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Showing 1 to 20 of 88 for “"tadpoles"”.
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A study of lungs in Rana catesbeiana tadpoles
… uptake at 15°C and below.</p><p>Rana catesbeiana tadpoles were used in these experiments. They were obtained from the Mokelumne River on Highway 88, two miles west of Clements, California</p><p>The function of the lungs in Rana catesbeiana tadpoles was studied.</p>
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Respiratory quotient during metamorphosis of Hyla regilla tadpoles
… the rate of oxygen uptake in developing tadpoles has been well studied and documented, only a single reference on carbon dioxide release could be found. Belehradek and Huxley (1927) noted that carbon dioxide output increased immediately after the feeding of thyroid to frog tadpoles, but …
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The Inhibition of Growth in Crowded Rana Pipiens Tadpoles
Made available in DSpace on 2015-05-12T17:15:37Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0025272.PDF: 1006594 bytes, checksum: 1db63fc341b4c947cac744aa6dd0f91a (MD5) Previous issue date: 1957
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Size-structured competition and predation in red-eyed treefrog tadpoles
… intraspecific competition between A. callidryas tadpoles and then explore how predation affects these interactions. To determine the strength of inter-cohort competition, we manipulated the density and relative proportion of large and hatchling tadpoles in a response surface design and quantified …
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Possible Effects Of Climate Change On Induced Defenses In Tadpoles
… components of temporary pond systems, and their tadpoles can exhibit a great amount of plasticity in morphology and life history traits due to environmental change. For example, tadpoles can alter their morphology in response to specific predators. These induced defenses have been found to …
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Patterns and mechanisms of phenotypic plasticity in poison frog tadpoles
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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The environmental physiology of Bufo bufo L. and Bufo calamita Laur. tadpoles.
… and metamorphosis in B. bufo and B. calamita tadpoles were investigated, together with a limited study on the effects of L-thyroxine. The effects of density on growth, developteI1t and metamorphosis were examined. Physiological and behavioural effects of B. bufo tadpoles on B. calamita …
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Results of feeding thyroid glands of various types of vertebrates to tadpoles
Dissertation (Ph.D.)--University of Kansas, Zoology, 1923.
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Influences of atrazine on gonadal differentiation in Xenopus laevis tadpoles during metamorphosis
Xenopus laevis tadpoles were exposed for 48, 96 and 144 h during sexual differentiation to 1.8, 19 and 48 og/L atrazine. Following the exposure, tadpoles were microdissected for histological examination of the gonadal-kidney complex. The experimental tadpoles showed no significant difference in …
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Effects of Atrazine and Metolachlor on Snails, Tadpoles, and Their Trematode Parasites
… hosts, Rana clamitans and Rana sylvatica tadpoles, to the pesticide mixtures and examined subsequent infection levels in the tadpoles. The atrazine and metolachlor mixtures had no significant effects on parasite load in the laboratory. Newly shed parasites were more likely than 10 hours …
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ASSESSING THE GENOTOXICITY OF TRICLOSAN IN TADPOLES OF THE AMERICAN BULLFROG, LITHOBATES CATESBEIANUS.
… agent Triclosan to American Bullfrog tadpoles. Lithobates catesbeianus tadpoles were reared in glass aquaria containing ultra-high purity water and were dosed with nominal concentrations of 2.3 µg/L, 23 µg/L, and 230 µg/L Triclosan, reflecting 1x, 10x, and 100x concentrations of the …
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The sublethal effects of 2,4-D dimethylamine on wood frog tadpoles in Saskatchewan
… 2,4-dichlorophenoxyacetic acid (2,4-D) on tadpoles of the wood frog (Rana sylvatica). Wood frog tadpoles in the first experiment were exposed to 2,4-D amine at 0.1, 1.0 and 100 ug/L in outdoor microcosms. Morphometric measures (total length, snout-vent length (SVL) and wet weight) were …
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Priority effects of overwintered Rana tadpoles on larval Southern toad (Bufo terrestris Bonnaterre)
… breeding southern leopard frogs, whose tadpoles must remain in the ponds until the following spring. Tadpoles of spring-breeding anurans, including Southern toads, are adversely affected by the presence of large tadpoles from the prior summer. I examined several mechanisms potentially …
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Effects of Infection of the Protist Parasite, Dermomycoides sp., in Dusky Gopher Frog Tadpoles
… zoospores, host developmental stage, and tadpoles' ability to acquire resistance to <em>Dermomycoides </em>sp. on dusky gopher frog tadpoles. Tadpoles were exposed to zoospore densities of 0, 250, 500, and 750 zoospores/µL at Gosner stage 25, and we found no significant differences among …
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Effects of Sublethal Copper Exposure on Escape Behavior and Growth of Rana pipiens Tadpoles
… tadpole predator-escape behavior and how quickly tadpoles recover. After exposure, tadpoles were separated. Escape behavior was recorded for two-thirds of exposed tadpoles while one-third of the exposed population was measured weekly to determine growth and recovery. Control tadpoles were consumed …
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Predator Out of Place : The Differential Impacts of Native and Non-native Crayfish on Bufo Tadpoles
… larval anurans. Uncommonly studied predators of tadpoles include crayfish. Both native and introduced crayfish occur in NC. To gain a better understanding of the effect of introduced crayfish in NC, we examined the impact of native (Procambarus acutus) and introduced (P. clarkii) crayfish on …
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Fecal Bacterial Communities as an Indicator of Trophic Interactions Among Anuran Larvae
… spawning together, resulting in thousands of tadpoles sharing a habitat. Such large numbers of tadpoles with limited dispersal can lead to intense competition for resources. Inter and intra-specific competition for food could have negative impacts on the growth and survival of smaller …
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Sub-lethal and lethal effects of a neonicotinoid pesticide on the development of Northern leopard frog tadpoles.
… developmental effects in Northern leopard frog tadpoles exposed to three concentration levels (250 ng/L, 8.5 mg/L, and 85 mg/L) of imidacloprid in a laboratory setting. Survivorship was 0% by day 23 of exposure to imidacloprid at the previously lowest known LC50 value for frogs of 85 mg/L. This …
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