Growth, maturation and survival of frogs Rana temporaria L.

Gibbons, Maria M.; McCarthy, T. K.

doi:10.1111/j.1600-0587.1984.tb01143.x

Cited by 51 publications

(52 citation statements)

References 12 publications

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“…In anuran species, Monnet & Cherry (2002) found that the sexual dimorphism in body size indicated different survival rates in males and females. A difference between male and female survival was found in species of the genus Desmognathus (Tilley 1980), in the Columbian spotted frog Rana lut ei ven tris (Turner 1960) and the common frog Rana temporaria (Gibbons & McCarthy 1984). However, our results based on local survival indicated that the average lifespan was similar for both sexes, confirming previous re sults from Pinya & Pérez-Mellado (2013).…”

Section: Discussionsupporting

confidence: 87%

Population model of an endangered amphibian: implications for conservation management

Pinya¹,

Tavecchia²,

Pérez-Mellado³

2017

Endang. Species. Res.

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Amphibian populations are declining worldwide, but for many taxa, robust estimates of demographic parameters to assess population state or trends are scarce or absent. We provide robust estimates of adult apparent survival of the endemic Mallorcan midwife toad Alytes muletensis using individual capture-recapture data collected over 4 yr in a 60 m 2 cistern. Moreover, we combined the vital rates into a stage-structured population model to estimate the ex pected longterm growth rate of the population. Apparent survival estimates of males and females were similar (0.737 ± 0.042 and 0.726 ± 0.045, respectively) indicating that the egg-carrying behavior of males, typical of this species, does not reduce its survival probability. We found evidence of a low local survival of juveniles compared with adults, most likely due to permanent dispersal. Adult population size estimation provided higher tadpole:adult ratios than previously reported for this endangered species, suggesting an overestimation of the previous adult population size. Model projections suggested a stable population, since λ, the expected asymptotic growth rate of the population, was close to 1.00.

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Section: Discussionsupporting

confidence: 87%

Population model of an endangered amphibian: implications for conservation management

Pinya¹,

Tavecchia²,

Pérez-Mellado³

2017

Endang. Species. Res.

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“…However, in a few species positive correlations between body size and age are determined either only for males (B. pardalis, Cherry & Francillon 1992) or only for females (R. temporaria, Gibbons & McCarthy 1984).…”

Section: Discussionmentioning

confidence: 99%

Age structure and body size of two populations of the rice frogRana limnocharisfrom different altitudes

Liao

Lü

Shen

et al. 2011

Italian Journal of Zoology

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Identifying the patterns of body size and age in relation to altitudes may help us to understand the evolution of life history of organisms. With this view, we compared the demographic traits of a subtropical frog, Rana limnocharis, between populations from southwestern China located at two altitudes (310 and 800 m) with distinct mean annual temperature (17.1°C and 15.2°C). Overall, frogs from the higher altitude tended to be significantly larger in body size. Within each population, adult females were markedly larger and older than males. However, average age between high altitude and low altitude was not strongly different within each sex. There were significant relationships between age and body size within each sex in both altitudes. ANCOVAs revealed that body size within sexes differed significantly between altitudes when the effect of age was removed. Our findings suggest that factors other than age may contribute to differences in body size between altitudes, such as air temperature and breeding season length.

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“…Another process that may result in a malebiased adult sex ratio is that female anurans often mature later than males (Berven, 1990 (R. sylvatica); Gibbons and McCarthy, 1984;Reading, 1991 (B. bufo) ;Miaud, Guyétant and Elmberg, 1999 (R. temporaria)). …”

Section: Introductionmentioning

confidence: 99%

Sex ratio of breeding Common toads (Bufo bufo) – influence of survival and skipped breeding

Loman

Madsen

2010

Amphib Reptilia

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Anuran sex ratio at breeding sites is typically male biased. Such sex ratios may be due to poor female survival, to females not breeding as frequently as males and/or to males becoming sexually mature earlier than females. In the present study, the first two factors are analyzed in a common toad (Bufo bufo) population in southern Sweden. Toads were captured, marked and recaptured at the breeding site during 5 years. Within season capture patterns were analyzed using the Jolly-Seber model and among-year captures using the Closed robust design model. Population estimates of males and females yielded an among year variation in breeding population sex ratio, ranging from 16% to 34% females. On average, 41% (proportion adult alive but not breeding) of the females skipped breeding seasons, whereas the corresponding estimate for males was less than 5%. Yearly survival averaged 42% for adult female and 63% for adult male toads. First year adult males and females had a lower survival rate than older toads. Our results demonstrate that both a female biased mortality rate and a higher proportion of skipped breeding in females contribute to the observed male biased sex ratio. However, a deterministic model suggests other factors may also be involved to obtain this degree of male biased sex ratio, the most likely being that females mature at a later age than male toads. © 2010 Brill Academic Publishers. Abstract. Anuran sex ratio at breeding sites is typically male biased. Such sex ratios may be due to poor female survival, to females not breeding as frequently as males and/or to males becoming sexually mature earlier than females. In the present study, the first two factors are analyzed in a common toad (Bufo bufo) population in southern Sweden. Toads were captured, marked and recaptured at the breeding site during 5 years. Within season capture patterns were analyzed using the Jolly-Seber model and among-year captures using the Closed robust design model. Population estimates of males and females yielded an among year variation in breeding population sex ratio, ranging from 16% to 34% females. On average, 41% (proportion adult alive but not breeding) of the females skipped breeding seasons, whereas the corresponding estimate for males was less than 5%. Yearly survival averaged 42% for adult female and 63% for adult male toads. First year adult males and females had a lower survival rate than older toads. Our results demonstrate that both a female biased mortality rate and a higher proportion of skipped breeding in females contribute to the observed male biased sex ratio. However, a deterministic model suggests other factors may also be involved to obtain this degree of male biased sex ratio, the most likely being that females mature at a later age than male toads.

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Growth, maturation and survival of frogs Rana temporaria L.

Cited by 51 publications

References 12 publications

Population model of an endangered amphibian: implications for conservation management

Population model of an endangered amphibian: implications for conservation management

Age structure and body size of two populations of the rice frogRana limnocharisfrom different altitudes

Sex ratio of breeding Common toads (Bufo bufo) – influence of survival and skipped breeding

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