Seasonal and daily plasma corticosterone rhythms in American toads, Bufo americanus

Pancak, Martha K.; Taylor, Douglas H.

doi:10.1016/0016-6480(83)90271-x

Cited by 66 publications

(32 citation statements)

References 14 publications

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“…High plasma cs levels also occur in cobras on emergence from hibernation (Tam et al, 1972) and in birds and salmon before and during migration to winter feeding sites and to the ocean, respectively (Meier and MacGregor, 1972;Shapovalov and Taft, 1954;Specker and Schreck, 1982). Similar changes in CS concentrations have been observed in toads (Pancak and Taylor, 1983), frogs , lizards (Daughtery and Callard, 1972), newts (Heier et al, 1971) and in T. s. parietalis (Whittier et al, 1987a). High plasma cs levels occurring on emergence and the decreases seen in March and April are consistent with CS levels observed in other studies involving T. s. parietalis (Camazine et al, 1980;Hawley and Aleksiuk, 1976;Krohmer et al, 1987).…”

Section: Corticosterone Levelssupporting

confidence: 65%

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Development of morphological forms in four-year-old children

Thompson¹

2000

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Mechanisms of how red-sided garter snakes (Thamnophis sirtalis parietalis) travel up to 18 km from summer feeding sites to hibernation dens are not understood.In this study, monthly and seasonal trailing behavior were investigated to determine whether red-sided garter snakes prefer to follow trails of snakes from the same den (den-mates) versus trails made by other conspecifics (non-den-mates). Snakes from five different hibernacula in Manitoba, Canada, were involved in the study. Eighteen were adults and 15 were subadults. Subadult red-sided garter snakes do not return 2 to hibernacula until their second year of life, so their trailing behavior was of interest in learning how they might first find hibernation sites.Since hormonal factors may play a role in trailing behavior, and, since corticosterone (CS) has been associated with migration and homing in other vertebrates, plasma CS concentrations were also investigated monthly and seasonally.A wooden Y-maze with slots for blocking the two arms was used in the study. Overall, the snakes trailed conspecifics in the spring but showed no preferences for trails of den-mates or non-den-mates. When adults' and subadults' behaviors were studied separately, no significant trai.ling tendencies were observed in the adults. Subadults preferred to follow den-mates in the fall and five weeks' post-emergence, corresponding with the time of migration to hibernacula and migration to summer feeding sites, respectively. Two-way analysis including age as a factor showed no age by month interaction; that is, age appeared to have no effect on CS levels during any particular month.

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Section: Corticosterone Levelssupporting

confidence: 65%

“…American toads (Bufo arnericanus) exhibit seasonal and daily CS rhythms, and the control appears to be unrelated to photoperiod (Pancak and Taylor, 1983). That is, toads maintained on 12L:l2D cycles show seasonal rhythms similar to those of animals maintained under natural photoperiods.…”

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confidence: 99%

Development of morphological forms in four-year-old children

Thompson¹

2000

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“…However, CORT often increases in response to increased metabolic and energetic demands; therefore, peak CORT levels generally coincide with peak activity levels. For instance, CORT peaked at dusk (1730 h) and was lowest in the morning (0930 h) in the nocturnal toad, Anaxyrus (=Bufo) americanus (Pancak and Taylor, 1983), and in diurnal reptiles, corticosterone was lowest at night (2100 h) in the skink, Egernia whitii (Jones and Bell, 2004), and the iguana, Amblyrhynchus cristatus (Woodley et al, 2003). There was no influence of time of day on CORT levels in the tuatara, Sphenodon punctatus (Tyrrell and Cree, 1998) or the hellbender, Cryptobranchus alleganiensis (Hopkins and DuRant, 2011).…”

Section: Captive Stress Protocolmentioning

confidence: 82%

Corticosterone–immune interactions during captive stress in invading Australian cane toads (Rhinella marina)

Graham

Kelehear

Brown

et al. 2012

Hormones and Behavior

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“…Corticosterone levels vary seasonally (Licht et al, 1983;Pancak and Taylor, 1983;Dupont et al, 1979;Jolivet-Jaudet and Ishii, 1985;Zerani and Gobbetti, 1993), are socially modulated (Burmeister and Wilczynski, 2000), and are thought to contribute to the regulation of male reproductive behaviors in both anurans (Marler and Ryan, 1996) and urodeles (reviewed in Moore and Rose, 2002, Moore et al, this issue). For example, in male rough-skinned newts (T. granulosa), corticosterone rapidly inhibits male clasping behavior.…”

Section: Steroid Hormones and Courtship Behavior In Male Amphibians: mentioning

confidence: 99%

Current research in amphibians: Studies integrating endocrinology, behavior, and neurobiology

Wilczynski

Lynch

O'Bryant

2005

Hormones and Behavior

107

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Amphibian behavioral endocrinology has focused on reproductive social behavior and communication in frogs and newts. Androgens and estrogens are critical for the expression of male and female behavior, respectively, and their effects are relatively clear. Corticosteroids have significant modulatory effects on the behavior of both sexes, as does the peptide neuromodulator arginine vasotocin in males, but their effects and interactions with gonadal steroids are often complex and difficult to understand. Recent work has shown that the gonadal hormones and social behavior are mutually reinforcing: engaging in social interactions increases hormone levels just as increasing hormone levels change behavior. The reciprocal interactions of hormones and behavior, as well as the complex interactions among gonadal steroids, adrenal steroids, and peptide hormones have implications for the maintenance and evolution of natural social behavior, and suggest that a deeper understanding of both endocrine mechanisms and social behavior would arise from field studies or other approaches that combine behavioral endocrinology with behavioral ecology.

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Seasonal and daily plasma corticosterone rhythms in American toads, Bufo americanus

Cited by 66 publications

References 14 publications

Development of morphological forms in four-year-old children

Development of morphological forms in four-year-old children

Corticosterone–immune interactions during captive stress in invading Australian cane toads (Rhinella marina)

Current research in amphibians: Studies integrating endocrinology, behavior, and neurobiology

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