Arid
DOI10.1071/WR17069
Too much hot air? Informing ethical trapping in hot, dry environments
Read, John. L.1; Pedler, Reece. D.2,3; Kearney, Michael R.4
通讯作者Read, John. L.
来源期刊WILDLIFE RESEARCH
ISSN1035-3712
EISSN1448-5494
出版年2018
卷号45期号:1页码:16-30
英文摘要

Context. Trapping of small vertebrates during their active hot summer periods is vital for conservation and impact assessment studies. Animal Ethics Committees (AECs) protect wildlife by enforcing arbitrary but restrictive temperature limits for trapping.


Aims. Empirical data were gathered on the temperatures reached in different trap configurations to inform pragmatic ethical guidelines.


Methods. Temperature was measured inside small vertebrate traps at two Australian arid zone sites to generate data on the thermal consequences of: (1) trap design and external shading; (2) provision of protective refuge substrates; and (3) timing of trap clearing.


Key results. Shading and increased trap depth significantly reduced temperatures within pitfall traps. A conservative stressful upper temperature limit of 36 degrees C was never exceeded inside deep, shaded, narrow pitfall traps at one study site and only between 1100 and 1300 hours on 3 days at the hotter site, despite ambient temperatures reaching over 42 degrees C. By contrast, potentially lethal upper temperatures were reached in wider, shallower bucket pit traps on most days at both sites, even when optimal shading and refuge substrates were employed. Deployment of surface traps under vegetation and with additional shading significantly reduced maximum temperatures experienced. Temperatures inside shaded Elliott and funnel traps generally tracked ambient air temperatures and thus typically exceeded conservative threshold temperatures between 0700 and 1900 hours when ambient temperatures exceeded 36 degrees C.


Conclusions. Temperatures experienced in optimal deep, shaded traps when ambient temperatures exceeded 40 degrees C were 31 degrees C lower than surface temperatures and similar to temperatures recorded at 20 cm below the soil surface, where many species would typically take refuge at these times.


Implications. Data suggest that deep (60 cm), narrow pitfall traps with elevated lids for shade and shelter substrate inside should enable trapping to be conducted safely in the study region during summer (December to February). This is even the case in extremely hot weather, as long as trapped animals are removed within 4 h of sunrise. Ecophysiological studies of thermal tolerance within optimum trap arrangements revealed by the present study will allow field ecologists and AECs to develop informed site-specific trapping protocols.


英文关键词animal welfare capture mortality climate critical thermal maxima Elliott trap funnel trap heat wave pitfall trap reptile shading
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000429152100002
WOS关键词SMALL GROUND VERTEBRATES ; PITFALL CAPTURE RATES ; ARID SOUTH-AUSTRALIA ; SMALL MAMMALS ; THERMOREGULATORY BEHAVIOR ; TEMPERATURE ; MORTALITY ; REPTILES ; TRAPS ; HEAT
WOS类目Ecology ; Zoology
WOS研究方向Environmental Sciences & Ecology ; Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/213743
作者单位1.Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5000, Australia;
2.SA Arid Lands Reg, Dept Environm Water & Nat Resources, POB 78, Port Augusta, SA 5700, Australia;
3.Univ New South Wales, Ctr Ecosyst Sci, Sch Biol Earth & Environm Sci, Sydney, NSW 2035, Australia;
4.Univ Melbourne, Sch Biosci, Melbourne, Vic 3010, Australia
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GB/T 7714
Read, John. L.,Pedler, Reece. D.,Kearney, Michael R.. Too much hot air? Informing ethical trapping in hot, dry environments[J],2018,45(1):16-30.
APA Read, John. L.,Pedler, Reece. D.,&Kearney, Michael R..(2018).Too much hot air? Informing ethical trapping in hot, dry environments.WILDLIFE RESEARCH,45(1),16-30.
MLA Read, John. L.,et al."Too much hot air? Informing ethical trapping in hot, dry environments".WILDLIFE RESEARCH 45.1(2018):16-30.
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