Genotype-environment interactions for survival and growth rate at varying levels of sodium chloride for growth hormone transgenic channel catfish (Ictalurus punctatus), channel catfish, and albino channel catfish

Comparison of growth performance among channel-blue hybrid catfish, ccGH transgenic channel catfish, and channel catfish in a tank culture system

“…However, the hybrid catfish grew 1.3- fold larger than non-transgenic channel catfish. Our results and those of Abass et al 27 , 28 indicated that the channel catfish growth hormone (ccGH) gene was incorporated and affected their growth performance compared to their non-transgenic. This is especially significant as hybrid catfish usually grow faster than channel catfish in high density raceways 33 , 34 , but in the current experiment GH transgenic channel catfish grew faster than high performance hybrid catfish.…”

“…GH transgenic fish also have exhibited increased rates of protein synthesis, numbers of mitochondria in the cell, lipid mobilization, numbers of glycogen globules, feeding behavior, feed conversion efficiency, metabolic rate, changes in head and body morphometrics, osmoregulation, cold and salinity tolerance, and age-at-maturity 18 , 27 , 40 – 43 . Growth hormone transgenic Atlantic salmon had decreased feed consumption of 25% and time to reach market weight by 40% compared to non-transgenic fish 43 .…”

“…Gene transfer is an effective way to improve somatic growth and production in aquaculture 21 . Gene transfer has been used to produce various fast-growing transgenic fish species such as Atlantic salmon ( Salmo salar ) 22 , Nile tilapia ( Oreochromis niloticus ) 23 , mud loach ( Misgurnus mizolepis ) 24 , common carp ( Cyprinus carpio ) 25 , coho salmon ( Oncorhynchus kisutch ) 21 , rainbow trout ( Oncorhynchus mykiss ) 26 , and channel catfish ( Ictalurus punctatus ) 27 , 28 .…”

“…Growth hormone (GH) transgenesis can result in greatly increased growth rate in fish from 2- to an incredible 40-fold 27 , 29 , and the use of this technology for aquaculture production is now approved in the USA and Canada for triploid Atlantic salmon ( Salmo salar ) containing a chinook salmon GH transgene driven by the ocean pout antifreeze promoter (opAFP-GHc2) 30 , 31 . The growth rate of channel catfish, Ictalurus punctatus , was improved by 23–33% by transferring salmonid growth hormone gene 29 , 32 , and improved by 83–100% at 0.0 and 2.5 ppt salinities 27 and 23–80% by transferring channel catfish growth hormone gene 28 .…”

“…The objective of this study was to compare the growth performance among channel catfish, Ictalurus punctatus, ♀ × blue catfish, I. furcatus, ♂ hybrids, channel catfish transgenic for the channel catfish growth hormone (ccGH) cDNA driven by the antifreeze protein promoter from an ocean pout Zoarces americanus (opAFP-ccGH) and their non-transgenic channel catfish control. GH transgenesis can result in different gains in growth rate in channel catfish 27 , 28 and hybridization has resulted in heterosis for growth rate in the channel-blue hybrid catfish 12 , but comparison of growth performance between channel-blue hybrid and the GH transgenesis has not been examined.…”