Multiple stressors lead to complex responses in reproductive behaviors in an African cichlid  

作　　者：Bethany Williams Lauren Pintor Suzanne Gray 

机构地区：[1]Department of Biology,University of Missouri-1 University Blvd,St.Louis,St.Louis,MO 63121,USA

出　　处：《Current Zoology》2024年第6期821-832,共12页动物学报（英文版）

基　　金：supported by the National Science Foundation Grant No.1656542 awarded to SMG and LMP.

摘　　要：Exposure to multiple environmental stressors is a common occurrence that can affect organisms in predictable or unpredictable ways.Hypoxia and turbidity in aquatic environments are 2 stressors that can affect reproductive behaviors by altering energy availability and the visual environment,respectively.Here we examine the relative effects of population and the rearing environment(oxygen concentration and turbidity)on reproductive behaviors.We reared cichlid fish(the Egyptian mouthbrooder,Pseudocrenilabrus multicolor)from 2 populations(a swamp and river)until sexual maturity,in a full factorial design(hypoxic/normoxic×clear/turbid)and then quantified male competitive and courtship behaviors and female preference under their respective rearing conditions.Overall,we found that the rearing environment was more important than population for determining behavior,indicating there were few heritable differences in reproductive behavior between the 2 populations.Unexpectedly,males in the hypoxic rearing treatment performed more competitive and courtship behaviors.Under turbid conditions,males performed fewer competitive and courtship behaviors.We predicted that females would prefer males from their own population.However,under the hypoxic and turbid combination females from both populations preferred males from the other population.Our results suggest that reproductive behaviors are affected by interactions among male traits,female preferences,and environmental conditions.

关 键 词：CICHLID COMPETITION HYPOXIA mate choice TURBIDITY 

分 类 号：Q95[生物学—动物学]