Ciclo reproductor de Sceloporus ochoterenae en el estado de Morelos, México

Abstract

Se estudió el ciclo de reproducción de Sceloporus ochoterenae en una población que vive en un relicto de selva baja caducifolia en el centro de Morelos. Los machos con longitud hocico-cloaca (LHC) promedio de 49.53 ± 2.40 mm, son más grandes y más pesados (x = 3.66 ± 0.68 g) que las hembras (LHC 46.37 ± 2.08 mm, peso 3.34 ± 1.23 g), lo que revela dimorfismo sexual como ocurre en otras especies de lagartijas sceloporinas. Existen diferencias en los ciclos de reproducción entre los sexos, los machos inician la actividad reproductora en marzo con la máxima actividad en mayo, y las hembras al inicio de la temporada de lluvias (mayo), con el periodo de mayor actividad durante la temporada de lluvias (julio). La temperatura y precipitación están correlacionadas positivamente con los ciclos de reproducción de machos y hembras. El tamaño promedio de la nidada, fue de 5 huevos y se relaciona positivamente con el tamaño de las hembras. En contraste, el tamaño y peso de las hembras no tuvieron efecto significativo sobre la masa relativa de la nidada (promedio = 0.245). En general, las características reproductoras de la población de Morelos son diferentes a las observadas en Guerrero.

Reproductive cycle of the oviparous lizard Sceloporus jalapae, from Zapotitlán Salinas, Puebla, Mexico

“…Gonadal recrudescence of both sexes coincides with an increase in temperature, and reproductive activity extends until late summer, when temperature begins to decrease (Figure ). This pattern is shared with S. ochoterenae , the sister species of S. jalapae ( Wiens et al., ) that inhabits in a tropical deciduous forest (Bustos‐Zagal et al., ). However, the period of reproductive activity of S. ochoterenae is shorter than the one shown by S. jalapae , which suggests that several squamate life history traits are restricted by environment (Guillette & Méndez‐de la Cruz, ).…”

“…However, all individuals born in a season could reproduce in the following spring. Early sexual maturity has been considered an exclusive characteristic of viviparous species within Sceloporus (Guillette & Méndez‐de la Cruz, ; Méndez‐de la Cruz et al., ), but individuals of several oviparous species of small size can also reproduce some months after birth (Bustos‐Zagal et al., ; Hernández‐Gallegos et al., , ; Manríquez‐Morán et al., ).…”

“…The study of reproductive patterns of oviparous and viviparous species of temperate and tropical environments (Bustos‐Zagal, Méndez‐de la Cruz, Castro‐Franco, & Villagrán‐Santa Cruz, ; Dunham et al., ; Gadsden, Rodríguez‐Romero, Méndez‐de la Cruz, & Gil‐Martínez, ; García‐Collazo et al., ; Guillette & Casas‐Andreu, ; Hernández‐Gallegos, Méndez‐de la Cruz, Villagrán‐Santa Cruz, & Andrews, ; Hernández‐Gallegos et al., ; Manríquez‐Morán, Villagrán‐Santa Cruz, & Méndez‐de la Cruz, ; Méndez‐de la Cruz, Guillette, Villagrán‐Santa Cruz, & Casas‐Andreu, ; Méndez‐de la Cruz & Villagrán‐Santa Cruz, ) has shown differences in reproductive phenology between the species of Sceloporus . In temperate areas, reproductive activity of oviparous species is limited to spring and summer months in species such as S. aeneus , S. occidentalis , S. scalaris and S. spinosus (Goldberg, ; Guillette, , ; Hernández‐Gallegos et al., ; Manríquez‐Morán et al., ; Méndez‐de la Cruz, Villagrán‐Santa Cruz, López Ortíz, & Hernández‐Gallegos, ; Newlin, ); vitellogenesis and ovulation occur in spring, oviposition in late spring and the birth of hatchlings in late summer and fall.…”

Reproduction and sexual dimorphism in the viviparous lizard Sceloporus palaciosi (Squamata: Phrynosomatidae) from the Trans‐Mexican Volcanic Belt, Mexico

“…The lengths and widths of the gonads were used to obtain testicular and follicular volume ( V ), which was calculated using the formula of an ellipsoid: V = (4/3) πa 2 b , where a is one‐half the shortest diameter and b is one‐half the longest diameter (Ramírez‐Bautista & Vitt, 76; Selby, 85). Testicular and follicular volumes were used as indicators of reproductive activity of both sexes (Bustos‐Zagal, Méndez‐de la Cruz, Castro‐Franco, & Villagrán‐Santa Cruz, 6; Hernández‐Salinas et al, 30; Ramírez‐Bautista et al, 71; Ramírez‐Pinilla, Calderón‐Espinosa, Flores‐Villela, Muñoz‐Alonso, & Méndez‐de La Cruz, 77).…”

Reproduction in Sceloporus licki (Reptilia: Phrynosomatidae) in the Cape Region, Baja California Sur

“…Although there have been several studies on reproductive cycles in oviparous species within different environments, in general, it has been determined that the reproductive activity of oviparous species in temperate areas is seasonal and is restricted to spring and summer. It is the most common pattern where reproductive events between both sexes occur synchronously (Bustos‐Zagal, Méndez‐de la Cruz, Castro‐Franco, & Villagrán‐Santa Cruz, 2011; Fitch, 1970; Goldberg, 2014; Guillette & Méndez‐de la Cruz, 1993; Hernández‐Gallegos et al., 2014; Méndez‐de la Cruz, Villagrán‐Santa Cruz, López‐Ortíz, & Hernández‐Gallegos, 2013; Villagrán‐Santa Cruz et al, 2009). However, a few recent studies have shown that there is variation in the time, duration and intensity of the different gametogenic phases (see Granados‐González et al., 2015, 2017).…”