Effects of Total Dissolved Gas Supersaturation on the Swimming Performance of Two Endemic Fish Species in the Upper Yangtze River

Wang, Yuanming; Li, Yong; An, Ru; Li, Kefeng

doi:10.1038/s41598-018-28360-7

Cited by 33 publications

(26 citation statements)

References 39 publications

(46 reference statements)

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“…For example, only four studies have explored the impacts of TDG on swimming performance in fish (e.g. Schiewe, 1974; Hans, Mesa, & Maule, 1999; Wang, An, Li, & Li, 2017; and Wang, Li, An, & Li, 2018). If bubbles are forming in the heart and occluding the gills during TDG exposure, we might expect reduced aerobic swimming capacity, affecting a fish's ability to capture prey, avoid predators and navigate in high flows, which could result in reduced fitness.…”

Section: Discussionmentioning

confidence: 99%

“…With a worldwide proliferation of dams underway (Zarfl et al., 2015), species that are important for commercial, recreational and subsistence fisheries in other parts of the world such as the Amazon, the Congo and the Mekong River Delta (Winemiller et al., 2016) warrant study. The only region outside of Canada and the United States where TDG research is being actively conducted is the Yangtze River system, where researchers are studying TDG effects on native species (Chen et al., 2012; Huang, Li, Du, & Li, 2010; Liang, Li, Li, & Tuo, 2013; Liu, Li, Jiang, & Wu, 2015; Liu, Li, Li, & Jiang, 2013). Species comparisons may also help to elucidate the mechanisms by which TDG harms fish.…”

Section: Discussionmentioning

confidence: 99%

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A meta‐analysis of gas bubble trauma in fish

et al. 2020

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There is currently a worldwide proliferation of dams, with 59 000 hydroelectric dams over 15 m high registered with the International Commission On Large Dams (2018). Furthermore, there are an additional 3,700 hydroelectric dams over 1 megawatt (MW) planned or under construction as of 2015 (Zarfl, Lumsdon, Berlekamp, Tydecks, & Tockner, 2015). Once these dams are constructed, the number of large, free-flowing rivers worldwide will be further reduced by 21% (Zarfl et al., 2015). These numbers do not account for the proliferation of small hydroelectric dams; Couto and Olden (2018) estimate that there exist over 82,000 small hydropower dams worldwide (≤10 MW or based on each country's definition of small hydropower dams). Currently, only 37% of rivers longer than 1,000 kilometres are free-flowing over their entire length (Grill et al., 2019). Most new dams are being built in countries with developing and emerging economies (Zarfl et al., 2015), where important benefits include electricity generation, control of water supply, low flow

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A meta‐analysis of gas bubble trauma in fish

et al. 2020

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“…The laboratory experiment was conducted with TDG supersaturation generation equipment, which was described in detail by Wang et al [43]. The level of TDG was measured by a Point Four Tracker, which was calibrated before the experiment.…”

Section: Methodsmentioning

confidence: 99%

The Tolerance Characteristics of Resident Fish in the Upper Yangtze River under Varying Gas Supersaturation

Xue

Yuan

et al. 2019

IJERPH

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In circumstances where total dissolved gas (TDG) levels are variable, the peak TDG and duration are expected to be the dominant drivers of fish survival. Focusing on the peak TDG and duration in natural rivers, a laboratory experiment and field experiments in the upper Yangtze River were conducted with Prenant’s Schizothoracin (Schizothorax prenanti), a rare species inhabiting the upper Yangtze River, to examine the tolerance characteristics of fish under varying gas supersaturation levels. The results of the field experiments showed that TDG supersaturation in natural rivers changed greatly during the flood period due to reservoir regulation. The survival of fish was affected by TDG levels, water depth and TDG fluctuation range. A high TDG level, and shallow compensatory water depth caused fish mortality in the field experiment to be higher in September than in July. The results of the laboratory experiment showed that fish tolerance was lower under fluctuating TDG supersaturation than under constant TDG supersaturation. The tolerance of fish to TDG supersaturation varied depending on peak TDG and duration. Under the fluctuation range of 115–125%, fish survival in the 6 h–6 h cycle was significantly different from that in the 8 h–8 h cycle. The fluctuation cycle did not affect fish survival at the fluctuation range of 110–130%. Intermittent lower TDG supersaturation does not significantly increase the tolerance of fish. This study revealed the tolerance characteristics of resident fish in the upper Yangtze River to TDG supersaturation, which provides a reference to the ecological operation of reservoirs and may contribute to the protection of aquatic organisms.

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“…In China, some endemic fish that inhabit the upper Yangtze River were included in the experiments to investigate the effect of TDG supersaturation on the hatching, growth, tolerance threshold and swimming ability of fish [17][18][19][20][21]. [21] noted that the swimming ability of Prenant's schizothoracin and Chinese sucker significantly declined with elevated levels of TDG supersaturation. Liang et al, (2013) [17] noted that the median hatching time of David's schizothoracin increased in conjunction with elevated TDG levels.…”

Section: Introductionmentioning

confidence: 99%

Effect of Total Dissolved Gas Supersaturation on the Survival of Bighead Carp (Hypophthalmichthys Nobilis)

Yuxuan

Cao

Liu

et al. 2020

Animals

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To assess the effect of TDG on the survival of different sizes of pelagic fish, bighead carp (Hypophthalmichthys nobilis) were subjected to TDG supersaturated water at levels of 125, 130, 135, and 140%. The results showed that apparent abnormal behaviours and symptoms of gas bubble disease (GBD) were observed in bighead carp. The survival probability of large and small juvenile bighead carp declined with increasing TDG levels. The median survival time (ST50) values of large juvenile bighead carp were 74.97 and 31.90 h at 130% and 140% TDG, respectively. While the ST50 of small fish were 22.40 and 6.72 h at the same TDG levels. In comparison to the large juvenile bighead carp, the small juvenile bighead carp showed weaker tolerance to TDG supersaturated water. Furthermore, acute lethality experiments after chronic exposure to TDG were initiated to further investigate the effect of TDG on bighead carp. The juveniles were first subjected to 115% TDG supersaturated water for 96 h. After chronic exposure, live fish were immediately transferred to TDG supersaturated water at levels of 125, 130, 135, and 140%. The results demonstrated that no fish died under chronic exposure and few fish exhibited slight GBD symptoms. The ST50 values for bighead carp subjected to acute exposure after chronic exposure were 61.23 and 23.50 h at 130 and 140%, respectively. Compared with the bighead carp subjected to acute exposure, bighead carp subjected to multiple exposures were more vulnerable to TDG.

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Effects of Total Dissolved Gas Supersaturation on the Swimming Performance of Two Endemic Fish Species in the Upper Yangtze River

Cited by 33 publications

References 39 publications

A meta‐analysis of gas bubble trauma in fish

A meta‐analysis of gas bubble trauma in fish

The Tolerance Characteristics of Resident Fish in the Upper Yangtze River under Varying Gas Supersaturation

Effect of Total Dissolved Gas Supersaturation on the Survival of Bighead Carp (Hypophthalmichthys Nobilis)

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