Wallace E. Jenkins

Cultured shortnose sturgeon juveniles, age 11-330 days, were exposed to different salinity (0-35 ppt) and dissolved oxygen concentrations (2.0-5.0 mg/liter) in a series of experiments designed to examine tolerance levels. Tolerance to increased salinity improved with age. Fish 76 days old experienced 100% mortality in a 96-hour test when exposed to salinities ≥15 ppt while 330-day-old fish tolerated salinities as high as 20 ppt for a duration of 18 hours but exhibited 100% mortality at 30 ppt. Younger fish were also more susceptible to low oxygen concentrations than older fish. In a 6-hour...

Two nursery trials were conducted in 0.I-ha ponds to examine effects of density on production of juvenile reciprocal cross hybrid striped bass (female Marone chrysops x male M. saxatilis). In 1986, 1.4-g hybrids were stocked at 5,000, 10,000 and 20,000 fishlha. In 1987, 1.7-g hybrids were stocked at 12,500, 25,000, and 37,500 fishlha. During the studies, the fish were fed a commercial trout feed (38% protein) several times per day. Aeration and water exchange were provided to maintain satisfactory oxygen levels. After approximately 280 days, fish were harvested. At harvest fish ranged from...

Natural and induced production of striped bass hybrids was examined under controlled tank conditions. Four culture female F1 hybrid bass (striped bass, Morone saxatalis x white bass, M. chrysops) received human chorionic gonadotropin (HCG) and ovulated, but only 2 spawned eggs. These eggs, deposited in fresh water, were fertilized by HCG-treated cultured male F1 hybrids. One untreated (no HCG) female F1 hybrid which was paired with 2 untreated male F1 hybrids and held in brackish water (13 ppt salinity) also tank spawned and fertilized eggs were produced. This is the first documented case...

There is growing interest in the United States to develop fish farming operations using striped bass (Morone saxatilis) and or its hybrids. In South Carolina an aquaculture model was developed to allow production of pan-size (300-450 g) striped and white bass hybrids within a year. Brood fish are grown in captivity, matured, and spawned out-of-season using controlled environment systems. Small juveniles are produced early in indoor intensive nursery systems for stocking of grow-out facilities at the onset of suitable outdoor rearing conditions. Testing of model components indicated that...