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RESEARCH ARTICLE
Contents Vol 35(8)

A comparison of the effectiveness of bat detectors and harp traps for surveying bats in an urban landscape

C. L. Hourigan A C , Carla P. Catterall A , Darryl Jones A and Martin Rhodes B
+ Author Affiliations
- Author Affiliations

A Centre for Innovative Conservation Strategies, Griffith University, Nathan, Qld 4111, Australia.

B University of Queensland, St Lucia, Qld 4067, Australia.

C Corresponding author. Email: clhourigan@yahoo.com.au

Wildlife Research 35(8) 768-774 https://doi.org/10.1071/WR07154
Submitted: 28 September 2007  Accepted: 12 August 2008   Published: 16 December 2008

Abstract

Obtaining adequate information for informed conservation-management decisions requires effective and cost-efficient survey techniques. We compared the effectiveness of bat detectors and harp traps for surveying bat assemblages within an urban landscape in Brisbane, Australia, with respect to number and composition of species. Nine sites within each of three habitat types (remnant bushland, parkland, and low-density residential – a total of 27 sites) were sampled twice each. The bat detectors recorded 3628 calls, from which 13 taxa were identified. The harp traps captured 17 individuals, from which five taxa were identified. All species captured by harp trap were also detected by bat detector, with the possible exception of N. bifax. Bat detectors recorded significantly more species per site than were captured by harp traps, both overall and within each of the three habitat types. And although a considerable amount of time and expense was required to identify the recorded echolocation calls to species, bat detectors were also the most cost-efficient sampling method. These results collectively show that bat detectors were the most effective and cost-efficient method for surveying the bat assemblage in this urban landscape.


Acknowledgements

We greatly appreciate the comments and assistance provided by G. Hoye and C. Corben regarding the identification of bat calls to species. Helpful comments were made on an early draft of this manuscript by members of the Wildlife Ecology Discussion Group, Monika Rhodes and three anonymous referees. Thanks also to all the home owners and golf course managers for allowing access to their properties and golf courses, and Ian Witheyman, Jane Ogilvie, Jason Edgar, Cathy Dexter, Brett Taylor, Michelle Bolger, and Josh King for assistance in the field setting up and checking so many empty harp traps. Grants from the Royal Zoological Society of NSW and Griffith University funded this research. Ethics approval (AES/09/04/aec) and permits from the Environmental Protection Agency (WITK02300304, WISP02299604, and TWB/02/2004) were obtained before conducting the study.


References

Adams, M. , Reardon, T. R. , Baverstock, P. R. , and Watts, C. H. S. (1988). Electrophoretic resolution of species boundaries in Australian Microchiroptera. IV. The Molossidae (Chiroptera). Australian Journal of Biological Sciences 41, 417–433.
Catterall C. P. , and Kingston M. (1993). Remnant bushland of south east Queensland in the 1990’s: its distribution, loss, ecological consequences, and future prospects. Institute of Applied Environmental Research, Griffith University and Brisbane City Council, Brisbane.

Churchill S. (1998). ‘Australian Bats.’ (New Holland Publishers: Sydney.)

Colwell R. K. (2005). EstimateS: Statistical estimation of species richness and shared species from samples. Version 7.5. Department of Ecology & Evolutionary Biology, University of Connecticut [Accessed 1 December 2006] Available from: http://purl.oclc.org/estimates

Corben C. , and O’Farrell M. J. (1999). Anabat system manual. 2nd edn. O’Farrell Biological Consulting, Las Vegas. Available at http://mammalogist.org/anabat/anabat.htm.

de Oliveira M. C. (1998 a). Anabat System Practical Guide: survey techniques, collection and characterisation of reference bat echolocation calls, common field problems and problem solving. Department of Natural Resources, Brisbane.

de Oliveira, M. C. (1998b). Towards standardised descriptions of the echolocation calls of microchiropteran bats: pulse design terminology for seventeen species from Queensland. Australian Zoologist 30, 405–412.
DIP (2008). South East Queensland. Department of Infrastructure and Planning, Queensland Government [Accessed 28 May 2008] Available from: http://www.dip.qld.gov.au/seq

Duffy, A. M. , Lumsden, L. F. , Caddle, C. R. , Chick, R. R. , and Newell, G. R. (2000). The efficacy of Anabat ultrasonic detectors and harp traps for surveying microchiropterans in south-eastern Australia. Acta Chiropterologica 2, 127–144.
Duncan A. , Baker G. B. , and Montgomery N. (1999). ‘The Action Plan for Australian Bats.’ (Environment Australia: Canberra.)

Fenton, M. B. (1982). Echolocation calls and patterns of hunting and habitat use of bats (Microchiroptera) from Chillagoe, North Queensland. Australian Journal of Zoology 30, 417–425.
| Crossref | GoogleScholarGoogle Scholar | Forman R. T. T. , and Godron M. (1986). ‘Landscape Ecology.’ (John Wiley and Sons: New York.)

Fowler J. , Cohen L. , and Jarvis P. (1998). ‘Practical Statistics for Field Biology.’ 2nd edn. (John Wiley and Sons: Brisbane.)

Francis, C. M. (1989). A comparison of mist nets and two designs of harp traps for capturing bats. Journal of Mammalogy 70, 865–870.
| Crossref | GoogleScholarGoogle Scholar | Parnaby H. (1992). An interim guide to identification of insectivorous bats of south-eastern Australia. Technical Reports of the Australian Museum, No. 8. Australian Museum, Sydney.

Parsons, S. , Boonman, A. M. , and Obrist, M. K. (2000). Advantages and disadvantages of techniques for transforming and analysing Chiropteran echolocation calls. Journal of Mammalogy 81, 927–938.
| Crossref | GoogleScholarGoogle Scholar | Reinhold L. , Law B. , Ford G. , and Pennay M. (2001). Key to the bat calls of south-east Queensland and north-east New South Wales. Queensland Department of Natural Resources and Mines, Brisbane.

Rhodes M. (2006). The ecology and conservation of the white-striped freetail bat (Tadarida australis) in urban environments. Ph.D. Thesis. Griffith University, Brisbane.

Savard, J.-P. L. , Clergeau, P. , and Mennechez, G. (2000). Biodiversity concepts and urban ecosystems. Landscape and Urban Planning 48, 131–142.
| Crossref | GoogleScholarGoogle Scholar |

Schulz, M. , and de Oliveira, M. C. (1995). Microchiropteran fauna of Kroombit Tops, central Queensland, including a discussion on survey techniques. Australian Zoologist 30, 71–77.


Stebbings, R. E. (1995). Why should bats be conserved? A challenge for conservation. Biological Journal of the Linnean Society 56(suppl), 103–118.
| Crossref | GoogleScholarGoogle Scholar |

Tidemann, C. R. , and Woodside, D. P. (1978). A collapsible bat-trap and a comparison of results obtained with the trap and with mist-nets. Australian Wildlife Research 5, 355–362.
| Crossref | GoogleScholarGoogle Scholar |