Regional sustainability: Pressures and responses of tourism economy and ecological environment in the Yangtze River basin, China

Frontiers in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 11

Published: Feb. 24, 2023

The relationship between the tourism economy and ecological environment is under pressure, balancing this crucial for promoting regional sustainability. In study, Yangtze River basin, first largest river in Asia third world, was selected as focus area. spatial temporal characteristics of economic development environmental pressure from 2000 to 2019 were analyzed using index, index dynamic change decoupling process system studied dynamically analysis model. results show that (1) spatially, basin exhibits a pattern high east low west, south north. Ecological pressures varied greatly, with less upstream provinces more middle downstream provinces. (2) Temporally, economies Qinghai Tibet started lower but faster growth rate, while Hunan Hubei have higher starting point limited change. changes do not clear distribution pattern. (3) moving toward harmonious development. Achieving balance two systems maintaining

Language: Английский

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Survival and swimming performance of a small-sized Cypriniformes (<em>Telestes muticellus</em>) tagged with passive integrated transponders

Journal of Limnology, Journal Year: 2023, Volume and Issue: 82

Published: March 21, 2023

Italian riffle dace (Telestes muticellus, Bonaparte 1837) is a small-bodied Leuciscidae native to the Peninsula, of which little known about ecology and individual movements in nature. Passive Integrated Transponder (PIT) telemetry used track fish behaviour. The basic assumption that PIT-tagged organism's performances do not differ considerably from their natural Here we present first evaluation potential tagging effects genus Telestes. survival rate tag retention were compared between two different implantation methods – injector gun scalpel incision - pit-tagging on swimming performance evaluated. Five weeks after tagging, demonstrated high rates all treatments: 94.8% for tagged with (n=58), 100% method 98.3% controls (n=58). was 96.6% treatment treatment. Prolonged performance, tested 22-23 days showed reduction endurance (time-to-fatigue) (n=22) control group (n=21), while no difference maximum velocity observed. We conclude PIT suitable technique dace, showing effect speed. Significantly lower prolonged although likely less ecologically important, shows without costs. Potential biases need be evaluated study-by-study basis, future studies should explore behavioural

Language: Английский

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Rapid physiological and transcriptomic changes associated with oxygen delivery in larval anemonefish suggest a role in adaptation to life on hypoxic coral reefs

PLoS Biology, Journal Year: 2023, Volume and Issue: 21(5), P. e3002102 - e3002102

Published: May 11, 2023

Connectivity of coral reef fish populations relies on successful dispersal a pelagic larval phase. Pelagic larvae must exhibit high swimming abilities to overcome ocean and currents, but once settling onto the reef, transition endure habitats that become hypoxic at night. Therefore, rapidly dramatically shift their physiology over short period time. Taking an integrative, physiological approach, using respirometry, examining hypoxia tolerance transcriptomics, we show cinnamon anemonefish ( Amphiprion melanopus ) between “physiological extremes” end Daily measurements entire early development they initially have very mass-specific oxygen uptake rates. However, rates decrease midway through This occurs in conjunction with switch haemoglobin gene expression increased myoglobin, cytoglobin, neuroglobin, which may all contribute observed increase tolerance. Our findings indicate critical ontogenetic changes oxygen-binding proteins underpin mechanisms needed for recruitment reefs.

Language: Английский

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Swimming performance of sharks and rays under climate change

Reviews in Fish Biology and Fisheries, Journal Year: 2022, Volume and Issue: 32(3), P. 765 - 781

Published: March 8, 2022

Abstract Climate change stressors (e.g., warming and ocean acidification) are an imminent challenge to the physiological performance of marine organisms. Several studies spanning last decade have reported widespread effects acidification on fishes, especially teleosts, but more work is needed elucidate responses in elasmobranchs, i.e., sharks rays. Dispersal capacity, as a result locomotor performance, crucial trait that will determine which group elasmobranchs be or less vulnerable changes environment. In fact, efficient high may capacity for relocate favorable area. this review we integrate findings from locomotion rays identify characteristics outline potential vulnerabilities strength under climate change. Traits such intraspecific variability response climatic stressors, wide geographic range, thermotaxis, fast swimming low energetic costs likely enhance disperse. Future focus understanding interacting effect morphology, biomechanics energetics steady unsteady swimming, across ontogeny species.

Language: Английский

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Yolo-AWD+CBT: An efficient algorithm for Micropterus salmoides swimming behavior analysis based on multi-object tracking

Aquaculture, Journal Year: 2024, Volume and Issue: 595, P. 741554 - 741554

Published: Sept. 6, 2024

Language: Английский

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Long lasting effects of early temperature exposure on the swimming performance and skeleton development of metamorphosing Gilthead seabream (Sparus aurata L.) larvae

Scientific Reports, Journal Year: 2021, Volume and Issue: 11(1)

Published: April 22, 2021

Abstract Temperatures experienced during early ontogeny significantly influence fish phenotypes, with clear consequences for the wild and reared stocks. We examined effect of temperature (17, 20, or 23 °C) short embryonic yolk-sac larval period, on swimming performance skeleton metamorphosing Gilthead seabream larvae. In following ontogenetic all were subjected to common (20 °C). The critical speed larvae was decreased from 9.7 ± 0.6 TL/s (total length per second) at 17 °C developmental (DT) 8.7 8.8 0.7 20 DT respectively ( p < 0.05). Swimming correlated body shape Compared rest groups, presented a slender shape, longer caudal peduncle, terminal mouth ventrally transposed pectoral fins. Moreover, affected relative depth heart ventricle (VD/TL , 0.05), which comparatively increased DT. Finally, incidence caudal-fin abnormalities 0.05) increase To our knowledge, this is first evidence significant period later stages.

Language: Английский

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GWAS reveals heritable individual variations in the inherent swimming performance of juvenile large yellow croaker

Aquaculture, Journal Year: 2022, Volume and Issue: 559, P. 738419 - 738419

Published: June 1, 2022

Language: Английский

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Spatial and temporal patterns in the distribution of fishes

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 199 - 222

Published: Jan. 1, 2025

Language: Английский

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Estimated Hydraulic Characteristics and the Entrainment of Fish Eggs and Larvae at a Pumped River‐Water Intake

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(2)

Published: Feb. 1, 2025

Abstract Withdrawal of fish eggs and larvae through a river intake (entrainment) may damage the river's early resources. To investigate how hydraulics (flow velocities, directions, magnitudes) around within water structure influence entrainment, this study focused on typical river‐pump intake. A turbulence model was developed based Euler‐Lagrange method variable helicity introduced to define zone from which is withdrawn organisms are entrained. The process simulated organism withdrawal validated by physical experiments using artificial under various flow conditions. results indicated that when intake‐to‐river ratio ranged 3 7‰, width planar entrainment area approximately 1.2 1.4 times structure, quantity accounted for 0.12% 0.49% incoming flux. increased with ratio. absolute threshold different conditions 0.004 0.047 m/s 2 , inversely proportional rate unaffected depth. An optimized design stepped side walls promoted, can minimize impact sedimentation reduce an average 11%. This research provides valuable insights safety resource protection.

Language: Английский

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The Swimming Performance and Transcriptomic Insights Into Diverse Gene Regulation in Grass Carp Brain Under Water Velocity Stress

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(3)

Published: March 1, 2025

Abstract By linking gene regulation to swimming performance under different water flow conditions, the study could reveal how fish adapt their environments, providing insights into evolutionary biology and ecology. The current observed significant variations in various velocities examined associated regulation. Grass carp were subjected controlled measure critical speed ( U crit ), which showed that was increased based on body length; however, a reduction as p < 0.05). Additionally, brain samples collected for transcriptomic analysis, revealed differentially expressed genes (DEGs) functionally annotated revealing key pathways with changed behavior patterns. Enrichment analysis variation all groups including 0.05***), skeletal system development hormone activity muscle contraction 0.05**), locomotion 0.05*), swim bladder 0.05*) found major regulators of grass velocities. Moreover, some identified significantly enzymes hormones, play potential role during such gene‐ca7 0.005***). provides evidence neurogenetic mechanism underlying velocity, have important implications understanding impact hydrodynamics fish.

Language: Английский

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