Dynamics and Species Interactions in the Commercial Fishery of the Red lakes, Minnesota

1992 ◽  
Vol 49 (2) ◽  
pp. 293-302 ◽  
Author(s):  
Donald L. Pereira ◽  
Yosef Cohen ◽  
George R. Spangler
Keyword(s):  
Species Interactions ◽  
Yellow Perch ◽  
Animal Feed ◽  
Age Distribution ◽  
Power Spectra ◽  
Commercial Fishery ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
Aplodinotus Grunniens ◽  
Freshwater Drum

The Red Lakes, Minnesota, have supported a commercial fishery for walleye (Stizostedion vitreum vitreum) and yellow perch (Perca flavescens) since 1917. Since 1972, harvests indicate increased variance in recruitment of percids and an increase in biomass of freshwater drum (Aplodinotus grunniens). We subjected commercial catch-per-unit-effort (CPUE) records of walleye, yellow perch, and animal feed (composed primarily of drum) to spectral analysis. Estimated power spectra displayed peaks at 8.5, 10, and 17 yr for walleye, yellow perch, and animal feed, respectively. Walleye and yellow perch CPUE time series were significantly coherent at periods ranging from 5to 10 yr, confirming the predator–prey relationship and common recruitment patterns of these two species. Interpretation of coherency between drum and the two percid species required knowledge of the age distribution of freshwater drum. The apparent exponential increase in drum biomass as indicated by commercial CPUE is primarily due to strong year classes in 1955, 1970, and 1983. While drum recruitment and growth are consistent with the periodicity in the autospectrum, we find little evidence from coherencies that drum recruitment is related to the dynamics of wlleye or perch populations.

Assessing the Interdependence of Assemblages from Rainy Lake Fisheries Data

1993 ◽  
Vol 50 (2) ◽  
pp. 402-409 ◽  
Author(s):  
Yosef Cohen ◽  
Paul Radomski ◽  
Ron Moen
Keyword(s):  
Species Diversity ◽  
Species Interactions ◽  
Yellow Perch ◽  
Function Analysis ◽  
Fish Communities ◽  
Role Reversal ◽  
Population Fluctuations ◽  
Catch Per Unit Effort ◽  
Large Lakes ◽  
The North

We applied ad hoc methods to quantify differences among fish communities in four different locations in Rainy Lake using data from index netting from long-term studies. Our analysis addressed problems of inconsistencies in data collection. We established the amount of differences and similarities among the communities by analyzing species diversity over time, utilizing matrices of partial correlations and discriminant function analysis. We also identified role reversal, i.e. synchronization in fluctuations of relative catch-per-unit-effort (CUE) between pairs of species in these communities. In the less disturbed communities, walleye (Stizostedion vitreum) contributed most to the synchronization in the fluctuations of the yearly relative CUE among six common species. In the more disturbed locations, this contribution was primarily due to yellow perch (Perca flavescens) and sauger (Stizostedion canadense). The disturbed community in one location (the North Arm) exhibited marked decrease in species diversity. Recent restrictions on the fisheries in the North Arm resulted in an increase in species diversity. Fish communities, particularly in large lakes, may differ in the detail of species interactions and population fluctuations among locations within the lake. These differences must be taken into account in analysis and management of fisheries.

Gape Limitation and Prey Selection in Larval Yellow Perch (Perca flavescens), Freshwater Drum (Aplodinotus grunniens), and Black Crappie (Pomoxis nigromaculatus)

1991 ◽  
Vol 48 (10) ◽  
pp. 1919-1925 ◽  
Author(s):  
Denise M. Schael ◽  
Lars G. Rudstam ◽  
John R. Post
Keyword(s):  
Yellow Perch ◽  
Prey Selection ◽  
Perca Flavescens ◽  
Fish Length ◽  
Prey Selectivity ◽  
Lake Mendota ◽  
Pomoxis Nigromaculatus ◽  
Aplodinotus Grunniens ◽  
Gape Size ◽  
Freshwater Drum

We compared prey selection of larval yellow perch (Perca flavescens), freshwater drum (Aplodinotus grunniens), and black crappie (Pomoxis nigromaculatus) in Lake Mendota, Wisconsin. All three species had a diet dominated by copepods and selected progressively larger prey as fish length increased. For a given fish length, freshwater drum selected larger prey and black crappie selected smaller prey than yellow perch. These differences in prey selectivity were partly explainable from differences in gape to length relationships. Freshwater drum did have the largest gape for a given length of the three species, but gape size for black crappie and yellow perch were similar. Gape size predicted 67% of the variability in mean prey size ingested by yellow perch but only 15% for freshwater drum and 8% for black crappie. Although gape size did predict the upper limit of ingestible prey sizes and explained some of the differences in prey selectivity among the three species, both the degree to which the different fishes can ingest prey close to their gape limit and the degree to which gape predicted mean size of ingested prey varied among the three fish species.

External morphology and internal anatomical characters of juveniles of the freshwater drum Aplodinotus grunniens

2018 ◽  
Vol 25 (6) ◽  
pp. 1161
Author(s):  
Haibo WEN ◽  
Xueyan MA ◽  
Pao XU ◽  
Bingqing ZHENG ◽  
Xinhua YUAN ◽  
...  
Keyword(s):  
External Morphology ◽  
Aplodinotus Grunniens ◽  
Anatomical Characters ◽  
Freshwater Drum

scholarly journals On estimating the age composition of the commercial catch of Northeast Arctic cod from a sample of clusters

2003 ◽  
Vol 60 (2) ◽  
pp. 297-303 ◽  
Author(s):  
Aanes Sondre ◽  
Michael Pennington
Keyword(s):  
Age Structure ◽  
Age Distribution ◽  
Significant Loss ◽  
Effective Sample Size ◽  
Commercial Fishing ◽  
Total Catch ◽  
Intracluster Correlation ◽  
Age Composition ◽  
Commercial Catch ◽  
Arctic Cod

Abstract Assessment of Northeast Arctic cod is based on estimates of the commercial catch in numbers at age. The age structure of the catch is estimated by sampling fish from commercial fishing trips. Although it is commonly assumed that a sample of individuals is a random sample from the population, fish sampled from the same trip (i.e. from a “cluster” of fish) tend to be more similar in age than those in the total catch. For Northeast Arctic cod, the intracluster correlation for age is positive, and therefore the effective sample size is much smaller than the number of fish aged. Given the number of fish aged, the precision of the estimated age distribution is rather low, and the number of fish aged from each trip could be reduced from approximately 85 to 20 without a significant loss in precision.

Walleye (Stizostedion vitreum vitreum) and Yellow Perch (Perca flavescens) Populations and Fisheries of the Red Lakes, Minnesota, 1930–75

1977 ◽  
Vol 34 (10) ◽  
pp. 1774-1783 ◽  
Author(s):  
Lloyd L. Smith Jr.
Keyword(s):  
Growth Rate ◽  
Yellow Perch ◽  
Climatic Factors ◽  
Perca Flavescens ◽  
Growing Season ◽  
Commercial Fishery ◽  
Class Strength ◽  
Parent Stock ◽  
Catch Statistics

In an investigation of the commercial fishery of Red Lakes, Minnesota, for the 46-yr period 1930–75, catch statistics were analyzed, and the dynamics of the perch and walleye populations were examined. Mean annual yields of walleye for two statistical periods, 1930–53 and 1954–75, were 309,900 and 245,100 kg, respectively for walleyes, and 96,400 and 109,500 kg for perch. Annual abundance (CPE based on average catches per day per 5-net units of gill nets) varied from 3.8 to 64.6 kg for walleye, and from 2.5 to 34.4 kg for perch. Causes of fluctuations in harvestable stock were directly related to strength of year-classes and to growth rate during the season of capture. Year-class strength was not related to the abundance of parent stock or of potential predators. The respective strengths of year-classes of perch and walleye in the same year were positively correlated (r = 0.859, P < 0.01), and are directly related to climatic factors. Growth rate of walleye in different calendar years varied from +30.7 to −42.2% of mean growth, and that of perch from +13.4 to −8.6% (1941–56). Growing season began in mid-June and was almost over by September 1. Walleye yield could be enhanced by starting harvest July 1 instead of early June. Perch yield could be improved by harvesting small perch. Key words: Percidae, Perca, population dynamics, Stizostedion, long-term yield

Wind-Aided Recruitment of Canadian Arctic Cisco (Coregonus autumnalis) into Alaskan Waters

1988 ◽  
Vol 45 (5) ◽  
pp. 906-910 ◽  
Author(s):  
Robert G. Fechhelm ◽  
David B. Fissel
Keyword(s):  
Time Series ◽  
Canadian Arctic ◽  
Wind Data ◽  
Commercial Fishery ◽  
Catch Per Unit Effort ◽  
Longshore Currents ◽  
Unit Effort ◽  
Colville River ◽  
Young Of The Year ◽  
Mackenzie River

Summer wind data collected at Barter Island, Alaska, were compared with commercial fishery catches of arctic cisco (Coregonus autumnalis) at the Colville River, Alaska, for the period 1967–85. There was a significant (p = 0.036) association between yearly catch-per-unit-effort and the percent of easterly winds after adjusting for a 5-yr differential in the two time series. Results suggest that young-of-the-year fish which spawn in Canada's Mackenzie River are aided in their westward dispersal into Alaskan waters via wind-driven longshore currents. The greater the prevalence of easterly winds (westerly currents), the greater the recruitment. Increased recruitment manifests itself as an increase in Alaskan commercial fishery catch some 5-yr later when fish have grown to a size that renders them susceptible to commercial nets.

scholarly journals Reproductive biology of the freshwater drum Aplodinotus grunniens in Tabasco, Mexico

2017 ◽  
Vol 4 (11) ◽  
pp. 317
Author(s):  
Raúl Enrique Hernández-Gómez ◽  
Wilfrido Miguel Contreras-Sánchez ◽  
Martha Alicia Perera-García
Keyword(s):  
Reproductive Biology ◽  
Aplodinotus Grunniens ◽  
Freshwater Drum

The occurrence of Diplostomum spathaceum metacercariae in the freshwater drum, Aplodinotus grunniens

1989 ◽  
Vol 67 (11) ◽  
pp. 2853-2856 ◽  
Author(s):  
Gregory H. Leno ◽  
Harry L. Holloway Jr.
Keyword(s):  
Worm Burden ◽  
Infection Intensity ◽  
Female Fish ◽  
Body Width ◽  
Aplodinotus Grunniens ◽  
The North ◽  
Diplostomum Spathaceum ◽  
Significant Difference ◽  
Left And Right ◽  
Freshwater Drum

Strigeoid metacercariae from the lenses of freshwater drum, Aplodinotus grunniens, were morphometrically analyzed and compared with those of the North American subspecies of Diplostomum spathaceum: Diplostomum spathaceum indistinctum and Diplostomum spathaceum huronense. The metacercariae resembled D. s. indistinctum in mean body length, mean body width, oral sucker size, and holdfast size. Prevalence of infection in drum was 99% and intensity ranged from 0 to 260 worms per fish (mean ± SD = 35 ± 32). A significant difference (P < 0.05) in mean intensity between male and female fish was observed, with females harboring a greater worm burden (i.e., 43 in females versus 24 in males). Differences in infection intensity between left and right lenses from all fish were not significant (P > 0.05); however, the degree of asymmetry between left and right lenses of individual fish was highly significant (P < 0.005) according to heterogeneity χ2 analysis. In this case, neither left nor right lenses were consistently favored.

Eels at the Edge: Science, Status, and Conservation Concerns

2009 ◽  
Keyword(s):  
New Zealand ◽  
Management System ◽  
Stock Assessment ◽  
Catch Per Unit Effort ◽  
Commercial Catch ◽  
The North ◽  
Anguilla Australis ◽  
Unit Effort ◽  
Access Rights ◽  
Quota Management

<em>Abstract.</em>—The New Zealand eel fishery comprises two species, the shortfin eel <em>Anguilla australis </em>and the New Zealand longfin eel <em>A. dieffenbachii</em>. A third species, the speckled longfin eel <em>A. reinhardtii</em>, is present in small numbers in some areas. Major fisheries in New Zealand are managed under the Quota Management System. Individual transferable quotas are set as a proportion of an annual total allowable commercial catch. The Quota Management System was introduced into the South Island eel fishery on 1 October 2000 and the North Island fishery on 1 October 2004. Freshwater eels have particular significance for customary Maori. Management policies allow for customary take and the granting of commercial access rights on introduction into the Quota Management System. Eel catches have remained relatively constant since the early 1970s. The average annual catch from 1989–1990 to 2001–2002 (fishing year) was 1,313 mt. Catch per unit effort remained constant from 1983 to 1989 and reduced from 1990 to 1999. Statistically significant declines in catch per unit effort for New Zealand longfin eel were found in some areas over the latter period. For management, an annual stock-assessment process provides an update on stock status.

Wabash River Freshwater Drum Aplodinotus grunniens Diet: Effects of Body Size, Sex, and River Gradient

2013 ◽  
Vol 5 (1) ◽  
pp. 133-140 ◽  
Author(s):  
Stephen J. Jacquemin ◽  
Mark Pyron ◽  
Michael Allen ◽  
Lucas Etchison
Keyword(s):  
Body Size ◽  
Generalized Linear Model ◽  
Longitudinal Gradient ◽  
Diet Diversity ◽  
Diet Specialization ◽  
Wabash River ◽  
Aplodinotus Grunniens ◽  
Caddisfly Larvae ◽  
Freshwater Drum ◽  
Prey Items

Abstract The objectives of this study were to describe the diets of freshwater drum Aplodinotus grunniens in the Wabash River in the Midwestern United States. We used a multivariate ordination approach (nonmetric multidimensional scaling) to describe drum diets combined with a generalized linear model to test for covariation of diet with body size, sex, and longitudinal river gradient. Hydropsychidae (trichoptera, caddisfly larvae), pleuroceridae (gastropoda), and heptageniidae (ephemeroptera, mayfly larvae) were the most consumed prey items (∼75% of overall diets). Among all freshwater drum, hydropsychidae, pleuroceridae, and heptageniidae were present in 69%, 23%, and 38% of stomachs, respectively. Freshwater drum diets were similar along an upstream–downstream river gradient spanning 350 river km, but varied with body size and sex. Small- and medium-sized fish tended to consume more diptera and annelids compared with the largest individuals, which fed on mollusks and crayfish. With control for body size, the diets of male individuals were composed of more diptera (chironomidae) and annelid prey items compared with female individuals, whose diets included more molluscs and crayfish. Overall, we interpret the lack of diet diversity in freshwater drum with Wabash River longitudinal gradient as evidence of diet specialization. Alternatively, we propose that a potential dietary–river-gradient signal may be diluted as a function of increased freshwater drum longitudinal movements.

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