Genotype-environment interactions for growth and survival of channel catfish (Ictalurus punctatus), blue catfish (Ictalurus furcatus), and channel catfish, I. punctatus, ♀ x blue catfish, I. furcatus, ♂ hybrid fry at varying levels of sodium chloride

被引：4

作者：

Abass, Nermeen Y. ^{[1
,2
]}

Alsaqufi, Ahmed S. ^{[1
,3
]}

Makubu, Nonkonzo ^{[1
]}

Elaswad, Ahmed H. ^{[1
]}

Ye, Zhi ^{[1
]}

Su, Baofeng ^{[1
,4
]}

Qin, Zhenkui ^{[1
]}

Li, Hanbo ^{[1
]}

Dunham, Rex A. ^{[1
]}

机构：

[1] Auburn Univ, Sch Fisheries Aquaculture & Aquat Sci, Auburn, AL 36849 USA

[2] Univ Alexandria, Fac Agr Saba Basha, Dept Agr Bot, POB 2153, Alexandria, Egypt

[3] King Faisal Univ, Agr & Food Sci Coll, POB 31982, Al Ahsa City, Saudi Arabia

[4] Chinese Acad Fishery Sci, Heilongjiang Fisheries Res Inst, Key Lab Freshwater Aquat Biotechnol & Genet Breed, Minist Agr, Harbin 150070, Peoples R China

来源：

AQUACULTURE | 2017年 / 471卷

关键词：

Channel catfish; Blue catfish; Hybrid catfish; Salinity; Survival rate; Growth rate; SALINITY TOLERANCE; OREOCHROMIS-MOSSAMBICUS; FOOD-INTAKE; WATER; CONVERSION; TEMPERATURE; EFFICIENCY; BALANCE; OXYGEN; FISH;

D O I：

10.1016/j.aquaculture.2016.12.029

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

Salinity tolerance of yolk-sac larvae and swim-up fry of channel catfish (Ictalurus punctatus), blue catfish (I. furcatus), and hybrid catfish (channel catfish female x blue catfish male) was investigated at 0, 3, 6, and 9 ppt salinity. One-hundred percent mortality occurred at 9 ppt. Survivals were different (P b 0.05) by day 3 post hatch at 3 ppt, (P b 0.05) with blue catfish N hybrid catfish N channel catfish for salinity tolerance. Long-term survival of hybrid fry was better than that of the parent species at 0 ppt salinity, but highest for channel catfish at 3 ppt and 6 ppt with the hybrid being intermediate. NaCl had a negative effect on survival rate of yolk sac larvae starting at 3 ppt and for swim-up fry at 6 ppt. Genotype x environment interactions occurred for growth as hybrids grew faster than channel catfish and blue catfish at 0 ppt. Raising salinity to 3 ppt greatly increased the growth rate (50-75%) of channel catfish and blue catfish, but only slightly (10%) for hybrid catfish, which were still larger than the parent species. 6 ppt was detrimental to yolk-sac larvae and swim-up fry. These results help identify the saline environments that might be suitable for long-term growth and disease resistance of ictalurid catfish, and reveals changes in salinity tolerance during development. Statement of relevance: The life stages of channel, blue and hybrid catfish were not previously studied for tolerance of sodiumchloride and genotype-environment interations were observed indicating the ideal environment for culture or disease treatment varies among these genetic groups. Heterosis of the hybrids almost disappeared at 3 ppt and growth of channel catfish was greatly enhanced at 3 ppt. Greater Ich resistance of hybrids compared to parents at 0 ppt contradicted earlier reports at older life stages. (C) 2016 Elsevier B. V. All rights reserved.

引用

页码：28 / 36

页数：9

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