Feeding on clean food?Potential effects of electric organ discharges by Torpedo spp.(Torpediniformes:Torpedinidae)on their trophically transmitted parasites  

作　　者：Jaime PENADÉS-SUAY Tania REGACHO Francisco Javier AZNAR 

机构地区：[1]Marine Zoology Unit,Cavanilles Institute of Biodiversity and Evolutionary BiologyUniversity of Valencia,València,Spain [2]LAMNA Association for the study of elasmobranchs from the Valencian Community,València,Spain

出　　处：《Integrative Zoology》2022年第2期234-245,共12页整合动物学（英文版）

摘　　要：Members of the Torpedinidae(torpedoes)and Hypnidae(coffin ray)use electric organ discharges(EOD)to stun or kill their prey before consumption.We investigated whether EOD could also negatively affect the helminth larvae infecting these preys through a surrogate model:we applied electric discharges to individuals of blue whiting,Micromesistius poutassou,that harbored live larvae of Anisakis.Larval mortality throughout a 6-h period was significantly higher in the treatment group,suggesting that EODs could significantly hamper helminth recruitment.We then tested whether torpedinids and hypnids(“strong-EOD”families)harbored species-poor helminth(cestode)assemblages compared with“weak-EOD”Torpediniformes(Narcidae and Narkidae)and other Batoidea.Based on comparisons on estimated species diversity and mean species richness of tapeworms at host individual level we found that(i)Torpediniformes had the lowest tapeworm diversity of all Batoidea orders;(ii)Torpedo spp.consistently had the lowest mean cestode richness at host individual level,and this could not be related to other host factors influencing cestode diversity in chondrichthyans,that is body size,trophic level or dietary breath.However,a preliminary comparison between“strong-EOD”and“weak-EOD”Torpediniformes did not detect clear differences of cestode richness.Thus,evidence supporting an unambiguous contribution of EODs to depauperate cestode assemblages requires further research.

关 键 词：ANISAKIS Batoidea CESTODE EOD behavior Torpediniform TORPEDO 

分 类 号：Q95[生物学—动物学]