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The disruption of habitat isolation among three Hexagrammos species by artificial habitat alterations that create mosaic-habitat

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Title: The disruption of habitat isolation among three Hexagrammos species by artificial habitat alterations that create mosaic-habitat
Authors: Kimura, Motoko R. Browse this author
Munehara, Hiroyuki Browse this author
Keywords: Coastal fish
Breakwater
Human disturbance
Hybridization
Microhabitat use
Issue Date: Jan-2010
Publisher: Springer Japan
Journal Title: Ecological Research
Volume: 25
Issue: 1
Start Page: 41
End Page: 50
Publisher DOI: 10.1007/s11284-009-0624-3
Abstract: In coastal areas in Japan, three species of greenling (Hexagrammos spp.) can hybridize. In a natural reef setting we showed that Hexagrammos agrammus and H. octogrammus established their breeding territories in a shallow area where seaweed was abundant, whereas H. otakii established breeding territories in a deep area that was sparsely covered with seaweed. This difference in habitat use resulted in H. otakii being distributed separately from the other two species, thereby reducing the potential for hybridization. However, all the three species co-occurred in an artificial area near a breakwater. This area is characterized by steep slopes and complex stacked concrete structures, which create a mosaic-habitat consisting of a shallow environment with seaweed and a deep environment with sparse seaweed, allowing the three species to breed within a single area. Our results suggest that man-made structures can create an artificial mosaic-habitat that can disrupt habitat isolation and promote hybridization between species.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/42621
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 木村 幹子

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