Home Ranges, Movements, and Habitat Selection of Oregon Spotted Frogs (Rana pretiosa)

Watson, James; McAllister, Kelly; Pierce, D. John

doi:10.1670/0022-1511(2003)037[0292:hrmahs]2.0.co;2

Cited by 50 publications

(35 citation statements)

References 14 publications

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“…However, for a more aquatic species like the OSF [6], pond-drying may concentrate individuals into remaining wet habitats, potentially making them more vulnerable to inter-and intraspecies predation [22]. Although we did not observe any treatment-related effects on growth or behavior of OSF juveniles exposed to imazapyr that might indicate a higher vulnerability to predation, we did not test for responses in natural conditions of pond-drying, concentration of individuals and/or increased competition, or presence of predators (e.g., Boone and James [23]).…”

Section: Discussionmentioning

confidence: 99%

“…The model including both the number of males and the sample day as random factors was further improved over the model without random factors (var males ¼ 87. 6 found. Significant linear relationships existed between treatment and sample day for control and low treatments but not for high, and no significant linear effects of the interactions between individual treatments and sample day were found (Table 4).…”

Section: Behaviormentioning

confidence: 94%

“…Habitat loss and degradation are considered among the most likely causes of the decline and extirpation of the species from 70 to 90% of its former range [5]. Loss and alteration of shallow breeding wetlands are of particular concern [5], including degradation caused by invasive reed canarygrass (Phalaris arundinacea) [6].…”

Section: Introductionmentioning

confidence: 99%

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Effects of the herbicide imazapyr on juvenile Oregon spotted frogs

Yahnke¹,

Grue²,

Hayes³

et al. 2012

Enviro Toxic and Chemistry

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Abstract-Conflict between native amphibians and aquatic weed management in the Pacific Northwest is rarely recognized because most native stillwater-breeding amphibian species move upland during summer, when herbicide application to control weeds in aquatic habitats typically occurs. However, aquatic weed management may pose a risk for aquatic species present in wetlands through the summer, such as the Oregon spotted frog (OSF, Rana pretiosa), a state endangered species in Washington. Acute toxicity of herbicides used to control aquatic weeds tends to be low, but the direct effects of herbicide tank mixes on OSFs have remained unexamined. We exposed juvenile OSFs to tank mixes of the herbicide imazapyr, a surfactant, and a marker dye in a 96-h static-renewal test. The tank mix was chosen because of its low toxicity to fish and its effectiveness in aquatic weed control. Concentrations were those associated with low-volume (3.5 L/ha) and high-volume (7.0 L/ha) applications of imazapyr and a clean-water control. Following exposure, frogs were reared for two months in clean water to identify potential latent effects on growth. Endpoints evaluated included feeding behavior, growth, and body and liver condition indices. We recorded no mortalities and found no significant differences for any end point between the herbicide-exposed and clean-water control frogs. The results suggest that imazapyr use in wetland restoration poses a low risk of direct toxic effects on juvenile OSFs. Environ. Toxicol. Chem. 2013;32:228-235. # 2012 SETAC

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Section: Discussionmentioning

confidence: 99%

Section: Behaviormentioning

confidence: 94%

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Effects of the herbicide imazapyr on juvenile Oregon spotted frogs

Yahnke¹,

Grue²,

Hayes³

et al. 2012

Enviro Toxic and Chemistry

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“…The habitat variables thought to most commonly determine whether a water body will be used by a given species resident within the area include hydroperiod (Lehtinen et al 1999, Beja & Alcazar 2003, Watson et al 2003) and vegetation structure , Homan et al 2004, Porej & Hetherington 2005, Van Buskirk 2005. These important vegetation elements may be found directly in or around the water body or be more distant to it and represent both breeding and nonbreeding requirements (Hartel et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Habitat relationships and presence of the threatened heath frog Litoria littlejohni (Anura: Hylidae) in central New South Wales, Australia

Lemckert¹

2010

Endang. Species. Res.

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The heath frog Litoria littlejohni has been recorded from only scattered locations in south-eastern Australia, and habitat specificity may determine this rarity. I tested for relationships between the presence/absence of this species and habitat at 2 scales. A logistic regression was used to compare 10 presence and 36 absence sites to habitat variables at ponds located in central New South Wales. Habitat information derived from Geographic Information System (GIS) datalayers was compared to 51 known presence and 13 000 absence (null) sites located within 220 km of Sydney. A predictive regression tree was also created using the 51 presence and 1000 of the absence sites. In the Watagan Mountains, heath frog presence showed a significant negative relationship with the percentage of grass cover in the surrounding forest. Heath frog presence sites in the Sydney region were positively associated with moist environments (Prescott Index) and negatively associated with terrain roughness. The regression tree indicated a 94% probability of presence where the Prescott Index was >1.2 and the solar radiation index was >13.4. These results indicate that heath frogs are present in moist, sunny areas that are relatively flat. However, these variables are too broad to accurately predict heath frog presence at a specific water body. Based on this information, the heath frog is absent from many apparently suitable sites. Thus, its patchy distribution, if habitat related, results from a yet to be measured variable. KEY WORDS: Habitat relationships · Litoria littlejohni · GIS · PresenceResale or republication not permitted without written consent of the publisher OPEN PEN

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“…Anuran utilisation distributions are commonly associated with availability of suitable resources (Donnelly 1989) and microhabitat conditions (Watson et al 2003;Ra et al 2008;Qi et al 2011). Home ranges of Syrrhophus marnocki were studied in south central Texas, and variations in home range size across several study areas were thought to relate to differences in the amount of cover available (Jameson 1955).…”

Section: Introductionmentioning

confidence: 99%

Riparian vegetation condition influences movement and microhabitat use by Mixophyes fasciolatus in South East Queensland

Schwenke¹

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Home Ranges, Movements, and Habitat Selection of Oregon Spotted Frogs (Rana pretiosa)

Cited by 50 publications

References 14 publications

Effects of the herbicide imazapyr on juvenile Oregon spotted frogs

Effects of the herbicide imazapyr on juvenile Oregon spotted frogs

Habitat relationships and presence of the threatened heath frog Litoria littlejohni (Anura: Hylidae) in central New South Wales, Australia

Riparian vegetation condition influences movement and microhabitat use by Mixophyes fasciolatus in South East Queensland

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