Sex-dependent increase of movement activity in the freshwater isopod Asellus aquaticus following adaptation to a predator-free cave habitat  

作　　者：ELTE Eötvös Loránd University Hajriz Berisha Gergely Horváth Žiga Fišer Gergely Balázs Cene Fišer Gábor Herczeg Author Notes 

机构地区：[1]Behavioural Ecology Group,Department of Systematic Zoology and Ecology,Biological Institute,ELTE Eötvös Loránd University,Pázmány Péter sétány 1/C,Budapest,Hungary H-1117 [2]ELKH-ELTE-MTM Integrative Ecology Research Group,Pázmány Péter sétány 1/C,Budapest,Hungary H-1117 [3]Department of Biology,Biotechnical Faculty,University of Ljubljana,Jamnikarjeva 101,1000 Ljubljana,Slovenia

出　　处：《Current Zoology》2023年第4期418-425,共8页动物学报（英文版）

基　　金：The research was supported by the joint Hungarian—Slovenian grant for international cooperation(Hungarian National Research,Development and Innovation Office(NRDIO):SNN-125627);Slovenian Research Agency grants N1-0069 and P1-0184;NRDIO postdoctoral grant PD-132041(GeH);and theúNKP-20-4 New National Excellence Program of the Ministry of Innovation and Technology from the source of the NRDIO(GB).

摘　　要：Populations experiencing negligible predation pressure are expected to evolve higher behavioral activity.However,when sexes have different expected benefits from high activity,the adaptive shift is expected to be sex-specific.Here,we compared movement activity of one cave(lack of predation)and three adjacent surface(high and diverse predation)populations of Asellus aquaticus,a freshwater isopod known for its independent colonization of several caves across Europe.We predicted 1)higher activity in cave than in surface populations,with 2)the difference being more pronounced in males as they are known for active mate searching behavior,while females are not.Activity was assessed both in the presence and absence of light.Our results supported both predictions:movement activity was higher in the cave than in the surface populations,particularly in males.Relaxed predation pressure in the cave-adapted population is most likely the main selective factor behind increased behavioral activity,but we also showed that the extent of increase is sex-specific.

关 键 词：ADAPTATION cave colonization movement activity predator-free environment 

分 类 号：Q958[生物学—动物学]