Contribution à l'étude de la reproduction de l'urodèle Euproctus asper (Dugês) dans les Pyrénées centrales et Ariégeoises

Clergue-Gazeau, M.; Beetschen, Jean-Claude

doi:10.1051/limn/1966012

Cited by 4 publications

(3 citation statements)

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“…There is possibly a strict selection for small body individuals that can hide from floods [36], because the number and dimensions of refuges such as stones and fissures define the density and distribution of newts [37]. In Calotriton asper annual active life varies from 4 to 8 months or more [13], also the duration of the larval phase varies from 1 to 3 years or more [16,38]. We do not know water temperature or variations in trophic conditions for the Calotriton asper populations that we studied.…”

Section: Discussionmentioning

confidence: 99%

Demographic Traits Variation in a Pyrenean Newt (Calotriton asper) among Lacustrine and Stream Populations

et al. 2020

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Demographic traits were analyzed in the Pyrenean brook newt (Calotriton asper) to evaluate whether its variability responds to the adaptation to the different habitats. In this study, life history traits of Calotriton asper were studied in nine populations living in two different kinds of habitats in the Pyrenees mountains: lakes and streams. Skeletochronology was used to determine age structure and different traits such as age at maturity and longevity. Age structure was different between populations and sexes. The two lacustrine populations, with facultative pedomorphosis, attained their maturity earlier. Age at sexual maturity ranged from 4 to 9 years and in some populations was similar between sexes while in others, females matured at younger ages than males. Maximum longevity varied from 7 to 35 years among populations and was correlated with the age at sexual maturity. Body size differed among populations, was sexually dimorphic, and this disparity was not related to the kind of habitat. The maximum size was found in the lacustrine population but exhibited high variation between populations. The results obtained show a significant variability between sexes and populations, in age and body size structure of Calotriton asper that did not depend on the habitat.

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Section: Discussionmentioning

confidence: 99%

Demographic Traits Variation in a Pyrenean Newt (Calotriton asper) among Lacustrine and Stream Populations

et al. 2020

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“…It has been described that the amplexus in this species has a long duration and also that reproduction involves high energy demands (Harshman Zera, 2007;Cogălniceanu et al, 2013;Reedy et al, 2014), but there are no previous data about what happens specifically during amplexus and no causality can be associated with the observed increase in cloacal temperature. As explained above, in cold-water amphibian populations like those of C. asper, the window of favourable temperatures for the reproduction is small (15°C, limited to July and August; Clergue-Gazeau, 1983). Newts seem to choose the opportunity to maximize metabolism modifying their SMR during favourable periods, and C. asper is known to have a slight phenotypic plasticity in SMR (Guillaume et al, 2020).…”

Section: Cloacal Temperature During Amplexusmentioning

confidence: 99%

“…This cold and relatively wide range affects its biological and ecological traits, such as standard metabolic rate (SMR), oxygen consumption, activity period, and morphometry, among others (Clergue-Gazeau, 1987;Serra-Cobo et al, 2000;Trochet et al, 2018Trochet et al, , 2019Deluen, 2022;Deluen et al, 2022). At high altitude, the yearly window of favourable temperatures for reproduction is reduced to practically two months (Clergue-Gazeau, 1983), while in the populations at medium or low altitude the range of optimal temperatures extends much longer, or may be temporarily reversed (Clergue-Gazeau, 1983, 1987.…”

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confidence: 99%

Is the Pyrenean newt (<em>Calotriton asper</em>) a thermoconformer? Cloacal and water temperature in two different thermal periods in a Pre-Pyrenean stream population

Montori

2024

bah

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In ectothermic animals, heat seems to be a determining factor because it influences many vital activities such as locomotion, the ability to escape, feeding, and reproduction, among others. In aquatic environments, physical characteristics of water prevent small ectotherms from thermoregulating and therefore it is expected that their body temperature remains similar to water temperature. Throughout its distribution and annual cycle, the Pyrenean newt (Calotriton asper) is exposed to a wide range of water temperatures that affect its biological and ecological traits like the standard metabolic rate, oxygen consumption, activity period and growth pattern. This study analyses the relationship between the cloacal and water temperatures in a Pre-Pyrenean population of C. asper in two periods with well differentiated water temperatures (July and September). The aims are to establish if there are differences between sexes in cloacal temperature, whether reproductive activity modifies cloacal temperature, and to analyse the degree of thermoconformity of the species. The results indicate that cloacal temperature depends on the water temperature, corroborating the idea that C. asper is mainly a thermoconformer, as it corresponds to an aquatic ectotherm. However, the cloacal temperature of newts was slightly higher than water temperature. In individuals in amplexus, cloacal temperature was significantly higher than in specimens that are not in this mating position, and in July, females showed much greater dispersion in cloacal temperature than males, which is probably related to spawning behaviour.

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Cartographie des proteines seriques de l'urodele pyreneen Euproctus asper (duges): Stabilite dans l'aire de repartition de l'espece

Gasser

1973

Comparative Biochemistry and Physiology Part B: Comparative Bio

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Contribution à l'étude de la reproduction de l'urodèle Euproctus asper (Dugês) dans les Pyrénées centrales et Ariégeoises

Cited by 4 publications

References 0 publications

Demographic Traits Variation in a Pyrenean Newt (Calotriton asper) among Lacustrine and Stream Populations

Demographic Traits Variation in a Pyrenean Newt (Calotriton asper) among Lacustrine and Stream Populations

Is the Pyrenean newt (<em>Calotriton asper</em>) a thermoconformer? Cloacal and water temperature in two different thermal periods in a Pre-Pyrenean stream population

Cartographie des proteines seriques de l'urodele pyreneen Euproctus asper (duges): Stabilite dans l'aire de repartition de l'espece

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