Reproductive characteristics of Gymnocypris firmispinatus in the Anning River, China

Ma, Baoshan; Wei, Kaijin; Xu, Bin; Xu, Jin; Zhu, Xiang‐Yun; Nie, Yuanyuan

doi:10.1007/s12562-018-1249-7

Cited by 3 publications

(7 citation statements)

References 26 publications

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“…Some studies found that the highest percentage of fish with empty guts occurred during the spawning season, which was attributed to a significant decrease in food ingestion during reproduction (Hovde et al 2002;Šantić et al 2009). However, no specific differences in observed trends of feeding intensity were seen in the present study for the reproductive period of G. firmispinatus, which is between March and May (Ma et al 2018). The lowest feeding intensity was observed in winter, which may have been related to the low water temperature then (Abid et al 2013), and could indicate strong temperature-dependent regulation of food intake in G. firmispinatus, or lower metabolism in this season, which may lead to a decrease in food ingestion to a minimum 24.10 30.67 35.20 27.08 16.71 21.46 38.15 44.60 57.13 26.03 13.12 26.66 28.11 28.72 (Šantić et al 2005).…”

Section: Discussioncontrasting

confidence: 67%

“…Many species of macroinvertebrates reside amongst the cobbles and boulders that mainly comprise the river bed (Ma et al 2019b). G. firmispinatus is adapted to its habitat amongst the cobble crevices of the lotic streams, and it feeds mainly on aquatic insects and their larvae (Chen and Cao 2000;Ma et al 2017Ma et al , 2018.…”

Section: Study Areamentioning

confidence: 99%

“…Due to fragmentation of the main stem of the Anning River by the construction of hydropower stations, G. firmispinatus has mostly moved into the river's tributaries (Ma et al 2018). Thus, specimens were sampled from tributaries, and specifically from those that originated from the middle of the river.…”

Section: Sample Collectionmentioning

confidence: 99%

“…Sex was determined by macroscopic examination of gonadal morphology. Based on the observations of gonadal development and/or secondary sexual characteristics and according to Ma et al (2018), the fish were assigned to one of two size classes (small individuals, class I ≤ 100 mm; large individuals, class II > 100 mm), to examine differences in feeding intensity and diet composition.…”

Section: Sample Collectionmentioning

confidence: 99%

“…However, knowledge of the ecological requirements of G. firmispinatus is limited. Ma et al (2018Ma et al ( , 2019a studied the life history traits of this species, and found that it has slow growth, low fecundity and late maturity, which suggest that it might be particularly susceptible to human activities.…”

Section: Introductionmentioning

confidence: 99%

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Feeding habits of the cyprinid Gymnocypris firmispinatus in the Anning River, China

Wei

et al. 2020

Fish Sci

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The feeding habits and prey selection of Gymnocypris firmispinatus in the Anning River were investigated with respect to fish size, season and sex. Gut contents of 305 individuals ranging in size from 57 to 193 mm total length were analyzed, and 16.0% of the guts were found to be empty. The vacuity index indicated that the feeding intensity of the fish roughly followed a seasonal trend, with minimum food intake in winter. However, statistically insignificant variation in the vacuity index was observed between size classes and sexes. Overall, 46 prey taxa belonging to five orders (Ephemeroptera, Plecoptera, Trichoptera, Coleoptera and Diptera) were identified in the guts of 141 fish. G. firmispinatus fed almost exclusively on aquatic insects, of which Baetis sp. and Simulium sp. were the predominant prey species, followed by Diamesa sp. and Glossosoma sp. G. firmispinatus is a generalist feeder that relies upon a wide trophic spectrum. The multivariate analysis revealed that fish size was the principal factor affecting diet. Small individuals fed primarily on small ephemeropteran larvae and dipteran larvae, whereas larger individuals preferably consumed bigger trichopteran larvae. In terms of its prey, G. firmispinatus showed strong positive selection for dipteran larvae and trichopteran larvae, and negative selection for ephemeropteran larvae, plecopteran larvae and coleopteran larvae in all seasons. This study provides evidence that the observed diet of G. firmispinatus can be explained by prey selection rather than random feeding.

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Section: Discussioncontrasting

confidence: 67%

Section: Study Areamentioning

confidence: 99%

Section: Sample Collectionmentioning

confidence: 99%

Section: Sample Collectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Feeding habits of the cyprinid Gymnocypris firmispinatus in the Anning River, China

Wei

et al. 2020

Fish Sci

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Spawning cohort trade‐offs of reproductive time and output in cyprinid fish along an elevation gradient

Liu,

Ding,

Bond

et al. 2023

Ecology of Freshwater Fish

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Understanding environmental requirements for fish reproduction in natural habitats is crucial for population conservation and restoration. However, such information is extremely scarce for the highly threatened schizothoracine fishes that cover large elevation ranges on the Tibetan Plateau. This research investigated the spawning time, output and environmental conditions of wild Schizopygopsis thermalis along an elevational gradient (i.e., from 1766 to 4372 m) in the upper Nu‐Salween River. It found that the spawning grounds of S. thermalis were mainly located at elevations between 3600 and 4372 m, and spawning habitats mostly consist of still marginal areas (still water <10 cm deep) with gravel substrates. Otolith microstructure analysis revealed, for the first time, that S. thermalis spawns in two seasons (i.e., winter: from December to next February, and spring: from April to May), with the winter spawning period generally longer than the spring spawning period. Winter spawning started earlier and ended earlier at higher elevations, while spring spawning occurred earlier at lower elevations but ended simultaneously at higher elevations. As elevation increases, reproductive output also increases, and spawning cohorts shift from winter‐dominant to spring‐dominant. Winter spawning cohorts were associated with lower water temperatures but higher discharges than the spring spawning cohort, and both cohorts showed elevation‐related environmental preferences. Our results suggest that schizothoracine fish can adapt spawning strategies to elevation‐related environmental conditions, which fill the gaps in the reproductive characteristics of schizothoracine fishes, and highlight the importance of conserving schizothoracine habitats at high elevations in the Qinghai‐Tibetan rivers.

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Research progress on the systematic evolution and plateau adaptation of schizothoracine fishes

Baoshan,

Kaijin,

Tianyi

et al. 2023

Journal of Lake Sciences

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Reproductive characteristics of Gymnocypris firmispinatus in the Anning River, China

Cited by 3 publications

References 26 publications

Feeding habits of the cyprinid Gymnocypris firmispinatus in the Anning River, China

Feeding habits of the cyprinid Gymnocypris firmispinatus in the Anning River, China

Spawning cohort trade‐offs of reproductive time and output in cyprinid fish along an elevation gradient

Research progress on the systematic evolution and plateau adaptation of schizothoracine fishes

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