Reproductive effort of Plestiodon copei (Squamata, Scincidae), a highland viviparous lizard from Central Mexico

IF 0.8 4区 生物学 Q3 ZOOLOGY Herpetozoa Pub Date : 2024-01-08 DOI:10.3897/herpetozoa.37.e111749
Hermilo Sánchez-Sánchez, Adriana Jocelyn Morales-Gonzaga, Ken Oyama, J. Carlos Alvarado-Avilés
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Abstract

 Female reproductive effort is defined as the proportion of total energy or resources devoted to reproduction. In reptiles, there is frequently high inter- and intra-population variation related to several factors, such as food availability, climatic conditions, age and size, all of which, in turn, also influence survival and future reproduction. The present study is the first reproductive effort analysis of a population of the high-mountain scincid lizard Plestiodon copei in central Mexico, focusing on relative litter mass (RLM), investment per capita (INV) and productivity (PROD). We also compared the reproductive efficacy of P. copei to those of other Mexican congeners. We collected 24 gravid females of P. copei over a 4-year period and recorded a total of 90 neonates born in captivity. We found significant variation in neonatal mass amongst individual females and across years. We recorded an average litter size of 3.75 and an average litter mass of 1.25 g, which were positively correlated with both the size and total mass of the reproductive females. The RLM, INV and PROD values (0.301, 0.428 g and 1.236 g × year-1, respectively) for P. copei were greater than those for other Mexican species in the P. brevirostris group (0.290, 0.412 g and 1.135 g × year-1), revealing that females of P. copei from Tenango invest a comparatively high amount of their resources in reproduction.
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墨西哥中部高原胎生蜥蜴 Plestiodon copei(有鳞目,蝎科)的繁殖努力
雌性繁殖力是指用于繁殖的能量或资源占总能量或资源的比例。在爬行动物中,种群间和种群内的差异经常很大,这与多种因素有关,如食物的可获得性、气候条件、年龄和体型,所有这些因素反过来也会影响生存和未来的繁殖。本研究是首次对墨西哥中部高山鳞蜥 Plestiodon copei 种群的繁殖努力进行分析,重点关注相对产仔数(RLM)、人均投资(INV)和生产率(PROD)。我们还比较了 P. copei 与墨西哥其他同种蜥蜴的繁殖效率。我们收集了 24 只在 4 年内怀孕的雌性 P. copei,并记录了在人工饲养条件下出生的 90 只新生儿。我们发现,雌性个体之间以及不同年份之间的新生儿体重差异很大。我们记录的平均产仔数为 3.75 头,平均产仔质量为 1.25 克,这与繁殖雌性的体型和总质量呈正相关。Copei的RLM值、INV值和PROD值(分别为0.301、0.428克和1.236克×年-1)均大于P. brevirostris组中其他墨西哥物种的RLM值、INV值和PROD值(分别为0.290、0.412克和1.135克×年-1),这表明Tenango的雌性P.
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来源期刊
Herpetozoa
Herpetozoa ZOOLOGY-
CiteScore
1.90
自引率
11.10%
发文量
27
审稿时长
>12 weeks
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