. First report of game and fish warden for New Mexico. 1909-1910-1911 . f water as the locality may afford. It Avould really bebetter in many cases to alloAV the ncAv dam and pond area to stand and settle for afeAv months or even a year. HoAvever, this is not necessary, as it is possible to fillueAv-made pond Ijasins as soon as they are finished. Before the Avater is turnedonto the ground that is to serve as the bottom of the ncAvly-made pond it shouldbe carefully examined for sandy, gravelly or porous places. There .should be natural or scooped-out places in every fish pond not lessthan six f
. First report of game and fish warden for New Mexico. 1909-1910-1911 . f water as the locality may afford. It Avould really bebetter in many cases to alloAV the ncAv dam and pond area to stand and settle for afeAv months or even a year. HoAvever, this is not necessary, as it is possible to fillueAv-made pond Ijasins as soon as they are finished. Before the Avater is turnedonto the ground that is to serve as the bottom of the ncAvly-made pond it shouldbe carefully examined for sandy, gravelly or porous places. There .should be natural or scooped-out places in every fish pond not lessthan six feet in depHi (8 or 10 feet Avould be better) ; Avater on the Ijottom of apond remains more even in temperature than that on the surface. The deeperholes in a pond provide cool places for the fish to rest in during the hot siimmerAveather. It also furnishes them places of retreat where they can bed Avith moresafety Avhen the Aveather is cool and Avhen the pond is covered Avith ice in thedead of Avinter. Unless the fish are surrounded l)y plenty of Avater at such times. «o REPORT OF GAME AND FISH WARDEN FOR NEW MEXICO. 31 they may die Ior want of air. For many years wc have noticed that many iishtliat liave been bedded, either from necessity or l)y accident, in shallow water—water that was not more than one to two feet in depth—have died during thewinter. Tliey seem to become very numb and nearly frozen, so to speak, andapparently die for want of air; in this weakened condition they seem to be moresusceptil)le to the attacks of the white fungus disease which, under such con-ditions, sometimes kills off great numbers of fish. While spring water is usually considered to be very fine for iish. it is, per-haps, the poorest of all waters when it comes to furnishing the fish with foodsupplies. It contains practically no fish-food material, and Avhen it comes fromthe ground is poorly supplied with air. It can he much improved and suppliedwith both food and air by carrying it for gr
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