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Not to be quoted without specific permission from issuing office. LIDRARY ism o Trig 8NVtRoNg 1 Y1Istlicktrld 64 KM* *'r. ANN'S NI+LB. DEPARTMENT OF FISHERIES OF CANADA REPORT OF RESOURCES DEVELOPMENT BRANCH NEWFOUNDLAND REGION FOR 1968 ST. JOHN'S, NEWFOUNDLAND MARCH, 1969 (i) CONTENTS Page INTRODUCTION 1 BIO-ENGINEERING INVESTIGATIONS 3 Exploits River Development Program 3 Noel Fauls Brook Development 3 Controlled Flow Spawning Channel 3 Annual Channel Escapements 3 Egg Deposition, Fry Production and Distribution 5 River Assessments 6 Fence Census, Lower Noel Fauls Brook 6 Electrofishing Studies, Noel Fauls Brook 6 Pollution Investigations 7 Exploits River 7 Mine Wastes 8 Pulp Mill Waste 9 Red Indian Lake 12 Hydroelectric and Other Industrial Developments 15 Bay D'Espoir Power Development 15 Come-by-Chance Water Supply 15 Stephenville Area Water Supply 17 BIOLOGICAL SECTION 19 Development Unit 19 Indian River lroject 19 Controlled Flow Spawning Channel 19 River Population Assessment 19 Greenland Salmon Fishery Investigations 22 Pollution Control Unit 25 Iron Ore Company of Canada - Labrador City, Labrador 25 Wabush Iron Ore Company - babush, Labrador 27 Page Whalesback Project, BRINEX - Near Little Bay, N.D.B. 27 Gullbridge Mines Limited - South Brook 27 Consolidated Rambler Mines Limited - Baie Verte Peninsula 28 Electric Reduction Company of Canada Limited - Long Harbour 29 Newfoundland Pulp and Chemical Company - Come-by-Chance 30 Linerboard Kraft 1-ulp Mill - Stephenville 30 Bowaters Newfoundland Limited - Corner Brook 31 Insecticide Spraying 34 DDT Spraying for Biting Insects 34 Hemlock Looper Control Program 37 Caged fish 37 Wild fish 39 Bottom invertebrates 39 Drifting insects 39 Emerging insects 39 Water Chemistry 41 Conclusions 41 Lake Management Unit 42 Sport Fishery Investigations 42 Population Estimates 42 Creel Census 42 Limnological Studies 45 Growth of Avalon Peninsula Trout and Ouananiche 45 Petty Harbour Long Pond 45 Terra Nova Lake Investigations 46 1969 Program 48 Special Projects Unit 49 Obstruction Survey 49 Fishway Counting Trap Data 49 Seismic Exploration Investigations 54 Oyster Introduction Investigations 54 Port aux Basques Drift Net Fishery 56 ENGINEERING SECTION 57 Special Projects Unit 57 Page Facilities for Greenland Salmon Fishery Investigations 57 Indian River Counting Fence 59 Indian River Controlled Flow Spawning Channel 59 Salmon Brook, Hare Bay 59 Harry's River 59 Exploit's River, Noel Fauls Counting Fence 59 Preliminary Engineering Surveys 60 Grey River Gauging Station 60 Sheffield, Hinds, and Little Grand Lakes Level Restorations 60 Granite Lake Brook Dam 61 1969 Engineering Program 61 Development and Pollution Control Unit (Engineering Section) 61 SUMMARY 62 INTRODUCTION During the past three to four years, in particular, this Frovince has been experiencing an upsurge in water use problems - due to such things as water supply for industry and proposed industry, related pollution and potential pollution problems, large scale hydro development, and the general problems concomitant with "catching up" with the rest of the industrialized Western world - such has perhaps taken place in other parts of Canada over a period of decades. The resulting burden on our staff and facilities has been great. Add to this what appears to threaten as over-exploitation of the salmon resource both in local and "distant" waters and the difficulty of adequately handling our major problems comes into focus. To further compound the situation, admin- istrative work has greatly increased its demands on the time of Branch staff at senior and intermediate levels by virtue of changes which have been occurring in our budgetting, accounting, and personnel procedures. Thus it is that, notwithstanding the obvious necessity to move away from an atmosphere of crisis to one of better reasoned programming and planning, it seems overly optimistic to expect that such a desirable state is likely to be arrived at soon. Notwithstanding the constraints mentioned, worthwhile progress was made in a number of areas, to some of which reference is made following. We take some credit, for instance, in having contributed to forestalling the use of DDT on some hundreds of square miles of our forest area (with consequent effect on aquatic fauna) and the substitution therefore of the less damaging pesticides Sumithion and Fhosphamidon. Our follow-up studies on the spray program demonstrated their lesser adverse effect (as compared with DDT) on aquatic fauna. Due to last minute changes in, and additions to, the spray area, our evaluations were less thorough than planned but enough information was gained to demonstrate the superiority in this regard of these chemicals. Re- grettably, our biologist assigned to spray programs left our employ at the end of the field season and will probably have to be replaced by someone with lesser experience in that area of investigation. Much larger scale spraying appears to be "in the works" for 1969. In its first year of operation, our spawning channel at Noel Fauls Brook gave an encouraging fry survival of 53 percent, this being considerably in excess of what might be expected in a completely natural environment. The concensus appears to be developing amongst those of our staff that have been associated with our spawning channels that, for maximum effectiveness, the fry production from such channels requires distribution to suitable rearing areas. In 1968, the Branch was able for the first time to assign one man (a student) to make a beginning on collecting data on the Fort-aux- Basques drift net fishery requisite to evaluating the effects of this -2- fishery on Atlantic salmon stocks. It was just a beginning but, in co- ordination with local F.R.B.C. personnel, it is hoped that some increased effort can be assigned in 1969. A report has been compiled on our 1968 data and should be available shortly. Due to problems of multiple resource use, and dual jurisdiction (federal and provincial), our proposed Exploits River Development Program (except for the Noel lauls Brook Channel) has not moved appreciably in the past year. Iroblems here relate to the ultimate fate of the river as a Iroducer of fish; as a receptacle for domestic, pulp and paper, and base metal concentrator wastes; and as a source of hydroelectricity. These require to be solved before long range plans for salmon development can be confidently undertaken. A significant beginning was made in 1968 on construction of facilities on Sandhill River in Labrador to enable annual tagging of some 10,000 smolts which, when released, will help in the resolution of problems associated with the commercial fishery for Atlantic salmon in Greenland. About three fifths of our "fence" was completed in 1968, the remainder will be in 1969. Lven so, it is planned to initiate smolt tagging on that river in this year. This, except for some adult follow-up in 1969, will enable us to phase out the interim tagging site at Salmon River in northern Newfoundland. Due to the departure of one of our "lakes" biologists in mid- season, it was not possible to get two investigating teams in the field on "lakes" in 1968 as planned. A new graduate, due to arrive in June of this year, should enable us to partially fulfill this "two-team" ambition in 1969. We were fortunate in early 1969, in filling our Senior Biologist position with an able and experienced person, Mr. h. E. Cutting. His contribution to our work, especially insofar as Branch administration is concerned, has been invaluable. These brief comments touch only on some of our more notable work areas. These, and many others, receive somewhat more attention in the main body of our Annual Report. All of our work, whether at Regional HQ or in the field, has been greatly furthered by assistance from other Branches, and in particular by the four District Officers and their field staffs. 3 BIO-ENGINEERING INVESTIGATIONS Exploits River Development Program The Exploits River drainage constitutes the single largest potential for Atlantic salmon on the Island of Newfoundland. Only about 20 percent of its 4,400 sq. mi. drainage is now developed for salmon. Biological and engineering studies have been carried out for several years to define the best approach to the use of the remaining untapped salmon potential. Basically, the drainage is divided into three parts by two obstructions to fish migration located on the main river. Salmon accessibility currently extends inland as far as Grand Falls. The present salmon development program is directed toward the establishment of sea-run salmon in the 1,400 sq. mi. of drainage between Grand Falls and the impassable dam at the outlet of Red Indian Lake. As successful salmon populations are developed in that area, the program may be continued to include development of the significant salmon potential located beyond Red Indian Lake, In 1968, a portion of the headwater of a major Exploits River tributary (Victoria River) was diverted into the Bay D'Espoir Power Development. This diversion, as well as a second one under consideration (if implemented), will affect discharges in the lower river by reduction of available storage. These reduced flows will decrease dilution of the pollutants from the Grand Falls area, quite possibly resulting at times in stream conditions less suitable for fish life than those that now exist. Efforts directed toward prevention of such deterioration of water quality require the cooperation and coordination of both Federal, Provincial, and private agencies. Realization of the full salmon potential will require coordinated efforts in the fields of fish passage techniques, water flow control, pollution control, fish cultural practices, and fish population manipulation. Noel Fauls Brook Development Controlled Flow Spawning Channel Annual Channel Escapements. During 1967 and 1968, adult Atlantic salmon were transferred by tank truck from Adies Stream on the Upper Humber River to Noel fauls Brook Controlled Flow Spawning Channel situated on the upper part of Noel Fauls Brook (Fig.