The environmental control of hatching in Fundulus heteroclitus

摘要: Salinity, pH, dissolved oxygen, hydration, and temperature were examined as possible environmental cues that might intiate hatching in Fundulus heterolitus. Incubation or transfer to water adjusted ranges of salinity, within the physiological range species had no direct effect on hatching. Eggs incubated with oxygen concentrations greater than 6 ml O2/L solutions Carbowax PEG 4000 producing an osomotic flux out eggs delayed indefinitely. air hatching, regardless pO2. for periods up 1 mo by incubation highly oxygenated hatched normally when placed 4 less. Additionally, partially dehydrated did not hatch a pressurized container mineral oil. These results indicate both low concentration are necessary occur. Both these conditions likely exist field stranded immersed water.