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Effects Of Salinity On Survival And Growth Of Postlarval Penaeus Vannamei, John T. Ogle, Kathy Beaugez, Jeffrey M. Lotz
Effects Of Salinity On Survival And Growth Of Postlarval Penaeus Vannamei, John T. Ogle, Kathy Beaugez, Jeffrey M. Lotz
Gulf and Caribbean Research
Eight and 22-day-old Penaeus vannamei postlarvae were exposed to several salinities for 24 hours and 120 hours by direct transfer from 32 ppt salinity to lower salinity waters. The challenge study included six experiments conducted on 8-day-old postlarvae (PL-8) and five experiments conducted on 22-day-old postlarvae (PL-22). Each experiment consisted of ten replicates of ten animals each. Shrimp were held in 1 L plastic containers with 500-ml of seawater. Lowered salinity resulted in lower survival for shrimp of both ages. Longer exposure time resulted in lower survival for shrimp of both ages. Younger shrimp exhibited lower survival than older shrimp. …
The Effect Of Salinity On Spawning Frequency Of Penaeus Setiferus In Aquaria, John T. Ogle
The Effect Of Salinity On Spawning Frequency Of Penaeus Setiferus In Aquaria, John T. Ogle
Gulf and Caribbean Research
Penaeus setiferus were matured and spawned in a small 120L tank system in the absence of males. No significant differences in the number of shrimp that spawned or the time required to spawn were detected for shrimp held at salinities of 20, 25 or 30 ppt in either natural or artificial seawater. The earliest that spawning occurred was an average of 17 days past ablation and as late as 28 days past ablation. None of the shrimp held in artificial seawater at 20 and 25 ppt spawned in the same molt cycle in which they were ablated, while one third …