Predator kairomone triggers sexual reproduction of Daphnia population via increasing population density
Predator kairomone triggers sexual reproduction of Daphnia population via increasing population density
复制标题
捕食者利他酮通过增加种群密度触发水蚤种群的有性繁殖
DOI：
10.1111/fwb.13969
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发表时间：
2022-07
影响因子：
2.7
通讯作者：
Zhou Yang
中科院分区：
文献类型：
--
作者：
Qiming Zhou;Jing Huang;Lei Gu;Kai Lyu;Yuan Huang;Zhou Yang
捕食风险和拥挤都可以诱导水蚤的有性繁殖，捕食者凯洛蒙也可以导致种群拥挤。然而，目前尚不清楚有性繁殖是由凯龙酮本身引起的，还是间接由凯龙酮诱导的群体引起的。在本研究中，我们在鱼类凯龙酮存在的情况下培养了水蚤，新生的后代被保留(增加种群密度)或移出(固定种群密度)。用结构方程模型分析了鱼类凯旋酮、种群密度和有性繁殖指标之间的关系，结果表明，当种群中保留后代时，种群密度和有性繁殖同时随着鱼类凯旋酮的存在而增加，而有性繁殖不受鱼类凯旋酮单独存在的直接影响。相反，在保持种群密度不变的情况下，种群密度越大，罗非鱼的雌雄比越高，但鱼类凯旋酮的存在并不促进有性繁殖。结构方程模型分析表明，种群密度而不是鱼类凯龙酮是促进有性繁殖的显著因素。本研究结果表明，种群密度直接触发有性繁殖。我们的观察为环境诱导的有性繁殖提供了新的见解，在此基础上，我们建议在决定有性繁殖时更彻底地考虑环境因素之间的相互作用。
Both predation risk and crowding can induce sexual reproduction inDaphnia, and predator kairomones can also cause population crowding. It is, however, unclear as to whether sexual reproduction is caused by kairomone per se or indirectly by kairomone‐induced crowding.In this study, we culturedDaphnia pulexin the presence of fish kairomone, with newborn offspring being retained (increasing population density) or removed (constant population density). The relationships among fish kairomone, population density, and indicators of sexual reproduction were assessed using structural equation models.The results showed that when offspring were retained in the population, the population density and sexual reproduction byDaphniasimultaneously increased in response to the presence of the fish kairomone, whereas sexual reproduction was not directly affected in the presence of fish kairomones alone. Conversely, when maintaining a constant population density, the number of ephippia and ratio of male to female ofDaphniaincreased with increasing population density, but the presence of fish kairomone did not promote sexual reproduction. Structural equation model analysis indicated that population density, rather than the fish kairomone, was the significant factor promoting sexual reproduction.The findings of this study indicate that population density directly triggers sexual reproduction inDaphniapopulations. Our observations provide new insights into environmentally induced sexual reproduction, and on this basis, we suggest that a more thorough consideration of the interactions among environmental factors in determining sexual reproduction is necessary.
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影响因子：
2.7
作者：
M. Ślusarczyk
通讯作者：
M. Ślusarczyk
影响因子：
2.6
作者：
Gowler CD;Rogalski MA;Shaw CL;Hunsberger KK;Duffy MA
通讯作者：
Duffy MA
DOI：
10.1002/jez.1807
发表时间：
2013-10-01
影响因子：
2.8
作者：
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通讯作者：
Miura, Toru
DOI：
10.1086/physzool.4.4.30151162
发表时间：
1931-10
期刊：
Physiological Zoology
影响因子：
--
作者：
C. A. Stuart;H. J. Cooper;J. Tallman
通讯作者：
C. A. Stuart;H. J. Cooper;J. Tallman
DOI：
10.1098/rspb.2017.2176
发表时间：
2018-01-31
影响因子：
4.7
作者：
Gerber, Nina;Kokko, Hanna;Booksmythe, Isobel
通讯作者：
Booksmythe, Isobel