A skeletochronological study of age, growth and longevity of Rana macrocnemis populations from four locations at different altitudes in Turkey

2011 ◽  
Vol 32 (1) ◽  
pp. 113-118 ◽  
Author(s):  
Emel Çakır ◽  
Ufuk Bülbül ◽  
Nurhayat Özdemir ◽  
Bilal Kutrup
Keyword(s):  
Life History ◽  
Age Structure ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Maximum Lifespan ◽  
Population Age Structure ◽  
Positive Correlation ◽  
Males And Females ◽  
Different Altitudes ◽  
Rana Macrocnemis

AbstractWe examined life-history traits such as population age structure, growth and longevity of Iranian Long-Legged frogs (Rana macrocnemis) from 4 different locations at different altitudes in Turkey by skeletochronology performed on the phalanges. The maximum lifespan was 5 years in Maçka (350 m a.s.l.), 6 years in Hıdırnebi (1430 m a.s.l.), 8 years in Sarıkamış (2276 m a.s.l.) and 10 years in Ovit (2850 m a.s.l.). Age at sexual maturity of both males and females was 2-3 years in the Maçka, Hıdırnebi and Sarıkamış populations, while 3-4 years for males and 3-5 years for females in the Ovit population. In all populations, males and females did not exhibit any differences in terms of mean age and SVL except for Sarıkamı¸s where the males were significantly larger than the females. A positive correlation was observed between age and SVL for both sexes in all populations except for the males of the Maçka population.

Life History Traits in a Population of Pelobates syriacus (Boettger, 1889) from Turkey

2020 ◽  
Vol 27 (4) ◽  
pp. 195-200
Author(s):  
Ufuk Bülbül ◽  
Halime Koç ◽  
Yasemin Odabaş ◽  
Ali İhsan Eroğlu ◽  
Muammer Kurnaz ◽  
...  
Keyword(s):  
Life History ◽  
Age Structure ◽  
Life History Traits ◽  
Spadefoot Toad ◽  
Males And Females

Age structure of the eastern spadefoot toad, Pelobates syriacus from the Kızılırmak Delta (Turkey) were assessed using phalangeal skeletochronology. Snout-vent length (SVL) ranged from 42.05 to 86.63 mm in males and 34.03 to 53.27 mm in females. Age of adults ranged from 2 to 8 years in males and 3 to 5 years in females. For both sexes, SVL was significantly correlated with age. Males and females of the toads reached maturity at 2 years of age.

scholarly journals Epigenetic predictors of maximum lifespan and other life history traits in mammals

2021 ◽  
Author(s):  
Caesar Z. Li ◽  
Amin Haghani ◽  
Todd R. Robeck ◽  
Diego Villar ◽  
Ake T. Lu ◽  
...  
Keyword(s):  
Life History ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Growth Hormone Receptor ◽  
Cytosine Methylation ◽  
Mammalian Species ◽  
Maximum Lifespan ◽  
Transcriptional Regulatory ◽  
Extended Lifespan ◽  
Methylation Patterns

Maximum lifespan of a species is the oldest that individuals can survive, reflecting the genetic limit of longevity in an ideal environment. Here we report methylation-based models that accurately predict maximum lifespan (r=0.89), gestational time (r=0.96), and age at sexual maturity (r=0.87), using cytosine methylation patterns collected from over 12,000 samples derived from 192 mammalian species. Our epigenetic maximum lifespan predictor corroborated the extended lifespan in growth hormone receptor knockout mice and rapamycin treated mice. Across dog breeds, epigenetic maximum lifespan correlates positively with breed lifespan but negatively with breed size. Lifespan-related cytosines are located in transcriptional regulatory regions, such as bivalent chromatin promoters and polycomb-repressed regions, which were hypomethylated in long-lived species. The epigenetic estimators of maximum lifespan and other life history traits will be useful for characterizing understudied species and for identifying interventions that extend lifespan.

scholarly journals Age structure and body size of the endangered species Darevskia bendimahiensis (Schmidtler, Eiselt & Darevsky, 1994) from eastern Turkey (Squamata, Sauria, Lacertidae)

Herpetozoa ◽  
2019 ◽  
Vol 32 ◽  
pp. 159-163
Author(s):  
Elif Yıldırım ◽  
Yusuf Kumlutaş ◽  
Kamil Candan ◽  
Çetin Ilgaz
Keyword(s):  
Life History ◽  
Body Size ◽  
Endangered Species ◽  
Age Structure ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Eastern Turkey ◽  
The Future ◽  
The Mean ◽  
Spearman’S Correlation

The life-history traits of the parthenogenetic lizard Darevskiabendimahiensis were studied by skeletochronology in a population inhabiting highlands in Çaldıran, Van, Turkey. Endosteal resorption was observed in 18 specimens (55%). The mean age was 4.91 ± 0.19 SD years. The mean snout-vent length (SVL) was 51.11 ± 1.15 SD mm. The age at sexual maturity was estimated as 3 years. Longevity was 7 years. Snout-vent length and age were positively correlated (Spearman’s correlation; r = 0.797, P = 0.000). The aim of this study is to contribute to the future conservation activities for this endangered species.

Sexual dimorphism and age structure of the Montseny newt (Calotriton arnoldi)

2015 ◽  
Vol 36 (3) ◽  
pp. 245-252 ◽  
Author(s):  
Fèlix Amat ◽  
Neus Oromí ◽  
Delfí Sanuy ◽  
Salvador Carranza
Keyword(s):  
Life History ◽  
Sexual Dimorphism ◽  
Age Structure ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Geographic Scale ◽  
Total Body ◽  
Similar Body ◽  
Two Populations ◽  
Small Geographic Scale

Patterns of sexual dimorphism and age structure were investigated in two populations of the newtCalotriton arnoldi, endemic of the Montseny Massif (NE of the Iberian Peninsula). In contrast to the Pyrenean newt (Calotriton asper) sexual dimorphism in the Montseny brook newt is characterized by slightly larger females (60.3 ± 0.3 mm; maximum: 68 mm) than males (59.5 ± 0.2 mm; maximum: 64 mm) and more similar body shape between sexes. Both populations and sexes mature at the same age (3 years), show the same age structure and achieve similar longevity (8-9 years). Comparing our results with the framework of the variation of life-history traits inCalotriton, the Montseny newts exhibit fast sexual maturity and short longevity. Curiously, we have found a lack of covariation between age at sexual maturity, longevity and total body size in the populations ofCalotritonspecies. Only in males, age at sexual maturity seems to be affected by altitude, but in an unexpected way: sexual maturation is delayed in populations at low altitudes. Moreover, the age at sexual maturity does not differs between the populations where immatures are terrestrial vs. those where they remain aquatic. Our results suggest that life-history traits inCalotritonnewts could be determined by selective factors that play their role at small geographic scale.

Demographic life history traits in a population of a critically endangered species, Darevskia dryada (Darevsky & Tuniyev, 1997)

2018 ◽  
Vol 68 (1) ◽  
pp. 27-37 ◽  
Author(s):  
Abdullah Altunışık ◽  
Halit Eksilmez
Keyword(s):  
Endangered Species ◽  
Life Span ◽  
Age Structure ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Critically Endangered ◽  
Critically Endangered Species ◽  
Reproductive Life ◽  
Reproductive Life Span ◽  
Males And Females

AbstractKnowing the age structure of endangered species is important in order to contribute to future conservation studies for such species. In this context, we investigated age structure, age at sexual maturity, potential reproductive lifespan and longevity in a population of the Charnali lizard,Darevskia dryada, an endangered species from Turkey. The results show that the Charnali lizard has a longer life span than other lizards of the genusDarevskiathat live in the same region. We estimated that these lizards attain their sexual maturity at the age of one or two years and the potential reproductive life span for males and females is six and five years, respectively. As in many other lizards, the Charnali lizard exhibited a low-level male-biased sexual dimorphism in terms of increased size. We believe that this study, in which prior information related to the Charnali lizard is shared, will contribute to future conservation activities for this critically endangered species.

Age Structure and Life Expectancy in a Stellagama stellio (Linnaeus, 1758) Population from Kütahya, Turkey

2021 ◽  
Vol 28 (6) ◽  
pp. 327-332
Author(s):  
Muge Gidis ◽  
Eyup Baskale
Keyword(s):  
Life History ◽  
Standard Deviation ◽  
Sexual Dimorphism ◽  
Life Expectancy ◽  
Age Structure ◽  
Life History Traits ◽  
Age At Maturity ◽  
Males And Females ◽  
The Mean ◽  
The Difference

The life history traits of the rough-tailed agama, Stellagama stellio (Linnaeus, 1758) in a population from Kütahya, Turkey were described by the skeletochronological method. From a total of 54 individuals, the mean ages ± standard deviation (SD) of males and females were calculated as 5.03 ± 2.076 years and 4.79 ± 1.584 years, respectively, and age distributions were not significantly different between sexes. The age at maturity was 2 years for both sexes. The longevity of females was 8 years, whereas for males it was 9 years. Mean snout-vent length (SVL) ± SD was 101.7 ± 9.6 mm in females and 104.9 ± 14.4 mm in males and did not significantly differ between the two sexes. We examined the sexual dimorphism of S. stellio in relation to the difference in population age structure between the sexes using the skeletochronological method. Male individuals were slightly larger than female individuals at the same age, but this difference was not statistically significant. We also estimated the maximum ages for S. stellio, which agree with other populations in Turkey.

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

Diversity ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 471
Author(s):  
Sebastià Camarasa ◽  
Neus Oromi ◽  
Delfí Sanuy ◽  
Fèlix Amat
Keyword(s):  
Life History ◽  
Body Size ◽  
Age Structure ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Size Structure ◽  
Maximum Size ◽  
Sexually Dimorphic ◽  
Age At Maturity ◽  
Demographic Traits

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.

Body size and age structure of the endangered Clark’s lizard (Darevskia clarkorum) populations from two different altitudes in Turkey

2016 ◽  
Vol 37 (4) ◽  
pp. 450-456 ◽  
Author(s):  
Ufuk Bülbül ◽  
Muammer Kurnaz ◽  
Ali İhsan Eroğlu ◽  
Halime Koç ◽  
Bilal Kutrup
Keyword(s):  
Body Size ◽  
Age Structure ◽  
Sexual Maturity ◽  
Age At Maturity ◽  
Maximum Life Span ◽  
Breeding Populations ◽  
Size And Age Structure ◽  
Males And Females ◽  
The Mean ◽  
Different Altitudes

We investigated age structure, body size and longevity in two breeding populations ofDarevskia clarkoruminhabiting altitudes ranging from 450 m a.s.l. (Kamilet) to 2250 m a.s.l. (Başyayla) in Turkey by skeletochronology performed on the phalanges. The mean age was found to be 6 years in the Kamilet population and 7 years in the Başyayla population. The maximum life span was 10 years in the lowland population while it was 12 years in the highland population. Age at sexual maturity of both males and females was 1-2 years in the lowland population while it was 2-3 for both sexes in the highland population. Both age and SVL of specimens from the Kamilet population were significantly different between the sexes while age and SVL did not differ significantly between the sexes in Başyayla population. As a conclusion, we observed that the mean age, longevity and age at maturity were increased by altitude while there was a decrease based on the mean SVL in the highland population ofD. clarkorum. Our data on body size, longevity and age at sexual maturity may contribute to conservation efforts for this endangered species.

scholarly journals Subterranean Invasion by Gapped Ringed Crayfish: Effectiveness of a Removal Effort and Barrier Installation

Diversity ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 3 ◽  
Author(s):  
Joshua Mouser ◽  
David Ashley ◽  
Tom Aley ◽  
Shannon Brewer
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Major Threat ◽  
Males And Females ◽  
Native Crayfish ◽  
Age Estimates

Non-native crayfish invasion is a major threat to many stream fauna; however, invasions in subterranean habitats are rarely documented. Our study objectives were to examine demographics and morphological and life-history traits of a gapped ringed crayfish Faxonius neglectus chaenodactylus population that invaded Tumbling Creek Cave and determine the effects of removal on the population. Crayfish were found throughout the cave though fewer individuals were observed upstream of an installed weir. Fecund females were collected in nearly all months, but were prevalent during spring (February–June). Males and females were of similar sizes. Males had larger chelae and chelae that were regenerated slightly more often than females. Removal of >4000 crayfish since 2011 resulted in reduced abundances, but the population persisted. Age estimates from counting bands on gastric mills indicated crayfish within the cave lived longer than populations in nearby Big Creek (6 vs. 4 years). Recent efforts to prevent upstream cave migrations included a barrier installation and since installation, few crayfish have been located upstream. We show that exploitation of new environments may lead to trait changes (i.e., reproduction and longevity). We also demonstrate that barriers reduce the spread of invasion at a comparable cost to removal. We hypothesize that increased reservoir elevation inundates springs hydrologically connected to the cave and this may be the invasion source.

scholarly journals Life history traits of the temperate mini-maximalist Idiosepius notoides, (Cephalopoda: Sepioidea)

2003 ◽  
Vol 83 (6) ◽  
pp. 1297-1300 ◽  
Author(s):  
Sean R. Tracey ◽  
Mike A. Steer ◽  
Gretta T. Pecl
Keyword(s):  
Life History ◽  
Growth Rates ◽  
Sexual Maturity ◽  
Life History Traits ◽  
Mantle Length ◽  
Power Curve ◽  
Short Life ◽  
Gender Dimorphism ◽  
Cephalopod Species

Age, growth and maturation of the temperate ‘mini-maximalist’ Idiosepius notoides from Tasmania is described and compared with those of its tropical congener Idiosepius pygmaeus. Using statolith increment analysis, growth of I. notoides was best described by a power curve with a maximum age of 115 days recorded. Males have a shorter lifespan than females, however growth rates were similar between the sexes. Idiosepius notoides grows to a larger size than its tropical counterpart. Onset of maturity in I. notoides occurred at an age of approximately 68 days for males and 88 days for females compared to 45–60 days for I. pygmaeus. Size at onset of sexual maturity was analogous between the two species, with males mature at approximately 6·5 mm mantle length (ML) and females at 14·0 mm ML. Idiosepius notoides, like I. pygmaeus, is a small short-lived sepioid with significant gender dimorphism and the capacity to spawn multiple times throughout its short life. This research supports the concept of similar cephalopod species living longer and growing larger in cooler environments.

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