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Loss of largest and oldest individuals of the Montpellier snake correlates with recent warming in the southeastern Iberian Peninsula

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Current Zoology 2017年第6期63卷 607-613页

作者： Cosme LOPEZ-CALDERON monica feriche Esmeralda ALAMINOS Juan M. PLEGUEZUELOS Department of Zoology Faculty of Biology University of Seville C/Reina Mercedes Seville E-41012 Spain Department of Zoology Faculty of Sciences University of Granada Granada E-18071 Spain

The effects of climate change on organisms are now being extensively studied in many different taxa. However, the variation in body size, usually shrinkage in response to increasing temperature, has received little attention regarding to reptiles. During past periods of global warming, many organisms shrank in size, and current evidence and experiments manipulating temperature have shown a biomass decrease in some organisms with increasing temperatures. Here we test whether the body size of the Montpellier snake Malpolon rnonspessulanus from the southeastern Iberian Peninsula is changing and correlated with the increasing temperature in this region during a 39- year period （1976-2014）. We measured the snout-vent length （SVL） of vouchers in scientific collections to check for trends in adult body size at the population level in relation with temperature, while controlling for the age of the individuals （estimated by skeletochronology, n =141）. Given the great ontogenetic variation in body size of the study species, we categorized age in 3 classes：＂young adults＂（under 5 years old）, ＂intermediate adults＂（from 5 to 7 years old）, and ＂old adults＂（from 8 to 14 years old）. By means of linear mixed models, we found a negative relationship between SVL of ＂old adults＂ and average annual temperature in the region during the lifetime of each individual. Our results indicate that largest and oldest individuals of the Montpellier Snake, that is, males because of strong sexual size dimorphism in this species, disappeared from the study population, and suggest that it occurred in response to rising environmental temperature.

关键词： body shrinkage climate warming differential mortality Malpolon monspessulanus skeletochronology snakes Spain.

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

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Current Zoology 2020年第4期66卷 363-371页

作者： Elba MoNTES monica feriche Leticia Ruiz-SUEIRo Esmeralda ALAMINos Juan M.Pleguezuelos Department of Zoology Faculty of Biological SciencesUniversity of Valenciac/Dr.Moliner50BurjassotValencia E-46100Spain Department of Zoology Faculty of SciencesGranada UniversityGranada E-18071Spain Laboratory of Ecology and Evolution Butantan InstituteUniversity of Sao PauloAv.Vital Brazil1.500ButantaE-05503900Sao PauloBrasil Department of Sciences Granada Sciences ParkGranadaSpain*Address correspondence to Elba Montes

Knowing the causes of biological invasion success can be relevant to combat future invasive *** 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 *** study compares the basic reproductive traits of mainland native and invasive populations of the *** 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 *** 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 *** of these results must reflect the environmental differences in the recently invaded island with respect to the source area,and overall plasticity of reproductive *** is evolutionarily interesting,and may aid the succesful growth of this species in their invasiveness of Mediterranean islands like *** most significant finding is that this expression of phenotypic plasticity occurred rapidly in this invasive population,within a period of 14 years *** 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

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