Genetic structure of Echinolittorina lineolata (Mollusca:Gastropoda) populations in São Paulo

Author(s)

Priscila Madi Salloum

• Document type: Master's Dissertation
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia
• Defense date: 2015-01-16

Examining board members

Vera Nisaka Solferini; Sthefane D Ávila; Marcos Roberto Dias Batista

• Advisor: Vera Nisaka Solferini

Abstract

The genetic structure of marine populations can be evaluated by two modes: spatial and temporal. In this environment, different factors work as barriers to gene flow for different species, although animals with high dispersal ability are expected to present panmitic populations along their range. Echinolittorina lineolata (D¿Orbigny 1840) is a common gastropod on the Brazilian coast and has larvae with high dispersal ability, being an interesting model to evaluate genetic structure in the marine environment. This work used spatial and temporal approaches to evaluate the genetic variability and population structure of E lineolata in two beaches of the São Paulo state. Four collections of juveniles were done in 40-days intervals; three regions of the mitochondrial DNA were used as molecular markers: two from cytochrome-b gene (Cyt-b) and one from cytochrome oxidase I gene (CO-1). The haplotype and nucleotide diversity indexes were low, similar to other species. Haplotype networks, analyses of molecular variance and FST statistics indicated genetic structure among the two beaches¿ samples (spatial) and among the four collections¿ samples (temporal). Two factors were considered as likely drivers of the observed genetic structure on these juveniles: local geographic or oceanographic variations and variance in the reproductive success (AU)

• FAPESP's process: 12/05938-4 - Temporal genetic structure in Echinolittorina lineolata (Gastropoda: Littorinidae)
• Grantee: Priscila Madi Salloum
• Support Opportunities: Scholarships in Brazil - Master