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Ecological significance of dorsal polymorphism in a Batesian mimic snake

Current Zoology 2018年第6期64卷 745-753页

作者： Xavier SANTOS Jairo S.AZOR Sergio CORTES Elisa RODRIGUEZ Jose LARIOS Juan M.PLEGUEZUELOS CIBIO/InBIO Centro de Investigacao em Biodiversidade e Recursos Geneticos da Universidade do PortoRua Padre Armando QuintasVairao 4485-661Portugal Departamento de Zoologia Facultad de CienciasUniversidad de GranadaGranada E-18071Spain Ayuntamiento de Motril Plaza de Espana 1Motril E-18600Spain

Batesian mimicry is the process in which harmless species adopt the appearance of a dangerous, aposematic *** some prey species,both Batesian mimetic and non-Batesian morphs coexist,presupposing that both morphs have to be evolutionarily *** viperine snake, Natrix maura,exhibits a zigzag dorsal pattern and antipredatory behavior that mimics European *** snake also has a striped dorsal pattern that coexists with the zigzag *** have examined whether individuals belonging to different geographically structured clades were more likely to exhibit a certain dorsal pattern,and whether the zigzag pattern has a protective function by exposing artificial snakes to predation in natural environments,in addition to comparing antipredatory behavior between zigzag and striped snakes also in natural *** results indicate that the striped pattern was not geographically structured,but *** predators less frequently attacked zigzag plasticine models than striped or unpatterned *** detected a shift in antipredator behavior between the 2 morphs,as Batesian mimicking *** responded to an approaching potential predator by remaining immobile or fleeing at shorter distances than did striped *** conclude that Batesian mimics maintain the cryptic and aposematic value by resembling vipers,whereas in open habitats the non-Batesian mimic has altered its antipredator behavior to maintain its fitness.

关键词： antipredatory strategies aposematism Batesian mimicry crypsis dorsal pattern Natrix maura

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