Effects of strain and body weight on low-oxygen tolerance of channel catfish (Ictalurus punctatus)

Xiaozhu Wang; Shikai Liu; Rex Dunham; Zhanjian "John" Liu

doi:10.1007/s10499-017-0125-2

Effects of strain and body weight on low-oxygen tolerance of channel catfish (Ictalurus punctatus)

Xiaozhu Wang, Shikai Liu, Rex Dunham, Zhanjian "John" Liu

Research output: Contribution to journal › Article

Original language	English (US)
Pages (from-to)	1645-1652
Number of pages	8
Journal	Aquaculture International
Volume	25
Issue number	4
DOIs	https://doi.org/10.1007/s10499-017-0125-2
State	Published - Aug 1 2017
Externally published	Yes

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Keywords

Environmental stressor
Hypoxia
Low dissolved oxygen
Water quality

ASJC Scopus subject areas

Aquatic Science
Agronomy and Crop Science

Cite this

Wang, X., Liu, S., Dunham, R., & Liu, Z. J. (2017). Effects of strain and body weight on low-oxygen tolerance of channel catfish (Ictalurus punctatus). Aquaculture International, 25(4), 1645-1652. https://doi.org/10.1007/s10499-017-0125-2

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title = "Effects of strain and body weight on low-oxygen tolerance of channel catfish (Ictalurus punctatus)",

abstract = "Low-oxygen tolerance is important for aquaculture species, because exposure to hypoxia can result in heavy mortalities. This study evaluated the effects of strain, body weight, and gender on low-oxygen tolerance in channel catfish (Ictalurus punctatus) exposed to a lethal concentration of dissolved oxygen (0.1 mg/L). The variation in low-oxygen tolerance, assessed as the time to loss of equilibrium, of channel catfish from six strains (103KS, Kansas, KMix, Marion, Marion S, and Thompson) was examined. Catfish (15–179 g) showed a large variation in resistant time to hypoxia, ranging from 8 to 104 min, and both strain and body weight contributed significantly to this variation (P < 0.05). 103KS and Marion S strains had higher low-oxygen tolerance than the other strains, while the Marion strain had the poorest low-oxygen tolerance (P < 0.05). In addition to genetic background, body weight positively correlated with low-oxygen tolerance, but there were no significant differences between female and male catfish in low-oxygen tolerance. The results indicate that genetic background and body weight are important factors that contribute variations in low-oxygen tolerance.",

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author = "Xiaozhu Wang and Shikai Liu and Rex Dunham and Liu, {Zhanjian {"}John{"}}",

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AU - Wang, Xiaozhu

AU - Liu, Shikai

AU - Dunham, Rex

AU - Liu, Zhanjian "John"

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Low-oxygen tolerance is important for aquaculture species, because exposure to hypoxia can result in heavy mortalities. This study evaluated the effects of strain, body weight, and gender on low-oxygen tolerance in channel catfish (Ictalurus punctatus) exposed to a lethal concentration of dissolved oxygen (0.1 mg/L). The variation in low-oxygen tolerance, assessed as the time to loss of equilibrium, of channel catfish from six strains (103KS, Kansas, KMix, Marion, Marion S, and Thompson) was examined. Catfish (15–179 g) showed a large variation in resistant time to hypoxia, ranging from 8 to 104 min, and both strain and body weight contributed significantly to this variation (P < 0.05). 103KS and Marion S strains had higher low-oxygen tolerance than the other strains, while the Marion strain had the poorest low-oxygen tolerance (P < 0.05). In addition to genetic background, body weight positively correlated with low-oxygen tolerance, but there were no significant differences between female and male catfish in low-oxygen tolerance. The results indicate that genetic background and body weight are important factors that contribute variations in low-oxygen tolerance.

AB - Low-oxygen tolerance is important for aquaculture species, because exposure to hypoxia can result in heavy mortalities. This study evaluated the effects of strain, body weight, and gender on low-oxygen tolerance in channel catfish (Ictalurus punctatus) exposed to a lethal concentration of dissolved oxygen (0.1 mg/L). The variation in low-oxygen tolerance, assessed as the time to loss of equilibrium, of channel catfish from six strains (103KS, Kansas, KMix, Marion, Marion S, and Thompson) was examined. Catfish (15–179 g) showed a large variation in resistant time to hypoxia, ranging from 8 to 104 min, and both strain and body weight contributed significantly to this variation (P < 0.05). 103KS and Marion S strains had higher low-oxygen tolerance than the other strains, while the Marion strain had the poorest low-oxygen tolerance (P < 0.05). In addition to genetic background, body weight positively correlated with low-oxygen tolerance, but there were no significant differences between female and male catfish in low-oxygen tolerance. The results indicate that genetic background and body weight are important factors that contribute variations in low-oxygen tolerance.

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KW - Low dissolved oxygen

KW - Water quality

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Access to Document

10.1007/s10499-017-0125-2