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ASSESSING THE TEMPORAL ISOLATION BARRIER BETWEEN TWO CLOSELY RELATED SPECIES OF THE GENUS FISSURELLA OFF THE SOUTHWESTERN COAST OF SOUTH AMERICA

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dc.creatorGONZALO ANDRÉS COLLADO INZULZA
dc.date2024
dc.date.accessioned2025-01-10T15:50:38Z
dc.date.available2025-01-10T15:50:38Z
dc.date.issued2024
dc.description.abstractKNOWLEDGE OF THE REPRODUCTIVE ISOLATION MECHANISMS THAT PREVENT GENE FLOW BETWEEN SPECIES IS ESSENTIAL FOR UNDERSTANDING THE PROCESS OF SPECIATION. IN THIS STUDY, I INVESTIGATE THE SPAWNING PERIODS IN FISSURELLA CUMINGI AND F. LATIMARGINATA, TWO CLOSELY RELATED SYMPATRIC SPECIES OF KEYHOLE LIMPETS WITH EXTERNAL FERTILIZATION, AS A POTENTIAL PREZYGOTIC BARRIER BETWEEN THEM. THE REPRODUCTIVE CYCLE WAS ASSESSED IN TWO DISTINCT LOCATIONS IN NORTHERN CHILE USING THE GONADOSOMATIC INDEX (GSI) AND GONADAL HISTOLOGY. SPECIES, LOCALITY, AND SEX WERE DESIGNATED AS PREDICTIVE VARIABLES, WHILE AVERAGE GSI VALUES, AS WELL AS THOSE OF PARTIAL AND TOTAL SPAWNING, WERE CONSIDERED DEPENDENT VARIABLES. BOTH SPECIES EXHIBIT A CONTINUOUS GAMETOGENIC CYCLE THROUGHOUT THE YEAR, CHARACTERIZED BY MULTIPLE SPAWNING EVENTS. A GENERALIZED LINEAR MODEL (GLM) FACTORIAL ANOVA DESIGN REVEALED THAT NEITHER SPECIES, LOCALITY NOR SEX WERE SIGNIFICANT FACTORS WITH RESPECT TO THE GSI AND PARTIAL SPAWNING SCORES. HOWEVER, SEX WAS FOUND TO BE THE ONLY SIGNIFICANT FACTOR RELATED TO TOTAL SPAWNING. NO SIGNIFICANT INTERACTIONS WERE OBSERVED AMONG PREDICTIVE FACTORS. THESE FINDINGS SUGGEST THAT REPRODUCTIVE PERIODS MAY NOT SERVE AS EFFECTIVE BARRIERS TO GAMETE ENCOUNTERS BETWEEN SPECIES. OUR STUDY PROMPTS QUESTIONS ABOUT HOW CLOSELY-RELATED EXTERNALLY-FERTILIZING SPECIES MAINTAIN REPRODUCTIVE ISOLATION.
dc.formatapplication/pdf
dc.identifier.doi10.1080/07924259.2024.2360458
dc.identifier.issn2157-0272
dc.identifier.issn0792-4259
dc.identifier.urihttps://repositorio.ubiobio.cl/handle/123456789/13911
dc.languagespa
dc.publisherINVERTEBRATE REPRODUCTION & DEVELOPMENT
dc.relation.uri10.1080/07924259.2024.2360458
dc.rightsPUBLICADA
dc.subjectreproductive isolation
dc.subjectreproductive cycles
dc.subjectproduction
dc.subjectpawning
dc.subjectKey-hole limpetsre
dc.subjectChile
dc.titleASSESSING THE TEMPORAL ISOLATION BARRIER BETWEEN TWO CLOSELY RELATED SPECIES OF THE GENUS FISSURELLA OFF THE SOUTHWESTERN COAST OF SOUTH AMERICA
dc.typeARTÍCULO
dspace.entity.typePublication
ubb.EstadoPUBLICADA
ubb.Otra ReparticionDEPARTAMENTO DE CIENCIAS BASICAS
ubb.SedeCHILLÁN
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