Morphological classification of ichthyoplankton in the Changjiang River Estuary based on DNA barcoding
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摘要: DNA条形码技术是利用一段较短的DNA序列实现快速准确物种鉴定的工具。本研究采用传统形态学和DNA条形码技术相结合,对长江口及其邻近水域的鱼类浮游生物种类进行准确鉴定,并对部分种类仔稚鱼进行了形态学描述。结果表明:2016年春、夏季和2017年夏季共获得鱼类浮游生物55种,隶属9目19科。其中鲈形目种类数最多,为35种。鱼类浮游生物在类群上季节变化不明显,但在种类上有明显的季节变化。仅有凤鲚(Coilia mystus)、日本鳀(Engraulis japonius)和小黄鱼(Larimichthys polyactis)在春、夏季同时出现。首次描述了龙头鱼(Harpadon nehereus)仔、稚鱼阶段的形态特征;对龙头鱼、前鳞龟鰉(Chelon affinis)、四指马鲅(Eleutheronema tetradactylum)、少鳞鱚(Sillago japonica)和日本须鳎(Paraplagusia japonica)这5种仔、稚鱼的可量性状、鳍的发育、黑色素的分布等情况进行了描述,绘制了仔、稚鱼形态图。以上研究可为河口鱼类育幼场的研究提供科学依据,也为鱼类早期发育阶段分类资料的积累探索新途径。Abstract: DNA barcoding technology is a tool for rapid and accurate species identification using short orthologous DNA sequence. In this study, both traditional morphology and DNA barcoding technology was used to accurately identify ichthyoplankton species in the Changjiang River Estuary and its adjacent waters. Morphological description was carried out at the same time. The results showed that in spring and summer of 2016 and summer of 2017, 55 species of ichthyoplankton were obtained, belonging to 9 orders and 19 families. Among them, there were 35 species of Perciformes at most. The seasonal variation of ichthyoplankton in fish group was not obvious, while there was significant seasonal variation in species. Only Coilia mystus, Engraulis japonius and Larimichthys polyactis appeared both in spring and summer. It was the first time to describe the morphological characteristics of Harpadon nehereus larva and juvenile. In addition, the quantifiable characters, fin development and melanin distribution of larvae and juvenile of Harpadon nehereus, Chelon affinis, Eleutheronema tetradactylum, Sillago japonica and Paraplagusia japonica, were described and drew. The research could provide a scientific basis for the study of fish nursery in estuaries, and also provide a new way for the accumulation of taxonomic data in the early stage of fish development.
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Key words:
- Changjiang River Estuary /
- fish eggs and larvae /
- morphology /
- DNA barcoding
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表 1 长江口鱼类浮游生物种名录(2016年春季(5月)、夏季(8月)和2017年夏季(8月))
Tab. 1 List of ichthyoplankton species of Changjiang River Estuary(spring (May), summer (August) 2016 and summer (August) 2017)
类群 中文名 拉丁名 样品数 Genbank登录号 引用序列 2016年5月 2016年8月 2017年8月 鳗鲡目 海鳗 Muraenesox cinereus 2 MW402970−MW402971 HM068279,HM068292 − − + 鲱形目 凤鲚 Coilia mystus 12 MW389037−MW389048 JX534238,KF951600 + + + 鲱形目 日本鳀 Engraulis japonius 8 MW389049−MW389056 KF765500AP017957 + + + 鲱形目 黄鲫 Setipinna taty 5 MW401817−MW401821 KC439458 − − + 鲱形目 康氏侧带小公鱼 Stolephorus commersonnii 10 MW401803−MW401812 KM236093,KM236094,KM236095 − + + 鲤形目 鲢鱼 Hypophthalmichthys molitrix 1 MW401813 HM776359 + − − 鲤形目 青鱼 Mylopharyngodon piceus 2 MW401814−MW401815 HQ236003 + − − 鲤形目 鳊 Parabramis peknensis 1 MW402946 KF857485 + − − 鲤形目 寡鳞飘鱼 Pseudolaubuca engraulis 22 MW389006−MW389027 KC429670 − + + 鲤形目 银飘鱼 Pseudolaubuca sinensis 1 MW402945 KY471356,KR862140 − + − 鲤形目 飘鱼属 Pseudolaubuca sp. 1 − − − + − 仙女鱼目 龙头鱼 Harpadon nehereus 13 MW402947−MW402959 JX534239,KP112261 − + + 鲻形目 前鳞龟鰉 Chelon affinis 4 MW402960−MW402963 JF911709 + − − 鲻形目 龟鰉 Chelon haematocheilus 6 MW402964−MW402969 KJ622047 + − − 鲉形目 虎鲉 Minous monodactylus 1 MW388799 EU595221,KP330538 − − + 鲉形目 鲬 Platycephalus indicus 1 MW388798 HM180794 + − − 鲈形目 中国花鲈 Lateolabrax maculatus 3 MW402972−MW402974 EF143385 + − − 鲈形目 鳜 Siniperca chuatsi 1 MW402975 KU049658 + − − 鲈形目 少鳞鱚 Sillago japonica 3 MW388965−MW388967 AP017438HM180882 − − + 鲈形目 四指马鲅 Eleutheronema tetradactylum 4 MW388968−MW388971 KC878730 − + + 鲈形目 棘头梅童鱼 Collichthys lucidus 13 MW388972−MW388984 JN857362 − + + 鲈形目 梅童鱼属 Collichthys sp. 1 − − − + − 鲈形目 皮氏叫姑鱼 Johnius belangerii 4 MW388985−MW388988 KU754054 − + + 鲈形目 叫姑鱼 Johnius grypotus 1 MW402985 KC491206 − + − 鲈形目 叫姑鱼属 Johnius sp. 1 − − − + − 鲈形目 小黄鱼* Larimichthys polyactis 6 MW403045−MW403050 HM068242,FJ618559,GU586227 + + + 鲈形目 鮸 Miichthys miiuy 2 MW403055−MW403056 EU266377,HM447240 − − + 鲈形目 斜棘鴨属 Repomucenus sp. 5 − − + − − 鲈形目 斑尾刺虾虎鱼 Acanthogobius ommaturus 2 MW403061−MW403062 KM891736 + − − 鲈形目 舟山缰虾虎鱼 Amoya chusanensis 1 MW388861 KC196075 − − + 鲈形目 大弹涂鱼 Boleophthalmus pectinirostris 29 MW388810−MW388838 JN631352,JN033333 − + + 鲈形目 矛尾虾虎鱼 Chaeturichthys stigmatias 1 MW402982 KC495071 + − − 鲈形目 多鳞真颌虾虎鱼 Eugnathogobius polylepis 1 MW388864 MG744345 − − + 鲈形目 睛尾蝌蚪虾虎鱼 Lophiogobius ocellicauda 4 MW403057−MW403060 KC480264 + − − 鲈形目 斑点竿虾虎鱼 Luciogobius guttatus 1 MW402986 KU234481 + − − 鲈形目 阿部氏鲻虾虎鱼 Mugilogobius abei 6 MW403063−MW403068 KF128984 − + + 鲈形目 鲻虾虎鱼属 Mugilogobius sp. 1 − − − − + 鲈形目 拉氏狼牙虾虎鱼 Odontamblyopus lacepedii 22 MW388839−MW388860 KR815520 − + + 鲈形目 大鳍弹涂鱼 Periophthalmus magnuspinnatus 2 MW388862−MW388863 KT284931 − − + 鲈形目 褐吻虾虎鱼 Rhinogobius brunneus 1 MW402981 HQ536456 + − − 鲈形目 髭缟虾虎鱼 Tridentiger barbatus 22 MW388916−MW388937 JX536694 − + + 鲈形目 孔虾虎鱼 Trypauchen vagina 19 MW388865−MW388883 JQ027694 − + + 鲈形目 虾虎鱼科1 − 17 − − − + + 鲈形目 虾虎鱼科2 − 3 − − − + + 鲈形目 虾虎鱼科3 − 1 − − − + − 鲈形目 虾虎鱼科4 − 1 − − − − + 鲈形目 虾虎鱼科5 − 1 − − − + − 鲈形目 带鱼 Trichiurus lepturus 19 MW388778−MW388796 JX477078 − + + 鲈形目 扁鮀鰹 Auxis thazard 1 MW388797 AB105447 − + − 鲽形目 日本拟鳎 Pseudaesopia japonicus 2 MW396779−MW396780 KJ433568 + − − 鲽形目 焦氏舌鳎 Cynoglossus joyneri 11 MW396781−MW396791 KF979127,KU754054,KY008569 − + + 鲽形目 半滑舌鳎 Cynoglossus semilaevis 1 MW388770 DQ116751,EU366230 − + − 鲽形目 日本须鳎 Paraplagusia japonica 1 MW388771 JQ639066 − − + 鲀形目 横纹多纪鲀 Takifugu oblongus 3 MW388774−MW388776 AP009535 − + − 鲀形目 黄鳍多纪鲀 Takifugu xanthopterus 2 MW388772−MW388773 AP009533 + − − 注:−表示该种类未出现; +表示该种类出现;小黄鱼*为黑鳃梅童鱼(Collichthys niveatus)或小黄鱼(Larimichthys polyactis),最后定为小黄鱼(有1条序列结果);鲻虾虎鱼属为阿部氏鲻虾虎鱼(Mugilogobius abei)或粘皮鲻虾虎鱼(Mugilogobius myxodermus);虾虎鱼科1为大鳍弹涂鱼(Periophthalmus magnuspinnatus)或青弹涂鱼(Scartelaos histophorus);虾虎鱼科2为鳗虾虎鱼(Taenioides anguillaris)或拉氏狼牙虾虎鱼(Odontamblyopus lacepedii);虾虎鱼科3为弹涂鱼(Periophthalmus modestus)或小头栉孔虾虎鱼(Paratrypauchen microcephalus);虾虎鱼科4为大青弹涂鱼(Scartelaos gigas)或孔虾虎鱼(Trypauchen vagina);以上5组的序列分别与两个物种相似度为99%。 -
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