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首页> 外文期刊>Marine and Freshwater Behaviour and Physiology >Sex and reproductive stage differences in the growth, metabolism, feed, fecal production, excretion and energy budget of the Amazon River prawn (Macrobrachium amazonicum)
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Sex and reproductive stage differences in the growth, metabolism, feed, fecal production, excretion and energy budget of the Amazon River prawn (Macrobrachium amazonicum)

机译：亚马逊河虾（亚马逊河虾）的生长，代谢，饲料，粪便生产，排泄和能量收支的性别和生殖阶段差异

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The aim of this study was to evaluate differences in various physiological measures (growth, fecal production, feed intake, nitrogenous excretion, oxygen consumption, energy substrate used, and energy budget) among males, ovigerous females and non-ovigerous females of the freshwater prawn Macrobrachium amazonicum. This species exhibits pronounced sexual dimorphism and different male morphotypes and has the potential for use in aquaculture. Males and non-ovigerous females were studied for 30 days. Ovigerous females were studied for 10 days. Prawns were fed commercial prawn food, and all males were of the Translucent Claw (TC) morphotype. The results demonstrate physiological differences both between males and females and between females of different reproductive stages. Males had higher rates of ingestion, growth and oxygen consumption and less fecal loss than females. We postulate that in the absence of other morphotypes, TC males may exhibit increased growth rates. Males and females used protein as an energy substrate. Males channeled approximately 9% of their energy budget into growth, whereas non-ovigerous and ovigerous females channeled only 1.4 +/- 0.4 and 0.07 +/- 0.07%, respectively. Whereas males and non-ovigerous females channeled 9.0 +/- 9.74 and 61.8 +/- 3.0%, respectively, of the energy ingested into metabolism, ovigerous females channeled 97.7 +/- 4.7% into metabolism, likely due to the frequent beating of their pleopods, which oxygenates and cleans the eggs. As reported for marine prawns, males and non-ovigerous females of M. amazonicum lost approximately 5% of their ingested energy in exuviae. The physiological differences observed between the sexes and between females of different reproductive stages might reflect corresponding differences in patterns of activity, growth, and reproduction.
机译：这项研究的目的是评估淡水虾雄性，雌性和非雌性在各种生理指标（生长，粪便生产，饲料摄入，氮排泄，耗氧量，使用的能量底物和能量收支）上的差异。亚马逊沼虾。该物种表现出明显的性二态性和不同的雄性形态型，并具有用于水产养殖的潜力。对雄性和非雄性雌性进行了30天的研究。产卵的雌性进行了10天的研究。大虾以商业对虾食物为食，所有雄性均为半透明爪（TC）形态型。结果表明，雄性和雌性之间以及不同生殖阶段的雌性之间的生理差异。男性比女性具有更高的摄入，生长和耗氧率，粪便流失更少。我们假设在没有其他形态型的情况下，TC雄性可能表现出增长的速率。男性和女性使用蛋白质作为能量底物。雄性将大约9％的能量预算用于增长，而非雄性和雌性雌性分别仅将1.4 +/- 0.4和0.07 +/- 0.07％引导。雄性和非雌性雌性分别将9.0 +/- 9.74和61.8 +/- 3.0％的能量吸收到新陈代谢中，而雌雄性雌性则将97.7 +/- 4.7％的能量吸收到新陈代谢中，这可能是由于她们经常被殴打腹足动物，可以充氧并清洁卵子。如关于海虾的报道，马氏马拉松的雄性和非雌性雌性在虾足类中损失了大约5％的摄入能量。性别之间以及生殖阶段不同的雌性之间观察到的生理差异可能反映出活动，生长和繁殖方式的相应差异。

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