Marine Ecology Laboratory, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata, 700073, India.
Marine Ecology Laboratory, Department of Life Sciences, Presidency University, 86/1, College Street, Kolkata, 700073, India.
J Therm Biol. 2021 Apr;97:102829. doi: 10.1016/j.jtherbio.2020.102829. Epub 2021 Jan 13.
Global climate change induced warming has profound repercussion on physiological performances of marine animals. The Indian Sundarban is one of the best nursery grounds for various shrimp populations which need estuarine realm to complete their bipartite life cycle. From last couple of decades, a clear indication of temperature escalation has been identified in Sundarban. In the present study, we have assessed the physiological energetics of Penaeus monodon post larvae from Indian Sundarban under different temperatures, 28 °C (annual average habitat temperature) and elevated temperatures 30 °C, 32 °C, 34 °C in a month long mesocosm experiment. Significant alterations were observed in growth performances as well as physiological energetics. The length, weight, survival percentages, ingestion rates were reduced, howbeit respiration and ammonia excretion rate had been increased in elevated temperature treatments culminating in a negative Scope for Growth. PERMANOVA results showed a significant (p ≤ 0.05) variation in different physiological performances of shrimp post larvae both in different temperature treatments and days of exposure. The present results clearly highlighted the detrimental effect of elevated temperature on physiological energetics of shrimp larvae that might potentially reduce shrimp population and affect the coastal fishery.
全球气候变化引起的变暖对海洋动物的生理性能产生了深远的影响。印度孙德尔本斯是各种虾类种群的最佳育苗场之一，它们需要河口环境才能完成其双相生命周期。在过去的几十年中，孙德尔本斯的温度上升已经得到了明确的证实。在本研究中，我们在为期一个月的中观实验中，评估了来自印度孙德尔本斯的斑节对虾幼体在不同温度下的生理能量学，分别为 28°C（年平均栖息地温度）和升高的温度 30°C、32°C、34°C。在生长表现和生理能量学方面都观察到了显著的变化。在升高温度的处理中，体长、体重、存活率、摄食率降低，而呼吸和氨排泄率增加，导致生长范围为负。PERMANOVA 结果表明，在不同温度处理和暴露天数下，虾幼体的不同生理表现都有显著的（p≤0.05）变化。本研究结果清楚地强调了升高温度对虾类幼虫生理能量学的不利影响，这可能会降低虾类种群数量并影响沿海渔业。
