Programa de Pós-graduação em Recursos Naturais - PGRN, Universidade Estadual de Mato Grosso do Sul - UEMS, Rod. Dourados Itahum, Km 12, CEP 79804-970, Dourados, MS, Brasil.
Curso de Graduação em Ciências Biológicas, Unidade Universitária de Dourados, Universidade Estadual de Mato Grosso do Sul - UEMS, Rod. Dourados Itahum, Km 12, CEP 79804-970, Dourados, MS, Brasil.
Braz J Biol. 2021 Mar-May;81(2):326-334. doi: 10.1590/1519-6984.225352.
This work aimed to describe the reproductive biology of Hypoptopoma inexspectatum in southern Pantanal. A total of 538 individuals were sampled and analyzed from February 2009 through January 2011 in southern Pantanal. We did not observe differences in sex-ratio, and both sexes presented positive allometric length/weight relationship (LWR). Reproduction occurs mainly from January to February. Females reached first maturation (L50) with 37.80 mm and males with 45.80 mm. Absolute fecundity is estimated in mean=177.43 (sd±127.06) oocytes and relative fecundity in 3.12 (sd±2.23) oocytes/mg. Fecundity is positively correlated with standard length (Spearman r= 0.43; p=0.013), and total spawning is a used spawning strategy for H. inexspectatum.
本研究旨在描述南方潘塔纳尔 Hypoptopoma inexpectatum 的生殖生物学。2009 年 2 月至 2011 年 1 月期间，我们在南方潘塔纳尔共采集和分析了 538 个个体。我们没有观察到性比的差异，雌雄两性均呈现正异速生长体长/体重关系（LWR）。繁殖主要发生在 1 月至 2 月。雌性达到第一次成熟（L50）时体长为 37.80 毫米，雄性为 45.80 毫米。绝对产卵量估计为 177.43（标准差±127.06）个卵，相对产卵量为 3.12（标准差±2.23）个卵/毫克。产卵量与标准体长呈正相关（Spearman r=0.43；p=0.013），总产卵是 H. inexpectatum 的一种产卵策略。
