Name: -
Ludwig , Gerald M
Title:
E-mail: 
Department: Harry K. Dupree Stuttgart National Aquaculture Research Center
Organization: USDA Agricultural Research Service
Address 1: 2955 Hwy. 130 E
Address 2: Stuttgart, AR 72160
Phone Number: (870) 673-4483 ext. 238
Fax Number: (870) 673-7710
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Areas of Specialization/Research
Research Project
Improving the Production Efficiency and Sustainability of Morone Species Culture
Objective
- Develop and refine year-round production of hybrid striped bass fingerlings.
- Increase production efficiency through physiological manipulations.
- Increase production efficiency of hybrid striped bass through nutritional manipulation.
- Develop genetically improved Morone species.
Approach
- Evaluate photothermal manipulation and hormonal stimulation to induce off-season spawning of Morone sp.
- Evaluate the effects of stocking density, feeds and feeding strategies, and environmental conditions on survival and growth of hybrid striped bass and fingerlings in tanks/ponds.
- Characterize the physiological stress response to production practices with respect to environmental, nutritional, and genetic factors.
- Characterize gender-related production characteristics and develop methods of sex reversal to produce monosex populations.
- Determine conditions that increase growth-promoting actions of growth factors such as growth hormone, and insulin-like growth factors.
- Determine the nutrient digestibility of traditional and alternative feed ingredients to replace fish meal.
- Determine or refine nutrient requirements for different life stages and production systems.
- Use phenotypic and genotypic characters to evaluate new strains for economically revelant traits.
- Identify phenotypic and molecular differences among stocks of white/striped bass.
- Implement a selective breeding program to produce progeny with desired traits.
- Develop molecular markers for economically relevant traits to aid selective breeding efforts.
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