Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China
Otolith growth and microstructural features of fish are essential to the understanding of the early fish lifecycle. This paper assesses the features of otoliths from laboratory-reared larval and juvenile <i>Sinogastromyzon wui</i> (<i>S. wui</i>, 0 to 25 days post-hatching) t...
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MDPI AG
2022-03-01
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| Series: | Fishes |
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| author | Minghui Gao Zhiqiang Wu Liangliang Huang Xichang Tan Mingsi Li Haibo Huang |
| author_facet | Minghui Gao Zhiqiang Wu Liangliang Huang Xichang Tan Mingsi Li Haibo Huang |
| author_sort | Minghui Gao |
| collection | DOAJ |
| description | Otolith growth and microstructural features of fish are essential to the understanding of the early fish lifecycle. This paper assesses the features of otoliths from laboratory-reared larval and juvenile <i>Sinogastromyzon wui</i> (<i>S. wui</i>, 0 to 25 days post-hatching) that were obtained as eggs from the Shilong Reach of Xijiang River between April and August 2021. We observed the development of the three pairs of otoliths (lapilli, sagittae, and asterisci) and compared the shape changes and growth of the lapilli and sagittae, as well as the timing and deposition rate of increments of the lapilli. The lapilli and the sagittae were visible on hatching, whereas the asterisci were present at four days post-hatching (dph). The shape of the sagitta changed more obviously than that of the lapillus, and a strong correlation was observed between sagitta shape changes and fish ontogenesis. The otolith shape greatly modulated during the post-flexion larval stage (Post-FLS), it corresponded with the formation period of individual fins. Analysis of the microstructural features indicated that lapilli were the optimal otolith for age determination and increment deposition rate confirmation. Using regression analysis of the known age and the number of lapillus daily increments, we demonstrated that the lapillus developmental increments were deposited daily, and the first increment formed at two days post-hatching. Our conclusions support employing the lapillus increment deposition rate and the time of the first daily increments in the determination of the age of wild larval and juvenile <i>S. wui</i>. |
| first_indexed | 2024-03-09T10:38:09Z |
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| language | English |
| last_indexed | 2024-03-09T10:38:09Z |
| publishDate | 2022-03-01 |
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| series | Fishes |
| spelling | doaj.art-e08a36889e214bdba60dbc8046455f752023-12-01T20:52:40ZengMDPI AGFishes2410-38882022-03-01725710.3390/fishes7020057Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, ChinaMinghui Gao0Zhiqiang Wu1Liangliang Huang2Xichang Tan3Mingsi Li4Haibo Huang5College of Life Science and Technology, Guangxi University, Nanning 350000, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, Guilin 541000, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, Guilin 541000, ChinaBureau of Hydrology and Water Resources, Pearl River Conservancy Commission of Ministry of Water Resources, Guangzhou 510000, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, Guilin 541000, ChinaCollege of Environmental Science and Engineering, Guilin University of Technology, Guilin 541000, ChinaOtolith growth and microstructural features of fish are essential to the understanding of the early fish lifecycle. This paper assesses the features of otoliths from laboratory-reared larval and juvenile <i>Sinogastromyzon wui</i> (<i>S. wui</i>, 0 to 25 days post-hatching) that were obtained as eggs from the Shilong Reach of Xijiang River between April and August 2021. We observed the development of the three pairs of otoliths (lapilli, sagittae, and asterisci) and compared the shape changes and growth of the lapilli and sagittae, as well as the timing and deposition rate of increments of the lapilli. The lapilli and the sagittae were visible on hatching, whereas the asterisci were present at four days post-hatching (dph). The shape of the sagitta changed more obviously than that of the lapillus, and a strong correlation was observed between sagitta shape changes and fish ontogenesis. The otolith shape greatly modulated during the post-flexion larval stage (Post-FLS), it corresponded with the formation period of individual fins. Analysis of the microstructural features indicated that lapilli were the optimal otolith for age determination and increment deposition rate confirmation. Using regression analysis of the known age and the number of lapillus daily increments, we demonstrated that the lapillus developmental increments were deposited daily, and the first increment formed at two days post-hatching. Our conclusions support employing the lapillus increment deposition rate and the time of the first daily increments in the determination of the age of wild larval and juvenile <i>S. wui</i>.https://www.mdpi.com/2410-3888/7/2/57ontogenyteleost anatomydevelopmentfish morphologyFourier |
| spellingShingle | Minghui Gao Zhiqiang Wu Liangliang Huang Xichang Tan Mingsi Li Haibo Huang Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China Fishes ontogeny teleost anatomy development fish morphology Fourier |
| title | Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China |
| title_full | Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China |
| title_fullStr | Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China |
| title_full_unstemmed | Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China |
| title_short | Growth and Microstructural Features in Otoliths of Larval and Juvenile <i>Sinogastromyzon wui</i> (F. Balitoridae, River Loaches) of the Upper Pearl River, China |
| title_sort | growth and microstructural features in otoliths of larval and juvenile i sinogastromyzon wui i f balitoridae river loaches of the upper pearl river china |
| topic | ontogeny teleost anatomy development fish morphology Fourier |
| url | https://www.mdpi.com/2410-3888/7/2/57 |
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