Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest University, Chongqing, 400715, China.
Department of Clinical Medicine, Chongqing Medical and Pharmaceutical College, Chongqing, 401331, China.
BMC Ecol Evol. 2023 Dec 7;23(1):72. doi: 10.1186/s12862-023-02186-y.
This study explores the age, growth, and energy storage of Triplophysa rosa, a troglobitic cavefish. A total of 102 wild T. rosa specimens were collected in Wulong County, Chongqing, China, between 2018 and 2022, with otoliths used for age determination.
The earliest mature individuals were determined to be 4.8 years old, while the maximum ages for females and males were estimated at 15.8 years and 12.2 years, respectively. The length (L, cm)-weight (W, g) relationship was found to be the same for both sexes, following the eq. W = 0.0046 L. Von Bertalanffy growth models were applied to the total length-at-age data, resulting in an asymptotic length of 23.4 cm and a K-parameter of 0.060 year. The body content of protein, ash, and glycogen did not show a significant correlation with the total length of T. rosa. However, both lipid and energy content exhibited a significant increase with total length. The lipid content ranged from 40.5 to 167.1 mg g, while the energy content ranged from 4.50 to 11.39 kJ g, indicating high storage features of T. rosa.
The results affirm that T. rosa exhibits life traits conducive to its population dynamics in cave conditions, characterized by slow growth, small size, and high lipid energy storage.
本研究探讨了洞穴鱼类玫瑰副无须魮的年龄、生长和储能。2018 年至 2022 年期间，在中国重庆武隆县共采集了 102 只野生玫瑰副无须魮标本，使用耳石进行年龄测定。
最早成熟的个体年龄为 4.8 岁，而雌、雄鱼的最大年龄估计分别为 15.8 岁和 12.2 岁。雌雄两性的体长（L，cm）-体重（W，g）关系相同，符合公式 W = 0.0046 L。Von Bertalanffy 生长模型应用于全长年龄数据，得出渐近体长为 23.4cm，K 参数为 0.060 年。鱼体的蛋白质、灰分和糖原含量与玫瑰副无须魮的全长无显著相关性。然而，脂肪和能量含量与全长呈显著正相关。脂肪含量范围为 40.5 至 167.1mg g，能量含量范围为 4.50 至 11.39kJ g，表明玫瑰副无须魮具有较高的储能特征。
研究结果证实，玫瑰副无须魮表现出有利于其在洞穴条件下种群动态的生活特征，生长缓慢、体型小、脂肪能量储存高。
