The Newtown bee., 1905-07-21

degrees the eggs hatch in four or five
 days, the higher the temperature the
 more rapid the development. A tenn.
 perature much below 59 degrees is ia.
 tai, and should the eggs be killed, the
 male deserts it's nest. It was found
 that eggs which had been deposited in
 temperature of GA degrees, and had
 developed in that temperature for a
 period of thirty-six hours, would en.
 dure fall of five or six degrees and
 finally hatch, while newly deposited
 eggs in falling temperature of cor
 responding range were killed. Should
 the temperature remain much below
 60 degrees for several days, all further
 spawning will cease until the tempera-
 ture again rises to above 60 degrees.
 When the eggs hatch the young fish
 are almost colorless, and are provided
 with yoke-sacks which contain nourish-
 ment sufficient to carry the fish until
 fully developed and ready to take food
 through the mouth. During this per-
 iod the young fish remain scattered all
 through the gravel. Individuals can
 be seen to swim up few inches from
 the gravel, then gradually sink back again where they remain quiet for a time. AS the development progresses this activity increases, the fish gradu- ally take on color which finally be- comes black when the yolk-sack is ab- sorbed. The fish are now sufficiently developed to take nourishment through the mouth, and they rise from the gravel and swim about in the immedi- ate vicinity of the nest in search of food. Just before the school rises we place screens in the spawning boxes and thus corral them, otherwise they would soon swim out of the nest box and could not be caught. The young fish are now transferred to large tanks where they are supplied with food. In the wild state the male fish continues to guard the school for several days. The young fish make rapid growth when their natural food is abundant. They soon become very active and in a few days are able to look out for them selves, when they arelfnally deserted by the parent fish.
 The male now prepares another nest and proceeds toraise up another family. When this is accomplished he is quite likely to prepare nest for the third time, and if spawning females are still available, proceed to rear third fam fly, and in one instance at the hatch cry, the fourth family.
 During the spawning season, which continued for period of 49 days, it l was estimated that over four hundred | thousand fry were produced. There 1 was no time to count this vast num- per of young fish.
 The fry of each period were placed l n large stone tank, where they soon l became quite evenly distributed through the water.
 Several disinterested persons gave us what in their opinion was the average mount of space occupied by each ln- lividual fish, and by computing the water capacity of the tank we were ble to get some idea of the number f fish matched. The fry were held in he tank for about two weeks, ana iberally supplied with food on which hey made rapid growth. As the oung fish had become very active, and 'e had protected them fully as long as he parent would in the wild state, , lost of them were planted.
 Sixteen thousand of the fry were t laced in two divisions of the hatchery, nat were designed for nursery ponds, | nd were liberally supplied with food. f 7hen they had made growth of one | nd one-half inches it was found their f emand for food was more than we ,uld supply, so 5000 were taken out h Id planted. Other plants were made e