Metabolic response to temperature acclimation and T4 in the water snake

Turner, James; Tipton, Samuel R.

doi:10.1016/0016-6480(72)90085-8

Cited by 25 publications

(3 citation statements)

References 11 publications

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“…reproduction. There There is is a a direct direct relationship relationship between between temperature temperature and and iodine iodine uptake uptake by by the the thyroid thyroid (Turner (Turner & & Tipton, Tipton, 1 1972a), 972a), and and cold cold temperatures temperatures can can also also reduce reduce target target tissue tissue response response to to thyroid thyroid hormones hormones (T 4 ) (Turner (Turner & & Tipton, Tipton, 1972b). 1972b.…”

Section: Environmental Influences Influencesmentioning

confidence: 99%

“…Thyroid hormone warrants specific attention as a potential regulator between temperature and reproduction. There is a direct relationship between temperature and iodine uptake by the thyroid (Turner & Tipton, 1972a), and cold temperatures can also reduce target tissue response to thyroid hormones (Turner & Tipton, 1972b). As in other taxa, thyroxine (T4) increases tissue metabolism in snakes (Thapliyal, Kumar, & Gommen, 1975), but it may also have a direct effect on reproduction.…”

Section: Environmental Influencesmentioning

confidence: 99%

“…Gen. Compo Compo Endocrinol.,Endocrinol.,18,18,[195][196][197]. Turner, Turner, J. J. E., E., & & Tipton, Tipton, S. S. R. R. (1972b). Metabolic Metabolic response response to to temperature temperature acclimation acclimation and and T T4 4 in in the the water water snake.…”

Section: T Andmentioning

confidence: 99%

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Hormones and Reproductive Cycles in Snakes

Taylor

DeNardo

2011

Hormones and Reproduction of Vertebrates

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The The study study of of the the hormonal hormonal regulation regulation of of reproduction reproduction in in snakes snakes is is in in its its infancy. infancy. Studies Studies have have disproportionately disproportionately examined examined temperate temperate zone zone viperid viperid and and colubrid colubrid snakes, snakes, especially especially the the red red sided sided garter garter snake snake (Thamnophis (Thamnophis sirtalis sirtalis parietalis). parietalis). Indeed, Indeed, extensive extensive observational observational and and experimental experimental studies studies on on T. T. s. s. parie parie talis talis form form the the basis basis for for our our understanding understanding of of the the hormonal hormonal regu regu lation lation of of reproduction reproduction in in snakes. snakes. This This review review focuses focuses on on seasonal seasonal hormone hormone concentrations concentrations in in snakes snakes in in relation relation to to events events in in the the reproductive reproductive cycle; cycle; the the limited limited data data available available on on hypothalamic hypothalamic hormones, hormones, gonadotropins gonadotropins (GTHs),

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Section: Environmental Influences Influencesmentioning

confidence: 99%

Section: Environmental Influencesmentioning

confidence: 99%

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Hormones and Reproductive Cycles in Snakes

Taylor

DeNardo

2011

Hormones and Reproduction of Vertebrates

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Thyroid and skin‐shedding in the rat snake (Ptyas korros)

1983

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Epidermal-thyroid relationships were studied in thyroidectomized (Tx) Ptyas korros kept at 23°C by observing changes in shedding frequency (SF), body weight, oxygen consumption rate (OCR), and postsurgical survival. Tx animals showed increased SFs but lost weight and eventually died, as did Tx animals receiving 3-mono-iodotyrosine injections. However, injections of 3,5-diiodothyronine inhibited shedding and the animals survived longer. OCRs were similar in all control and experimental groups. It is concluded that among thyroid secretions, only iodothyronines inhibit shedding. Snake shedding is concluded not to reflect general metabolic status as it does in lizards. A striking effect of thyroidectomy on snakes has been heretofore overlooked: The animals invariably die, suggesting that, in contrast to mammals, the snake thyroid gland is essential to life. With this "secondary effect," i.e., maintenance of viability in mind, we have reexamined thyroid-epiderma1 relationships in snakes.Wong and Chiu ('74) and Chiu et al. ('75) have reported that the blood of intact snakes contains a number of iodoamino acids not readily detectable in other vertebrates, e.g., the iodotyrosines which are normally regarded as precursors of other thyroid secretions. Since these data imply a uniqueness for snake thyroid metabolism (Chiu and Wong, '75, '78), we have examined the effects of 3-mono-iodotyrosine and 3, 5-diiodothyronine on the SF of Tx snakes. MATERIALS AND METHODSFifty commercially purchased mature male rat snakes (Ptyas korros) were kept in six cages containing groups of eight or nine animals each in a constant temperature room at 23°C on a 12/12-hr light/dark cycle, were provided with water, but were not fed. Groups 1 to 5 were thyroidectomized and treated as follows: Group 1, each animal received 8 pg 3,5-diiodothyronine (T2) on alternate days; group 2, each animal received 8 pg L-thyronine on alternate days; group 3, each animal received 0

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Preliminary study of the influence of thyroxine, temperature, and sex on oxygen uptake by tissues from the spadefoot toad Scaphiopus bombifrons

Packard

1973

General and Comparative Endocrinology

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Metabolic response to temperature acclimation and T4 in the water snake

Cited by 25 publications

References 11 publications

Hormones and Reproductive Cycles in Snakes

Hormones and Reproductive Cycles in Snakes

Thyroid and skin‐shedding in the rat snake (Ptyas korros)

Preliminary study of the influence of thyroxine, temperature, and sex on oxygen uptake by tissues from the spadefoot toad Scaphiopus bombifrons

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