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Zoolog Sci


Title:Maternal Effects Via Resting eggs in Predator Defense of the Rotifer Brachionus calyciflorus
Author(s):Li X; Niu C;
Address:"Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing, 100875, China"
Journal Title:Zoolog Sci
Year:2018
Volume:35
Issue:1
Page Number:49 - 56
DOI: 10.2108/zs170062
ISSN/ISBN:0289-0003 (Print) 0289-0003 (Linking)
Abstract:"Maternal effects play important evolutionary and ecological roles. Amictic female mothers of monogonont rotifer Brachionus calyciflorus can transmit predatory information of Asplanchna brightwellii in their environment to their offspring by changing the offspring's defensive morphology to increase their fitness. However, it remains unclear whether such maternal effects also exist during sexual reproduction of a mictic mother. This study explored the maternal effect in mictic mothers using the B. calyciflorus and A. brightwellii as a prey-predator model. We collected resting eggs from two groups of mictic mothers that previously experienced environments with (P environment) or without (NP environment) Asplanchna kairomones. Stem females from the resting eggs of each maternal group were also hatched and reared in P and NP environments. The population growth rate of offspring who experienced the same environment as their mictic mothers was significantly higher than those that experienced a different environment. When exposed to a gradient of predator kairomone levels, the posterolateral spine of the offspring elongated with increasing kairomone concentration. Offspring from the P mictic mother showed significantly shorter posterolateral spines than those from the NP mictic mother at each predator kairomone level. Offspring originating from NP mictic mothers clearly elongated their posterolateral spines at low concentrations of predator kairomones, while those from P mothers elongated their posterolateral spines only at the highest levels of predator kairomone. Our findings highlight the existence of anticipatory maternal effects during the sexual process via resting eggs of B. calyciflorus in response to predator kairomone"
Keywords:Animals *Environment Female Food Chain *Maternal Inheritance Population Growth Reproduction Rotifera/*genetics/physiology Brachionus calyciflorus inducible defense maternal effect predator kairomone resting egg;
Notes:"MedlineLi, Xiaoxuan Niu, Cuijuan eng Japan 2018/02/09 Zoolog Sci. 2018 Feb; 35(1):49-56. doi: 10.2108/zs170062"

 
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