Fall Reproductive Activity in the High Altitude Mexican Lizard, Sceloporus grammicus microlepidotus

Casas-Andreu, Gustavo

doi:10.2307/1563845

Cited by 84 publications

(61 citation statements)

References 18 publications

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“…These data suggest that mating takes place in autumn and gestation lasts 9-10 months. This cycle is similar to many other viviparous lizards in México and the southwestern USA and is probably related to the seasonality of the region (e.g., Barisia imbricata, Guillette & CasasAndreu, 1987; Eumeces copei, Guillette, 1983; Sceloporus grammicus, Guillette & Casas-Andreu, 1980;S. jarrovi, Ballinger, 1973;S.…”

Section: Discussionsupporting

confidence: 74%

“…Therefore, the flattened morphology does not constrain reproductive output in Xenosaurus, as much as has been suggested for Tropidurus semitaeniatus (Vitt, 1981(Vitt, , 1993. Most other viviparous lizards without a flattened morphology show a positive relationship between female SVL and litter size (e.g., Eumeces copei, Guillette, 1983;Mabuya capensis, Flemming, 1994; Sceloporus grammicus, Guillette & Casas-Andreu, 1980;S. jarrovi, Ballinger, 1973;S.…”

Section: Discussionmentioning

confidence: 87%

See 1 more Smart Citation

Reproduction in females of three species of crevice-dwelling lizards (genus Xenosaurus) from Mexico

Ballinger¹,

Lemos‐Espinal²,

Smith³

2000

Studies on Neotropical Fauna and Environment

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Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 87%

Reproduction in females of three species of crevice-dwelling lizards (genus Xenosaurus) from Mexico

Ballinger¹,

Lemos‐Espinal²,

Smith³

2000

Studies on Neotropical Fauna and Environment

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“…To what extent does this vary with the reproductive cycle and animal condition? (4) Although S. grammicus would not be as tractable to work with in the lab as Mus , grammicus born in the spring are capable of breeding in their first autumn [Guillette and Casas-Andre, 1980], which suggests that it would be practical to study meiotic pairing and assortment in progeny from controlled matings of chromosomally different parents.…”

Section: Conclusion and Unanswered Questionsmentioning

confidence: 99%

Chromosome Variation, Genomics, Speciation and Evolution in <i>Sceloporus</i> Lizards

Hall¹

2009

Cytogenet Genome Res

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The clade of the North American lizard genus Sceloporus and its relatives comprising the subfamily Phrynosomatinae (Iguanidae) includes perhaps 150 evolutionary lineages. The work reviewed here begins with the discovery of the concentration of Robertsonian chromosomal variability in Sceloporus more than 40 years ago and cytogenetic and genomic evidence of remarkable chromosomal variation within the S. grammicus complex associated with narrow zones of hybridization between different chromosomal races. These discoveries led to hypotheses about hybrid zones involving negative heterosis, possible modes of chromosomal speciation, and the potential roles of such speciation in phylogenesis. The radiation of Sceloporus has now been studied by many different workers extending and mapping the geographic distribution of cytogenetic and genomic variation to understand the biology of the chromosomal variation and to establish the phyletic relationships of the various lineages. The result is a robust phylogeny and a large and still growing database of genic, cytogenetic and other biological parameters. These materials provide a rich series of natural experiments to support both synthetic-comparative and analytical studies of the roles of chromosomal variation, hybrid zones and modes of speciation in phylogenesis and evolutionary success.

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“…Matings occur in September, females are pregnant during~8 months, and births take place during May and June. Mean (SE) litter size is 5.2 ± 0.25 young (Guillette and Casas-Andreu 1980;Zúñiga-Vega et al 2008).…”

Section: Study Speciesmentioning

confidence: 99%

Demography of the lizard Sceloporus grammicus: exploring temporal variation in population dynamics

2008

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We conducted a 5 year demographic study in one population of the viviparous lizard Sceloporus grammicus Wiegmann, 1828 in central México. The population was structured in three size classes (juveniles, small adults, and asymptotic adults) for which we estimated annual survival and fecundity rates. A population projection matrix was constructed for each annual transition. All of them resulted in finite rates of population growth (l) that, although variable from year to year (from 0.808 to 1.065), were not significantly different than unity, indicating population stability. Elasticity analysis revealed that survival staying in the same size class was the demographic process that made the greatest contribution to l values in most years. Similarly, the stasis of large adults was the vital rate with the highest relative importance for population persistence. To incorporate the observed yearly variation in long-term population projections, we used a mean matrix, a stochastic simulation, and a resampling procedure. All these resulted in long-term population growth rates that were not significantly different than unity. Our results indicate overall demographic stability for the studied population of S. grammicus.Résumé : Nous avons mené une étude démographique de 5 ans sur une population du lézard vivipare Sceloporus grammicus Wiegmann, 1828 dans le centre du Mexique. La population est structurée en trois classes de taille (jeunes, petits adultes, adultes de taille asymptotique) pour lesquelles nous avons estimé les taux annuels de survie et de fécondité. Nous avons construit une matrice démographique de projection pour chaque transition annuelle. Toutes les matrices donnent des taux réels de croissance de la population (l) qui, bien que variables d'une année à l'autre (de 0,808 à 1,065), ne diffèrent pas significativement de 1, ce qui indique une population stable. Une analyse d'élasticité montre que la survie des individus qui restent dans la même classe de taille est le processus démographique qui contribue le plus aux valeurs de l la plupart des années. De même, la stase des grands adultes est le taux vital qui présente l'importance relative la plus grande pour la persistance de la population. Afin d'incorporer les variations annuelles observées dans les projections démographiques à long terme, nous avons utilisé une matrice moyenne, une simulation stochastique et une procédure de ré-échantillonnage. Toutes ces méthodes ont fourni des taux de croissance de population qui ne diffèrent pas significativement de l'unité. Nos résultats indiquent globalement la stabilité démographique de la population de S. grammicus que nous avons étudiée.[Traduit par la Rédaction]

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Fall Reproductive Activity in the High Altitude Mexican Lizard, Sceloporus grammicus microlepidotus

Cited by 84 publications

References 18 publications

Reproduction in females of three species of crevice-dwelling lizards (genus Xenosaurus) from Mexico

Reproduction in females of three species of crevice-dwelling lizards (genus Xenosaurus) from Mexico

Chromosome Variation, Genomics, Speciation and Evolution in <i>Sceloporus</i> Lizards

Demography of the lizard Sceloporus grammicus: exploring temporal variation in population dynamics

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