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REPRODUCTIVE ASPECTS OF THE POORLY KNOWN AND CRITICALLY ENDANGERED FRESHWATER SNAIL HELEOBIA ATACAMENSIS (GASTROPODA: TRUNCATELLOIDEA)

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dc.creatorMOISÉS ALBERTO VALLADARES CORTÉS
dc.creatorGONZALO ANDRÉS COLLADO INZULZA
dc.date2021
dc.date.accessioned2025-01-10T15:23:45Z
dc.date.available2025-01-10T15:23:45Z
dc.date.issued2021
dc.description.abstractKNOWING THE REPRODUCTIVE BIOLOGY OF THREATENED SPECIES IS ESSENTIAL FOR CONSERVATION AND TO ESTABLISH PROPER MANAGEMENT PLANS. HELEOBIA ATACAMENSIS, A FRESHWATER SNAIL ONLY KNOWN FROM TWO LOCATIONS IN THE ATACAMA SALTPAN, NORTHERN CHILE, IS CURRENTLY CLASSIFIED AS DATA DEFICIENT ON THE IUCN RED LIST AND CRITICALLY ENDANGERED BY THE MINISTERIO DEL MEDIO AMBIENTE OF CHILE. BASED ON SIZE-FREQUENCY DISTRIBUTION, MULTIVARIATE ANALYSIS OF SHELL MEASUREMENTS, AND MICRODISSECTIONS, WE STUDIED THE REPRODUCTIVE STRATEGY, RECRUITMENT PERIOD, SEX RATIO AND SEXUAL DIMORPHISM IN THIS SPECIES. HELEOBIA ATACAMENSIS IS AN OVIPAROUS SPECIES, WITH DIRECT DEVELOPMENT (NON-PLANKTOTROPHIC). FEMALES LAY CAPSULES OF A SINGLE EGG FROM WHICH A JUVENILE RESEMBLING A MINIATURE ADULT HATCHES AFTER INTRACAPSULAR METAMORPHOSIS IS COMPLETED. THE DEVELOPMENT TYPE WAS CONFIRMED BY THE OBSERVATION OF A PAUCISPIRAL PROTOCONCH (= PROTOCONCH I) USING SCANNING ELECTRON MICROSCOPY. RECRUITMENT WAS OBSERVED ACROSS THE FOUR SEASONS OF THE YEAR, WITH AN INCREMENT AT THE END OF AUSTRAL SUMMER. RESULTS ALSO SHOWED THAT SEX RATIO WAS 1:1, WHEREAS SEXUAL DIMORPHISM WAS NOT DETECTED USING UNIVARIATE AND MULTIVARIATE ANALYSIS OF THE SHELL. THE REPRODUCTIVE DATA PROVIDED IN THIS STUDY ARE A STARTING POINT FOR FUTURE MANAGEMENT PLANS.
dc.formatapplication/pdf
dc.identifier.doi10.7717/peerj.11550
dc.identifier.issn2167-8359
dc.identifier.issn2167-8359
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/11813
dc.languagespa
dc.publisherPeerJ
dc.relation.uri10.7717/peerj.11550
dc.rightsPUBLICADA
dc.titleREPRODUCTIVE ASPECTS OF THE POORLY KNOWN AND CRITICALLY ENDANGERED FRESHWATER SNAIL HELEOBIA ATACAMENSIS (GASTROPODA: TRUNCATELLOIDEA)
dc.title.alternativeASPECTOS REPRODUCTIVOS DEL CARACOL DE AGUA DULCE POCO CONOCIDO Y EN PELIGRO CRÍTICO HELEOBIA ATACAMENSIS (GASTROPODA: TRUNCATELLOIDEA)
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionRECTORIA
ubb.Otra ReparticionDEPARTAMENTO DE CIENCIAS BASICAS
ubb.SedeCONCEPCIÓN
ubb.SedeCHILLÁN
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