Effects of Sevin on Small-Mammal Populations in Agricultural and Old-Field Ecosystems

Barrett, Gary W.

doi:10.2307/1381628

Cited by 25 publications

(24 citation statements)

References 8 publications

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“…Carbaryl inhibited reproduction in cotton rats Sigmodon hispidus (Barrett, 1968(Barrett, , 1988Pomeroy and Barrett, 1975). Mirex has been found to cause a decrease in both litter size and litter production in old-field mice Peromyscus polionotus (Wolfe et al, 1979).…”

Section: Phase 2 -Pregnancymentioning

confidence: 99%

A New Interpretation of Avian and Mammalian Reproduction Toxicity Test Data in Ecological Risk Assessment

Bennett

Dewhurst²,

Fairbrother

et al. 2005

Ecotoxicology

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The long-term risks of pesticides to wildlife in the EU currently are assessed by comparing the lowest no-observed-effect concentration (NOEC) determined from the suite of endpoints measured in existing avian and mammalian laboratory reproduction tests with estimated exposure concentrations by calculating Toxicity to Exposure Ratios (TERs). Regulatory authorities experience difficulties when assessing long-term risks because of the lack of accepted methods to improve the ecological realism of exposure and toxicity estimates and understand risks at a population level. This paper describes an approach for interpreting existing avian and mammalian toxicity test data that divides breeding cycles into several discrete phases and identifies specific test endpoints as indicators of direct pesticide effects possible at each phase. Based on the distribution of breeding initiation dates for a species of concern and the dates of pesticide applications, this approach compares the phase-specific toxicity endpoint with the expected pesticide exposure levels during each of the breeding phases. The fate of each breeding attempt is determined through a series of decision points. The cumulative reproductive response of individuals in a breeding population based on this decision framework provides a means of examining the estimated risks over the course of the breeding season and deriving an overall metric of the impact of the pesticide on reproduction. Research needed to further improve the approach is discussed.

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Section: Phase 2 -Pregnancymentioning

confidence: 99%

A New Interpretation of Avian and Mammalian Reproduction Toxicity Test Data in Ecological Risk Assessment

Bennett

Dewhurst²,

Fairbrother

et al. 2005

Ecotoxicology

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“…Increasingly laboratory breeding is employed in field and laboratory research related to conservation efforts (Seal et al, 1989;Amstislavsky et al, 2008). Our findings suggest season-of-release should be considered when releasing laboratory-bred small mammals into their natural habitat or when releasing small mammals into outdoor enclosures for experimental research (Barrett, 1985;Schwartz and Mills, 2005) because of cyclic changes in biotic (life histories of predators) and abiotic (climate) factors.…”

Section: Discussionmentioning

confidence: 79%

Survivorship and Reproductive Success of Released Laboratory-bred and Native Golden Mice within a Forest-edge Habitat

Barrett¹,

Barrett²,

Pratt³

2015

The American Midland Naturalist

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We investigated season-of-release effects on survivorship and reproductive success of laboratory-bred compared with a native population of golden mice [Ochrotomys nuttalli (Harlan)] within a deciduous forest habitat. We released two sets of 32 adult pairs of laboratorybred golden mice into eight experimental transects established in forest-edge habitat. Releases were conducted in early spring (7 Mar. 2009) and late autumn (2 Nov. 2009). Population abundance of laboratory-bred and native golden mice was severely reduced in late spring and summer following the spring release due to black rat snake [Elaphe obsoleta (Stejneger and Barbour)] predation. Laboratory-bred golden mice, however, maintained a stable population density of 15-18 individuals following the late autumn release as snake predation diminished during winter months. The native population of golden mice maintained an abundance of 25-28 individuals through mid-Mar. The laboratory-bred and native populations exhibited similar reproductive success following autumn release, even crossbreeding during winter.The season-of-release was the most important factor regarding survivorship and reproductive success of released laboratory-bred golden mice and the native population in identical forest-edge habitat.

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“…Similar impacts have been observed with AChE inhibitors. For example, carbaryl sprayed on oats (2.3 kg/ha) had different impacts on populations of small herbivorous mammals: while house mice (Mus musculus) increased in the treated fields, the population of meadow voles decreased due to a 5-6 week delay in pregnancies among their females (Barrett 1988 …”

Section: Terrestrial Populationsmentioning

confidence: 99%

Ecological Impacts of Insecticides

Sánchez‐Bayo¹

2012

Insecticides - Advances in Integrated Pest Management

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Effects of Sevin on Small-Mammal Populations in Agricultural and Old-Field Ecosystems

Cited by 25 publications

References 8 publications

A New Interpretation of Avian and Mammalian Reproduction Toxicity Test Data in Ecological Risk Assessment

A New Interpretation of Avian and Mammalian Reproduction Toxicity Test Data in Ecological Risk Assessment

Survivorship and Reproductive Success of Released Laboratory-bred and Native Golden Mice within a Forest-edge Habitat

Ecological Impacts of Insecticides

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