Supplemental Feeding as a Tool in the Development of a Quality Wild Trout Fishery

2020 ◽  
Author(s):  
Stephen J. Owens
Keyword(s):  
Supplemental Feeding ◽  
Wild Trout ◽  
Trout Fishery

scholarly journals Evaluation of the Berry Creek-Owl Creek Cutthroat Trout Fishery in Grand Teton National Park

1984 ◽  
Vol 8 ◽  
pp. 43-46
Author(s):  
Wayne Hubert
Keyword(s):  
Population Structure ◽  
Life History ◽  
National Park ◽  
Cutthroat Trout ◽  
Fishing Pressure ◽  
Grand Teton National Park ◽  
Baseline Information ◽  
Wild Trout ◽  
Trout Fishery ◽  
Salmo Clarki

Little is known about the wild cutthroat trout fishery of Berry Creek and Owl Creek located in Grand Teton National Park. No baseline information has been gathered on fishing pressure, harvest, population structure or life history characteristics for stocks from either stream. The creeks have a reputation for quality cutthroat trout (Salmo clarki) fishing. Wild trout fisheries are highly susceptible to over-harvest and relatively little fishing pressure can cause stock composition to be dominated by subcatchable-sized fish.

Supplemental Feeding of Spring-Calving Cows on Tall Fescue or Tall Fescue-Red Clover Pastures

1983 ◽  
Vol 57 (3) ◽  
pp. 535-541 ◽  
Author(s):  
J. L. Ellis ◽  
R. E. Morrow ◽  
G. B. Garner ◽  
J. A. Stricker ◽  
M. R. Ellersieck
Keyword(s):  
Tall Fescue ◽  
Red Clover ◽  
Supplemental Feeding

Factors Affecting the Trout Fishery at Grafham Water

1975 ◽  
Vol 6 (3) ◽  
pp. 55-63
Author(s):  
D. FLEMING-JONES ◽  
R. F. STENT
Keyword(s):  
Factors Affecting ◽  
Trout Fishery

Dynamics and Exploitation of Mature Walleyes, Stizostedion vitreum vitreum, in the Nipigon Bay Region of Lake Superior

1968 ◽  
Vol 25 (7) ◽  
pp. 1347-1376 ◽  
Author(s):  
R. A. Ryder
Keyword(s):  
Lake Trout ◽  
Lake Superior ◽  
Total Mortality ◽  
Inland Waters ◽  
Commercial Fishery ◽  
Sea Lampreys ◽  
Wood Fibres ◽  
High Concentrations ◽  
Trout Fishery ◽  
Hexagenia Limbata

Walleye stocks in Nipigon Bay of Lake Superior were homogeneous with those in tributary inland waters but were discrete from Black Bay stocks. Returns from 2200 tagged walleyes in Lake Superior and tributary inland waters between 1955 and 1958 varied from 7.8 to 31.0% for 2 years after release. The commercial fishery in Lake Superior recovered 64.9% of the tags, the sports fishery in inland waters captured 27.6%. Fish tagged in the Nipigon River travelled a mean distance of 11.8 miles from the point of release and were recovered in 191 days (average). Total mortality rates for Nipigon Bay walleyes were 55.0% (1955–57). Mature walleyes on the spawning grounds in the Nipigon River in 1957 were estimated at 22,000, and fish in Nipigon Bay over 14 inches (total length) the same year at 41,000. All male walleyes were mature at 15 inches and females at 18 inches. Walleyes exploitation rates increased with the decline of the lake trout fishery. Wounding and scarring rates by sea lampreys increased during 1955–57 but never exceeded 1.0% on adult walleyes. Severe pollution on the west side of Nipigon Bay originated from a kraft mill. High concentrations of total solids and dense sedimentation of wood fibres created an environment unfavourable to Hexagenia limbata and Pontoporeia affinis. The recent elimination of the walleye fishery in Nipigon Bay is most likely attributable to industrial pollution rather than to overexploitation or sea lamprey predation.

Performance of Indigenous, Exotic, and Hybrid Strains of Brook Trout (Salvelinus fontinalis) in Waters of the Adirondack Mountains, New York

1981 ◽  
Vol 38 (12) ◽  
pp. 1701-1707 ◽  
Author(s):  
Dwight A. Webster ◽  
William A. Flick
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Hybrid Vigor ◽  
Superior Performance ◽  
Adirondack Mountains ◽  
Wild Strains ◽  
Early Fall ◽  
Survival And Growth ◽  
Wild Trout

Eleven year-classes of wild, domestic, and wild × domestic hybrid strains of brook trout (Salvelinus fontinalis) were stocked in a 0.19-ha Adirondack pond. Comparative survival and growth were assessed upon drainage in early fall. Rearing native wild strains to maturity in a hatchery, or domestic strains in a natural environment, did not consistently or materially affect survival of progeny, suggesting that superior performance of wild strains was largely inherent. Interstrain hybrids of wild × domestic showed survivals equivalent to the wild parents, but hybrids of two Canadian strains gave evidence of heterosis in both survival and net yield. Supplementary observations in other waters also indicated that one strain (Assinica) may be less adaptable to Adirondack conditions than the other (Temiscamie).Key words: brook trout, wild trout, domesticated trout, interstrain hybrid trout, survival, growth, heterosis, hybrid vigor

Liver Glycogen Reserves of Interacting Resident and Introduced Trout Populations

1961 ◽  
Vol 18 (1) ◽  
pp. 125-135 ◽  
Author(s):  
P. W. Hochachka
Keyword(s):  
Population Density ◽  
Liver Glycogen ◽  
Salmo Gairdneri ◽  
Recovery Rates ◽  
Introduced Populations ◽  
Wild Trout ◽  
Low Levels ◽  
Glycogen Stores ◽  
Salmo Clarki

Three groups of trout, two introduced populations of Salmo gairdneri and a resident Salmo clarki, were studied in stream sections. Liver glycogen deposits, which were reduced to low levels during transportation to the stream, were restored in 2 to 3 weeks in all groups, with recovery rates being approximately inverse to the population density. Within the hatchery groups, larger fish laid down greater glycogen stores. Wild trout maintained their high glycogen reserves throughout the experiment.

scholarly journals Core area and centre of activity of maned wolves, Chrysocyon brachyurus (Illiger) (Mammalia, Canidae), submitted to supplemental feeding

2004 ◽  
Vol 21 (2) ◽  
pp. 391-395 ◽  
Author(s):  
Joaquim de Araújo Silva ◽  
Sônia Aparecida Talamoni
Keyword(s):  
Kernel Method ◽  
Artificial Feeding ◽  
Core Area ◽  
Frequency Of Occurrence ◽  
Supplemental Feeding ◽  
M Cell ◽  
The Core ◽  
Natural Reserve ◽  
Fixed Kernel ◽  
Chrysocyon Brachyurus

Based on the finding of remains (tracks, scats, and hairs), an analysis was made of the core area and centre of activity of maned wolves, Chrysocyon brachyurus (Illiger, 1815), living in a private natural reserve in which ecotourism activities are developed and these animals are daily fed bovine meat. A total of 465 samples of remains were recorded. Using the fixed kernel method, the area encompassing all samples recorded was estimated at 25.7 km², yet 50% of all samples were found in an area of only 1.5 km², representing 5.8% of the total area covered. For estimating the core area of the animals, the frequency of occurrence of the samples was determined by superimposing a 50 x 50 m cell grid over a map of the area encompassing all recorded occurrences. Based on the cells containing more than six occurrences, the animals' core area was 0.99 km², which included the place where the animals are fed. The centre of activity was located only 0.50 km from this place. The high negative correlation (r = -0.93, p < 0.05) between the densities of the recorded occurrences and the distances from these to the sanctuary indicates that the core area and centre of activity are conditioned by artificial feeding.

scholarly journals DAY-TO-DAY VARIATIONS IN FAT PERCENT OF COW'S MILK

1990 ◽  
Vol 70 (2) ◽  
pp. 731-734 ◽  
Author(s):  
A. S. ATWAL ◽  
J. D. ERFLE
Keyword(s):  
Dairy Cows ◽  
Key Words ◽  
Milk Yield ◽  
Milk Fat ◽  
Rumen Fluid ◽  
Supplemental Feeding ◽  
Fat Percentage ◽  
Milk Fat Depression ◽  
Daily Milk Yield ◽  
Daily Milk

Large day-to-day variations in milk fat, particularly for the morning milkings, were observed in 36 Holstein cows. Changes in percent fat were gradual and produced wavelike patterns in a number of instances. Supplemental feeding of long hay had no effect on acetate/propionate ratio in rumen fluid, daily milk yield or weighted milk fat percentage. Key words: Dairy cows, milk, fat depression, hay

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