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The Golden Apple Snail Pomacea canaliculata: From Zygotes to Stable Mutant Lines

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What can be learnt from a snail?

Kerstin Johannesson¹

¹Department of Marine Sciences - Tjärnö University of Gothenburg Strömstad Sweden.

Evolutionary Applications

|April 19, 2016

Summary

This summary is machine-generated.

The marine snail Littorina saxatilis exhibits distinct ecotypes adapted to different shore conditions, demonstrating parallel speciation. Research investigates the genetic and ecological factors driving reproductive isolation in these snails.

Keywords:

Littorina saxatilis ecotypes parallel evolution primary hybrid zones speciation with gene flow

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Area of Science:

Marine Biology
Evolutionary Biology
Speciation Research

Background:

Littorina saxatilis, a marine snail from the North Atlantic, displays significant polymorphism.
Reproductively isolated ecotypes form in microhabitats with varying crab presence and wave action.
Decades of research highlight inherited phenotypic differences, strong selection, and restricted gene flow.

Purpose of the Study:

Investigate the mechanisms of microevolution and barrier formation to gene flow.
Understand the molecular and ecological components of speciation in L. saxatilis.
Utilize a replicated system for studying speciation across local to pan-European scales.

Main Methods:

Ecological and demographic studies of ecotype formation.
Analysis of inherited phenotypic differences and selection pressures.
Genomic approaches, modeling, and experiments integrating molecular and ecological data.

Main Results:

Evidence of strong differential selection and assortative mating, including female size preference.
Parallel and replicated divergence of ecotypes across independent locations.
Identification of key factors contributing to reproductive isolation and speciation.

Conclusions:

L. saxatilis provides a powerful model for studying microevolution and speciation.
Interactions between molecular and ecological factors drive speciation.
Ongoing research with a reference genome aims to further elucidate speciation mechanisms.