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首页> 外文期刊>Journal of Wildlife Management >Effects of hunting and hunting-hour extension on mourning dove foragingand physiology
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Effects of hunting and hunting-hour extension on mourning dove foragingand physiology

机译：狩猎和狩猎时间延长对哀鸽觅食和生理的影响

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During 1993, the Illinois Department of Natural Resources extended mourning dove (Zenaida macroura) hunting hours to increase recreational opportunities. We investigated the physiological response of doves to extended hunting hours through a combination of laborator- ' y and field procedures. We determined that food deprivation causes corticosterone levels to increase in doves, Suggesting that if doves were excluded from foraging areas by hunting pressure, a rise in corticosterone levels should be detectable. Field procedures revealed that hunting resulted in a measurable increase in corticosterone levels, although the magnitude of the observed increase probably was not biologically significant (preseason (x) over bar = 1.35 ng/ml vs. hunting (x) over bar = 1.87 ng/ml). We did not detect differences in corticosterone levels between traditional and extended hunting hour,,; (P = 0.25), but did find evidence to suggest that dove foraging was affected by hunting and hunting hours. Mourning dove weights were greater preseason ((x) over bar = 117.4 g) than during hunting season ((x) over bar = 111.0 g), which may be partially explained by an increase in the number of empty crops during hunting season (54.1% hunting season vs. 25.8% preseason). The absence of food in crops most likely accounted for the observed weight loss. Furthermore, sunflower seeds (the dove attractant) were more frequently found in crops preseason (45.1%) than after the start of hunting (22.1%), suggesting that doves hunted during traditional hunting hours foraged on sunflower seeds more than doves harvested during extended hunting hours. However. the effects of hunting on foraging did not cause rises of corticosterone levels comparable to those observed in food deprivation experiments. We conclude that most doves were not stressed by the hunting-hour change.
机译：1993年，伊利诺伊州自然资源部延长了哀悼鸽子（Zenaida macroura）的狩猎时间，以增加娱乐机会。我们通过实验室和野外手术相结合的方法调查了鸽子对延长狩猎时间的生理反应。我们确定食物不足会导致鸽子的皮质类固醇水平升高，这表明如果通过狩猎压力将鸽子排除在觅食区之外，皮质类固醇水平会上升。野外调查表明，狩猎导致皮质类固醇水平显着增加，尽管观察到的升高幅度在生物学上可能不显着（季前（x）超过bar = 1.35 ng / ml，而狩猎（x）超过bar = 1.87 ng / ml毫升）。我们没有发现传统狩猎时间和延长狩猎时间之间的皮质酮水平存在差异; （P = 0.25），但确实找到证据表明鸽子觅食受到狩猎和狩猎时间的影响。哀鸽的季前体重（x超过bar = 117.4 g）大于狩猎季节（x超过bar = 111.0 g），这在一定程度上可以归因于狩猎季节的空粮数量增加（54.1） ％的狩猎季与季前的25.8％）。作物中缺少食物很可能是观察到的体重减轻的原因。此外，季前农作物中发现的葵花籽（鸽子引诱剂）比开始狩猎后更常见（占42.1％），这表明在传统狩猎时间内捕猎的鸽子在葵花籽上觅食比在长期狩猎中捕捞的鸽子要多。小时。然而。狩猎对觅食的影响并没有导致皮质类固醇水平的上升，与食物匮乏实验中观察到的水平相当。我们得出的结论是，大多数鸽子没有受到狩猎时间变化的压力。

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