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Newmarket Deputy Chief Jin was presented with 20year service medal Mayor Tom at town coun cil meeting last week The deputy chief has been employe by the town for nenrly years WATER 85 DEGREES Heat wave kills fish BY ALLAN WA1NIO District Biologist of Lands and Forests To many fish in Lake the heat wave that has just past was a killer liar with socalled winter kills of fish These occur in ponds and lakes when a thick layer of snow and ice prevents penetration of lievc that this fish dieoff can be attributed to the sudden heat wave that spread over much of South ern Ontario during the past Previous to this heat onslaught the weather had been relatively cool and thus the fish in shallow waters were acclimated to fairly moderate tempera tures The temperature a suddenly and ra tion and subsequent I suffocation Summerkills oc cur as well During the past two weeks a summer- kill of fish took place in Lake Simcoe Such catas trophes as this arc known to happen in many shallow weedfilled lakes during the hot still nights of July and August SUDDEN CHANGES Although fish arc uninsulated from their en vironment and maintain a constant temperature with it this docs not mean that they can withstand sudden high and low temperature changes The first report of dead fish floating on the surface of Lake far from shore came from resi- the week following this news calls and reports from all around the lake but especially shores flooded the District Office and the Lake Simcoe Fish Management Unit Of fice at Point Park On July 15 fishery personnel from the Fish Management Unit investi gated by boat the extent of the dieoff by observing dead fish along the south and cast shores from Cook Bay to Point near About to of the fish noted were trout perch a small chubby min nowlike fish that is com mon in Lake Simcoe SOME WALLEYE bass were fairly common A few bass and walleye were also found Most of these species arc warm water fish which generally inhibit shallow face On the particular day of the investigation the sur face water temperature was at Point Near and Port Bolster some dead gulls were reported by in terested people Two gulls each of were sent to University for analysis to learn if any disease or pollution may have killed them The surface layer of water became quite warm and reached levels of over which are lethal to many fish At this tempera ture level more oxygen is also liberated from the subjected to content of oxygen as i as lethal high temperati During such heat periods fish may be gasping for air at the surface early in The prevailing winds in the Lake Simcoe and for this reason mo the fish were eventually washed ashore along the cast and south sides of As i fish passes accumulated along the shore many cottager daily raked them up a ting rid of them Countless have died but then many more to replenish the lake with their progeny fish i immediately concluded one area of the lake and there would have been a g rater variety and size of fish show up This proba bility is not being ignored for fish samples are being spring or early dieoff of fish occurs almost annually amongst the ale- wife in Lake Ontario When these fish leave the d cooler waters to a near shore they often counter warm surface water which proves to lethal At spawning tu they are much weaker a die sooner from any sudden changes in temperature During these be u tiful but hot nature sometimes ca very harsh and cruel Open Mondays