Mortality in Pike-Perch Eggs in Hatcheries
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In the case of the pike perch especially the consequent mortality may. of course, fluctuate from year to year due to such causes as sudden changes of temperature (a sudden change of temperature isi known to materially retard the ripening of the fishes in the pens) and weather conditions which may prevent pulling the nets and therefore postpone examination of the caught fishes. Some specimens do not lay eggs even when ripe under such conditions.
It may be of interest in this connection to give t...he opinions of men who have the supervision of pike-perch hatcheries which are located at Constantia, N. Y., Swanton, Vt., Put in Bay, Ohio, and Duluth, Minn. Their opinions, given in response to a letter of inquiry, are N .- -•.,■•■.• - '... ._■. ;•- ■■■- '•■y / K ■.. •• w •■
What to read after Mortality in Pike-Perch Eggs in Hatcheries?
You can find similar books in the "Read Also" column, or choose other free books by Schrader, Franz, 1891- [from Old Catalog] to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In the case of the pike perch especially the consequent mortality may. of course, fluctuate from year to year due to such causes as sudden changes of temperature (a sudden change of temperature isi known to materially retard the ripening of the fishes in the pens) and weather conditions which may prevent pulling the nets and therefore postpone examination of the caught fishes. Some specimens do not lay eggs even when ripe under such conditions.
It may be of interest in this connection to give t...he opinions of men who have the supervision of pike-perch hatcheries which are located at Constantia, N. Y., Swanton, Vt., Put in Bay, Ohio, and Duluth, Minn. Their opinions, given in response to a letter of inquiry, are N .- -•.,■•■.• - '... ._■. ;•- ■■■- '•■y / K ■.. •• w •■
What to read after Mortality in Pike-Perch Eggs in Hatcheries?
You can find similar books in the "Read Also" column, or choose other free books by Schrader, Franz, 1891- [from Old Catalog] to read onlineMoreLess
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