. Rod and gun . very egg within box is kept carefully<:overed during the whole ofthe incubation period, aslight is distinctly favorable to the growth of fungi. Thedepredations of certainsmall creatures, such as cad-dis-worms, have also to beguarded against, as it is sur-prising how these find en-trance to the boxes in spiteof all precautions. In about ten days afterfertilization the young fishbegin to hatch out. Theygenerally come out tail first,and in their endeavors toescape from the ova causethese to move about thebottom of the grill. Whenfirst hatched the young fishhave a larg
. Rod and gun . very egg within box is kept carefully<:overed during the whole ofthe incubation period, aslight is distinctly favorable to the growth of fungi. Thedepredations of certainsmall creatures, such as cad-dis-worms, have also to beguarded against, as it is sur-prising how these find en-trance to the boxes in spiteof all precautions. In about ten days afterfertilization the young fishbegin to hatch out. Theygenerally come out tail first,and in their endeavors toescape from the ova causethese to move about thebottom of the grill. Whenfirst hatched the young fishhave a large, somewhattranslucent protuberance onthe under surface. Thisstructure is the umbilical, oryolk-sac, and contains fatglobules, which sustain thefish for about the first fortnight of itsexistence. As long as it retains this sac,it is known as an alevin. When theyolk-sac has been completely absorbedthe fish attains the normal adult appear-ance and is then known as a fry. Atfirst the young fish pack together at the. The Fry Pond. FISH CULTURE IN NEWFOUNDLAND. 409 bottom or ends of the tray, but they soonbegin to swim about vigorously and todart at any particles of food that may beintroduced into the box. The food pro-vided is pounded shrimp or liver, orgrated cod-roe, care being taken to re-duce the food to as small particles aspossible. It is advisable to provide asgreat a variety of food as possible, andsome possible alternatives to the articlesmentioned are dog biscuits and the hard-boiled yolks of eggs. As some of the foodplaced in the water is bound to escapethe fry and sink to the bottom, someprovision has to be made to prevent itfrom decaying and working injury to theyoung fish. This is done by throwing alittle mold, such as is found at the bottomof a sod, into the water. The result isthe deodorisation of the water. The de-caying food at the bottom is also coveredup, while the young fry seem to attainnew vigor from this dose of mud. Thistreatment should be given at least on
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