Thermal selection of bullfrog tadpoles (rana catesbeiana) at different stages of development and acclimation tempeatures

Hutchison, Victor H.; Hill, Loren G.

doi:10.1016/0306-4565(78)90038-4

Cited by 34 publications

(12 citation statements)

References 13 publications

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“…Factors that may alter the PBT in amphibians include trophic state (Seymour 1972, Lillywhite et a!. 1973, acclimation temperature (Feder and Pough 1975, Keen and Schroeder 1975, Hutchison and Hill 1976, developmental stage Brown 1967, Hutchison andHill 1978), environmental moisture (Licht and Brown 1967), oxygen availability (Brattstrom 1979 1978), and availability of appropriate environmental temperatures (Carey 1978).…”

Section: Discussionmentioning

confidence: 99%

Thermal Ecology of Neotropical Lungless Salamanders (Amphibia: Plethodontidae): Environmental Temperatures and Behavioral Responses

Feder¹

1982

Ecology

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In a substrate thermal gradient in the laboratory, seven species of neotropical plethodontid salamanders exhibited distinct thermal preferences. The mean substrate temperature selected in the gradient (preferred body temperature, PBT) was affected by acclimation temperature and feeding in some species, and was negatively correlated with the elevation at which each species was collected. Regulation of the PBT was imprecise and only partially compensated for changes, in environmental temperatures. Even though tropical plethodontids are capable of thermoregulation, they may be unable to thermoregulate in the field because of limited thermal diversity in their microhabitats. Temperatures within typical salamander microhabitats such as bromeliads (Tillandsia sp.) and banana plants (Musa sp.) ranged only 2° and 3.7°C, respectively. Diverse temperatures were available nearly in each case, but would have involved exposure to direct light or dehydrating conditions. Water relations may limit thermoregulation in salamanders because hydric requirements restrict salamanders to moist microhabitats, which may have limited thermal diversity. However, in atypical field situations in which moist thermal gradients are available, some terrestrial salamanders (e.g., Thorius narisovalis) are capable of regulating their body temperatures.

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Section: Discussionmentioning

confidence: 99%

Thermal Ecology of Neotropical Lungless Salamanders (Amphibia: Plethodontidae): Environmental Temperatures and Behavioral Responses

Feder¹

1982

Ecology

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“…19881. Ontogenic changes in preferred body tempera ture (PT) have been demonstrated in amphibians, including the bullfrog [Lillywhite, 1974;Hutchison and Hill, 1977;Dupre et al 1985Dupre et al , 1986. The PT varies by as much as 4 C, increasing prior to metamorphosis and declining rapidly when the frogs emerge as juveniles [Hutchison and Hill, 1977J.…”

Section: Introductionmentioning

confidence: 99%

Development of Bombesin-Like and Histamine-Like Innervation in the Bullfrog <i>(Rana catesbeiana) </i>Central Nervous System

Wb²

1997

Brain Behav Evol

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Amphibians rely exclusively on behavioral thermoregulation to maintain body temperature within species- and developmental stage-specific critical limits. Several members of the bombesin family of peptides and histamine are included in a class of neurochemicals that have potent thermoregulatory effects in ectothermic and endothermic vertebrate species and may be involved in behavioral thermoregulation in amphibians. Because amphibians respond to environmental temperature cues differently in larval versus adult animals, we used immuno-cytochemistry to study developmental changes in bombesin-like (BN) and histamine-like (HA) innervation in the bullfrog brain and spinal cord. Neurons and fibers that were BN-immunoreactive and HA-immunoreactive were present in the earliest stage tadpoles examined (Gossner stage 29); BN-immunoreactive perikarya were found only in the preoptic area, posterior thalamic nucleus and in the rostroventral tegmentum of the mesencephalon. In the preoptic area, dramatic changes were observed in the number and staining intensity of BN-ir so-mata; neuronal labelling was greatest in tadpoles undergoing tail resorption (i.e. metamorphic climax) and was nearly absent in adults. Neurons immunoreactive to BN in the ventral mesencephalon also were developmental stage-dependent; limb-bud growth stage tadpoles had the largest numbers of labelled neurons, whereas in the adults, labelled cells were rarely visible in this area. The highest density of fibers was in the medial septum, lateral amygdala, and the optic tectum. Fewer fibers were observed within the dorsal and ventral hypothalamus, the pineal gland, and all the thalamic nuclei. Perikarya immunoreactive to HA were localized in the dorsal infundibular nucleus of the hypothalamus. Immunoreactivity was present in all developmental stages examined, and the numbers of labelled cells increased throughout metamorphosis to a maximum in adult brains. Fibers were found in the medial septum, medial amygdala, preoptic area, thalamus, pineal gland, hypothalamus and optic tectum. These results show that BN- and HA-immunoreactivities are established early in larval development, but their phenotypes are differentially expressed during larval and adult growth stages. This pattern suggests that reorganization of BN-like and HA-like neural circuitry may occur during metamorphosis and may be involved in the reported developmental changes in amphibian thermoregulation. In addition, BN-like peptides and HA may modulate other related mechanisms of amphibian thermoregulation and behaviour, such as thermal acclimation, circadian shifts in temperature selection and feeding. To what extent they are involved in amphibian thermoregulation remains to be investigated.

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“…However, it is curious that tadpoles that had been growing quickly would choose temperatures that might slow their growth, suggesting that there may be costs and selective pressure against rapid larval development (Gomez-Mestre et al, 2010). When thermal rearing environment has been investigated in other anurans and fish, its effects on behaviour are species-specific ranging from negligible (Hutchinson & Hill, 1978;Wollmuth et al, 1987) to counter-gradient responses (Fangue, Podrabsky, Crawshaw, & Schulte, 2009;Freidenburg & Skelly, 2004). Our results show that for R. boylii the response does not appear to be genetic, since there were no differences in preference when we reared tadpoles from disparate regions in a common-garden setting (Trial 3).…”

Section: Discussionmentioning

confidence: 99%

Variation in thermal niche of a declining river‐breeding frog: From counter‐gradient responses to population distribution patterns

Catenazzi

Kupferberg

2017

Freshwater Biology

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When dams or climate change alter the thermal regimes of rivers, conditions can shift outside optimal ranges for aquatic poikilothermic vertebrates. Plasticity in thermal performance and preference, however, may allow temperature‐vulnerable fauna to persist under challenging conditions. To determine the effects of thermal regime on Rana boylii (Ranidae), a threatened frog species endemic to rivers of California and Oregon, we quantified tadpole thermal preferences and performance in relation to thermal conditions. We monitored temperature and censused populations across a coastal to inland cline in six catchments where dams have altered thermal environments in close proximity to river reaches with natural conditions. We found geographic variation in population distribution and abundance based on river size combined with water temperature. The large inland rivers that supported breeding frogs, although cooler in spring due to snowmelt, became warmer during the summer than occupied coastal sites. Inland populations were constrained to reaches where the average temperature over the warmest 30 days ranged from 17.6 to 24.2°C, higher than coastal rainfall‐driven systems where averages ranged from 15.7 to 22.0°C. Frogs in rivers with hypolimnetic‐release dams bred in colder waters than they did in free‐flowing rivers. Common‐garden and field translocation experiments revealed local adaptations in larval growth and phenotypically plastic thermoregulatory behaviour. Tadpoles from all rivers had a positive linear growth response to temperature, but individuals from inland rivers displayed intrinsically higher growth rates. Consistent with a counter‐gradient model of selection in which the response to temperature change is in the opposite direction of the change, individuals from cooler rivers selected warmer temperatures. When reared under common conditions, however, tadpoles showed similar temperature preferences regardless of source river. Our results suggest a role for local growth rate adaptation in structuring the distribution of Rana boylii. Plastic thermoregulatory behaviour by tadpoles may explain how small populations are able to persist where dams release cold water. Management of edgewater habitats to increase the availability of warm micro‐sites may ameliorate this impact.

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Thermal selection of bullfrog tadpoles (rana catesbeiana) at different stages of development and acclimation tempeatures

Cited by 34 publications

References 13 publications

Thermal Ecology of Neotropical Lungless Salamanders (Amphibia: Plethodontidae): Environmental Temperatures and Behavioral Responses

Thermal Ecology of Neotropical Lungless Salamanders (Amphibia: Plethodontidae): Environmental Temperatures and Behavioral Responses

Development of Bombesin-Like and Histamine-Like Innervation in the Bullfrog <i>(Rana catesbeiana) </i>Central Nervous System

Variation in thermal niche of a declining river‐breeding frog: From counter‐gradient responses to population distribution patterns

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