| View Larger Image | DDT and metabolites residues in the southern bent-wing bat (Miniopterus schreibersii bassanii) of south-eastern Australia [An article from: Chemosphere] | Digitalby C. Mispagel (Author), M. Allinson (Author), G. Allinson (Author), N. Iseki (Author), G (Author)
| List Price: | $8.95 | | | Available: | Available for download now |
| | Binding: | Digital | | Publisher: | Elsevier | | Publication Date: | May 01, 2004 |
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Product Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.Description: The southern bent-wing bat (Miniopterus schreibersii bassanii) is an insectivorous, obligate cave dwelling species found in south-eastern South Australia and western Victoria, Australia. In recent times, the finger of blame for an apparent population decline at Bat Cave, Naracoorte (one of only two known maternity roosts for this species, the other being Starlight Cave, Warrnambool) has been pointed at pesticide use in the region, following the finding of organochlorine and organophosphate insecticide residues in bat guano. This study sampled juvenile southern bent-wing bats from Bat Cave and Starlight Cave, and determined DDT, DDD and DDE concentrations in liver, pectoral muscle, brain and back-depot fat tissues. DDT was detected in only three tissue samples (highest concentration, 126 @mgkg^-^1 (wet weight) in back-depot fat), DDD was detected only in brain tissue (highest concentration, 115 @mgkg^-^1 (wet weight)), but DDE was detected in most tissues (highest concentration, 24200 @mgkg^-^1 (wet weight) in back-depot fat). A minimum DDE body burden was estimated for each bat, and then for each sex at each site, from the data from all tissues sampled. The DDE body burdens estimated were highest in male bats from Starlight Cave (114 @mgkg^-^1), then females from Starlight Cave (54.5 @mgkg^-^1), and males from Bat Cave (53.2 @mgkg^-^1). Female bats at Bat Cave contained the lowest estimated body burden (24.2 @mgkg^-^1). Comparisons of DDE concentrations between the sexes showed that contamination was not statistically different within each maternity site. The different chemical concentrations observed in the Bat Cave and Starlight Cave bats is suggestive of different feeding locations, and perhaps an emerging population split, further threatening a species already at risk as a result of landscape scale changes to land use across their range. |
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