菲律宾背足熊(Arctodiaptomus dorsalis, Marsh, 1907)(桡足目:Calanoida:背足熊科)连通性、遗传多样性和种群结构的研究

IF 1.2 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Journal of Crustacean Biology Pub Date : 2023-11-28 DOI:10.1093/jcbiol/ruad070
Shea K P Guinto, Ryuji J Machida, Rey D S Papa
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引用次数: 0

摘要

淡水类鱿鱼类桡足动物Arctodiaptomus dorsalis (Marsh, 1907)于2001年在菲律宾的Laguna de bay首次被记录,由于在菲律宾调查的32个湖泊和河流中有23个存在,桡足动物于2021年获得了“入侵物种”的地位。摘要从吕宋岛7个居群的107个dorsalis个体中提取了基因组DNA,以收集该物种的种群结构、遗传连系和活动范围扩展等信息。利用ITS1和ITS2核间隔序列的720 bp片段分析了群体的遗传结构。高单倍型多样性(Hd = 0.7951)、低核苷酸多样性(π = 0.0024)和群体间的低遗传距离表明高水平的基因流动和低水平的隔离。12个单倍型中有6个是特定位点特有的,但这3个共有的单倍型表明种群间存在泛型。Tajima的D (D = 0.4945)和Fu的F (F = -2.8950)表明,在瓶颈之后,种群规模最近有所增加。这可能是由于桡足类动物在1905年之后通过观赏鱼贸易被引入菲律宾,最终通过一次或多次水产养殖介导的引入事件扩展到附近的内陆水域。自1972年以来,拉古纳德湾作为罗非鱼鱼种(Oreochromis niloticus (Linnaeus, 1758))的主要来源,将其释放到菲律宾的各个湖泊中,为这一设想提供了间接支持。
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Insights on the connectivity, genetic diversity, and population structure of Arctodiaptomus dorsalis (Marsh, 1907) (Copepoda: Calanoida: Diaptomidae) in the Philippines
The freshwater calanoid copepod Arctodiaptomus dorsalis (Marsh, 1907) was first recorded from the Philippines in 2001 in Laguna de BayThe copepod gained the status of “invasive species” in 2021 due to its presence in 23 of 32 surveyed Philippine lakes and rivers. Genomic DNA was extracted from 107 individuals of A. dorsalis, representing seven populations on the island of Luzon to gather information on the population structure, genetic connectivity, and range expansion of the species.. A 720-bp fragment of the nuclear ITS1 and ITS2 spacers was used to analyze the genetic structure of the populations. High haplotype diversity (Hd = 0.7951), low nucleotide diversity (π = 0.0024), and low genetic distance between populations indicate high levels of gene flow and low levels of isolation. Six of the 12 haplotypes were unique to particular sites, but the three shared haplotypes suggest panmixia among populations. Tajima’s D (D = 0.4945) and Fu’s F (F = -2.8950) suggest a recent increase in population size following a bottleneck. This may have occurred as the result of the copepod’s suspected initial introduction into the Philippines after 1905 via the trade in ornamental aquarium fish, eventually followed by its expansion into nearby inland waters through one or more aquaculture-mediated introduction events. Laguna de Bay’s role since 1972 as the main source of tilapia fingerlings (Oreochromis niloticus (Linnaeus, 1758)) for release into various Philippine lakes provides circumstantial support for this scenario.
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来源期刊
Journal of Crustacean Biology
Journal of Crustacean Biology 生物-海洋与淡水生物学
CiteScore
2.10
自引率
9.10%
发文量
66
审稿时长
6-12 weeks
期刊介绍: The Journal of Crustacean Biology is the official journal of The Crustacean Society, publishing peer-reviewed research on all aspects of crustacean biology and other marine arthropods. Papers are published in English only, but abstracts or summaries in French, German, Portuguese, or Spanish may be added when appropriate.
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