Results 81 to 90 of about 132,738 (254)

Environmental DNA (eDNA) Quantitative Polymerase Chain Reaction‐Based Assays for Surveying 125 Taxa of Importance to North America

open access: yesEnvironmental DNA, Volume 7, Issue 3, May–June 2025.
We present 125 eDNA quantitative real‐time polymerase chain reaction (qPCR) assays against animal species of importance to North America. We show how these assays were designed and validated to comply with the Canadian national eDNA standards to allow confident eDNA detection for coastal and inland ecological surveys and biosurveillance.
Valerie S. Langlois   +22 more
wiley   +1 more source

Sensitivity to nitrate and nitrite in pond-breeding amphibians from the Pacific northwest, USA [PDF]

open access: yes, 1999
In static experiments, we studied the effects of nitrate and nitrite solutions on newly hatched larvae of five species of amphibians, namely Rana pretiosa, Rana aurora, Bufo boreas, Hyla regilla, and Ambystoma gracile.
Blaustein, Andrew R.   +2 more
core   +1 more source

Perichordal Vertebral Column Formation in Rana kobai

open access: yesJournal of Morphology, Volume 286, Issue 4, April 2025.
In contrast to the previous study, centrum formation begins with a pair of ossification centers at the base of neural arches in Rana. At the early stage of intervertebral disc formation, a wedge‐like cartilage domain is observed posteroventral to the centrum. Evolutionary implications are discussed based on these observations.
Yu Takahashi   +5 more
wiley   +1 more source

Molecular Characterization of Thyroid Hormone Receptors (TRs) and their Responsiveness to T3 in Microhyla fissipes [PDF]

open access: yes, 2018
To explore and enrich the molecular mechanisms of thyroid hormone receptors (TRs) in the metamorphosis of amphibians, the cDNA sequences of TR alpha and TR beta in Microhyla fissipes were cloned and characterized.
Jiang, Jianping   +3 more
core   +1 more source

Efeito da temperatura sobre o desempenho da rã-touro (Rana catesbeiana Shaw, 1802) Temperature effect on performance of bull-frog (Rana catesbeiana Shaw, 1802)

open access: yesRevista Brasileira de Zootecnia, 1999
Este estudo foi realizado para avaliar os efeitos do ambiente sobre a performance de rã-touro (Rana catesbeiana Shaw, 1802), criada em gaiolas de fibra de vidro instaladas no interior de estufas climatizadas.
Mario Roberto Chim Figueiredo   +3 more
doaj   +1 more source

Identification and Characterization of Klebsiella pneumoniae from Farmed American Bullfrogs (Rana catesbeiana). [PDF]

open access: yesMicrobiol Spectr, 2023
Lin H   +9 more
europepmc   +1 more source

Konservasi Amfibi Di Indonesia: Masalah Global Dan Tantangan1) (Conservation of Amphibian in Indonesia: Global Problems and Challenges) [PDF]

open access: yes, 2007
This paper reviews potential causes of amphibian population declines in Indonesia in relation to global amphibian declines. At least six factors were identified: over-harvesting, loss of forest and wetland habitats, pollution, disease, introduction of ...
Kusrini, M. D. (Mirza)
core  

Late Pleistocene and Early Holocene Vertebrates and Paleoenvironments on the Southern High Plains, U.S.A. [PDF]

open access: yes, 1986
Only a few vertebrate faunas are known for the Southern High Plains from the late Pleistocene and early Holocene. This review focuses on vertebrate local faunas from two major localities on opposite sides of the region but in the same drainage system ...
Johnson, Eileen
core   +1 more source

ESTAÇÃO DE REPRODUÇÃO DA Rana catesbeiana Shaw, 1802 , CRIADO EM RANÁRIO COMERCIAL E A INFLUí­Å NCIA DE FATORES CLIMÁTICOS SOBRE O Ní­Å¡MERO DE RESERVAS

open access: yesBoletim do Instituto de Pesca, 2018
Foram determinados a época de reprodução e os efeitos de fatores climáticos sobre o número de desovas diárias em 2000 casais de "rã-touro", Rana catesbeiana Shaw, 1802, criados em ranário comercial, nos anos de 1978 a 1979 e 1981 a 1982. A reprodução da
Dorival FONTANELLO   +6 more
doaj  

Natural occurrences and characterization of Elizabethkingia miricola infection in cultured bullfrogs (Rana catesbeiana). [PDF]

open access: yesFront Cell Infect Microbiol, 2023
Wei D   +9 more
europepmc   +1 more source

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