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Full-Text Articles in Marine Biology
A Study Of Factors Influencing The Hatch Rate Of Penaeus Vannamei Eggs. I. Effects Of Size, Shape And Volume Of The Spawning Tank, John T. Ogle
Gulf and Caribbean Research
The hatch rate of Penaeus vannamei eggs spawned by individual females in square and round tanks and in different volumes of seawater was determined. The mean hatch rates ranged from 17.3% to 64.9% and were not significantly different for volumes of 50, 100 and 200 L nor for square or round tanks of equal water volumes. Hatch rate was significantly affected by the size of the spawning tank.
A Study Of Factors Influencing The Hatch Rate Of Penaeus Vannamei Eggs. Ii. Presence Of A Spermatophore, John T. Ogle
A Study Of Factors Influencing The Hatch Rate Of Penaeus Vannamei Eggs. Ii. Presence Of A Spermatophore, John T. Ogle
Gulf and Caribbean Research
Eghty-three mated Penaeus vannamei females were sourced from a commercial sized maturation tank. The hatch rate was recorded for those shrimp based on the presence of a full spermatophore, a partial spermatophore or the loss of the spermatophore during sourcing and handling. The hatch rates were not significantly different among females for the three spermatophore conditions. The mean hatch rates were 48.8% for full spermatophores, 43.1% for partial spermatophores and 55.6% for lost spermatophores. The location of the sperm at fertilization and the precise mechanisms of fertilization are still unknown.