Ecología del crecimiento de una lagartija del género Xenosaurus Peters 1861 (Squamata: Xenosauridae) en la Reserva de la Biosfera, Sierra Gorda, Querétaro, México

Zamora-Ábrego, Joan Gastón; Zúñiga‐Vega, J. Jaime; Ortega-León, Angela M.

doi:10.4067/s0716-078x2012000300006

Cited by 13 publications

(13 citation statements)

References 14 publications

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“…Using the selected models, we estimated growth curves for both males and females using the average SVL of hatchlings ( L 0 ;

\overset{false¯}{X}

= 22.1 ± 1.5 mm, range 19.0–24.0 mm, n = 11; hatchlings cannot be accurately sexed). With these curves, we were able to estimate the age at sexual maturity for each sex (Dunham, ; Schoener & Schoener, ; Zamora‐Abrego et al, ). We then used ANOVA to identify differences in growth rate between juveniles and adults of each sex, using season (wet and dry) and year (1989, 1990) as the predictors.…”

Section: Methodsmentioning

confidence: 99%

“…Growth rate for recaptured individuals in different age classes (juveniles and adults) was described with the equation GR = (SVL 2 -SVL 1 )/no. of days, where growth rate (GR) is the difference between SVL of the last recapture event (SVL 2 ) and the first one (SVL 1 ), divided by the number of days elapsed between them (Dunham, 1978;Zamora-Abrego et al, 2012). Growth rate was recorded over recapture intervals of 30 to 100 days (the longest F I G U R E 1 Anolis nebulosus (adult male) captured, marked and released at the Estación de Biología Chamela-UNAM in September 2011.…”

Section: Study Area and Field Workmentioning

confidence: 99%

“…Growth data, assessed by age class, sex, and year, were then fitted to three nonlinear regression models: the Von Bertalanffy model, the logistic-by-length model, and the logistic-by-weight model (Dunham, 1978;Schoener & Schoener, 1978). The Von Bertalanffy model assumes that smaller individuals grow faster than larger ones (Dunham, 1978;Zamora-Abrego et al, 2012; Table 1). The logistic-by-length and logistic-by-weight models predict that small individuals will grow quickly until they reach an intermediate size, when their growth rates will decrease nonlinearly (Dunham, 1978;Schoener & Schoener, 1978;Zamora-Abrego et al, 2012; Table 1).…”

Section: Study Area and Field Workmentioning

confidence: 99%

“…The Von Bertalanffy model assumes that smaller individuals grow faster than larger ones (Dunham, 1978;Zamora-Abrego et al, 2012; Table 1). The logistic-by-length and logistic-by-weight models predict that small individuals will grow quickly until they reach an intermediate size, when their growth rates will decrease nonlinearly (Dunham, 1978;Schoener & Schoener, 1978;Zamora-Abrego et al, 2012; Table 1). Importantly, maximum growth rate is reached at an earlier age in the logistic-by-length model than in the logistic-byweight model (Dunham, 1978).…”

Section: Study Area and Field Workmentioning

confidence: 99%

“…Lizard growth rate has been studied under two main theoretical approaches: ecological and phylogenetic (Zamora-Abrego, Zúñiga-Vega, & Ortega-León, 2012). The ecological hypothesis interprets growth rate as an expression of food availability, environmental factors (temperature and precipitation), parasite loads, and foraging success (Bronikowski, 2000;Kratochvíl & Frynta, 2003;Pérez-Mendoza & Zúñiga-Vega, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Ecology of the growth of Anolis nebulosus (Squamata: Dactyloidae) in a seasonal tropical environment in the Chamela region, Jalisco, Mexico

Hernández‐Salinas

Ramírez‐Bautista

Cruz‐Elizalde

et al. 2019

Ecology and Evolution

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Juvenile growth rates are thought to be restricted by available food resources. In animals that grow throughout the year, such as tropical lizards, growth is therefore predicted to be faster during the rainy season. We test this prediction using a population of Anolis nebulosus by describing the growth trajectories of both sexes using nonlinear regression models, and we then correlate the growth rates of individuals with food available in the environment, precipitation, and temperature. The Von Bertalanffy model fits the growth rates of the females better, while the logistic‐by‐length model fits the males better. According to both models, the males grew faster than females, reaching slightly smaller sizes at adulthood. Males reached sexual maturity when 35 mm long, at an age of seven months, and females matured at 37 mm (SVL), taking nine months to reach this size. In 1989, juvenile males and females grew more in both seasons (rainy and dry) than adults; for 1990, there were no differences by season or between age classes. These results are interesting since in the 1989 and 1990 rainy seasons, practically the same orders of prey and the greatest abundance of prey available in the environment were registered. A possible explanation could be that predation was more intense in 1990 than in 1989. There is little evidence that food, temperature, and humidity affect growth rates of A. nebulosus , refuting our predictions. This is mainly due to the low variation in growth observed in 1990. Therefore we think that the growth of this species reflects a complex combination of ecological and genetic factors.

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“…Using the selected models, we estimated growth curves for both males and females using the average SVL of hatchlings ( L 0 ;

\overset{false¯}{X}

Section: Methodsmentioning

confidence: 99%

Section: Study Area and Field Workmentioning

confidence: 99%

Section: Study Area and Field Workmentioning

confidence: 99%

Section: Study Area and Field Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ecology of the growth of Anolis nebulosus (Squamata: Dactyloidae) in a seasonal tropical environment in the Chamela region, Jalisco, Mexico

Hernández‐Salinas

Ramírez‐Bautista

Cruz‐Elizalde

et al. 2019

Ecology and Evolution

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Ecología trófica de la lagartija Xenosaurus mendozai (Squamata: Xenosauridae) en el estado de Querétaro, México

Zamora-Ábrego

Ortega-León

2016

Revista Mexicana de Biodiversidad

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Se determinó la ecología trófica de la lagartija Xenosaurus mendozai en Querétaro, México, identificando la importancia relativa de las presas consumidas y evaluando las diferencias intersexuales en la composición de la dieta, a lo largo de un año. Para ello, se calculó su valor de importancia (I X), se evaluó el nivel de especialización mediante el índice de Levins, así como el solapamiento mediante el índice de Pianka. Los análisis del contenido del tracto digestivo indican que son insectívoras y su dieta se basa principalmente en 12 órdenes, de los cuales las larvas de lepidópteros, los coleópteros y los ortópteros representan más del 60% de su dieta; por lo que la tendencia de esta población es hacia la especialización (B A = 0.015), con un alto índice de solapamiento entre machos y hembras (O MH = 0.946). En términos generales, la conformación de la dieta de esta especie es similar a lo registrado en otras especies del género, lo que puede estar determinado por el uso del microhábitat. Sin embargo, se requiere de estudio de disponibilidad de presas para describir con mayor precisión las preferencias alimentarias, así como para realizar pruebas experimentales que permitan determinar si existe preferencia por algún tipo particular de presas. Derechos Reservados © 2015 Universidad Nacional Autónoma de México, Instituto de Biología. Este es un artículo de acceso abierto distribuido bajo los términos de la Licencia Creative Commons CC BY-NC-ND 4.0.

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Variation in body size and reproductive characteristics among chromosomal races of theSceloporus grammicuscomplex in México

Cruz‐Elizalde

Ramírez‐Bautista

Hernández‐Salinas

et al. 2023

Biological Journal of the Linnean Society

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Populations and chromosomal races of a species often show variation in life-history characteristics due to phylogeny and environmental factors. We analysed variation in snout–vent length (SVL) and reproductive variables, such as minimum SVL at sexual maturity, litter size and embryo volume in females of the Sceloporus grammicus lizard complex, which includes seven chromosomal races as well as hybrid zones among different combinations of races (F5, F5 + 6, potential but unverified F5 + 6, F6, FM1, FM2, FM2 × F5 hybrid zone, FM3, LS and unverified SGG). The SGG, F5 and LS females were larger than F6 and FM3 females. Females with non-vitellogenic follicles and vitellogenic follicles were smaller than females with embryos. The SVL of females containing embryos varied among chromosomal races, the largest being the same as indicated above, but the smallest was the FM2 × F5 hybrid zone. Litter size was similar among chromosomal races (5.8 embryos), while embryo volumes varied among them. Two patterns of reproductive activity were found: seasonal and continuous reproduction. Our results showed the influence of environmental factors of each locality, which supports the ecological hypothesis. The use of chromosomal races did not reveal a significant phylogenetic effect, because allozyme and molecular data show only small pairwise genetic distances among the S. grammicus populations on the Mexican Plateau.

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Ecología del crecimiento de una lagartija del género Xenosaurus Peters 1861 (Squamata: Xenosauridae) en la Reserva de la Biosfera, Sierra Gorda, Querétaro, México

Cited by 13 publications

References 14 publications

Ecology of the growth of Anolis nebulosus (Squamata: Dactyloidae) in a seasonal tropical environment in the Chamela region, Jalisco, Mexico

Ecology of the growth of Anolis nebulosus (Squamata: Dactyloidae) in a seasonal tropical environment in the Chamela region, Jalisco, Mexico

Ecología trófica de la lagartija Xenosaurus mendozai (Squamata: Xenosauridae) en el estado de Querétaro, México

Variation in body size and reproductive characteristics among chromosomal races of theSceloporus grammicuscomplex in México

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