RAISING TROUT FRY
NEW METHOD TESTED Experments being carried out at Masterton by Mr J. Henderson, curator of the Wellington Acclimatisation Society's hatcheries, may prove important to fish culture in New Zealand. They involve the use of a Vibert box, a small plastic container with all sides slotted, like miniature oblong windows in a four-storey building. From 600 to 1000 trout ova are placed in the container which is planted in gravel in a stream in a situation similar to that chosen by trout themselves for depositing ova. The box protects the ova during a vital stage of development until the alevin, the young fish carrying the yolk sac, leaves the container to remain on the gravel bed till the yolk sac is absorbed. Under this scheme ova is kept in the hatchery uriti! it becomes "eyed," usually a matter of 18 to 20 days, before being placed in the cpntainers. The great advantage claimed is that "wild" ova is thus widely distributed in suitable water, instead of hatchery-reared fry being deposited in bulk in restricted areas. The much easier method of transfer when putting ova out is claimed to be a tremendous advantage.
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https://paperspast.natlib.govt.nz/newspapers/TAUTIM19531009.2.25
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Taupo Times, Volume II, Issue 90, 9 October 1953, Page 5
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194RAISING TROUT FRY Taupo Times, Volume II, Issue 90, 9 October 1953, Page 5
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