the landscape level, which will have the potential to mitigate the side effects of habitat deterioration on the phenotypic traits of wild ibex.

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Predicting the evolutionary effects of hunting requires an understanding of genetics

Cited by 11 publications

References 20 publications

Obstacles to evolutionary consequences of ungulate trophy hunting: Reply to Kardos et al

Obstacles to evolutionary consequences of ungulate trophy hunting: Reply to Kardos et al

Mountain sheep management must use representative data: A reply to Festa‐Bianchet (2019)

Habitat and Harvesting Practices Influence Horn Growth of Male Ibex

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