Effects of age and size on critical swimming speed of juvenile Chinese sturgeon <i>Acipenser sinensis</i> at seasonal temperatures

He, Xinyi; Lu, Shun; Liao, Mingdun; Zhu, Xiaoyong; Zhang, M; Li, S; You, Xinxin; Chen, J

doi:10.1111/j.1095-8649.2012.12015.x

Cited by 23 publications

(12 citation statements)

References 46 publications

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“…Therefore, we devised time intervals τ = 0.1 or 0.2 s to make the time discrete. Because the speed of fish is about a few body lengths per second [26], we devised a corresponding space division mode, so that the fish can reach a different cell in a time interval τ .…”

Section: Coarse-grained In Space and Timementioning

confidence: 99%

Information Dynamics in the Interaction between a Prey and a Predator Fish

Nie

2015

Entropy

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Accessing information efficiently is vital for animals to make the optimal decisions, and it is particularly important when they are facing predators. Yet until now, very few quantitative conclusions have been drawn about the information dynamics in the interaction between animals due to the lack of appropriate theoretic measures. Here, we employ transfer entropy (TE), a new information-theoretic and model-free measure, to explore the information dynamics in the interaction between a predator and a prey fish. We conduct experiments in which a predator and a prey fish are confined in separate parts of an arena, but can communicate with each other visually and tactilely. TE is calculated on the pair's coarse-grained state of the trajectories. We find that the prey's TE is generally significantly bigger than the predator's during trials, which indicates that the dominant information is transmitted from predator to prey. We then demonstrate that the direction of information flow is irrelevant to the parameters used in the coarse-grained procedures. We further calculate the prey's TE at different distances between it and the predator. The resulted figure shows that there is a high plateau in the mid-range of the distance and that drops quickly at both the near and the far ends. This result reflects that there is a sensitive space zone where the prey is highly vigilant of the predator's position.

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Section: Coarse-grained In Space and Timementioning

confidence: 99%

Information Dynamics in the Interaction between a Prey and a Predator Fish

Nie

2015

Entropy

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“…They concluded that, according to the drinking water salinity standard of 0.45 psu, the upper boundary of saltwater intrusion in the south branch is near Wusong and Pu Town, about 30 km from the East Beach of Chongming Island. However, salinity had less effect on the swimming ability of juveniles over 7 months of age (He et al, 2013). See also Figure S1.…”

Section: Resultsmentioning

confidence: 97%

Drifting with Flow versus Self-Migrating—How Do Young Anadromous Fish Move to the Sea?

Zhen-li

2019

iScience

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“…Before testing, fish were acclimated overnight in the respirometer at a very low flow speed (0.3∼0.5 bl/s) and then allowed to swim at 0.5 bl/s from 7:00–8:00 am the next morning [12], [28]. When testing began, flow speed was increased by 0.5 bl/s every 20 min and dissolved oxygen was measured at 5 min intervals.…”

Section: Methodsmentioning

confidence: 99%

“…Chinese sturgeon once migrated further than any other sturgeon, over 3,200 km in the Yangtze River. Restoration of the wild sturgeon populations is difficult due to long maturation time, infrequent spawning and low productivity [11]–[12]. Although the species has a life span of 50–60 years, the species breeds only three or four times and the hatchling survival rate is estimated at <1%.…”

Section: Introductionmentioning

confidence: 99%

Integrating Water Flow, Locomotor Performance and Respiration of Chinese Sturgeon during Multiple Fatigue-Recovery Cycles

Cai¹,

Chen

Johnson

et al. 2014

PLoS ONE

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The objective of this study is to provide information on metabolic changes occurring in Chinese sturgeon (an ecologically important endangered fish) subjected to repeated cycles of fatigue and recovery and the effect on swimming capability. Fatigue-recovery cycles likely occur when fish are moving through the fishways of large dams and the results of this investigation are important for fishway design and conservation of wild Chinese sturgeon populations. A series of four stepped velocity tests were carried out successively in a Steffensen-type swimming respirometer and the effects of repeated fatigue-recovery on swimming capability and metabolism were measured. Significant results include: (1) critical swimming speed decreased from 4.34 bl/s to 2.98 bl/s; (2) active oxygen consumption (i.e. the difference between total oxygen consumption and routine oxygen consumption) decreased from 1175 mgO2/kg to 341 mgO2/kg and was the primary reason for the decrease in U crit; (3) excess post-exercise oxygen consumption decreased from 36 mgO2/kg to 22 mgO2/kg; (4) with repeated step tests, white muscle (anaerobic metabolism) began contributing to propulsion at lower swimming speeds. Therefore, Chinese sturgeon conserve energy by swimming efficiently and have high fatigue recovery capability. These results contribute to our understanding of the physiology of the Chinese sturgeon and support the conservation efforts of wild populations of this important species.

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Effects of age and size on critical swimming speed of juvenile Chinese sturgeon Acipenser sinensis at seasonal temperatures

Cited by 23 publications

References 46 publications

Information Dynamics in the Interaction between a Prey and a Predator Fish

Information Dynamics in the Interaction between a Prey and a Predator Fish

Drifting with Flow versus Self-Migrating—How Do Young Anadromous Fish Move to the Sea?

Integrating Water Flow, Locomotor Performance and Respiration of Chinese Sturgeon during Multiple Fatigue-Recovery Cycles

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