Embryo development indices for the endangered Chinese sturgeon, Acipenser sinensis: the role of temperature on incubation time

IF 1.4 4区 环境科学与生态学 Q3 ECOLOGY
Xuetao Shi, Kan Xiao, Guangyuan Peng, Hongtao Huang, Dongmei Xiong, Nikolai Barulin, Jing Yang
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Abstract

The impact of global warming on the initial growth and development of fish, including sturgeons, is evident. The embryonic development phase is crucial for the preservation and propagation of the Chinese sturgeon, yet the specific influence of water temperature on this process remains inadequately documented. This study conducted experiments using three temperature groups (16, 19, and 22 ℃) to investigate the impact of temperature on the embryonic development of Chinese sturgeon. Subsequently, five statistical models were utilized to fit the developmental data through regression analysis, in order to determine the correlation between incubation time and temperature of the embryos. Data from cultured Chinese sturgeon embryos were finally utilized to validate water temperature development indices. Over the temperature range of 16–22 ℃, water temperature was positively related to the rate of embryonic development in Chinese sturgeon. The time to hatching in the group experiencing the highest temperature (22 ℃) was nearly cut in half in comparison to the group exposed to the lowest temperature (16 ℃). Among the five regression models, the S (sigmoidal) model was the best for predicting the incubation period of Chinese sturgeon embryos from temperature (R2 = 0.939, p < 0.01). Based on the progression from incubation to initial hatching, we estimated daily development indices, ranging from 10.66 to 32.22% between 14 and 25.9 ℃. The water temperature development indices of Chinese sturgeon established in this study have the potential to improve the accuracy of predicting hatch timing and the transfer of fish fry, thereby aiding in the conservation and enhancement of Chinese sturgeon resources.

Abstract Image

濒危中华鲟胚胎发育指数:温度对孵化时间的影响
全球变暖对包括中华鲟在内的鱼类初始生长和发育的影响显而易见。胚胎发育阶段对中华鲟的保存和繁殖至关重要,但水温对这一过程的具体影响仍未得到充分记录。本研究使用三个温度组(16、19 和 22 ℃)进行实验,研究温度对中华鲟胚胎发育的影响。随后,通过回归分析,利用五个统计模型对发育数据进行拟合,以确定孵化时间与胚胎温度之间的相关性。养殖中华鲟胚胎的数据最终被用来验证水温发育指数。在 16-22 ℃的温度范围内,水温与中华鲟胚胎发育速度呈正相关。最高温度组(22 ℃)的孵化时间比最低温度组(16 ℃)缩短了近一半。在五个回归模型中,S(sigmoidal)模型是通过温度预测中华鲟胚胎孵化期的最佳模型(R2 = 0.939,p <0.01)。根据中华鲟胚胎从孵化到初孵的过程,我们估算了中华鲟胚胎的日发育指数,14-25.9 ℃之间的日发育指数从10.66%到32.22%不等。本研究建立的中华鲟水温发育指数有望提高中华鲟孵化时间和鱼苗转移预测的准确性,从而有助于中华鲟资源的保护和增殖。
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来源期刊
Environmental Biology of Fishes
Environmental Biology of Fishes 环境科学-海洋与淡水生物学
CiteScore
2.60
自引率
14.30%
发文量
169
审稿时长
3 months
期刊介绍: Environmental Biology of Fishes is an international journal that publishes original studies on the ecology, life history, epigenetics, behavior, physiology, morphology, systematics and evolution of marine and freshwater fishes. Empirical and theoretical papers are published that deal with the relationship between fishes and their external and internal environment, whether natural or unnatural. The journal concentrates on papers that advance the scholarly understanding of life and draw on a variety of disciplines in reaching this understanding. Environmental Biology of Fishes publishes original papers, review papers, brief communications, editorials, book reviews and special issues. Descriptions and submission requirements of these article types can be found in the Instructions for Authors.
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