Sympatric speciation by allochrony in a seabird.

Sympatric speciation by allochrony in a seabird. Research Abstract Details 

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Sympatric speciation by allochrony in a seabird. Abstract Text:

V L Friesen,A L Smith,E ,M Bolton,R W Furness,J ,L R Monteiro,V L Friesen,A L Smith,E ,M Bolton,R W Furness,J ,L R Monteiro,

The importance of sympatric speciation (the evolution of reproductive isolation between codistributed populations) in generating biodiversity is highly controversial. Whereas potential examples of sympatric speciation exist for plants, insects, and fishes, most theoretical models suggest that it requires conditions that are probably not common in nature, and only two possible cases have been described for tetrapods. One mechanism by which it could occur is through allochronic isolation-separation of populations by breeding time. Oceanodroma castro (the Madeiran or band-rumped storm-petrel) is a small seabird that nests on tropical and subtropical islands throughout the Atlantic and Pacific Oceans. In at least five archipelagos, different individuals breed on the same islands in different seasons. We compared variation in five microsatellite loci and the mitochondrial control region among 562 O. castro from throughout the species' range. We found that sympatric seasonal populations differ genetically within all five archipelagos and have ceased to exchange genes in two. Population and gene trees all indicate that seasonal populations within four of the archipelagos are more closely related to each other than to populations from the same season from other archipelagos; divergence of the fifth sympatric pair is too ancient for reliable inference. Thus, seasonal populations appear to have arisen sympatrically at least four times. This is the first evidence for sympatric speciation by allochrony in a tetrapod, and adds to growing indications that population differentiation and speciation can occur without geographic barriers to gene flow.

Sympatric speciation by allochrony in a seabird. Publishing Authors By Initials

VL Friesen,AL Smith,E ,M Bolton,RW Furness,J ,LR Monteiro,VL Friesen,AL Smith,E ,M Bolton,RW Furness,J ,LR Monteiro,

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Sympatric speciation by allochrony in a seabird. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Proceedings of the National Academy of Sciences of

VOLUME: 104

Page Numbers: 18589-94

Journal Abbreviation: Proc. Natl. Acad. Sci. U.S.A.

ISSN: 1091-6490

DAY: 15

MONTH: 11

YEAR: 2007

Sympatric speciation by allochrony in a seabird. Information

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LANGUAGE: eng

NlmUniqueID: 7505876

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Grant and Affiliation Information for Sympatric speciation by allochrony in a seabird.

AFFILIATION: Department of Biology, Queen's University, Kingston, ON, Canada.

Country: United States

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MEDLINETA: Proc Natl Acad Sci U S A

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