A Morphological and Ecological Comparison of Two Populations of the Tailed Frog, Ascaphus truei Stejneger

Metter, D

doi:10.2307/1440849

Cited by 60 publications

(46 citation statements)

References 7 publications

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“…suggest greater fecundity than other SAA, and a possible explanation for why giant salamanders are more abundant and appear to be more resilient to environmental change than torrent salamanders and tailed frogs. Finally, extended larval periods for all SAA (Metter, 1964;Nussbaum and Clothier, 1973;Tait and Diller, 2006), and the degree to which these larval periods may vary due to environmental factors, may slow SAA population recovery when impacted.…”

Section: Life-history and Population Parametersmentioning

confidence: 99%

“…), American dippers (Cinclus mexicanus), foothill yellow-legged frogs (Rana boylii), water shrews (Sorex palustris), river otters (Lutra canadensis), and weasels (Mustela spp.) are known to be predators of tailed frogs and giant salamanders (Metter, 1964;Nussbaum et al, 1983;Lind and Welsh, 1990;Morrissey and Olenick, 2004). However, relationships with other within-stream organisms, primarily fish and crayfish, may have a more pronounced effect on SAA.…”

Section: Species Interactionsmentioning

confidence: 99%

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Sources of uncertainty in stream-associated amphibian ecology and responses to forest management in the Pacific Northwest, USA: A review

Kroll

2009

Forest Ecology and Management

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Section: Life-history and Population Parametersmentioning

confidence: 99%

Section: Species Interactionsmentioning

confidence: 99%

Sources of uncertainty in stream-associated amphibian ecology and responses to forest management in the Pacific Northwest, USA: A review

Kroll

2009

Forest Ecology and Management

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“…Tailed frog larvae from northern and inland populations spend two to three years in streams before metamorphosing into juveniles (Metter, 1964(Metter, , 1967Dougherty and Sheldon, 1982;Bull and Carter, 1996). Tailed frog larvae from northern and inland populations spend two to three years in streams before metamorphosing into juveniles (Metter, 1964(Metter, , 1967Dougherty and Sheldon, 1982;Bull and Carter, 1996).…”

Section: Mountains Of Southeastern Washington/northeastern Oregon Andmentioning

confidence: 99%

Length of the Larval Cycle of Ascaphus truei in Coastal Streams of the Redwood Region, Northern California

Wallace¹,

Diller²

1998

Journal of Herpetology

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“…It retains many morphological features that have been lost in all other extant anuran lineages [reviewed in (Nielson et al, 2001)] and is the only North American frog that reproduces by internal fertilization. It inhabits cold, forested streams and has evolved several adaptive features to survive in this environment (Metter, 1964). Ascaphus occupies two disjunct ranges in the northwest region of North Americathe Cascade Mountains and coastal region from British Columbia south to Northern California, and an inland range in the northern Rocky Mountains and the Blue and Wallowa mountains (Nussbaum et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

Peptidomic analysis of skin secretions supports separate species status for the tailed frogs, Ascaphus truei and Ascaphus montanus

Conlon

Bevier

Coquet

et al. 2007

Comparative Biochemistry and Physiology Part D: Genomics and Pr

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analysis of skin secretions supports separate species status for the tailed frogs, Ascaphus truei and Ascaphus montanus" (2007). USGS AbstractThe tailed frog Ascaphus truei Stejneger, 1899 is the most primitive extant anuran and the sister taxon to the clade of all other living frogs. The species occupies two disjunct ranges in the Northwest region of North America: the Cascade Mountains and coastal area from British Columbia to Northern California, and an inland range in the northern Rocky Mountains and the Blue and Wallowa mountains. A previous study led to the isolation of eight peptides with antimicrobial activity (termed the ascaphins) from skin secretions of A. truei from the coastal range. The present study has used peptidomic analysis to identify the products of orthologous ascaphin genes in electrically-stimulated skin secretions from inland range specimens. Structural characterization of the peptides demonstrated that ascaphins from the inland range contained the following amino acid substitutions compared with orthologs from the coastal range frogs: ascaphin-1 (Ala 12 → Glu), ascaphin-3 (Asp 4 → Glu), ascaphin-4 (Ala 19 → Ser), ascaphin-5 (Lys 12 → Thr), and ascaphin-7 (Gly 8 → Ser and Ser 20 → Asn). Orthologs of ascaphins-2, -6, and -8 were not identified but a paralog of ascaphin-5, identical to ascaphin-5 from coastal range frogs, was found. The data support the claims, derived from analysis of the nucleotide sequences of mitochondrial genes, that the inland populations of the tailed frog should be recognized as a distinct species, the Rocky Mountain tailed frog Ascaphus montanus and that the divergence of the species from A. truei probably occurred in the late Miocene (approximately 10 Mya).

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A Morphological and Ecological Comparison of Two Populations of the Tailed Frog, Ascaphus truei Stejneger

Cited by 60 publications

References 7 publications

Sources of uncertainty in stream-associated amphibian ecology and responses to forest management in the Pacific Northwest, USA: A review

Sources of uncertainty in stream-associated amphibian ecology and responses to forest management in the Pacific Northwest, USA: A review

Length of the Larval Cycle of Ascaphus truei in Coastal Streams of the Redwood Region, Northern California

Peptidomic analysis of skin secretions supports separate species status for the tailed frogs, Ascaphus truei and Ascaphus montanus

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