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Vučić T, Ivanović A, Ajduković M, Bajler N, Cvijanović M. The Reproductive Success of Triturus ivanbureschi × T. macedonicus F1 Hybrid Females (Amphibia: Salamandridae). Animals (Basel) 2022; 12:ani12040443. [PMID: 35203151 PMCID: PMC8868055 DOI: 10.3390/ani12040443] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 11/28/2022] Open
Abstract
Simple Summary Two moderately related large-bodied newt species endemic to the Balkan Peninsula, the Balkan crested newt (Triturus ivanbureschi) and the Macedonian crested newt (T. macedonicus), coexist and hybridize in central Serbia. Many generations of mutual hybrid crossings and backcrossings with parental species shaped the genetic composition of hybrid populations. Natural populations have admixed nuclear DNA (nuDNA) of parental species and T. ivanbureschi mitochondrial DNA (mtDNA), which is usually maternally inherited. The mechanisms that direct gene flow and shape the first generations of hybrids could explain the formation of hybrid zones and their maintenance in nature. We followed and compared life history traits related to reproduction of the first generation of reciprocal hybrids obtained by experimental crossing. Our results suggested that possible incompatibilities between mitochondrial and nuclear genomes, which could lead to the exclusion of T. macedonicus mtDNA in natural populations, most likely act at later stages of development or subsequent hybrid generations. Results from this study add to the growing knowledge of Triturus hybrid biology and ecology, which is the baseline for conservation programs necessary to protect these highly endangered amphibians. Abstract Two large-bodied newt species, Triturus ivanbureschi and T. macedonicus, hybridize in nature across the Balkan Peninsula. Consequences of hybridization upon secondary contact of two species include species displacement and asymmetrical introgression of T. ivanbureschi mtDNA. We set an experimental reciprocal cross of parental species and obtained two genotypes of F1 hybrids (with T. ivanbureschi or T. macedonicus mtDNA). When hybrids attained sexual maturity, they were engaged in mutual crossings and backcrossing with parental species. We followed reproductive traits over two successive years. Our main aim was to explore the reproductive success of F1 females carrying different parental mtDNA. Additionally, we tested for differences in reproductive success within female genotypes depending on the crossing with various male genotypes (hybrids or parental species). Both female genotypes had similar oviposition periods, number of laid eggs and hatched larvae but different body and egg sizes. Overall reproductive success (percentage of egg-laying females and viability of embryos) was similar for both genotypes. The type of crossing led to some differences in reproductive success within female genotypes. The obtained results suggest that processes that led to exclusion of T. macedonicus mtDNA in natural populations may be related to the survival at postembryonic stages of F2 generation or reproductive barriers that emerged in subsequent hybrid generations.
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Affiliation(s)
- Tijana Vučić
- Faculty of Biology, Institute of Zoology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia; (A.I.); (N.B.)
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000 Belgrade, Serbia;
- Correspondence: (T.V.); (M.C.)
| | - Ana Ivanović
- Faculty of Biology, Institute of Zoology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia; (A.I.); (N.B.)
| | - Maja Ajduković
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000 Belgrade, Serbia;
| | - Nikola Bajler
- Faculty of Biology, Institute of Zoology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia; (A.I.); (N.B.)
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000 Belgrade, Serbia;
| | - Milena Cvijanović
- Department of Evolutionary Biology, Institute for Biological Research “Siniša Stanković”, National Institute of the Republic of Serbia, University of Belgrade, Bulevar Despota Stefana 142, 11000 Belgrade, Serbia;
- Correspondence: (T.V.); (M.C.)
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Cogălniceanu D, Stănescu F, Arntzen JW. Testing the hybrid superiority hypothesis in crested and marbled newts. J ZOOL SYST EVOL RES 2019. [DOI: 10.1111/jzs.12322] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Dan Cogălniceanu
- Faculty of Natural and Agricultural Sciences Ovidius University Constanţa Romania
- Chelonia Romania Bucharest Romania
| | - Florina Stănescu
- Faculty of Natural and Agricultural Sciences Ovidius University Constanţa Romania
- Chelonia Romania Bucharest Romania
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Arntzen JW, Üzüm N, Ajduković MD, Ivanović A, Wielstra B. Absence of heterosis in hybrid crested newts. PeerJ 2018; 6:e5317. [PMID: 30065885 PMCID: PMC6063215 DOI: 10.7717/peerj.5317] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Accepted: 07/04/2018] [Indexed: 11/27/2022] Open
Abstract
Relationships between phylogenetic relatedness, hybrid zone spatial structure, the amount of interspecific gene flow and population demography were investigated, with the newt genus Triturus as a model system. In earlier work, a bimodal hybrid zone of two distantly related species combined low interspecific gene flow with hybrid sterility and heterosis was documented. Apart from that, a suite of unimodal hybrid zones in closely related Triturus showed more or less extensive introgressive hybridization with no evidence for heterosis. We here report on population demography and interspecific gene flow in two Triturus species (T. macedonicus and T. ivanbureschi in Serbia). These are two that are moderately related, engage in a heterogeneous uni-/bimodal hybrid zone and hence represent an intermediate situation. This study used 13 diagnostic nuclear genetic markers in a population at the species contact zone. This showed that all individuals were hybrids, with no parentals detected. Age, size and longevity and the estimated growth curves are not exceeding that of the parental species, so that we conclude the absence of heterosis in T. macedonicus-T. ivanbureschi. Observations across the genus support the hypothesis that fertile hybrids allocate resources to reproduction and infertile hybrids allocate resources to growth. Several Triturus species hybrid zones not yet studied allow the testing of this hypothesis.
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Affiliation(s)
| | - Nazan Üzüm
- Department of Biology, Faculty of Arts and Sciences, Adnan Menderes University, Aydin, Turkey
| | - Maja D. Ajduković
- Institute for Biological Research “Siniša Stanković”, University of Belgrade, Belgrade, Serbia
| | - Ana Ivanović
- Naturalis Biodiversity Center, Leiden, The Netherlands
- Institute of Zoology, Faculty of Biology, University of Belgrade, Belgrade, Serbia
| | - Ben Wielstra
- Naturalis Biodiversity Center, Leiden, The Netherlands
- Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, USA
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Palau Daval N, Gardette V, Joly P. Age, courtship and senescence: sexual ornaments are larger in older great crested newts. J Zool (1987) 2018. [DOI: 10.1111/jzo.12579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- N. Palau Daval
- UMR 5023 LEHNA Lyon1, CNRS, ENTPE Université de Lyon Villeurbanne France
| | - V. Gardette
- UMR 5023 LEHNA Lyon1, CNRS, ENTPE Université de Lyon Villeurbanne France
| | - P. Joly
- UMR 5023 LEHNA Lyon1, CNRS, ENTPE Université de Lyon Villeurbanne France
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Mori E, Menchetti M, Cantini M, Bruni G, Santini G, Bertolino S. Twenty years’ monitoring of a population of Italian crested newts Triturus carnifex: strong site fidelity and shifting population structure in response to restoration. ETHOL ECOL EVOL 2016. [DOI: 10.1080/03949370.2016.1236040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Emiliano Mori
- Dipartimento di Scienze della Vita, Università di Siena, Via P.A. Mattioli 4, 53100 Siena, Italy
| | - Mattia Menchetti
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano 6, 50019 Sesto Fiorentino (Firenze), Italy
| | - Matteo Cantini
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano 6, 50019 Sesto Fiorentino (Firenze), Italy
| | - Giacomo Bruni
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano 6, 50019 Sesto Fiorentino (Firenze), Italy
| | - Giacomo Santini
- Dipartimento di Biologia, Università di Firenze, Via Madonna del Piano 6, 50019 Sesto Fiorentino (Firenze), Italy
| | - Sandro Bertolino
- DISAFA, Università di Torino, Largo Paolo Braccini 2, 10095 Grugliasco (Torino), Italy
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Urošević A, Slijepčević MD, Arntzen JW, Ivanović A. Vertebral shape and body elongation in Triturus newts. ZOOLOGY 2016; 119:439-446. [DOI: 10.1016/j.zool.2016.05.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 02/18/2016] [Accepted: 05/18/2016] [Indexed: 12/29/2022]
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Yakın BY, Çiçek K, Koyun M, Gürkan M, Hayretdağ S, Tok CV. A skeletochronological analysis of a population of the Anatolia Newt, Neurergus strauchii (Steindachner, 1887) (Caudata: Salamandridae), in Eastern Anatolia, Turkey. ZOOLOGY IN THE MIDDLE EAST 2015. [DOI: 10.1080/09397140.2015.1101926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Batuhan Yaman Yakın
- Biology Department, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University, Terzioğlu Campus, Çanakkale, Turkey
| | - Kerim Çiçek
- Section of Zoology, Department of Biology, Faculty of Science, Ege University, Izmir, Turkey
| | - Mustafa Koyun
- Biology Department, Faculty of Arts and Sciences, Bingöl University, Bingöl, Turkey
| | - Mert Gürkan
- Biology Department, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University, Terzioğlu Campus, Çanakkale, Turkey
| | - Sibel Hayretdağ
- Biology Department, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University, Terzioğlu Campus, Çanakkale, Turkey
| | - Cemal Varol Tok
- Biology Department, Faculty of Arts and Sciences, Çanakkale Onsekiz Mart University, Terzioğlu Campus, Çanakkale, Turkey
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Reinhard S, Renner S, Kupfer A. Sexual dimorphism and age of Mediterranean salamanders. ZOOLOGY 2014; 118:19-26. [PMID: 25497699 DOI: 10.1016/j.zool.2014.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 08/07/2014] [Accepted: 08/18/2014] [Indexed: 11/16/2022]
Abstract
We analysed sexual size dimorphism (SSD) for two Mediterranean species of the "true" salamander clade possessing distinct life histories (Salamandra algira and Mertensiella caucasica) and equilibrated the morphometric approach to individual age by using skeletochronology. For species that have a short breeding season and live at high altitudes, such as Mediterranean amphibians, the fecundity advantage hypothesis predicts female-biased SSD to maximise reproductive success. Our results showed no SSD in either species; however, morphometric data indicated a male-biased dimorphism in limb (arm and leg) dimensions in both species when compared to body size. Limb dimorphisms are likely related to the particular mating system, which involves an amplexus during spermatophore transfer. Arm length appeared sexually dimorphic during ontogeny both in viviparous S. algira and oviparous M. caucasica. A review on SSD indicated monomorphy of body size as a common lineage-specific pattern among the "true" salamander clade, but also the common presence of other traits such as sexually dimorphic limb proportions.
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Affiliation(s)
- Sandy Reinhard
- Institute of Systematic Zoology and Evolutionary Biology with Phyletic Museum, Friedrich Schiller-University Jena, Erbertstraße 1, D-07743 Jena, Germany
| | - Sandra Renner
- Institute of Systematic Zoology and Evolutionary Biology with Phyletic Museum, Friedrich Schiller-University Jena, Erbertstraße 1, D-07743 Jena, Germany
| | - Alexander Kupfer
- Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam, Germany; Department of Zoology, State Museum of Natural History Stuttgart, Rosenstein 1, D-70191 Stuttgart, Germany.
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Vukov TD, Cvijanović M, Wielstra B, Kalezić ML. The Roles of Phylogeny and Climate in Shaping Variation in Life-History Traits of the Newt GenusTriturus(Caudata, Salamandridae). ANN ZOOL FENN 2014. [DOI: 10.5735/086.051.0505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Üzüm N, Ivanović A, Gümüş Ç, Avcı A, Olgun K. Divergence in size, but not in shape: variation in skull size and shape withinOmmatotritonnewts. ACTA ZOOL-STOCKHOLM 2014. [DOI: 10.1111/azo.12092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nazan Üzüm
- Biology Department; Faculty of Arts and Sciences; University of Adnan Menderes; Aydın 09010 Turkey
| | - Ana Ivanović
- Faculty of Biology; Institute for Zoology; University of Belgrade; Studentski trg 16 Belgrade 11000 Serbia
| | - Çiçek Gümüş
- Biology Department; Faculty of Arts and Sciences; University of Adnan Menderes; Aydın 09010 Turkey
| | - Aziz Avcı
- Biology Department; Faculty of Arts and Sciences; University of Adnan Menderes; Aydın 09010 Turkey
| | - Kurtuluş Olgun
- Biology Department; Faculty of Arts and Sciences; University of Adnan Menderes; Aydın 09010 Turkey
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Ivanović A, Arntzen JW. Evolution of skull and body shape inTriturusnewts reconstructed from three-dimensional morphometric data and phylogeny. Biol J Linn Soc Lond 2014. [DOI: 10.1111/bij.12314] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Ana Ivanović
- Faculty of Biology; Institute for Zoology; University of Belgrade; Studentski trg 16 11000 Belgrade Serbia
- Naturalis Biodiversity Center; PO Box 9517 2300 RA Leiden The Netherlands
| | - Jan W. Arntzen
- Naturalis Biodiversity Center; PO Box 9517 2300 RA Leiden The Netherlands
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12
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Angelini C, Sotgiu G, Tessa G, Bielby J, Doglio S, Favelli M, Garner TWJ, Gazzaniga E, Giacoma C, Bovero S. Environmentally determined juvenile growth rates dictate the degree of sexual size dimorphism in the Sardinian brook newt. Evol Ecol 2014. [DOI: 10.1007/s10682-014-9717-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Pinya S, Pérez-Mellado V. Ageing and growth of the endangered midwife toad Alytes muletensis. ENDANGER SPECIES RES 2013. [DOI: 10.3354/esr00551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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14
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Ivanović A, Üzüm N, Wielstra B, Olgun K, Litvinchuk SN, Kalezić ML, Arntzen JW. Is mitochondrial DNA divergence of Near Eastern crested newts (Triturus karelinii group) reflected by differentiation of skull shape? ZOOL ANZ 2013. [DOI: 10.1016/j.jcz.2012.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Affiliation(s)
- Sebastián A. Pardo
- Earth to Ocean Research Group; Department of Biological Sciences; Simon Fraser University; 8888 University Drive; Burnaby; V5A 1S6; BC; Canada
| | - Andrew B. Cooper
- School of Resource & Environmental Management; Simon Fraser University; 8888 University Drive; Burnaby; V5A 1S6; BC; Canada
| | - Nicholas K. Dulvy
- Earth to Ocean Research Group; Department of Biological Sciences; Simon Fraser University; 8888 University Drive; Burnaby; V5A 1S6; BC; Canada
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Age and body size of Salamandrella keyserlingii (Caudata: Hynobiidae): a difference in altitudes, latitudes, and temperatures. ORG DIVERS EVOL 2012. [DOI: 10.1007/s13127-012-0091-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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17
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HEARD GEOFFREYW, SCROGGIE MICHAELP, MALONE BRIANS. The life history and decline of the threatened Australian frog, Litoria raniformis. AUSTRAL ECOL 2011. [DOI: 10.1111/j.1442-9993.2011.02275.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Growth, size and age at maturity of the agile frog (Rana dalmatina) in an Iberian Peninsula population. ZOOLOGY 2011; 114:150-4. [PMID: 21658922 DOI: 10.1016/j.zool.2010.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 09/28/2010] [Accepted: 11/30/2010] [Indexed: 11/21/2022]
Abstract
The mean age of a population of agile frogs (Rana dalmatina) from the Iberian Peninsula was estimated using mark and recapture and skeletochronology. Life-history parameters, including growth rate, body length, age and size at maturity, sexual dimorphism and longevity, were studied. The regression between age and snout-vent length (SVL) was highly significant in both sexes. Males reached sexual maturity at two years of age, although sometimes they can reach it at only one year of age. The average SVL at maturity was 51.75 mm (standard error (SE)=0.71; n=45). Females reached sexual maturity at two years of age with an average SVL of 62.14 mm (SE=2.20; n=14). A subset of the female population reached sexual maturity at three years of age. Growth was rapid until sexual maturity was reached. There was an overlap of SVL between different age classes. Growth was continuous, fulfilling the conditions of Von Bertalanffy's model. The growth coefficient (K) was 0.840 in males and 0.625 in females. The maximum SVL was greater in females (73.00 mm) than in males (59.50mm). Sexual dimorphism was significantly biased towards females in all age classes. The maximum longevity observed was 6 years in females and 8 years in males. Management strategies for agile frogs should take into account factors such as these life-history characteristics.
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Age, Body Size, and Sexual Dimorphism in Size and Shape in Salamandrella keyserlingii (Caudata: Hynobiidae). Evol Biol 2010. [DOI: 10.1007/s11692-010-9080-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Furtula M, Todorović B, Simić V, Ivanović A. Interspecific differences in early life‐history traits in crested newts (Triturus cristatussuperspecies, Caudata, Salamandridae) from the Balkan Peninsula. J NAT HIST 2009. [DOI: 10.1080/00222930802585794] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Growth-rate in Free-roaming Salamanders Salamandra infraimmaculata: A Long-term Study. CURRENT HERPETOLOGY 2008. [DOI: 10.3105/1881-1019-27.2.61] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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SOTIROPOULOS K, LEGAKIS A, POLYMENI RM. Patterns of morphometric variation in the alpine newt (Mesotriton alpestris) at the southern limit of its distribution: environmental correlates. Integr Zool 2008; 3:123-33. [DOI: 10.1111/j.1749-4877.2008.00074.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Ontogeny of skull size and shape changes within a framework of biphasic lifestyle: a case study in six Triturus species (Amphibia, Salamandridae). ZOOMORPHOLOGY 2007. [DOI: 10.1007/s00435-007-0037-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Sex‐related growth patterns in a caecilian amphibian (genus
Ichthyophis
): evidence from laboratory data. J Zool (1987) 2006. [DOI: 10.1017/s0952836903004515] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Miaud C, Guillaume O. VARIATION IN AGE, BODY SIZE AND GROWTH AMONG SURFACE AND CAVE-DWELLING POPULATIONS OF THE PYRENEAN NEWT, EUPROCTUS ASPER (AMPHIBIA; URODELA). HERPETOLOGICA 2005. [DOI: 10.1655/04-29.1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Jakob C, Miaud C, Crivelli AJ, Veith M. How to cope with periods of drought? Age at maturity, longevity, and growth of marbled newts (Triturus marmoratus) in Mediterranean temporary ponds. CAN J ZOOL 2003. [DOI: 10.1139/z03-164] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We studied age at maturity, longevity, and growth in a marbled newt (Triturus marmoratus) population in southwestern France. Parameters of the life cycle such as date of migration, reproductive period, and terrestrial activity were documented for three neighbouring temporary ponds. This Mediterranean marbled newt population was characterized by aestivation and hibernation periods, a prolonged aquatic phase in adults, and a presence of juveniles in water. Aestivation and hibernation lead to distinct growth periods as determined by skeletochronology. Minimum age at maturity was 2 and 3 years, whereas maximum age observed was 8 and 9 years in males and females, respectively. A higher growth rate and a lower survival rate were found in this Mediterranean population compared with other populations exposed to variable environmental conditions in western Europe.
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Cogalniceanu D, Miaud C. Population age structure and growth in four syntopic amphibian species inhabiting a large river floodplain. CAN J ZOOL 2003. [DOI: 10.1139/z03-086] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
River floodplains are disturbance-dominated landscapes where floods are major regulators of both aquatic and nearby terrestrial communities. Amphibians are common inhabitants of floodplains and their life cycle depends on both aquatic and terrestrial habitats. We focused on how different syntopic species of amphibians reacted to the environmental conditions of a large river floodplain. We examined life-history traits such as population age structure and growth in small- and large-bodied species of anurans and urodeles in the lower Danube River floodplain in Romania. Two newt species, Triturus vulgaris (small-bodied) and Triturus dobrogicus (large-bodied), and two anuran taxa, Bombina bombina (small-bodied) and the Rana esculenta complex (large-bodied), were included in the study. The ages of individuals estimated by skeletochronology varied from 3 to 56 years for T. vulgaris and from 23 to 45 years for T. dobrogicus. In the anurans, ages varied from 2 to 5 years in B. bombina and from 4 to 10 years in the R. esculenta complex. The numbers of breeding opportunities (i.e., the number of years the adults reproduce) are similar in both newt species (3), while growth rates and age at maturity differ between the large- and small-bodied species. In anurans, the number of breeding opportunities for the smallest species, B. bombina (4), is associated with a high growth rate and earlier maturation. In the larger R. esculenta complex, the higher number of breeding opportunities (7) is associated with a low growth rate and delayed maturation. The study of age distribution and associated parameters provides useful information on population life history. We discuss how age structure and growth of amphibian populations in large river floodplains can be used as indicators of environmental conditions.
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Olgun K, Miaud C, Gautier P. Age, growth, and survivorship in the viviparous salamander Mertensiella luschani from southwestern Turkey. CAN J ZOOL 2001. [DOI: 10.1139/z01-111] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We describe the life-history traits (body size, age at maturity, longevity, and survivorship) of a terrestrial salamander, Mertensiella luschani, from a population living in the Mediterranean environment of southwestern Turkey. We used phalangeal skeletochronology to estimate the age of juveniles and adults. Lines of arrested growth, deposited during the winter cessation of bone growth, allowed us to estimate the age at maturity to be 3 years old in both sexes. Males attained a maximum age of 8, whereas females attained a maximum age of 10. Juveniles ranged from 1 to 3 years old. Males were smaller than females. Growth curves fitted to von Bertalanffy's equation revealed similar growth coefficients in adults and larger average maximum body lengths in males. Adult annual survivorship and adult life expectancy were 0.79 and 5.4 years, respectively. Knowledge of age, growth, and survivorship in this species under the constraints of a seasonal Mediterranean climate, and a comparison of similar traits in other salamandrid species, allow us to test predictions regarding optimal timing of growth and reproduction in these species.
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Variations in age, size at maturity and gestation duration among two neighbouring populations of the alpine salamander (Salamandra lanzai). J Zool (1987) 2001. [DOI: 10.1017/s0952836901000760] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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