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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1645-1652 |
| Number of pages | 8 |
| Journal | Aquaculture International |
| Volume | 25 |
| Issue number | 4 |
| DOIs | |
| 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
Effects of strain and body weight on low-oxygen tolerance of channel catfish (Ictalurus punctatus). / Wang, Xiaozhu; Liu, Shikai; Dunham, Rex; Liu, Zhanjian "John".
In: Aquaculture International, Vol. 25, No. 4, 01.08.2017, p. 1645-1652.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of strain and body weight on low-oxygen tolerance of channel catfish (Ictalurus punctatus)
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.
KW - Environmental stressor
KW - Hypoxia
KW - Low dissolved oxygen
KW - Water quality
UR - http://www.scopus.com/inward/record.url?scp=85016430242&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85016430242&partnerID=8YFLogxK
U2 - 10.1007/s10499-017-0125-2
DO - 10.1007/s10499-017-0125-2
M3 - Article
VL - 25
SP - 1645
EP - 1652
JO - Aquaculture International
JF - Aquaculture International
SN - 0967-6120
IS - 4
ER -