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Spatial genetic structure and body size divergence in endangered Gymnogobius isaza in ancient Lake Biwa

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dc.contributor National Cheng Kung University
dc.contributor Lake Biwa Environm Res Inst
dc.contributor Australian Inst Marine Sci
dc.contributor Ritsumeikan University
dc.contributor Australian Institute Of Marine Science
dc.contributor Research Institute For Humanity & Nature (rihn)
dc.contributor Ristumeikan Univ
dc.contributor Dept Marine Biotechnol & Resources
dc.contributor Fac Life Sci
dc.contributor Natl Cheng Kung Univ
dc.contributor Natl Sun Yat Sen Univ
dc.contributor National Sun Yat Sen University
dc.contributor Sch Marine & Trop Biol
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Res Inst Humanity & Nat
dc.contributor Dept Life Sci
dc.contributor.author OKUDA, NOBORU
dc.contributor.author NAKAZAWA, TAKEFUMI
dc.contributor.author LIU, SHANG-YIN VANSON
dc.contributor.author SAKAI, YOICHIRO
dc.contributor.author ARAKI, KIWAKO S.
dc.contributor.author TSAI, CHENG-HAN
dc.date.accessioned 2018-08-05T19:15:58Z
dc.date.accessioned 2018-08-05T19:15:58Z
dc.date.accessioned 2018-11-01T03:04:37Z
dc.date.available 2018-08-05T19:15:58Z
dc.date.available 2018-08-05T19:15:58Z
dc.date.available 2018-11-01T03:04:37Z
dc.date.issued 2018-01-01
dc.identifier.citation Nakazawa T, Liu SYV, Sakai Y, Araki KS, Tsai CH, Okuda N (2018) Spatial genetic structure and body size divergence in endangered Gymnogobius isaza in ancient Lake Biwa. MITOCHONDRIAL DNA PART A - vol 29 - pages 756-764
dc.identifier.issn 2470-1394
dc.identifier.uri http://epubs.aims.gov.au/11068/14719
dc.description.abstract Gymnogobius isaza is a freshwater goby endemic to ancient Lake Biwa, the largest lake in Japan. The species is now listed as 'Critically Endangered' in the Red Data Book of Japan. Nevertheless, it remains subject to fishing without any specific management strategies. Previous studies using mitochondria) DNA markers showed that this fish species has two cryptic lineages. However, little is known about spatial genetic structure and ecological differences across the broad lakescape. In this study, we collected fish samples at nine locations along the lakeshore during the breeding season and tested for the presence of spatial heterogeneity in the lineage's composition while measuring body size as the most fundamental biological trait. The results showed that the major lineage dominated all the sampling locations whereas the minor lineage consisted of only 11% (16/143) of samples. Furthermore, although their spatial distributions overlapped (i.e. the two lineages may be well mixed), we found it possible that the minor lineage may have a potentially narrower distribution than the major lineage. In addition, we found that the two lineages differ in body size; specifically, the minor lineage is smaller in size. From the viewpoint of genetic diversity conservation and sustainable resource use, this fish should be managed as two genetic stocks and spatial and/or body size-based fishery management is desirable, with particular attention to the minor (smaller sized) lineage.
dc.description.sponsorship This work was supported by the Ministry of Science and Technology, Taiwan (104-2621-B-006-003-MY3 and 104-2611-M-110-022-MY2, respectively).
dc.language English
dc.subject Ecosystem
dc.subject Genetic Stock
dc.subject Conservation
dc.subject Diversity
dc.subject Population-structure
dc.subject Great-lakes
dc.subject Chinook Salmon
dc.subject Speciation
dc.subject Phenotypic Variation
dc.subject Water-system
dc.subject Endangered Species
dc.subject River-basin
dc.subject Stock Identification
dc.subject Mitochondrial Dna Markers
dc.subject Genetics & Heredity
dc.title Spatial genetic structure and body size divergence in endangered Gymnogobius isaza in ancient Lake Biwa
dc.type journal article
dc.identifier.doi 10.1080/24701394.2017.1357708
dc.identifier.wos WOS:000438996900012


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