Vertical and Horizontal Distributions of Coho Salmon (Oncorhynchus kisutch), Yellow Perch (Perca flavescens), and Cisco (Coregonus artedii) in Pallette Lake, Wisconsin

1976 ◽  
Vol 33 (12) ◽  
pp. 2710-2715 ◽  
Author(s):  
Sandy Engel ◽  
John J. Magnuson
Keyword(s):  
Vertical Distribution ◽  
Yellow Perch ◽  
Coho Salmon ◽  
Perca Flavescens ◽  
Oncorhynchus Kisutch ◽  
Vertical Separation ◽  
Sunset Yellow ◽  
Coregonus Artedii ◽  
The Vertical Distribution

Coho salmon (Oncorhynchus kisutch), stocked in Pallette Lake, Wisconsin, remained inshore in April and early May, moved offshore in late May and June, and returned to shore in October. From June to September the vertical distribution of offshore coho salmon overlapped that of yellow perch (Perca flavescens) and cisco (Coregonus artedii). Yellow perch were gillnetted mainly in epilimnetic water of 16–22 C; coho salmon and cisco were mostly caught in metalimnetic water of 12–17 and 8–12 C, respectively. Vertical separation broke down during other months of the year.From June to September diel, horizontal movements were found for yellow perch within the epilimnion and for cisco within the metalimnion. Yellow perch moved offshore around sunrise and onshore around sunset; cisco moved toward shore around sunrise and away from shore around sunset. Yellow perch were mainly active during the day and cisco at night. Perch and Cisco were, therefore, largely temporally and spatially segregated from each other but not from coho salmon.

Predicting the Vertical Distribution of Fish Populations: Analysis of Cisco, Coregonus artedii, and Yellow Perch, Perca flavescens

1985 ◽  
Vol 42 (6) ◽  
pp. 1178-1188 ◽  
Author(s):  
Lars G. Rudstam ◽  
John J. Magnuson
Keyword(s):  
Vertical Distribution ◽  
Yellow Perch ◽  
Factor Model ◽  
Perca Flavescens ◽  
Fish Population ◽  
Lake Mendota ◽  
Vertical Distributions ◽  
Preferred Temperatures ◽  
Coregonus Artedii ◽  
The Vertical Distribution

We develop a model based on fish behavior in temperature and oxygen gradients that yields quantitative predictions of the vertical distribution of a fish population throughout the water column. The model was tested against observed vertical distributions of cisco, Coregonus artedii, and yellow perch, Perca flavescens, in 1981 and 1982 from five Wisconsin lakes. In some cases, the model seemed adequate for cisco, but in most cases, they occupied a temperature lower than their final preferendum. Occupation of lower temperature is consistent with a response to less than ad libitum food rations expected in these oligotrophy to mesotrophic lakes. In Lake Mendota, which is eutrophic with an anaerobic hypolimnion, cisco occupied temperatures higher than predicted by the model. For perch distributions, avoidance of high light intensities appears important. We did not observe effects of interspecific segregation between cisco and perch in their vertical distributions beyond that expected from differences in their preferred temperatures. Deviations of actual distributions from predictions of our relatively simplistic two-factor model can be used to help identify and evaluate other important physical and biotic factors influencing vertical distributions.

scholarly journals The vertical separation of fish in the aft end of a demersal trawl

2009 ◽  
Vol 66 (4) ◽  
pp. 772-777 ◽  
Author(s):  
Ludvig Ahm Krag ◽  
René Holst ◽  
Niels Madsen
Keyword(s):  
Vertical Distribution ◽  
Gadus Morhua ◽  
Melanogrammus Aeglefinus ◽  
Multinomial Model ◽  
Vertical Separation ◽  
Commercially Important ◽  
Merlangius Merlangus ◽  
The Vertical Distribution ◽  
Haddock Melanogrammus Aeglefinus ◽  
Important Fish

Abstract Krag, L. A., Holst, R., and Madsen, N. 2009. The vertical separation of fish in the aft end of a demersal trawl. – ICES Journal of Marine Science, 66: 772–777. Two multi-compartment separator frames were used to study the vertical separation of some commercially important fish species in the aft end of a trawl, with the aim of separating cod (Gadus morhua) from other species. A non-linear multinomial model with random effects was used to analyse the data and to compare the performance of the two frames. The vertical distribution of cod in the aft end of the trawl was close to uniform, whereas haddock (Melanogrammus aeglefinus), whiting (Merlangius merlangus), plaice (Pleuronectes platessa), and lemon sole (Microstomus kitt) showed more uneven distributions. The use of guiding bars in the separator frame significantly (p < 0.05) increased the catch of cod, plaice, and lemon sole in the upper compartment. The vertical separation of cod was density-dependent; high densities of fish resulted in a more uniform distribution of cod. The species separations found differ from those reported from the studies of species separation in the region of the trawl mouth.

Precision Micrometer Measurement of Mouth Gape of Larval Fish

1987 ◽  
Vol 44 (10) ◽  
pp. 1786-1791 ◽  
Author(s):  
Michael T. Arts ◽  
D. O. Evans
Keyword(s):  
Body Size ◽  
Yellow Perch ◽  
Larval Fish ◽  
Perca Flavescens ◽  
Data Capture ◽  
Coregonus Clupeaformis ◽  
Manual Method ◽  
Direct Data ◽  
Coregonus Artedii ◽  
Lake Herring

A precision micrometer device is described which standardizes measurement of mouth gape of larval fish and provides a greater degree of accuracy and speed than the conventional manual method. We compared gape measurements of larval lake whitefish (Coregonus clupeaformis) and lake herring (Coregonus artedii) using the gape micrometer versus the manual method. The micrometer measurements revealed a greater increase in gape with body length and resulted in a greater proportion of the variance in gape being explained, indicating that the gape micrometer is more sensitive and accurate than the manual method. Coefficient of variation of gape measurements on 238 larval yellow perch (Perca flavescens) decreased with body size from 0.5–4.0% at 0.8–1.2 cm standard length to 0.2–0.5% at 3.0 cm. The device has the added advantage that it could be adapted to connect to a microcomputer for direct data capture.

Diel Activity and Vertical Distribution of Yellow Perch (Perca flavescens) Under the Ice

1966 ◽  
Vol 23 (4) ◽  
pp. 499-509 ◽  
Author(s):  
Gary L. Hergenrader ◽  
Arthur D. Hasler
Keyword(s):  
Vertical Distribution ◽  
Activity Pattern ◽  
Yellow Perch ◽  
Depth Distribution ◽  
Perca Flavescens ◽  
Diel Activity ◽  
Limited Extent ◽  
Diel Pattern ◽  
Lake Mendota ◽  
Individual Fish

Use of echo sounders showed that, under the ice in Lake Mendota, yellow perch (Perca flavescens Mitchill) have a bimodal diel pattern of activity. The first peak of activity, during midmorning, was much higher than the second, in midafternoon. Schools of fish in mid water made up the bulk of the fish traces per hour although individual fish were also commonly recorded. At night, when activity was much reduced, principally single fish were observed. The fish swam much more slowly at night than during the day.The activity pattern generally agreed with those reported by investigators for other lakes in that the perch were active during the day and relatively inactive at night.No well-defined change in depth distribution was noted. There was a tendency for the fish to move away from the bottom to a limited extent at night but no marked movement was recorded. The majority of fish were most often recorded at a depth of 30–60 ft (9–18 m), the main concentrations being in areas of the lake more than 50 ft (15 m) deep.

scholarly journals Vertical Distribution of Juvenile Salmon in a Large Turbid River

2019 ◽  
Vol 10 (2) ◽  
pp. 575-581
Author(s):  
Stephanie Jump ◽  
Michael B. Courtney ◽  
Andrew C. Seitz
Keyword(s):  
Vertical Distribution ◽  
Water Column ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Fish Distribution ◽  
Oncorhynchus Keta ◽  
Juvenile Salmon ◽  
Catch Per Unit Effort ◽  
Juvenile Pacific Salmon ◽  
The Vertical Distribution

Abstract We know very little about the vertical distribution of downstream-migrating juvenile Pacific salmon Oncorhynchus spp. in large rivers. It is important for project engineers and fisheries managers to understand the potential interactions of fishes with in-river hydrokinetic devices, which harness a river's energy by spinning a turbine to produce electrical current without damming or impounding water. Currently, several rural Alaskan communities are considering development projects for hydrokinetic devices, including projects in the Tanana River, near Nenana, Alaska. Therefore, the goal of this study was to determine the vertical distribution of juvenile Chinook Salmon Oncorhynchus tshawytscha, Coho Salmon Oncorhynchus kisutch, and Chum Salmon Oncorhynchus keta, in the Tanana River, at a site (bottom depth ∼ 8, channel width ∼ 150 m) where communities may deploy future hydrokinetic turbines. Using a suspended wingless fyke net system during diurnal periods (0800–1800 hours), we found juveniles of all three species at all depths of the water column and no significant differences in catch-per-unit-effort among four depth categories (surface, midwater, deep water, bottom water). The occurrence of juvenile salmon throughout the water column indicates that they may interact with hydrokinetic devices, regardless of their depth. Future research to more comprehensively characterize fish distribution patterns and describe the outcomes of fish–turbine interactions may inform practices aimed at reducing potentially deleterious impacts of hydrokinetic devices on juvenile Pacific salmon.

Effects of Dressing and Cooking on DDT Concentrations in Certain Fish from Lake Michigan

1972 ◽  
Vol 29 (5) ◽  
pp. 525-529 ◽  
Author(s):  
Robert E. Reinert ◽  
Donald Stewart ◽  
Harry L. Seagran
Keyword(s):  
Yellow Perch ◽  
Oil Content ◽  
Lake Michigan ◽  
Lake Trout ◽  
Coho Salmon ◽  
Corn Oil ◽  
Perca Flavescens ◽  
Salvelinus Namaycush ◽  
The Body ◽  
Coregonus Hoyi

Concentrations of DDT residues were highest in parts of the body with the highest oil content in four species of fish from Lake Michigan: yellow perch (Perca flavescens), bloater (Coregonus hoyi), lake trout (Salvelinus namaycush), and coho salmon (Oncorhynchus kisutch). Dressing reduced the DDT residues and oil content by more than 90% in yellow perch but had little effect in the other three species. The concentration of DDT residues in bloaters was changed little by smoking but was reduced 64–72% by other methods of cooking: from 8.0 ppm (raw) to 2.2 ppm after frying in corn oil; from 10.7 to 3.9 ppm after frying in lard; and from 9.1 to 3.2 ppm after broiling. The concentration of DDT residues in fillets of yellow perch changed only from 0.3 ppm (raw) to 0.4 or 0.5 ppm after baking, frying, or broiling.

Preliminary Observations on the Vertical Distribution of Pacific Salmon (Genus Oncorhynchus) in the Gulf of Alaska

1964 ◽  
Vol 21 (5) ◽  
pp. 891-903 ◽  
Author(s):  
J. I. Manzer
Keyword(s):  
Vertical Distribution ◽  
Sockeye Salmon ◽  
Chum Salmon ◽  
Coho Salmon ◽  
Pacific Salmon ◽  
Gulf Of Alaska ◽  
Downward Movement ◽  
Seasonal Differences ◽  
Vertical Movements ◽  
The Vertical Distribution

The vertical distribution of Pacific salmon in the high-seas areas of the Gulf of Alaska was investigated from mid May through July in 1959 and 1960 by fishing with gillnets (constructed from 41/2–inch nylon web and measuring 40 ft in depth and initially 400 fathoms in length) at five depth intervals from the surface with the deepest between 160 and 200 ft.Sockeye salmon exhibited diurnal and seasonal differences in their vertical distribution while chum salmon showed diurnal differences. The downward movement of sockeye salmon appeared limited by the thermocline, especially during late June and July. This relationship was observed for chum salmon during hours of darkness only in late June and July. Other factors must also influence seasonal and diurnal vertical movements of sockeye and chum salmon. Within the conditions of the experiment, no consistent differences in the vertical migrations between fish of different age were apparent. Catches showed pink and coho salmon were nearer the surface than either sockeye or chum salmon.

Vertical Distribution of Sediment and Organic Debris in Coho Salmon (Oncorhynchus kisutch) Redds in Three Small Oregon Streams

1988 ◽  
Vol 45 (4) ◽  
pp. 742-747 ◽  
Author(s):  
Neil H. Ringler ◽  
James D. Hall
Keyword(s):  
Vertical Distribution ◽  
Coho Salmon ◽  
Particle Diameter ◽  
Oncorhynchus Kisutch ◽  
Organic Content ◽  
Sediment Particle ◽  
Core Samples ◽  
Organic Debris ◽  
Coastal Streams ◽  
Sediment Layers

Vertical distribution of sediment (particle diameter <3.33 mm) and organic debris was studied in coho salmon (Oncorhynchus kisutch) redds in three Oregon coastal streams subjected to different degrees of logging. Gravel composition in frozen cores varied significantly among redds in both logged streams. Sediment content in redds appeared to decrease with depth in the logged streams, but differences in gravel composition among streams obscured differences among depths. Sediment layers of variable thickness were visible in several core samples. In one logged stream, redds contained an average of 25% less sediment than redds used 1 yr earlier. Organic content of the gravel represented <2.8% of the core samples by weight and was directly related to the quantity of sediment in the streambed. The pattern of vertical distribution of organic debris in the clearcut stream (most abundant near the surface) differed significantly from that in the other two streams. Patterns of distribution and variability in gravel composition were consistent with post-logging changes in gravel permeability and survival to emergence of coho salmon.

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