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首页> 外文期刊>Herpetologica >EFFECT OF RADIO TRANSMITTER BURDENING ON LOCOMOTOR ABILITY AND SURVIVAL OF IGUANA HATCHLINGS
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EFFECT OF RADIO TRANSMITTER BURDENING ON LOCOMOTOR ABILITY AND SURVIVAL OF IGUANA HATCHLINGS

机译：无线电发射强度对伊瓜纳幼体运动能力和存活率的影响

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摘要

We performed a two-part experiment in 2007 and 2008 to investigate the effects of externally affixed radio transmitters on the locomotor performance and survival of green ignana (Ignana ignana) hatchlings. Using sprint and climb speeds as locomotor performance variables, we tested in the laboratory the intital speed, maximum burst speed, and overall speed of ignana hatchlings affixed with radio transmitters of 2.5,5.0,7.5,10.0,and 15.0% transmitter-to-body-mass (Bm) ratios. We then released ignana hatchlings into a Costa Rican lowland forest to record the survuval of free-ranging ignanas affixed with transmitters of 5.0,7.5 and 10.0% transmitter to BM ratios. Sprint speeds were not reduced significantly with transmitters of up tp 15.0% body mass. climb speeds, however, were reduced for two of three performance variables at the 10% into the forest. The probability of survival over two field seasons for telemetered ignanas ranged from 52.2-65.2% over a 24-30 day assessment period. For telemetered ignanas, percentage BM growth was significantly less for animals affixed with 10.0% BM transmitters than for control ignanas without transmitters. We suggest transmitter-to-body-mass ratios for cryptic arboreal lizard species should not exceed 7.5% based on lower climb performance in the laboratory and lower relative mass gain for free-ranging ignanas with >= 10.0% BM transmitters. Because lizard life histories vary substantially, researchers should be proactive in evaluating the energetic expenditures, foraging strategies, and escape responses of focal species to minimize effects of transmitter and attachment techniques.
机译：我们在2007年和2008年进行了一个由两部分组成的实验，以研究外部固定无线电发射器对绿色ignana（Ignana ignana）幼体的运动性能和存活率的影响。使用冲刺和爬升速度作为运动性能变量，我们在实验室中测试了固定有2.5％，5.0％，7.5％，10.0％和15.0％的发射机对人体的伊格纳娜幼体的初始速度，最大爆发速度和整体速度-质量（Bm）比率。然后，我们在哥斯达黎加的低地森林中放出了成年的雏鱼，记录了固定的成年的成年鱼的生存情况，这些成年树中的发射机与BM比率分别为5.0、7.5和10.0％。 TP达到15.0％体重的发射机，冲刺速度并未显着降低。但是，在进入森林的10％时，三个性能变量中的两个的爬升速度降低了。在24至30天的评估期内，遥测伊格纳斯在两个野外季节生存的概率为52.2-65.2％。对于遥测的伊格纳斯，贴有10.0％BM发射器的动物的BM增长百分比显着低于没有发射器的对照伊格纳斯。我们建议隐秘的树栖蜥蜴物种的发射器与身体的质量比应不超过7.5％，这是因为实验室中较低的爬升性能和自由发射的ignana的相对质量增益较低，而BM发射器大于等于10.0％。由于蜥蜴的生活史千差万别，因此研究人员应积极评估精力消耗，觅食策略和对焦点物种的逃避反应，以最大程度地减少发射器和附着技术的影响。

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