Genetic population structure and low genetic diversity in the over-exploited sea cucumber Holothuria edulis Lesson, 1830 (Echinodermata: Holothuroidea) in Okinawa Island

Understanding genetic connectivity is fundamental for ecosystem-based management of marine resources. Here we investigate the metapopulation structure of the edible sea cucumber Holothuria edulis Lesson, 1830 across Okinawa Island, Japan. This species is of economic and ecological importance and is...

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Bibliographic Details
Published in:Conservation genetics 2016-08, Vol.17 (4), p.811-821
Main Authors: Soliman, Taha, Iria Fernandez-Silva, James Davis Reimer
Format: Article
Language:English
Subjects:
Animal Genetics and Genomics
Animal populations
aquatic organisms
asexual reproduction
Biodiversity
Biomedical and Life Sciences
Coastal development
coasts
Conservation Biology/Ecology
cytochrome-c oxidase
Echinodermata
Ecology
Ecosystem degradation
Ecosystem management
ecosystems
Evolutionary Biology
Genetic diversity
genetic variation
haplotypes
heterozygosity
histones
Holothuria
Holothuria edulis
Holothurioidea
Holothuroidea
Invertebrates
Life Sciences
Marine
Marine ecosystems
Marine organisms
Marine resources
Marine resources management
Metapopulations
Mitochondrial DNA
Plant Genetics and Genomics
Population genetics
Population structure
Research Article
ribosomal RNA
sequence diversity
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Summary:Understanding genetic connectivity is fundamental for ecosystem-based management of marine resources. Here we investigate the metapopulation structure of the edible sea cucumber Holothuria edulis Lesson, 1830 across Okinawa Island, Japan. This species is of economic and ecological importance and is distributed from the Red Sea to Hawai‘i. We examined sequence variation in fragments of mitochondrial cytochrome oxidase subunit I (COI) and 16S ribosomal RNA (16S), and nuclear histone (H3) at six locations across Okinawa Island. We found higher haplotype diversity for mtDNA (COI: Hd = 0.69 and 16S: Hd = 0.67) and higher heterozygosity of nDNA (H3: H E = 0.39) in populations from the west coast of Okinawa compared to individuals from populations on the east coast (COI: Hd = 0.40; 16S: Hd = 0.21; H3: H E = 0.14). Overall population structure was significant (AMOVA results for COI: Φ ST = 0.49, P 
ISSN:1566-0621
1572-9737
DOI:10.1007/s10592-016-0823-8