Broodstocks’ size (weight or length), age and larval feeding are crucial in the production of good quality gametes and larvae in any fish. Therefore, this study was conducted with two experiments to understand 1) effects of maternal weight and age, and 2) effects of maternal weight, age, larval feeding and their interactions on egg and larval traits using the Indian major carp (Labeo rohita). In both experiments, females were divided into two size groups based on their body weights (‘large’ and ‘small’) to obtain eggs and larvae. In experiment-1, parameters of egg quality such as egg weight, egg number, egg diameter, egg area and hatching rate were assessed, and larvae were reared up to two weeks with optimum feeds to evaluate their traits such as deformation rate, survival rate, total length and body area. In experiment-2, only the three-day old larvae were randomly assigned into two feeding regimes (‘everyday’ and ‘every other day’) up to two weeks to assess their fitness. The results revealed that egg weight, hatching rate, larval total length, body area increased significantly (P <0.05) and hatchling deformation rate decreased significantly (P <0.05) with the increase of female age, whereas only egg weight was linearly related to female weight (R² = 0.47, P <0.05) in experiment-1. The experiment-2 showed that everyday fed larvae had significantly (P <0.05) higher survival rate, total length and body area than those fed every other day. The dietary treatment found no significant effects of maternal age, weight and their interactions with larval feeding. Thus, the study showed that maternal body weight, age and larval feeding may influence some traits of egg and larval fitness. The overall findings suggest that maternal weight, age and regular larval feeding must be considered to produce good quality of gametes and larvae for sustainable production of this species.

亲鱼的体型（体重或体长），年龄和幼体喂养对于任何鱼类的优质配子和幼体的生产都是至关重要的。因此，本研究用两个实验进行了解1）使用印度主要鲤鱼产妇体重和年龄的影响，以及2）孕妇体重，年龄，幼虫取食的作用及其对蛋的相互作用和幼虫的性状（南亚野鲮）。在这两个实验中，根据雌性的体重（“大”和“小”）将雌性分为两个大小组，以获取卵和幼虫。在实验1中，评估了蛋质量的参数，如蛋重，蛋数，蛋直径，蛋面积和孵化率，并使用最佳饲料将幼虫饲养了两周，以评估其变形，存活率等特征。 ，总长度和身体面积。在实验2中，只有三天大的幼虫在两个星期内被随机分为两种喂养方式（“每天”和“每隔一天”），以评估它们的健康状况。结果表明，卵重，孵化率，幼虫总长，体表面积显着增加（P <0.05），孵化变形率显着下降（P<0.05）随着女性年龄的增加，而在实验1中，只有鸡蛋的重量与女性体重呈线性关系（R ² = 0.47，P <0.05）。实验2表明，每天喂食的幼虫比每隔一天喂食的幼虫的存活率，总长和体表面积显着提高（P <0.05）。饮食治疗未发现产妇年龄，体重及其与幼体喂养的相互作用的显着影响。因此，研究表明母体的体重，年龄和幼体的摄食可能会影响卵和幼体的某些性状。总体研究结果表明，必须考虑母体的体重，年龄和定期喂食幼虫，以生产出优质的配子和幼体，以可持续地生产该物种。