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Here they are in short form. Very neat find !

International Journal of Recirculating Aquaculture 5 (2004) 43-54. All Rights Reserved
© Copyright 2004 by Virginia Tech and Virginia Sea Grant, Blacksburg, VA US

Hatchery and Growout Performance of Sunshine Bass and Backcross Hybrid Striped Bass in Recirculating Aquaculture Systems

ABSTRACT
Previous research has suggested that backcross hybrid striped bass (BX: sunshine bass female x striped bass male) perform as well as F1 hybrid striped bass (sunshine bass: white bass female x striped bass male) for many economically important traits. We conducted trials to compare rearing and growth traits of selected backcross hybrid striped bass with hybrid striped bass (HSB). We spawned and reared larval BX fry in two hatchery cycles, measured fry growth and performance, and compared them to past performance of HSB fry. We conducted a grow-out trial of commercially-available hybrid striped bass versus backcross hybrid striped bass in replicated tanks to phase II fingerling size (approximately 100g). Compared to HSB, in the hatchery phase, backcross hybrid striped bass exhibited lower fertilization rate, comparable swimbladder inflation rate, shorter time-to-weaning, lower survival, comparable growth, and comparable condition factor. After 60 days, HSB exhibited significantly better growth, survival, and feed conversion efficiency than BX. However, BX may have better potential market acceptance by virtue of having a lower condition factor, appearing longer and less deep-bodied than HSB.



NORTH CAROLINA STATE UNIV submitted to

BUILDING A SUPERIOR HYBRID STRIPED BASS: DNA MARKER-ASSISTED INTROGRESSION


Non Technical Summary
A major impediment to survival and expansion of the U.S. hybrid striped bass (HSB) farming industry is the reliance of producers on wild broodstock for spawning. Production of an essentially wild cultivar is inefficient, resulting in high costs that preclude penetration of the product into traditional retail markets and that render the HSB industry vulnerable to aggressive competition from imported farmed and wild seafood products. During the tenure of this research, we will create the improved HSB stock needed for industry expansion and establish the molecular tools and genetic knowledge necessary for continued selective improvement of the new cultivar over the next decade We will begin developing the new HSB cultivar by coupling established procedures for introgressive hybridization with marker-assisted selection based on our recently established suite of > 400 microsatellite DNA marker loci and our existing procedures for high through-put genotyping of fish at about half of these loci. In the present project, we aim to utilize DNA marker-assisted introgression (MAI) to establish the founder HSB stock for generating the new cultivar. This founder stock will consist of F3-generation BC hybrids that are genetically >94% striped bass based on average proportions of striped bass and white bass alleles. With the founder stock and these advanced molecular tools in hand, we should be able to make continued rapid progress in establishing of a true breeding HSB cultivar with superior performance characteristics.