Length-weight and length-length relationships of four native fish species from the Yalong River, China

S., B.; Xu, Bin; Wei, Kaijin; Deng, Longjun; Gan, Weixiong; Zhu, Xiang‐Yun; Yao, Y. H.

doi:10.1111/jai.13359

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…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%

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: Study Areamentioning

confidence: 99%

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

Wei

et al. 2020

Fish Sci

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“…Simultaneously, coefficient of determination (r 2 ) was estimated. Outliers were eliminated by using log (TL) − log (BW) plots before regression analyses (Ma et al, 2017). Statistical analyses were conducted using SPSS 20.0 and Excel 2016.…”

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confidence: 99%

Length–weight relationship of six endemic fish species in the Qinghai‐Tibet Plateau, China

Zhong

Feng

et al. 2021

J Appl Ichthyol

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Length-weight relationships (LWRs) of fish are applied to elucidate relationship between total length or standard length and body weight (Duvan Gomez-Vanega & López-Uriarte, 2021;Munilkumar et al., 2021;Zhang et al., 2018). LWRs are useful in fishery science and management provided they are obtained in combination with other essential parameters required for stock assessment (Danielle, 2017). Generally, LWRs can be also used to compare the condition of a species from different habitats when all studies involved use the same standardized sampling methodology (Hossain et al., 2017;Wang et al., 2016). In the other hand, with the increasing attention to the conservation of biodiversity, non-destructive monitoring for fish is particularly important, especially for the rare and endemic or some protected fish species.However, LWRs of fish could simplify field monitoring progress

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“…Schizothorax wangchiachii feeds on benthic diatoms and invertebrates (Ma et al, 2017). Percocypris pingi is a carnivorous fish, which usually feeds on other fish such as S. wangchiachii (Chen et al, 2015).…”

Section: Schizothorax Wangchiachii (Cypriniformes: Cyprinidae) Andmentioning

confidence: 99%

“…Schizothorax wangchiachii (Cypriniformes: Cyprinidae) and Percocypris pingi (Cypriniformes: Cyprinidae) are two important economic fish mainly distributed in upper reaches of the Yangtze River drainage, including the Jinsha and Yalong rivers (Ding, 1994). Schizothorax wangchiachii feeds on benthic diatoms and invertebrates (Ma et al, 2017). Percocypris pingi is a carnivorous fish, which usually feeds on other fish such as S .…”

Section: Introductionmentioning

confidence: 99%

Effect of predation‐risk and foraging opportunities on substrate choice and strength of brightness preference inSchizothorax wangchiachiiandPercocypris pingijuveniles

Zhang

et al. 2021

Aquaculture Research

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Fish substrate preference may be largely influenced by genetics. However, does predator‐experience training (hatchery‐reared fish exposed to their natural predators while in captivity) or the presence of conspecifics, prey or predator affect this preference? We determined the effect of predation‐risk and foraging opportunities on substrate choice of Schizothorax wangchiachii and Percocypris pingi when in the presence of a conspecific, predator or prey. We found that both S. wangchiachii and P. pingi juveniles preferred the large gravel substrate, regardless of prey/predator presence or previous training. When in the presence of a predator, wild and predator‐trained hatchery‐reared S. wangchiachii juveniles chose the white substrate over the black substrate as it was the furthest away from the predator (Silurus meridionalis), whereas the predator‐naïve individuals preferred the black substrate. This suggests that predation stress training could improve the ability to recognize and avoid predators in hatchery‐reared S. wangchiachii juveniles. Wild and hatchery‐reared P. pingi juveniles continued to choose the black substrate even though it was distant from the potential prey (S. wangchiachii). The time spent by wild P. pingi juveniles over black substrate was significantly lower than hatchery‐reared juveniles. It is possible that the wild P. pingi juveniles' ability to recognize prey resulted in their more frequent movement towards the prey. The findings in the present study may lead to better predator/prey‐recognition training of hatchery‐reared S. wangchiachii and P. pingi juveniles, potentially increasing their survival rate when released to the wild.

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Length-weight and length-length relationships of four native fish species from the Yalong River, China

Cited by 6 publications

References 5 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

Length–weight relationship of six endemic fish species in the Qinghai‐Tibet Plateau, China

Effect of predation‐risk and foraging opportunities on substrate choice and strength of brightness preference inSchizothorax wangchiachiiandPercocypris pingijuveniles

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