Scrubber_steve
2500 Club Member
Just decided to start hatching brine shrimp & wondered what influence light might have on hatching success. After finding one experiment that concluded the following -
Surprising result as I had read that a permanent light was a necessity. So I looked further & found this very informative paper -
Effect of Light Colour, Timing, and Duration of Light Exposure on the Hatchability of Artemia Spp. (Branchiopoda: Anostraca) Eggs
https://academic.oup.com/jcb/article/36/4/515/2735716
Our aim was to determine the minimum duration of light exposure needed to achieve maximal hatching, and to assess if there is different sensitivity to light at different phases of the incubation process for hatching.....
We found that in general white or blue light resulted in higher hatching output than red light, and in general a light exposure of 6h (or even less, depending on the strain and the light colour) from the start of incubation onwards resulted in maximal hatching. Extension of light exposure over a continuous 24 or 48h period resulted in only limited increase in hatching.
In another experiment we investigated at which stage of the incubation for hatching a relatively short exposure of 1h has maximal effect. The observation period was prolonged to 72 h.
We found that 1h of white light was most effective when supplied during the 4th hour of incubation and suboptimal when supplied earlier (1st hour) or later (8th hour, and especially the 13th hour).
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- Hatching viability higher in dark environment (90% viability), next highest in 24-hour light (55%) and least in natural light (30%)
Surprising result as I had read that a permanent light was a necessity. So I looked further & found this very informative paper -
Effect of Light Colour, Timing, and Duration of Light Exposure on the Hatchability of Artemia Spp. (Branchiopoda: Anostraca) Eggs
https://academic.oup.com/jcb/article/36/4/515/2735716
Our aim was to determine the minimum duration of light exposure needed to achieve maximal hatching, and to assess if there is different sensitivity to light at different phases of the incubation process for hatching.....
We found that in general white or blue light resulted in higher hatching output than red light, and in general a light exposure of 6h (or even less, depending on the strain and the light colour) from the start of incubation onwards resulted in maximal hatching. Extension of light exposure over a continuous 24 or 48h period resulted in only limited increase in hatching.
In another experiment we investigated at which stage of the incubation for hatching a relatively short exposure of 1h has maximal effect. The observation period was prolonged to 72 h.
We found that 1h of white light was most effective when supplied during the 4th hour of incubation and suboptimal when supplied earlier (1st hour) or later (8th hour, and especially the 13th hour).
.
