Variations of Length–Weight Relationships for Six Fish Species from the Lower Yarlung Zangbo River Catchment, Tibet, China
The lower reaches of the Yarlung Zangbo River are one of the most important biodiversity hotspots worldwide. With the rapid economic development in the area coupled with global climate change, the fish resources and diversity of this region are experiencing serious threats. Basic biological informat...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
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| Series: | Fishes |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2410-3888/10/2/56 |
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| Summary: | The lower reaches of the Yarlung Zangbo River are one of the most important biodiversity hotspots worldwide. With the rapid economic development in the area coupled with global climate change, the fish resources and diversity of this region are experiencing serious threats. Basic biological information on most fishes in the river is limited, restricting the conservation of local fish resources. This study aimed to provide estimates of length–weight relationships (LWRs) for six fish species from the lower Yarlung Zangbo River catchment, Tibet, China. From 2023 to 2024, 4034 specimens belonging to two families, five genera, and six species were collected using various types of fishing techniques. The LWRs of five species, namely <i>Schizothorax curvilabiatus</i>, <i>Schizothorax molesworthi</i>, <i>Pseudecheneis sulcata</i>, <i>Parachiloglanis hodgarti</i>, and <i>Exostoma labiatum</i> were reported for the first time to FishBase, except <i>Garra tibetana</i>. The <i>b</i> values calculated from the LWRs ranged between 2.738 and 3.172, and the <i>r</i><sup>2</sup> values for all LWRs estimates ranged from 0.931 to 0.989. Sexual variations of LWRs were observed in <i>S. molesworthi</i> and <i>P. sulcata</i>; seasonal variations were detected in <i>S. curvilabiatus</i>, <i>S. molesworthi</i>, <i>G. tibetana</i>, <i>P. sulcata</i>, and <i>P. hodgarti</i>; and geographical differences were discovered in <i>S. molesworthi</i>, <i>G. tibetana</i>, <i>P. sulcate</i>, <i>P. hodgarti</i>, and <i>E. labiatum</i>. Additionally, this study updated information for FishBase by providing a new record of maximum standard length for <i>S. curvilabiatus</i>, <i>S. molesworthi</i>, <i>G. tibetana</i>, and <i>P. hodgarti</i> and a new record of total length for <i>P. sulcata</i>. The findings of this study are essential for the management and conservation of locally indigenous fish and fisheries. |
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| ISSN: | 2410-3888 |