Seasonal prevalence, intensity of infestation, and distribution of glochidia of Anodonta grandis simpsoniana Lea on yellow perch, Perca flavescens

1991 ◽  
Vol 69 (4) ◽  
pp. 964-972 ◽  
Author(s):  
Wolfgang A. Jansen
Keyword(s):  
Body Weight ◽  
Fish Species ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Relative Importance ◽  
Seasonal Prevalence ◽  
Attachment Sites ◽  
Anodonta Grandis ◽  
External Body

Five fish species were sampled at regular intervals in Narrow Lake, central Alberta, and examined for the prevalence and intensity of infestation by glochidia larvae of Anodonta grandis simpsoniana. Yellow perch (Perca flavescens) collected between January and May were infested with glochidia, whereas perch captured between June and October were free of larvae. The prevalence of infestation increased gradually from 86 to 95% between January and May, and the intensity of infestation increased from 5.7 to 49.4 glochidia per fish over the same period. Glochidia were found on most external body surfaces, including the gills. Glochidia attached preferentially to some anatomical areas, especially pectoral and pelvic fins. Furthermore, the relative importance of certain attachment sites differed significantly among sampling dates. Neither sex, size (length or weight), or age of perch significantly affected the intensity of infestation per fish. However, small (4.4–6.0 cm), 1- and 2-year-old fish carried more than 12 times the number of glochidia per gram of body weight than large (12.1–15.7 cm), 4- to 7-year-old fish. Both perch behavior and distribution and clam reproduction and distribution provide possible explanations for the observed patterns in the prevalence and intensity of infestation and in the distribution of the glochidia on the host.

Growth and Feeding Responses of Male versus Female Yellow Perch (Perca flavescens) Treated with Estradiol-17β

1988 ◽  
Vol 45 (11) ◽  
pp. 1942-1948 ◽  
Author(s):  
Jeffrey A. Malison ◽  
Terrence B. Kayes ◽  
Bernard C. Wentworth ◽  
Clyde H. Amundson
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Food Consumption ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Growth Patterns ◽  
Carcass Composition ◽  
Competition For Food ◽  
Growth Differences ◽  
Estradiol 17Β

In yellow perch (Perca flavescens) (initially 13–16 g total weight) fed to satiation (3.0–3.5% of body weight per day), estradiol-17β (E2) at 15 μg/g diet stimulated weight gain and food consumption of both sexes but did not influence food conversion efficiency (FCE), as measured by weight gain of fish per weight of food consumed. Females fed to satiation gained more weight, consumed more food, and had higher FCE than males. In perch fed a restricted ration (1.2% of body weight per day), the differences between the sexes in weight gain were reduced and due entirely to differences in FCE, and weight gain was not improved by E2. Spatial segregation or integration of the sexes had no influence on sex-related growth patterns in perch fed either the satiation or restricted ration. Carcass composition of perch treated for 84 d with E2 at 2, 20, or 50 μg/g diet did not differ from that of controls. These data indicate that (1) estrogens promote growth in yellow perch by stimulating food consumption, (2) female perch outgrow males because of both greater food consumption and higher FCE, and (3) growth differences between the sexes are not a consequence of intersexual competition for food.

A field study examining the relative importance of food and water as sources of cadmium for juvenile yellow perch (Perca flavescens)

2006 ◽  
Vol 63 (3) ◽  
pp. 549-557 ◽  
Author(s):  
Lisa D Kraemer ◽  
Peter GC Campbell ◽  
Landis Hare ◽  
Jean-Christian Auclair
Keyword(s):  
Yellow Perch ◽  
Perca Flavescens ◽  
Contaminated Water ◽  
Relative Importance ◽  
Heat Stable ◽  
Contaminated Food ◽  
To Come ◽  
Cd Exposure ◽  
Subcellular Level ◽  
All Treatment

To determine the relative importance of water and food as cadmium (Cd) sources for juvenile yellow perch (Perca flavescens, age 1+), fish were caged for up to 30 days in either a reference (Opasatica) or a Cd-contaminated (Dufault) lake and offered prey (zooplankton) from one of these lakes. We established four Cd-exposure regimes: a control, Cd-contaminated water only, Cd-contaminated food only, Cd-contaminated food and water. The 64 µm mesh cages used allowed the free exchange of water with the surrounding lake while retaining the added zooplankton prey for the perch. Cd in the gills and kidney of caged perch was taken up largely from lake water, whereas liver and gut Cd appeared to come from both dietary and aqueous sources. At the subcellular level (liver), the majority of the background Cd in control perch was associated with metal-sensitive fractions (organelles and heat-denatured proteins), whereas in perch exposed to waterborne or diet-borne Cd, the majority of the Cd was found in a metal-detoxified fraction (heat-stable proteins, metallothionein). For perch from all treatment levels, the higher the concentration of hepatic Cd, the greater the proportion of the Cd burden in this organ that was associated with the fraction containing metallothionein-like proteins.

Estimates of the number of glochidia produced by clams (Anodonta grandis simpsoniana Lea), attaching to yellow perch (Perca flavescens), and surviving to various ages in Narrow Lake, Alberta

1991 ◽  
Vol 69 (4) ◽  
pp. 973-977 ◽  
Author(s):  
Wolfgang A. Jansen ◽  
J. Mark Hanson
Keyword(s):  
Life Cycle ◽  
Water Temperature ◽  
Population Size ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Breeding Cycle ◽  
High Survival ◽  
Anodonta Grandis ◽  
Parasitic Phase

Between May 1986 and March 1989, the density, breeding cycle, and glochidia production of the unionid clam Anodonta grandis simpsoniana, and the population size and intensity of glochidia infestation of yellow perch, Perca flavescens, were evaluated in Narrow Lake, Alberta. The total number of glochidia produced was compared with the number of glochidia infesting yellow perch, and clam recruitment to age 2 and adulthood was estimated. Clams carried eggs and glochidia between July and, dependent on the prevailing water temperature, May or June of the following year. A total of 2.9 × 106 clams 2 years and older, of which approximately 50% were mature, produced 38.1 × 1012 glochidia in 1987. Of these, 2.6 × 106 (0.007%) glochidia attached to perch, predominantly (>92%) to 1- and 2-year-old fish. Once attached to perch, glochidia had a relatively high survival: 27% to 2 years of age and 9–18% to maturity. These results suggest that the parasitic phase in the life cycle of unionids is most critical.

A Bioenergetics-Based Model for Pollutant Accumulation by Fish. Simulation of PCB and Methylmercury Residue Levels in Ottawa River Yellow Perch (Perca flavescens)

1976 ◽  
Vol 33 (2) ◽  
pp. 248-267 ◽  
Author(s):  
R. J. Norstrom ◽  
A. E. McKinnon ◽  
A. S. W. deFreitas
Keyword(s):  
Body Weight ◽  
Metabolic Rate ◽  
Chronic Exposure ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Assimilation Efficiency ◽  
Ottawa River ◽  
Residue Levels ◽  
Fish Energetics ◽  
Caloric Requirements

A pollutant accumulation model is developed which successfully predicts concentrations of PCBs and methylmercury in tissues of yellow perch (Perca flavescens) from the Ottawa River, Canada. The model is based on pollutant biokinetics coupled to fish energetics. The expression for metabolic rate includes a growth dependent term for estimating the contribution to metabolism of seasonal and annual growth in each age-class. Uptake of pollutant from food is based on caloric requirements for respiration and growth coupled to concentration of pollutant in food and its assimilation efficiency from the diet. Uptake of pollutant from water is based on flow of water past the gills for respiration coupled with concentration of pollutant in water and the efficiency of its assimilation by gills. Pollutant clearance is related to body weight raised to the power of −.58, but is independent of metabolic rate. Under steady state conditions of chronic exposure, the predicted ratio of uptake to clearance is roughly constant at all weights, and the slope of a curve of log pollutant concentration in tissues vs. log body weight can be used to establish the exponent of body weight for clearance.

Low pH and the Absence of Fish Species in Naturally Acidic Wisconsin Lakes: Inferences for Cultural Acidification

1983 ◽  
Vol 40 (1) ◽  
pp. 3-9 ◽  
Author(s):  
Frank J. Rahel ◽  
John J. Magnuson
Keyword(s):  
Fish Species ◽  
Species Interactions ◽  
Yellow Perch ◽  
Fish Assemblages ◽  
Perca Flavescens ◽  
Acid Precipitation ◽  
Low Ph ◽  
Species Occurrence ◽  
Oligotrophic Lakes ◽  
Laboratory Exposure

In a group of 138 northern Wisconsin lakes (pH 4.0–9.2), we observed differences in the lowest pH at which 31 fish species occurred. The central mudminnow (Umbra limi), yellow perch (Perca flavescens), and various centrarchids occurred below pH 5.0, whereas many cyprinids and darters were not found below pH 6.2. Rankings of species occurrence with minimum pH in these naturally acidic lakes were similar to data from Canadian lakes affected by acid precipitation, and rankings based on survival during laboratory exposure to low pH. Wisconsin oligotrophic lakes that are susceptible to acid precipitation typically lack many fish species sensitive to low pH, even when lake pH is near 7.0. Species interactions and biogeographic factors, not recent cultural acidification, are probably responsible for species absences in these lakes. Knowledge of the pH ranges naturally tolerated by fishes and the structure of fish assemblages in lakes sensitive to acid precipitation will aid in detecting changes caused by cultural acidification.Key words: acid lake, acidification, pH, fish communities, Wisconsin

Daily Ration of Yellow Perch (Perca flavescens) from Lake Memphremagog, Quebec–Vermont, with a Comparison of Methods for In Situ Determinations

1978 ◽  
Vol 35 (12) ◽  
pp. 1597-1603 ◽  
Author(s):  
Brian S. Nakashima ◽  
William C. Leggett
Keyword(s):  
Body Weight ◽  
Body Size ◽  
Yellow Perch ◽  
Diet Composition ◽  
Seasonal Pattern ◽  
Feeding Activity ◽  
Perca Flavescens ◽  
Complex Method ◽  
Daily Ration

In situ estimates of daily ration for yellow perch (Perca flavescens) range from a high of 5.5–6.7% body weight in July to a low of 2.2–2.4% body weight in October. The seasonal pattern corresponds well to known patterns of growth. Comparison of three methods for in situ determination of daily ration levels indicated the method outlined here and the more complex method of Thorpe yield similar results. The method of Keast and Welsh and derivatives of this method which correct for digestion between sampling periods give unreliable values that are 50% below the other two and, in general, are below maintenance ration levels. Diet composition and feeding activity varied seasonally and with body size. Key words: body size relationships, diet composition, seasonality

scholarly journals You are what you eat: relative importance of diet, gut microbiota and nestmates for honey bee, Apis mellifera, worker health

Apidologie ◽  
2021 ◽  
Author(s):  
Gina Retschnig ◽  
Johannes Rich ◽  
Karl Crailsheim ◽  
Judith Pfister ◽  
Vincent Perreten ◽  
...  
Keyword(s):  
Body Weight ◽  
Apis Mellifera ◽  
Gut Microbiota ◽  
Honey Bee ◽  
Exposure Period ◽  
Short Exposure ◽  
Relative Importance ◽  
Worker Health ◽  
Negative Effect ◽  
Positive Effect

AbstractIn eusocial honey bees, Apis mellifera, diet, gut microbiota and nestmates can all contribute to the health of freshly emerged individual workers, but their relative importance for longevity and body weight is currently unknown. Here, we show that diet is most relevant, followed by gut microbiota and the presence of nestmates. Freshly emerged workers were randomly assigned to eight treatments (with or without honey/pollen, protein-substitute lactalbumin, antibiotic tetracycline and nestmates for 24 h) and maintained under standardised laboratory conditions. Longevity and food consumption were measured daily and fresh body weight was assessed at day 7. The data show a significantly better survival and a higher body weight in workers supplied with honey/pollen. Survival was higher in the lactalbumin treatments compared to the ones restricted to sucrose only, but lower compared to those with honey/pollen, highlighting the importance of micronutrients. In contrast, antibiotic treatment had a significant negative effect on longevity and body weight, which may be explained by inactivated gut microbiota and/or toxicity of the antibiotics. There was no positive effect of nestmates, probably due to the short exposure period. In contrast, nestmates showed a negative effect on survival in antibiotic-treated workers, possibly by transmitting pathogens and antibiotic-induced gut dysbiosis. In conclusion, a macro- and micronutrient-rich diet appears to be the key to individual honey bee worker health. Providing an optimal diet and possibly gut microbiota appears to be a promising way to promote managed A. mellifera health.

Quantitative comparisons of the morphology and ultrastructure of erythrocyte nuclei from seven freshwater fish species

1995 ◽  
Vol 73 (10) ◽  
pp. 1951-1959 ◽  
Author(s):  
Charles H. Jagoe ◽  
Dave A. Welter
Keyword(s):  
Fish Species ◽  
Yellow Perch ◽  
Micropterus Salmoides ◽  
Lepomis Macrochirus ◽  
Nuclear Size ◽  
Image Analysis System ◽  
Cell Nuclei ◽  
Homogeneous Population ◽  
Differentiated Cells ◽  
Rainbow Trout Oncorhynchus Mykiss

Chromosome number and genomic DNA content vary widely among fish species, and ploidy can vary within species. This suggests that the size, shape, and morphological features of cell nuclei may also vary. Nucleated erythrocytes of fish are an easily sampled homogeneous population of differentiated cells ideal for inter- and intra-species comparisons. We collected blood samples from largemouth bass (Micropterus salmoides), bluegill (Lepomis macrochirus), chain pickerel (Esox niger), yellow perch (Perca flavescens), mosquitofish (Gambusia holbrooki), redeye bass (Micropterus coosae), and rainbow trout (Oncorhynchus mykiss) and removed cytoplasm and nuclear membranes from blood cells. Individual nuclei were examined and measured using scanning electron microscopy and a computerized image analysis system, and inter- and intra-species differences evaluated by nested analysis of variance. Nuclear size and shape varied significantly among species. Isolated nuclei had conspicuous apertures or holes, and the number and size of these holes also varied significantly among species. Variations in nuclear size and structure within species were small compared with interspecies differences. Little is known of the ultrastructure of erythrocyte nuclei in lower vertebrates, but their structure differs considerably from that of other vertebrate non-erythroid cells, suggesting that the organization of their DNA and associated proteins may be different.

Survival to hatching of fishes in sulfate-saline waters, Devils Lake, North Dakota

1995 ◽  
Vol 52 (3) ◽  
pp. 464-469 ◽  
Author(s):  
Todd M. Koel ◽  
John J. Peterka
Keyword(s):  
North Dakota ◽  
Sodium Sulfate ◽  
Yellow Perch ◽  
Hatching Success ◽  
Perca Flavescens ◽  
White Sucker ◽  
Catostomus Commersoni ◽  
Devils Lake ◽  
Common Carp Cyprinus Carpio ◽  
Species Survival

Laboratory-based bioassays were conducted to determine concentrations of sodium-sulfate type salinities that limit the hatching success of several fish species. Survival to hatching (SH) was significantly lower (P < 0.05) in sodium-sulfate type waters from Devils Lake, North Dakota, of ≥ 2400 mg/L total dissolved solids (TDS) than in fresh water of 200 mg/L. In waters of 200, 1150, 2400, 4250, and 6350 mg/L TDS, walleye (Stizostedion vitreum) SH was 41, 38, 7, 1, and 0%; northern pike (Esox lucius) SH was 92, 68, 33, 2, and 0%; yellow perch (Perca flavescens) SH was 88, 70, 73, 0, and 0%; white sucker (Catostomus commersoni) SH was 87, 95, 66, 0, and 0%; common carp (Cyprinus carpio) SH was 71, 69, 49, 63, and 25%.

scholarly journals A description of mercury in fishes from the Madeira River Basin, Amazon, Brazil

2008 ◽  
Vol 38 (3) ◽  
pp. 431-438 ◽  
Author(s):  
Wanderley Rodrigues Bastos ◽  
Mauro de Freitas Rebelo ◽  
Márlon de Freitas Fonseca ◽  
Ronaldo de Almeida ◽  
Olaf Malm
Keyword(s):  
Body Weight ◽  
River Basin ◽  
Fish Species ◽  
Temporal Trends ◽  
Migratory Fish ◽  
Madeira River ◽  
Interspecies Variability ◽  
Total Hg ◽  
Madeira River Basin ◽  
Hg Accumulation

Over the last 20 years several projects carried on the Madeira River basin in the Amazon produced a great amount data on total Hg concentration in different fish species. In this paper we discuss temporal trends in Hg contamination and its relation to body weight in some of those fishes, showing that even within similar groups, such as carnivorous and non-migratory fish, the interspecies variability in Hg accumulation is considerable.

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