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Alice Hontela - One of the best experts on this subject based on the ideXlab platform.
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disruption of the hypothalamo pituitary interrenal axis in 1 yellow perch Perca flavescens chronically exposed to metals in the environment
Canadian Journal of Fisheries and Aquatic Sciences, 2005Co-Authors: A Gravel, Gc P Campbell, Alice HontelaAbstract:Although it has been reported that adult yellow perch (Perca flavescens) chronically exposed to metals in the environment exhibit endocrine impairment characterized by blunted cortisol secretion, little is known about the vulnerability of early life stages. Young-of-the-year (YOY) and 1+ yellow perch were captured, subjected to a standardized stress test or adrenocorticotropic-hormone stimulation in lakes situated along a contamination gradient of Cd, Cu, and Zn in the mining region of Abitibi, Quebec. For the first time, whole-body cortisol concentrations were measured. The 1+ fish with elevated whole-body Cd, Cu, and Zn concentrations had an impaired capacity to respond to an acute stress challenge. Although YOY perch had similar whole-body Cd concentrations to 1+ perch, no effects on physiological status were detected in relation to body burdens of metals. Metal contamination did not affect whole-body thyroid-hormone concentrations, condition factor, or hepatosomatic index in 1+ or YOY perch. These res...
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a comparative assessment of the adrenotoxic effects of cadmium in two teleost species rainbow trout oncorhynchus mykiss and yellow perch Perca flavescens
Aquatic Toxicology, 2004Co-Authors: Alexandra Lacroix, Alice HontelaAbstract:Abstract Rainbow trout ( Oncorhynchus mykiss ) and yellow perch ( Perca flavescens) have a different sensitivity to cadmium (Cd) in vivo (trout O.mykiss =175.6>LC50/EC50 P.flavescens =37.7). Adrenocortical cells of trout were more sensitive than those of perch and Cd had a higher endocrine-disrupting potential and specificity in trout than in perch. However, in both species, Cd had the same effect on ACTH, dbcAMP and pregnenolone-stimulated cortisol secretion, with pregnenolone maintaining cortisol secretion until cell viability was impaired. These results confirm that for both species, Cd interferes in the signalling pathway of cortisol synthesis in a step prior to the pregnenolone formation. Data provided by the present study revealed important differences in vulnerability of adrenal steroidogenesis between rainbow trout and yellow perch.
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bioenergetic costs of heavy metal exposure in yellow perch Perca flavescens in situ estimates with a radiotracer 137cs technique
Canadian Journal of Fisheries and Aquatic Sciences, 2000Co-Authors: Graham D Sherwood, Julie C Brodeur, Joseph B Rasmussen, David J Rowan, Alice HontelaAbstract:While the flow of energy is understood to determine the growth of organisms and the productivity of ecosystems, little is known about the sublethal effect of pollutants on the energetic efficiency of wild populations. We used field estimates of fish growth coupled to in situ estimates of food consumption rates obtained from the mass balance of a globally dispersed, trophically transferred radiotracer (137Cs) to demonstrate the bioenergetic impairment of yellow perch (Perca flavescens) from lakes polluted by heavy metals (Cd, Cu, and Zn). Annual growth increment relative to the total energy budget (conversion efficiency) was about three times lower in cortisol-impaired yellow perch from metal-polluted lakes relative to yellow perch from reference lakes (4.2% compared with 10.8%), suggesting that fish exposed to pollutants experienced greater total energetic costs. In addition, metal-polluted lakes were dominated by adult yellow perch populations and simplified prey bases, suggesting that effects are occurr...
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responsiveness of the interrenal tissue of yellow perch Perca flavescens from contaminated sites to an acth challenge test in vivo
Canadian Journal of Fisheries and Aquatic Sciences, 1998Co-Authors: Caroline Girard, Julie C Brodeur, Alice HontelaAbstract:The effects of chronic toxic stress on the hypothalamo-pituitary-interrenal (HPI) axis were investigated in yellow perch (Perca flavescens) captured at a reference site (Lake Memphremagog) and two ...
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responsiveness of the interrenal tissue of yellow perch Perca flavescens from contaminated sites to an acth challenge test in vivo
Canadian Journal of Fisheries and Aquatic Sciences, 1998Co-Authors: Caroline Girard, Julie C Brodeur, Alice HontelaAbstract:The effects of chronic toxic stress on the hypothalamo-pituitary-interrenal (HPI) axis were investigated in yellow perch (Perca flavescens) captured at a reference site (Lake Memphremagog) and two sites contaminated with heavy metals and organic contaminants (Ile Perrot and Iles de la Paix, Lake St. Louis) in spring, summer, and fall. Cortisol secretion of the fish was stimulated in situ by an acute capture stress or by an i.p. injection of 4 IU/100 g body mass of porcine corticotropin (ACTH1-39). The response to both these challenges was lower in perch from the highly contaminated site than in perch from the reference site in the spring but not in summer. In fall, fish from the highly contaminated site had, as in spring, a lower response to ACTH than fish from the reference site. The reduced ability of perch to respond to capture stress or to ACTH indicates that the interrenal tissue in fish from contaminated sites is functionally impaired. Cortisol-impaired fish also had abnormal carbohydrate metabolism...
Joseph B Rasmussen - One of the best experts on this subject based on the ideXlab platform.
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shifts in the trophic ecology of brook trout resulting from interactions with yellow perch an intraguild predator prey interaction
Transactions of The American Fisheries Society, 2009Co-Authors: David R Browne, Joseph B RasmussenAbstract:Abstract In size-structured populations, predator-prey interactions may be preceded by a phase of resource competition earlier in ontogeny, with potential consequences for population dynamics and resource management. We hypothesized that brook trout Salvelinus fontinalis and yellow perch Perca flavescens would compete for shared resources and interact as predator and prey. We used stable isotopes and stomach content analysis to compare the trophic ecology of brook trout in lakes with and without yellow perch. Percent littoral resource use by brook trout differed between perch and nonperch systems, ranging from approximately 50% to 100% in nonperch lakes compared with 10-70% in perch lakes. Nonpiscivorous-sized brook trout (fork length [FL] < 25 cm) showed a significant ontogenetic diet shift toward greater pelagic resource use during growth from 15 to 25 cm in sympatry with yellow perch. Nonpiscivorous-sized brook trout in nonperch lakes consumed a mixture of zoobenthos, zooplankton, and littoral prey fis...
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indirect effects of metal contamination on energetics of yellow perch Perca flavescens resulting from food web simplification
Freshwater Biology, 2005Co-Authors: Alison C Iles, Joseph B RasmussenAbstract:SUMMARY 1. Benthic invertebrate community composition and yellow perch (Perca flavescens) diet, growth and activity levels from lakes along a metal-contamination gradient were used to assess the importance of a naturally diverse prey base for maintaining energy transfer to growing fish, and how this transfer is disrupted by metal contamination. 2. Zoobenthic communities had lower diversity in metal-contaminated lakes, with a notable absence of large bodied invertebrate taxa. 3. The average mass of non-zooplankton prey items was significantly greater for 2+ and 3+ perch from the reference lake, and increased significantly with age in all except the most contaminated lakes where prey choice was limited. 4. Benthivorous perch from all contaminated lakes exhibited slowed growth. Perch from one of the contaminated lakes exhibited faster growth during piscivory, indicating slowed growth only while benthivorous. 5. Estimates of fish activity, using the activity of the glycolytic enzyme Lactate dehydrogenase in perch white muscle tissue as a proxy, suggested that shifts in diet to larger prey (in reference and intermediately contaminated lakes) lowered activity costs, which may explain how diet shifts maintain growth efficiency as perch grow larger.
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influence of lake chemistry and fish age on cadmium copper and zinc concentrations in various organs of indigenous yellow perch Perca flavescens
Canadian Journal of Fisheries and Aquatic Sciences, 2004Co-Authors: Anik Giguere, Peter G C Campbell, Landis Hare, Gordon D Mcdonald, Joseph B RasmussenAbstract:Concentrations of Cd, Cu, and Zn were determined in various organs of juvenile yellow perch (Perca flavescens) collected from eight lakes located along a metal concentration gradient. Metal exposur...
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bioenergetic costs of heavy metal exposure in yellow perch Perca flavescens in situ estimates with a radiotracer 137cs technique
Canadian Journal of Fisheries and Aquatic Sciences, 2000Co-Authors: Graham D Sherwood, Julie C Brodeur, Joseph B Rasmussen, David J Rowan, Alice HontelaAbstract:While the flow of energy is understood to determine the growth of organisms and the productivity of ecosystems, little is known about the sublethal effect of pollutants on the energetic efficiency of wild populations. We used field estimates of fish growth coupled to in situ estimates of food consumption rates obtained from the mass balance of a globally dispersed, trophically transferred radiotracer (137Cs) to demonstrate the bioenergetic impairment of yellow perch (Perca flavescens) from lakes polluted by heavy metals (Cd, Cu, and Zn). Annual growth increment relative to the total energy budget (conversion efficiency) was about three times lower in cortisol-impaired yellow perch from metal-polluted lakes relative to yellow perch from reference lakes (4.2% compared with 10.8%), suggesting that fish exposed to pollutants experienced greater total energetic costs. In addition, metal-polluted lakes were dominated by adult yellow perch populations and simplified prey bases, suggesting that effects are occurr...
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impaired cortisol secretion in yellow perch Perca flavescens from lakes contaminated by heavy metals in vivo and in vitro assessment
Canadian Journal of Fisheries and Aquatic Sciences, 1997Co-Authors: Julie C Brodeur, Graham D Sherwood, Joseph B Rasmussen, Alice HontelaAbstract:The characteristic elevation of plasma cortisol levels in response to an acute stress of capture was impaired in both male and female yellow perch (Perca flavescens) from lakes contaminated by heav...
Robert Arlinghaus - One of the best experts on this subject based on the ideXlab platform.
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eurasian perch Perca fluviatilis spatial behaviour determines vulnerability independent of angler skill in a whole lake reality mining experiment
Canadian Journal of Fisheries and Aquatic Sciences, 2018Co-Authors: Christopher T Monk, Robert ArlinghausAbstract:To understand the determinants of angling vulnerability arising from the interplay of fish and angler behaviour, we tracked 33 large Eurasian perch, Perca fluviatilis, with fine-scale acoustic telemetry at a whole-lake scale while simultaneously tracking boats of small groups of experimental anglers (n = 104) who varied by self-reported skill. We report two key findings. First, perch vulnerability was strongly related to a repeatable habitat choice behaviour, but unrelated to swimming activity as a personality trait; importantly, highly vulnerable perch were captured throughout the lake and not only in their preferred habitat, suggesting covariance between spatial habitat choice and a behavioural determinant of vulnerability. Second, catch per unit effort of large perch increased with self-reported angling skill, an effect unrelated to skill-dependent lure use or an angler’s ability to encounter perch. Importantly, high-skill anglers captured more fish but not different spatial behavioural phenotypes. Our...
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Size-dependent foraging niches of European Perch Perca fluviatilis (Linnaeus, 1758) and North American Yellow Perch Perca flavescens (Mitchill, 1814)
Environmental Biology of Fishes, 2018Co-Authors: Stefan M. Linzmaier, Laura A. Twardochleb, Julian D. Olden, Thomas Mehner, Robert ArlinghausAbstract:Body size of consumer species is a fundamental trait that influences the trophic ecology of individuals and their contribution to the functioning of freshwater ecosystems. However, the relationship between body size and trophic ecology can be highly variable both within and between closely-related and similarly-sized species. In this study we compared the intra- and interspecific relationship between body size and trophic position for North American Yellow Perch Perca flavescens and European Perch Perca fluviatilis , which share similarities in morphology, life history traits and trophic requirements. We used stable isotope ratios (δ^15N and δ^13C) to characterize differences in size-dependency of trophic position and to trace consumer foraging history of Yellow Perch in lakes in the Northwestern United States and European Perch in lakes in Germany. The trophic position and stable isotope ratios of Yellow Perch and European Perch steadily increased with total body length, but European Perch were consistently feeding at higher trophic positions than Yellow Perch at a given length. European Perch occupied considerably higher trophic positions (mean trophic position = 3.9) than Yellow Perch (mean trophic position = 2.8). Large European Perch were increasingly piscivorous, whereas large Yellow Perch were more opportunistic and omnivorous predators of invertebrate prey. Overall, the trophic position among individual Yellow Perch varied more strongly than in European Perch. We conclude that both species similarly increase in trophic position with size, but the specific size-dependency of both trophic position and resource use varies with taxonomy and local ecological conditions. Thus, body size as a sole measure of trophic position should be considered cautiously when generalizing across populations and species.
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explaining recreational angling catch rates of eurasian perch Perca fluviatilis the role of natural and fishing related environmental factors
Fisheries Management and Ecology, 2013Co-Authors: Lisa Heermann, Robert Arlinghaus, Matthias Emmrich, Martina Heynen, Malte Dorow, U Konig, Jost BorcherdingAbstract:Angling catch records are frequently used to reveal fish population developments. It is therefore important to understand the determinants of angling catches. This study focused on angler-related, biotic and abiotic factors influencing catchability of Eurasian perch, Perca fluviatilis L. A multi-lake (21 lakes) study based on angling diaries collected in Mecklenburg-Vorpommern, Germany (2006/2007), found that angler-related factors such as fishing experience, species preference and bait/lure type had a large impact on perch catch rates. Additionally, environmental conditions (nutritional status and water transparency) affected either the size or the number of perch caught by anglers. Catch rates varied seasonally, which was confirmed by an experimental fishery on a gravel pit (2008). This portion of the study showed that altered food availabilities in the course of the year caused food limitation in perch, which in turn facilitated high catch rates and female-biased exploitation in autumn. It is concluded that both angler-related and abiotic factors interact affecting perch catch rates and size of perch captured in recreational angling.
Lars G Rudstam - One of the best experts on this subject based on the ideXlab platform.
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year class variation drives interactions between warm water predators and yellow perch
Canadian Journal of Fisheries and Aquatic Sciences, 2016Co-Authors: William W. Fetzer, Collin J Farrell, James R Jackson, Lars G RudstamAbstract:Walleye (Sander vitreus), smallmouth bass (Micropterus dolomieu), and largemouth bass (Micropterus salmoides) are common top predators across many north temperate lakes, but no previous analyses have assessed factors driving their combined impact on mortality of a shared prey, yellow perch (Perca flavescens). We estimated consumption dynamics of walleye, smallmouth bass, and largemouth bass during 3 years that differed in age-0 yellow perch year-class strength and evaluated the relative contribution of each predator to age-0 yellow perch mortality, in Oneida Lake, New York, USA. Habitat-specific diet composition and population densities were integrated with temperature and growth rates to parameterize a bioenergetics model and estimate annual consumption of major diet items. Walleye were the dominant predator in both offshore and inshore habitats, while smallmouth bass and largemouth bass were also important inshore predators. Consumption of age-0 yellow perch by all three predators was positively correla...
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modeling turbidity type and intensity effects on the growth and starvation mortality of age 0 yellow perch
Canadian Journal of Fisheries and Aquatic Sciences, 2014Co-Authors: Nathan F Manning, Lars G Rudstam, Christine M Mayer, Jonathan M Bossenbroek, David B Bunnell, Jeff T Tyson, James R JacksonAbstract:We sought to quantify the possible population-level influence of sediment plumes and algal blooms on yellow perch (Perca flavescens), a visual predator found in systems with dynamic water clarity. We used an individual-based model (IBM), which allowed us to include variance in water clarity and the distribution of individual sizes. Our IBM was built with laboratory data showing that larval yellow perch feeding rates increased slightly as sediment turbidity level increased, but that both larval and juvenile yellow perch feeding rates decreased as phytoplankton level increased. Our IBM explained a majority of the variance in yellow perch length in data from the western and central basins of Lake Erie and Oneida Lake, with R2 values ranging from 0.611 to 0.742. Starvation mortality was size dependent, as the greatest daily mortality rates in each simulation occurred within days of each other. Our model showed that turbidity-dependent consumption rates and temperature are key components in deter- mining growth and starvation mortality of age-0 yellow perch, linking fish production to land-based processes that influence water clarity. These results suggest the timing and persistence of sediment plumes and algal blooms can drastically alter the growth potential and starvation mortality of a yellow perch cohort.
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cormorant predation and the population dynamics of walleye and yellow perch in oneida lake
Ecological Applications, 2004Co-Authors: Lars G Rudstam, Anthony J Vandevalk, Connie M Adams, Jeremy T H Coleman, John L Forney, Milo E RichmondAbstract:Double-crested Cormorants (Phalacrocorax auritus) increased dramatically in North America during the 1990s, providing the opportunity to study the effects of an increase of a top predator on an existing predator–prey system. In Oneida Lake, New York, USA, Double-crested Cormorants were first observed nesting in 1984 and had increased to over 360 nesting pairs by 2000. Concomitant with this increase in piscivorous birds was a decrease in the adult walleye (Stizostedion vitreum) and yellow perch (Perca flavescens) populations. Analysis of a 40-yr data series shows higher mortality of subadults (age 1–2 yr perch and age 1–3 yr walleye) for both species in the 1990s compared to the previous three decades. Cormorant diet was investigated from 1995 to 2000 using a combination of cast pellets, regurgitants, and stomach analysis. Walleye and yellow perch were a major portion of the cormorant diet during these years (40–82% by number). The number of subadult walleye and yellow perch consumed by cormorants suggests...
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response of yellow perch Perca flavescens in oneida lake new york to the establishment of zebra mussels dreissena polymorpha
Canadian Journal of Fisheries and Aquatic Sciences, 2000Co-Authors: Christine M Mayer, Lars G Rudstam, Anthony J Vandevalk, John L Forney, Edward L MillsAbstract:We used long-term data on Oneida Lake, New York, to evaluate hypotheses about the effects of introduced zebra mussels (Dreissena polymorpha) on yellow perch (Perca flavescens). We detected no change in survival, diet, or numbers of young-of-the-year (YOY) yellow perch. YOY growth increased in association with zebra mussel introduc- tion and was marginally correlated with zooplankton size, which increased after zebra mussel introduction. Low num- bers of YOY in recent years did not explain their increased growth rate. The percentage of age 3 and older yellow perch that consumed zooplankton and benthos increased after zebra mussel introduction. Water clarity, which has increased since zebra mussel introduction, was inversely related to the percentage of the adult population with empty stomachs and positively related to the percentage that consumed benthos. The percentage of adult yellow perch that consumed zooplankton was positively related to zooplankton size. Despite the increase in percentage of adults consum- ing both types of invertebrate prey, we detected no changes in adult growth associated with zebra mussel introduction. This suggests that the principal effects of zebra mussels on yellow perch in Oneida Lake were not via benthic path- ways but through modifications of water clarity and zooplankton. Thus far, these effects have not been negative for the yellow perch population.
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gape limitation and prey selection in larval yellow perch Perca flavescens freshwater drum aplodinotus grunniens and black crappie pomoxis nigromaculatus
Canadian Journal of Fisheries and Aquatic Sciences, 1991Co-Authors: Denise M Schael, Lars G Rudstam, John R. PostAbstract: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 fish...
Patrice Couture - One of the best experts on this subject based on the ideXlab platform.
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seasonal variations in tissue metabolic capacities of yellow perch Perca flavescens from clean and metal contaminated environments
Canadian Journal of Fisheries and Aquatic Sciences, 2003Co-Authors: Debbie Audet, Patrice CoutureAbstract:This study examined seasonal variations in tissue metal contamination and physiological condition of yellow perch (Perca flavescens) from a clean lake (Halfway Lake) and a metal-contaminated enviro...
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effects of environmental metal contamination on the condition swimming performance and tissue metabolic capacities of wild yellow perch Perca flavescens
Canadian Journal of Fisheries and Aquatic Sciences, 2002Co-Authors: James W Rajotte, Patrice CoutureAbstract:In this study, the general condition, swimming capacities, and tissue metabolic capacities and metal concentrations in wild yellow perch (Perca flavescens) were examined from a range of metal-conta...
