The present study examines the effect of temperature and salinity on the larval development and survival of Macrobrachium rosenbergii. The larvae showed 100 % mortality at higher temperature (33.5 ± 0.5 °C) in all the salinity conditions (12, 15, and 20 PPT). The survival rate varied between 76-96 % on exposure to lesser temperature conditions. Likewise, the post-embryonic yolk lasted for 4 days at ambient temperature (29 °C); whereas, at 33.5 ± 0.5 °C, it lasted only for 2-3 days. There was an increase in total length of larvae, when exposed to higher temperature and salinity. For the cardiac performance, larval heart beat (f_H) significantly increased for higher temperature and salinity conditions (20 PPT; 33.5 °C) and lowered at ambient condition 12 PPT; 29 °C. Larval stroke volume V_s, Cardiac output (Qt) were higher in ambient conditions and lowest in higher temperature and salinity conditions. The larval activity decreased significantly at higher temperature and salinity conditions, compared to ambient conditions.

中文翻译：

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淡水虾（Macrobrachium rosenbergii De Man，1879）早期生命史阶段对环境胁迫的生理耐受性

本研究探讨了温度和盐度对罗氏沼虾幼体发育和存活的影响。在所有盐度条件下（12、15和20 PPT），幼虫在较高温度（33.5±0.5°C）下显示100％的死亡率。暴露于较低温度条件下的存活率在76-96％之间变化。同样，胚后卵黄在环境温度（29°C）下持续4天；而在33.5±0.5°C下，它只能持续2-3天。当暴露于较高温度和盐度下时，幼虫的总长度增加。对于心脏表现，幼虫心跳（f _H）在较高温度和盐度条件下（20 PPT; 33.5°C）显着增加，在环境条件下为12 PPT时显着降低；29°C。在环境条件下幼虫的行程容积V _s，心输出量（Qt）较高，而在较高温度和盐度条件下则最低。与环境条件相比，在较高温度和盐度条件下，幼虫活性显着下降。