Commercial off-bottom aquaculture of the eastern oyster Crassostrea virginica is challenged by repeated summer mortality events that appear to affect triploid oysters disproportionally. Many farmers believe common farming practices, especially when performed during hot months, may increase mortality. The goal this study was investigate how diploid and react stressors imposed farmers: tumbling s...

The purpose of this study was to determine whether triploid salmonid fishes differ from diploids in their hematological and physiological responses to an acute handling and confinement stress, induced by netting fish from their tanks and placing them in a bucket. Blood samples were Ž . collected from fish prior to the handling stress and at either 30 min rainbow trout or 20 and 40 Ž . min brook...

Infertility control of fish has been a significant research problem concerning many aquatic breeders. It is necessary to develop infertility technology for solve the ecological safety problems existing transgenic with qualified characteristics. We reviewed here implementation intensely studied available technologies (e.g., triploid and antisense RNA technology), kid/kis system, Ntr/Met Gal4/UAS...

Tetraploid Crassostrea gigas were first successfully produced in 1993 by inhibiting the first Ž polar body of eggs from triploids that had been fertilized with sperm from diploids Guo and . Allen method . However, attempts to repeatedly produce high yields of tetraploids were inconsistent. Because of these uncertainties, we examined some of the fundamental aspects of tetraploid production in an...

Triploid oysters are widely used in off-bottom aquaculture of eastern oysters, Crassostrea virginica. However, farmers the Gulf Mexico (GoM) and Atlantic coast estuaries have observed unresolved, late-spring die-offs triploid threatening sustainability aquaculture. To investigate this, physiological processes underlying oyster growth (e.g., feeding, respiration) mortality one-year-old diploid w...