Lethbridge Herald, The (Newspaper) - April 4, 1973, Lethbridge, Alberta
Fish in southern Alberta's lakes, reservoirs and ponds wintered well, with two ex- ceptions. All the trout were lost in the Blairmore Chil- dren's Pond and the Coleman Fish and Game Association Pond. Duane S. Radford, regional fisheries biologist, has issued this report: "Shallow productive lakes in southern Alberta, and else- where in the temperate zone, are frequently but unpredict- ably subject to low concentra- tions of dissolved oxygen under the ice (and at other times) which may cause large die-offs (winterkill) of fish. Such low levels of oxygen are brought about by decomposi- tion of organic matter and respiration of animals (e.g. fish) under the ice. Be- cause atmospheric oxygen cannot be exchanged under these circumstances, if the photosynthetic proc ess of plant life which produces oxygen) is inhibited by a ab- sence of light penetration, a gradual oxygen will occur. If levels of oxygen fall below certain critical levels winterkill will occur. "For these reasons person- nel of the fish and wildlife division annually determine the amounts of dissolved ox- ygen during ths winter in a number of lakes stocked with trout. Trout are more suscep- tible to low levels of dissol- ved oxygen than are other species of game fish. In co-operation with district fish and wildlife officers tests for oxygen concentra- tions of 27 lakes and reser- voirs were recently complet- ed. We found that the amount of oxygen was satisfactory to overwinter trout in all waters except for the Blairmore Children's pond and the Cole- man Fish and Game Associa- tion Pond. A complete die-off of trout can be expected in both of these waters. Although there is a slight possibility of some winterkill Gold- springs Park Reservoir and Bathing Lake I doubt that this will occur. There should be no winterkill of trout in any of the following lakes and reser- voirs: Ma mi and pohce Lakes, St. Mary PFRA Proj- ect, Chain Lakes, Henigefs and Foremost Reservoirs, Hen- derson and Tyrell Lakes, Taber Fish and Game Asso- ciation Pond, Cavan, Reesor, and Spruce Coulee Reservoirs, Allison (Chinook) Reservoir, Beauvais, Beavermines, Bur- Wheat Pool refunds top ilKon m CALGARY (CP) The Al- berta Wheat Pool has made patronage refunds to members totalling for the 1971- 72 crop year. The refunds consisted of 37, 500 cheques totalling more than and reserve credits exceeding The pool refunds 4734 cents a bushel on principal grains with 1.5 cents in cash and the rest In reserves. On chemical purchases, members get four per cent of the dollar value with 1.75 per cent in cash and on fer- tilizer, they get two per cent in reserves. Edmonton police action upheld in Kosygin case OTTAWA (CP) Edmonton police acting within their authority in restricting access to public streets during the Oc- tober, 1971, visit of Soviet Pre- mier Kosygin, the Supreme Court of Canada rated here. "These official authorities were "not only entitled but in dulv bound, as peace officers, to prevent 3 renewal of a sec- ond criminal assault on the per- son of Premier Kosygin during his official visit to the court said in upholding a con- viction of obstructing a peace officer against Edgar John fijKreilton of Edmonton. Krunriion. who practised pho- tography as a hobby, refused to obey police orders not to enter a cordoncd-off area near an Ed- monton hold during the Rus- sian leader's visit He lold police he ranted to taic pictures for his own satis- faction sad for a University of Alberta publication. An earlier assault, committed on Parliament Hill in Ottawa, was televised across Canada ?nd Edmotrton police were jus- tified in taking steps they did to prevent a second such act, the court said. mis, Crowsnest, Island, and Lees Lakes, Lang's Reservoir, and the Pincher Creek Chil- dren's Pond. Wedneiday, April 4, 1973 THE LETHBRIDGE HERALD 37 PUPFISH SURVIVED CONTACT WITH MAN SACRAMENTO, Calif. (AP) California scientists are ac- claiming the return of a tiny desert fish thought for 20 years to be extinct but now flourish- ing in three carefully guarded pools. The Owens pupfish survived for eons in a changing environ- a vast inland lake to a string of shallow desert pools where water temperatures may vary between freezing and 100 it nearly did not survive its brief contact with modern man. The Owens natural range was only about 70 miles along the bottom of the narrow Owens Valley, north- west of Death less than tw_o inches long. Plentiful as recently as 50 years ago, the fish were vir- tually wiped out by the intru-. sion of modern man, who drained their habitats and in- troduced alien species of fish that ate both the pupfcVs food and the pupfish. The fish was considered ex- tinct until 1956, when several hundred were discovered in a pool fed by overflow from a spring-fed drainage ditch. Now the state has established a pupfish refuge in the area with a pupfish population of more than How many ways canyou save at TipTbp: Our 'Extra-Value' suits have made us famous for saving you money. You know you're get- ting the best suit value you'll find anywhere. But at Tip Top, 'more-for-your-money' doesn't stop at the suit rack. As a matter of fact, on just about any item in our stores we can promise better quality at a lower price than anybody else. Sweater and slacks. Terrific looks. Terrific values. Start with a sweater, the key element in any casual combination. 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