Reproduction ecology of the recently invasive snake Hemorrhois hippocrepis on the island of Ilbiza Elba  

作　　者：Elba MoNTES Monica FERICHE Leticia Ruiz-SUEIRo Esmeralda ALAMINos Juan M.Pleguezuelos 

机构地区：[1]Department of Zoology,Faculty of Biological Sciences,University of Valencia,c/Dr.Moliner,50,Burjassot,Valencia E-46100,Spain [2]Department of Zoology,Faculty of Sciences,Granada University,Granada E-18071,Spain [3]Laboratory of Ecology and Evolution,Butantan Institute,University of Sao Paulo,Av.Vital Brazil,1.500,Butanta,E-05503900,Sao Paulo,Brasil [4]Department of Sciences,Granada Sciences Park,Granada,Spain*Address correspondence to Elba Montes

出　　处：《Current Zoology》2020年第4期363-371,共9页动物学报（英文版）

基　　金：the Consell Insular d'Eivissa,Govern de les Illes Balears[grant numbers 54/2013 and 21/2015—AGRICULTURA].

摘　　要：Knowing the causes of biological invasion success can be relevant to combat future invasive processes.The recent invasion of the horseshoe whip snake Hemorrhois hippocrepis on the island of Ibiza provides the opportunity to compare natural history traits between invasive and source populations,and to unravel what makes this snake a successful invader that is threatening the only endemic vertebrate of the island,Podarcis pityusensis.This study compares the basic reproductive traits of mainland native and invasive populations of the snake.Our results revealed that invasive populations were characterized by female maturity at a smaller size,extended reproductive period,and much lower reproduction frequency compared to the native population.In contrast,some major reproductive traits--the abdominal fat body cycle,clutch size,hatchling body size,and hatchling body condition,did not differ between the two populations.Some of these results must reflect the environmental differences in the recently invaded island with respect to the source area,and overall plasticity of reproductive traits.Plasticity is evolutionarily interesting,and may aid the succesful growth of this species in their invasiveness of Mediterranean islands like Ibiza.The most significant finding is that this expression of phenotypic plasticity occurred rapidly in this invasive population,within a period of 14 years maximum.Our results on the reproduction ecology of the invasive population were not conclusive regarding the factors determining the invasiveness of the snake and pointed to alternative causes.

关 键 词：lbiza invasion sucess ISLANDS reproduction frequency.snakes 

分 类 号：Q95[生物学—动物学]