Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China

Abstract Background This study explores the age, growth, and energy storage of Triplophysa rosa, a troglobitic cavefish. A total of 102 wild T. rosa specimens were collected in Wulong County, Chongqing, China, between 2018 and 2022, with otoliths used for age determination. Results The earliest matu...

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Main Authors: Yuan Xu, Yangyang Jing, Jing Zhou, Rui Long, Juanzhu Meng, Ya Yang, Yiping Luo
Format: Article
Language:English
Published: BMC 2023-12-01
Series:BMC Ecology and Evolution
Subjects:
Online Access:https://doi.org/10.1186/s12862-023-02186-y
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author Yuan Xu
Yangyang Jing
Jing Zhou
Rui Long
Juanzhu Meng
Ya Yang
Yiping Luo
author_facet Yuan Xu
Yangyang Jing
Jing Zhou
Rui Long
Juanzhu Meng
Ya Yang
Yiping Luo
author_sort Yuan Xu
collection DOAJ
description Abstract Background This study explores the age, growth, and energy storage of Triplophysa rosa, a troglobitic cavefish. A total of 102 wild T. rosa specimens were collected in Wulong County, Chongqing, China, between 2018 and 2022, with otoliths used for age determination. Results The earliest mature individuals were determined to be 4.8 years old, while the maximum ages for females and males were estimated at 15.8 years and 12.2 years, respectively. The length (L, cm)-weight (W, g) relationship was found to be the same for both sexes, following the eq. W = 0.0046 L 3.03. Von Bertalanffy growth models were applied to the total length-at-age data, resulting in an asymptotic length of 23.4 cm and a K-parameter of 0.060 year−1. The body content of protein, ash, and glycogen did not show a significant correlation with the total length of T. rosa. However, both lipid and energy content exhibited a significant increase with total length. The lipid content ranged from 40.5 to 167.1 mg g−1, while the energy content ranged from 4.50 to 11.39 kJ g−1, indicating high storage features of T. rosa. Conclusions The results affirm that T. rosa exhibits life traits conducive to its population dynamics in cave conditions, characterized by slow growth, small size, and high lipid energy storage.
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spelling doaj.art-38a0dca150e24aa692f20538c16d8e252023-12-10T12:04:39ZengBMCBMC Ecology and Evolution2730-71822023-12-012311910.1186/s12862-023-02186-yAge, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, ChinaYuan Xu0Yangyang Jing1Jing Zhou2Rui Long3Juanzhu Meng4Ya Yang5Yiping Luo6Key Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest UniversityKey Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest UniversityDepartment of Clinical Medicine, Chongqing Medical and Pharmaceutical CollegeKey Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest UniversityKey Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest UniversityKey Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest UniversityKey Laboratory of Freshwater Fish Reproduction and Development, Ministry of Education, School of Life Sciences, Southwest UniversityAbstract Background This study explores the age, growth, and energy storage of Triplophysa rosa, a troglobitic cavefish. A total of 102 wild T. rosa specimens were collected in Wulong County, Chongqing, China, between 2018 and 2022, with otoliths used for age determination. Results The earliest mature individuals were determined to be 4.8 years old, while the maximum ages for females and males were estimated at 15.8 years and 12.2 years, respectively. The length (L, cm)-weight (W, g) relationship was found to be the same for both sexes, following the eq. W = 0.0046 L 3.03. Von Bertalanffy growth models were applied to the total length-at-age data, resulting in an asymptotic length of 23.4 cm and a K-parameter of 0.060 year−1. The body content of protein, ash, and glycogen did not show a significant correlation with the total length of T. rosa. However, both lipid and energy content exhibited a significant increase with total length. The lipid content ranged from 40.5 to 167.1 mg g−1, while the energy content ranged from 4.50 to 11.39 kJ g−1, indicating high storage features of T. rosa. Conclusions The results affirm that T. rosa exhibits life traits conducive to its population dynamics in cave conditions, characterized by slow growth, small size, and high lipid energy storage.https://doi.org/10.1186/s12862-023-02186-yCavefishGrowthStorageTriplophysa rosaVBGF
spellingShingle Yuan Xu
Yangyang Jing
Jing Zhou
Rui Long
Juanzhu Meng
Ya Yang
Yiping Luo
Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China
BMC Ecology and Evolution
Cavefish
Growth
Storage
Triplophysa rosa
VBGF
title Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China
title_full Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China
title_fullStr Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China
title_full_unstemmed Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China
title_short Age, growth, and energy storage of the subterranean fish Triplophysa rosa (Cypriniformes: Nemacheilidae) from Chongqing, China
title_sort age growth and energy storage of the subterranean fish triplophysa rosa cypriniformes nemacheilidae from chongqing china
topic Cavefish
Growth
Storage
Triplophysa rosa
VBGF
url https://doi.org/10.1186/s12862-023-02186-y
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