Relations entre la glycémie et l'activité saisonnière chez Vipera aspis L

Bonnet, Xavier; Naulleau, Guy

doi:10.1163/156853893x00499

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…For example, a very low glycaemia (<0.4 g/l) can be lethal in endotherm vertebrates (Chajek-Shaul et al ., 1990), whereas it may simply reflect non-pathological natural fluctuations in ectothermic reptiles, where variations are driven by ambient temperatures and reproductive effort (Bonnet and Naulleau, 1993). Consequently, although a very low glycaemia may well suggest serious health problems in an active female during vitellogenesis, it should be considered as normal in a resting and cold female sampled in late summer.…”

Section: Discussionmentioning

confidence: 99%

Sex-specific ecophysiological responses to environmental fluctuations of free-ranging Hermann's tortoises: implication for conservation

Sibeaux¹,

Michel²,

Bonnet³

et al. 2016

Conserv Physiol

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Section: Discussionmentioning

confidence: 99%

Sex-specific ecophysiological responses to environmental fluctuations of free-ranging Hermann's tortoises: implication for conservation

Sibeaux¹,

Michel²,

Bonnet³

et al. 2016

Conserv Physiol

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“…The study site is 33 ha in extent. The climate is a temperate oceanic one (see Bonnet and Naulleau [1993] for mean temperatures). It is a typical parkland habitat that has not been intensively managed for 15 yr.…”

Section: Animals and Study Sitementioning

confidence: 99%

“…In some meadows, oak and pine plantations have recently (1993)(1994)(1995) been established. The climate is a temperate oceanic one (see Bonnet and Naulleau [1993] for mean temperatures).…”

Section: Animals and Study Sitementioning

confidence: 99%

Reproduction in a Typical Capital Breeder: Costs, Currencies, and Complications in the Aspic Viper

Bonnet¹,

Lourdais²,

Shine³

et al. 2002

Ecology

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104

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Female aspic vipers (Vipera aspis) are ''capital breeders,'' and delay reproduction until they have amassed large energy reserves. Data from an eight-year markrecapture study on free-ranging vipers suggest that potential costs of reproduction were high for these animals, in terms of survival as well as growth and energy storage. Females that reproduced experienced higher mortality rates than nonreproductive females and, hence, exhibited a tendency toward semelparity, grew less, and devoted most of their energy stores to reproduction. Both the depletion of body reserves and the low survival of reproductive females translated into significant costs (decrements of lifetime reproductive success [LRS]). However, the cessation of growth during pregnancy had no detectable effect on LRS. Most females produced only a single litter during their lifetimes. A female's ''costs'' in energy terms were not negatively correlated with her future reproductive output, probably because female vipers vary considerably in the rate at which they can accumulate energy. This notion is supported by the observations that (1) females with higher initial body reserves expended more energy during reproduction, and (2) females that accumulated energy more rapidly after parturition were more likely to survive and to breed again. This kind of variation among females masks any underlying trade-off between current reproductive effort and probable future reproductive success. Despite this complication, a strong link between rates of survival and postreproductive mass recovery suggests that changes in body reserves govern reproductive effort in this species.

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“…In some meadows, oak and pine plantations have recently (1993–1995) been established. The climate is a temperate oceanic one (see Bonnet and Naulleau [1993] for mean temperatures).…”

Section: Methodsmentioning

confidence: 99%

Reproduction in a Typical Capital Breeder: Costs, Currencies, and Complications in the Aspic Viper

Bonnet

Lourdais

Shine

et al. 2002

Ecology

Self Cite

123

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Female aspic vipers (Vipera aspis) are “capital breeders,” and delay reproduction until they have amassed large energy reserves. Data from an eight‐year mark–recapture study on free‐ranging vipers suggest that potential costs of reproduction were high for these animals, in terms of survival as well as growth and energy storage. Females that reproduced experienced higher mortality rates than nonreproductive females and, hence, exhibited a tendency toward semelparity, grew less, and devoted most of their energy stores to reproduction. Both the depletion of body reserves and the low survival of reproductive females translated into significant costs (decrements of lifetime reproductive success [LRS]). However, the cessation of growth during pregnancy had no detectable effect on LRS. Most females produced only a single litter during their lifetimes. A female's “costs” in energy terms were not negatively correlated with her future reproductive output, probably because female vipers vary considerably in the rate at which they can accumulate energy. This notion is supported by the observations that (1) females with higher initial body reserves expended more energy during reproduction, and (2) females that accumulated energy more rapidly after parturition were more likely to survive and to breed again. This kind of variation among females masks any underlying trade‐off between current reproductive effort and probable future reproductive success. Despite this complication, a strong link between rates of survival and postreproductive mass recovery suggests that changes in body reserves govern reproductive effort in this species.

show abstract

Relations entre la glycémie et l'activité saisonnière chez Vipera aspis L

Cited by 6 publications

References 26 publications

Sex-specific ecophysiological responses to environmental fluctuations of free-ranging Hermann's tortoises: implication for conservation

Sex-specific ecophysiological responses to environmental fluctuations of free-ranging Hermann's tortoises: implication for conservation

Reproduction in a Typical Capital Breeder: Costs, Currencies, and Complications in the Aspic Viper

Reproduction in a Typical Capital Breeder: Costs, Currencies, and Complications in the Aspic Viper

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