Maintenance of Genetic Diversity of Black Sea Bream despite Unmonitored and Large-Scale Hatchery Releases

被引：5

作者：

Hsu, Te-Hua ^{[1
,2
]}

Lee, Hung-Tai ^{[3
]}

Lu, Hsueh-Jung ^{[3
]}

Liao, Cheng-Hsin ^{[3
]}

Gong, Hong-Yi ^{[1
,2
]}

Huang, Chang-Wen ^{[1
,2
]}

机构：

[1] Natl Taiwan Ocean Univ, Dept Aquaculture, Keelung 20224, Taiwan

[2] Natl Taiwan Ocean Univ, Ctr Excellence Oceans, Keelung 20224, Taiwan

[3] Natl Taiwan Ocean Univ, Dept Environm Biol & Fisheries Sci, Keelung 20224, Taiwan

来源：

BIOLOGY-BASEL | 2022年 / 11卷 / 04期

关键词：

microsatellites; genetic diversity; genetic effect; aquaculture; Sparidae; ACANTHOPAGRUS-SCHLEGELII BLEEKER; STOCK ENHANCEMENT PROGRAM; MULTILOCUS GENOTYPE DATA; HIROSHIMA BAY; POPULATION-STRUCTURE; PAIRWISE RELATEDNESS; MITOCHONDRIAL-DNA; WILD; RESTOCKING; FITNESS;

D O I：

10.3390/biology11040554

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Simple Summary Stock enhancement aggressively replenishes depleted wild finfish populations. However, stock enhancement of black sea bream in Taiwan with complex genetic sources, especially when successful, maintains genetic diversity but dramatically changes the genetic structure within and among wild populations. Stock enhancement, used for replenishing depleted wild finfish populations, is an aggressive approach. Stock enhancement projects in Taiwan involve black sea bream (Acanthopagrus schlegelii), a major commercial species. During 2004-2015, even management agencies conducted stock enhancement projects, leading to numerous private releases that have not been recorded. Stock enhancement by a private hatchery without accurate genetic records may lead to a genetic structure change in wild populations. Using allele frequencies at nine microsatellite loci, we studied the genetic effects of stock enhancement in 19 samples collected from populations in the hatcheries and the wild. In 458 individuals from nine hatchery samples, most populations showed weak but significant genetic differences and complex clusters in structure analysis, indicating dramatic stock change within and among hatcheries. The 10 wild populations (n = 773) also had a complex genetic composition and were genetically different among sampling sites and times. However, a simple and clear cluster in structure analysis was found for only one sampling site, which had no release history. Thus, stock enhancement with complex genetic sources helps maintain genetic diversity but dramatically changes the genetic structure within and among wild populations, especially when stock enhancement is successful.

引用

页数：19

共 58 条

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