The Utah Wildlife Board authorized issuing a limited number of permits for sandhill cranes. The board approved 100 permits for 1988.

Application period for crane permits is July 18-29. A drawing will be held Aug. 12 at 9 a.m. Regulations for the hunt will appear on the mourning dove and band-tailed pigeon proclamation.

The board also set the upland game season for grouse, partridge, pheasant, quail and wild turkey.

Board members voted for a shortened three-day pheasant hunt in Utah County. General hunting dates for upland game hunts for 1988 are:

Sage grouse from Sept. 10-18; forest grouse from Sept. 10-Nov. 30; sharp-tailed grouse season is once again closed statewide; Ptarmigan from Sept. 10 to Oct. 18; chukar partridge from Sept. 10-Jan. 31; Hungarian partridge from Sept. 10-Jan 3.; pheasant from Nov. 5-Dec. 4; quail from Nov. 5-Dec. 31; cottontail rabbit from Sept. 10-Jan. 31; snowshoe hare from Sept. 10-Jan. 31; and wild turkey from May 1-21.

FISH STUDY PLANNED _ The Utah Division of Wildlife Resources is conducting a study of rainbow trout in Johnson Reservoir to determine whether sterile fish grow faster and larger than normal trout, officials say.

Biologists will study growth patterns of 110,000 trout that were stocked in the reservoir during May 1987, spokesman Garth Carter said.

Both sterile trout and normal trout were stocked in the reservoir, near Fish Lake, Carter said.

The fish were sterilized by heat shocking eggs shortly after fertilization, he said. The heat shock interferes with normal egg division, causing it to retain a third set of chromosomes.

"The theory is that sterile fish will grow faster and larger rather than develop sex organs," said Carter. "The study will compare growth rate, catch rate, condition, food habits and abundance of these two rainbow types."

Creel census data is being gathered and Carter said angler co-operation is needed. The study won't interfere with stock rates, and fishing opportunities will remain high.

DOUBLE LIMIT AT HYRUM _ The trout limit at Hyrum Reservoir will be increased from eight to 15 fish between now and July 15. On July 14, the DWR will treat the reservoir and tributaries with rotenone, a naturally occurring toxicant that will kill all the fish, in hopes of eliminating a disease problem in the waters there.

After the 15th, the trout limit will return to eight. Because of the warm temperatures, effects of the rotenone will only last for a few days, after which the DWR will plant the reservoir with catchables. It will also plant bluegill, bass and perch.

In other action, the DWR announced it has also closed the mouth of Swan Creek feeding into Bear Lake, and extending out about 2,000 feet from the inlet until July 15 because Bear Lake cutthroats are still spawning there. Normally, the creek would have opened July 1.