Use of Luteinizing Hormone Releasing Hormone Analog and Human Chorionic Gonadotropin to Spawn Early‐Egg‐Stage Striped Bass

Yeager, David M.

doi:10.1577/a05-064.1

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…In order to meet hatchery goals, brood fish collection often extends beyond the peak in natural spawning. Brood fish collected outside of peak spawning often produce inferior‐quality sperm or eggs (Yeager 1990; Yeager et al 2006) reducing survival to fry stage. Brood fish collection during this study began before peak spawning activity.…”

Section: Discussionmentioning

confidence: 99%

Striped Bass, Morone saxatilis, Egg Incubation in Large Volume Jars

Harper¹,

Wrege²,

Isely³

2010

Journal of the World Aquaculture Society

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The standard McDonald jar was compared with a large volume jar for striped bass, Morone saxatilis, egg incubation. The McDonald jar measured 16 cm in diameter by 45 cm in height and had a volume of 6 L. The experimental jar measured 0.4 m in diameter by 1.3 m in height and had a volume of 200 L. The hypothesis is that there is no difference in percent survival of fry hatched in experimental jars compared with McDonald jars. Striped bass brood fish were collected from the Coosa River and spawned using the dry spawn method of fertilization. Four McDonald jars were stocked with approximately 150 g of eggs each. Post‐hatch survival was estimated at 48, 96, and 144 h. Stocking rates resulted in an average egg loading rate (±1 SE) in McDonald jars of 21.9 ± 0.03 eggs/mL and in experimental jars of 10.9 ± 0.57 eggs/mL. The major finding of this study was that average fry survival was 37.3 ± 4.49% for McDonald jars and 34.2 ± 3.80% for experimental jars. Although survival in experimental jars was slightly less than in McDonald jars, the effect of container volume on survival to 48 h (F = 6.57; df = 1,5; P > 0.05), 96 h (F = 0.02; df = 1, 4; P > 0.89), and 144 h (F = 3.50; df = 1, 4; P > 0.13) was not statistically significant. Mean survival between replicates ranged from 14.7 to 60.1% in McDonald jars and from 10.1 to 54.4% in experimental jars. No effect of initial stocking rate on survival (t = 0.06; df = 10; P > 0.95) was detected. Experimental jars allowed for incubation of a greater number of eggs in less than half the floor space of McDonald jars. As hatchery production is often limited by space or water supply, experimental jars offer an alternative to extending spawning activities, thereby reducing labor and operations cost. As survival was similar to McDonald jars, the experimental jar is suitable for striped bass egg incubation.

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Section: Discussionmentioning

confidence: 99%

Striped Bass, Morone saxatilis, Egg Incubation in Large Volume Jars

Harper¹,

Wrege²,

Isely³

2010

Journal of the World Aquaculture Society

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“…The authors concluded that the use of PIM does not improve the GnRHa treatment and the use of GnRHa alone during the last stages of vitellogenesis is enough to induce final oocyte maturation in European sea bass. Yeager (2006) found that LH-RHa given in combination with HCG could advance oocyte maturation and induce spawn female striped bass Morone saxatilis that otherwise would be considered insufficiently mature for induced spawning. Females with eggs in early stages of development were successfully spawned (18 of 19) after being given a priming injection of LH-RHa followed by a resolving injection of human chorionic gonadotropin (HCG).…”

Section: Induced Spawningmentioning

confidence: 98%

Recent advances in fish hatchery management

Phelps

2010

R. Bras. Zootec.

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The advancement of aquaculture has often been bottlenecked because of the lack of seed, but once that bottleneck was overcome there was rapid growth. Recent examples of advances in hatchery technology leading to increased production are sea bream and Pangasius. Three areas contributing to the advancement of hatchery management are: brood stock management, induced spawning and larval feeding. Formulated diets have been developed for marine brood fish that are equal or better than the traditional raw fish diets. The importance of lipids and their composition in brood fish diets, particularly n-3 HUFAs has received much attention. The lipid composition of the brood diet is reflected in egg composition and egg quality. Protein quantity and quality in brood diets also impacts reproductive success and egg quality. The use of Gonadotropin-releasing hormone agonists (GnRHa) given as an injection or a slow release implant for induced spawning is becoming more widely used. The addition of dopamine antagonists with GnRHa may not be necessary to successfully induce spawn some species of fish. The use of GnRHa can advance the maturation of oocytes allowing such fish to be successfully induced spawned. Significant advances have been made in the development of formulated microdiets for larval fish. Such microdiets have been used successfully with young larvae reducing the need for live foods such as artemia. The quality of both live foods and formulated diets has been enriched with the use of fatty acids. Not only the quantity of n-3 HUFAs added to a diet impacts larval growth and survival but the ratios of specific n-3 HUFAs has an impact. Enrichment of live foods with amino acids can also improve larval fish growth and survival.

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Use of Luteinizing Hormone Releasing Hormone Analog and Human Chorionic Gonadotropin to Spawn Early‐Egg‐Stage Striped Bass

Cited by 2 publications

References 2 publications

Striped Bass, Morone saxatilis, Egg Incubation in Large Volume Jars

Striped Bass, Morone saxatilis, Egg Incubation in Large Volume Jars

Recent advances in fish hatchery management

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