Prezygotic barriers to hybridization in marine broadcast spawners: reproductive timing and mating system variation.

PloS One
Carla A MonteiroGareth A Pearson

Abstract

Sympatric assemblages of congeners with incomplete reproductive barriers offer the opportunity to study the roles that ecological and non-ecological factors play in reproductive isolation. While interspecific asynchrony in gamete release and gametic incompatibility are known prezygotic barriers to hybridization, the role of mating system variation has been emphasized in plants. Reproductive isolation between the sibling brown algal species Fucus spiralis, Fucus guiryi (selfing hermaphrodite) and Fucus vesiculosus (dioecious) was studied because they form hybrids in parapatry in the rocky intertidal zone, maintain species integrity over a broad geographic range, and have contrasting mating systems. We compared reproductive synchrony (spawning overlap) between the three species at several temporal scales (yearly/seasonal, semilunar/tidal, and hourly during single tides). Interspecific patterns of egg release were coincident at seasonal (single peak in spring to early summer) to semilunar timescales. Synthesis of available data indicated that spawning is controlled by semidiurnal tidal and daily light-dark cues, and not directly by semilunar cycles. Importantly, interspecific shifts in timing detected at the hourly scale during si...Continue Reading

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Citations

Feb 20, 2014·Mammalian Genome : Official Journal of the International Mammalian Genome Society·David H KassPriscilla K Tucker
May 3, 2013·BMC Genomics·Maria João F MartinsGareth A Pearson
Sep 3, 2020·PeerJ·Julia Van EttenDebashish Bhattacharya
Dec 11, 2020·Journal of Evolutionary Biology·Joel B CorushBenjamin P Keck

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