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Academic literature on the topic 'Fish Lake Site (Ill.)'
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Journal articles on the topic "Fish Lake Site (Ill.)"
1
Binder, Thomas R., Stephen C. Riley, Christopher M. Holbrook, et al. "Spawning site fidelity of wild and hatchery lake trout (Salvelinus namaycush) in northern Lake Huron." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 1 (2016): 18–34. http://dx.doi.org/10.1139/cjfas-2015-0175.
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Fidelity to high-quality spawning sites helps ensure that adults repeatedly spawn at sites that maximize reproductive success. Fidelity is also an important behavioural characteristic to consider when hatchery-reared individuals are stocked for species restoration, because artificial rearing environments may interfere with cues that guide appropriate spawning site selection. Acoustic telemetry was used in conjunction with Cormack–Jolly–Seber capture–recapture models to compare degree of spawning site fidelity of wild and hatchery-reared lake trout (Salvelinus namaycush) in northern Lake Huron. Annual survival was estimated to be between 77% and 81% and did not differ among wild and hatchery males and females. Site fidelity estimates were high in both wild and hatchery-reared lake trout (ranging from 0.78 to 0.94, depending on group and time filter), but were slightly lower in hatchery-reared fish than in wild fish. The ecological implication of the small difference in site fidelity between wild and hatchery-reared lake trout is unclear, but similarities in estimates suggest that many hatchery-reared fish use similar spawning sites to wild fish and that most return to those sites annually for spawning.
2
Willis, Theodore V., and John J. Magnuson. "Patterns in fish species composition across the interface between streams and lakes." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 5 (2000): 1042–52. http://dx.doi.org/10.1139/f00-028.
Full textAbstract:
We compared fish species compositions among four site types (lake, lake mouth, stream mouth, stream) along the gradient from stream to lake for 12 tributary mouths. Comparison of species richness, rarefaction species diversity, and species density all supported the same pattern: stream-mouth sites contained the highest number of species, followed by stream sites, lake-mouth sites, and lake sites, even though lake and lake-mouth sites yielded more individuals and were larger in area and volume. Principal components analysis formed three clusters of mixed sites based on similarities in dominant fish species rather than designations of lake, lake mouth, etc. Rank order assemblage tests revealed that species composition of tributary-mouth sites was similar in only one quarter of the systems sampled; other systems showed a transition from "lake" to "stream" species compositions at or near the tributary mouth. Species assemblage comparisons within site types between systems revealed low consistency in the composition of stream-mouth sites and high consistency for the other site types. We concluded that the tributary mouth fits the definition of an ecotone and speculate that the difference in hydrologic and geomorphic properties of streams and lakes played a role in the patterns that we saw on either side of the tributary mouth.
3
Girard, Caroline, Julie C. Brodeur, and Alice Hontela. "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 55, no. 2 (1998): 438–50. http://dx.doi.org/10.1139/f97-224.
Full textAbstract:
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. The reduced ability of wild fish from contaminated sites to respond to a standardized ACTH challenge may be used as an early indicator of contamination-induced chronic stress.
4
Ching, Hilda Lei. "Occurrence of the eyefluke, Diplostomum (Diplostomum) baeri bucculentum Dubois et Rausch, 1948, in salmonid fishes of northern British Columbia." Canadian Journal of Zoology 63, no. 2 (1985): 396–99. http://dx.doi.org/10.1139/z85-060.
Full textAbstract:
As a result of experimental infections in chicks, diplostomula found in the retina of chinook salmon from the Nechako River were identified as Diplostomum (Diplostomum) baeri bucculentum. Eyeflukes in other salmonids were considered to be the same species based on similar measurements and site in the eyes. These eyeflukes varied in prevalence and mean intensity in seven salmonid species surveyed in nine localities in 1979–1981. The following fish were sampled: rainbow trout (Salmo gairdneri), 505; mountain whitefish (Prosopium williamsoni), 334; lake whitefish (Coregonus clupeaformis), 32; Dolly Varden (Salvelinus malma), 66; lake trout (S. namaycush), 13; kokanee or sockeye salmon (Oncorhynchus nerka), 323; and chinook salmon (O. tshawytscha), 164. Eyeflukes had prevalences ranging from 84 to 100% in six lakes, 64% in the river, 53% in one reservoir site, and a prevalence of 15% in the other reservoir site. Mountain and lake whitefishes had high mean intensities while kokanee had low mean intensities. Correlation of increased intensity with increased fish size was significant for 6 of 27 samples. Four samples of lake whitefish, mountain whitefish, rainbow trout, and chinook salmon showed significant asymmetry when numbers of diplostomula were compared between eyes. More of the heavily infected fish showed asymmetry than did the lightly infected fish.
5
Watson, Breanna M., Carlo A. Biagi, Sara L. Northrup, et al. "Distinct diel and seasonal behaviours in rainbow trout detected by fine-scale acoustic telemetry in a lake environment." Canadian Journal of Fisheries and Aquatic Sciences 76, no. 8 (2019): 1432–45. http://dx.doi.org/10.1139/cjfas-2018-0293.
Full textAbstract:
The fine-scale behavioural activities of rainbow trout (Oncorhynchus mykiss) in nature are not well understood, but are of importance for identifying interactions with the ecosystem and of interest to conservationists and recreational anglers. We have undertaken a high-resolution acoustic telemetry study to identify the distinct movement patterns of 30 rainbow trout in a freshwater lake, specifically examining swim speed, area of movement, and site preference in both summer and winter. Activity levels were reduced in winter compared with summer across all fish, but ranking of individuals was consistent. In summer, 16/30 fish displayed diel movement, in which they travelled to a different area of the lake at dawn and returned at dusk, while other fish maintained their site preference regardless of the time of day or swam more randomly throughout the lake. These patterns were minimized in winter, where there was a reduction in cross-lake movement under ice and only 4/30 fish displayed diel movement. Winter conditions may limit the capability (physiological limitations) and (or) motivation (prey availability) for diel behaviours observed in summer.
6
Blanchfield, Paul J., Lori S. Tate, and Cheryl L. Podemski. "Survival and behaviour of rainbow trout (Oncorhynchus mykiss) released from an experimental aquaculture operationThis paper is part of the series “Forty Years of Aquatic Research at the Experimental Lakes Area”." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 11 (2009): 1976–88. http://dx.doi.org/10.1139/f09-127.
Full textAbstract:
The potential for farmed fish that have escaped from open-cage aquaculture operations to affect native populations will depend on their survival and behaviour in the wild. We used standard commercial practices to rear 10 tonnes of rainbow trout ( Oncorhynchus mykiss ) in a 23 ha lake at the Experimental Lakes Area (Ontario, Canada). Each fall (2003–2005), we released farmed rainbow trout (escapees) into the study lake and monitored their movements using automated positioning telemetry. Rainbow trout experienced high annual mortality (~50%), with none surviving beyond 3 years. Farmed fish had narrowly defined pelagic distributions that comprised the upper few metres of the water column, even when at the cage site. Although released rainbow trout dispersed throughout the study lake, most spent significant portions of time at the cage site, especially during normal operation when commercial feed was available. Core use areas (50% Kernel) included the farm for half of the released fish. Surviving rainbow trout showed continued reliance upon the cage site in their second year. However, wide dispersal, high growth rate, and lack of reliance on the cage site by some escaped fish warrant further research to assess potential effects of open-cage aquaculture in the water bodies where the industry occurs.
7
Trewin, Nigel H. "Palaeoecology and sedimentology of the Achanarras fish bed of the Middle Old Red Sandstone, Scotland." Transactions of the Royal Society of Edinburgh: Earth Sciences 77, no. 1 (1986): 21–46. http://dx.doi.org/10.1017/s0263593300010737.
Full textAbstract:
ABSTRACTThe Achanarras fish bed of Middle Devonian age in the Orcadian Basin was deposited in a large freshwater lake of variable productivity in which thermal stratification was normally developed. The fish bed consists of lacustrine laminites of organic, carbonate (dolomite and calcite) and clastic types. Carbonate laminae were precipitated as a result of photosynthetic activity and organic laminae were deposited following algal decay, clastic material was introduced by processes including overflow and interflow currents and wind transport.The fish bed represents a major lacustrine transgression during a wetter climatic period which provided connections to other lakes and by overflow to the sea. Calcitic laminites represent the deepest water (>60 m) phase with greatest faunal variety due to availability of migration routes and stability of environments caused by lake overflow.Initial lake transgression was characterised byDipteras-dominated faunas which reappear as the last surviving fish during lake regression. Further regression resulted in the introduction of turbidites to the laminites.Many fish were preserved following mass mortalities induced by algal blooms, mixing of waters by storms and lake overturn. Most of the fish inhabited shallow areas of the lake and drifted as rotting carcases to their final site of deposition. The fauna comprises a variety of benthonic and nektonic fish including predators, scavengers and omnivorous forms. Fish such asCoccosteusrepresented almost exclusively by adults may have bred outside the area of the lake.
8
Pietrock, Michael, and Olesya Hursky. "Fish and ecosystem health as determined by parasite communities of lake whitefish (Coregonus clupeaformis) from Saskatchewan boreal lakes." Water Quality Research Journal 46, no. 3 (2011): 219–29. http://dx.doi.org/10.2166/wqrjc.2011.004.
Full textAbstract:
In northern Canada, there is increasing concern about the potential negative impacts of industrial activities on wildlife and ecosystems. Therefore, a study was conducted on lake whitefish (Coregonus clupeaformis) from Montreal and Reindeer lakes, Saskatchewan, to assess fish health and condition, and ecosystem integrity of these northern lakes. In Montreal Lake, all fish were infected by ≥2 parasite species. The most prevalent parasite at this site was the larval trematode Ichthyocotylurus erraticus, which was detected in all fish examined. All Reindeer Lake whitefish were shown to harbour ≥1 parasite species. The most prevalent parasite (found in 87.9% of fish) at this locality was the larval trematode Diplostomum sp. Macroscopically visible pathogenic changes were not noted. Gross energy values of whitefish were 4.40 ± 0.88 MJ/kg and 5.14 ± 1.14 MJ/kg for Montreal Lake and Reindeer Lake, respectively, indicating that fish have sufficient energy stores to withstand stressful conditions. The parasite communities were species-rich and diverse, with Shannon diversity indices of 2.12 (Montreal Lake) and 2.02 (Reindeer Lake). The ratios of allogenic/autogenic as well as planktonic/benthic parasite species did not indicate atypical environmental conditions. Together the findings suggest that in both lakes there is currently no significant anthropogenic impact on the whitefish populations and ecosystem health.
9
Long, Kelsie, David Heslop, and Eelco J. Rohling. "Quantitative assessment of the oxygen isotope composition of fish otoliths from Lake Mungo, Australia." Quaternary Research 102 (February 1, 2021): 234–46. http://dx.doi.org/10.1017/qua.2020.121.
Full textAbstract:
AbstractThe Willandra Lakes region is a series of once interconnected and now-dry lake basins in the arid zone of southeastern Australia. It is a UNESCO World Heritage Site of cultural, archaeological, and geological significance, preserving records of Aboriginal occupation and environmental change stretching back to at least 50 ka. Linking the archaeology with the commensurate palaeoenvironmental information is complicated by the millennial time spans represented by the past hydrological record preserved in the sediment vs. the subdecadal evidence of each archaeological site. Oxygen isotope records across annual growth rings of fish otoliths (ear stones) can elucidate flooding and drying regimes on subannual scales. Otoliths from hearth sites (fireplaces) link lake hydrology with people eating fish on the lakeshore. Oxygen isotopic trends in hearth otoliths from the last glacial maximum (LGM) were previously interpreted in terms of high evaporation under dry conditions. However, this ignored hydrology-driven changes in water δ18O. Here, a mass balance model is constructed to test the effect lake desiccation has on water δ18O and how this compares with the LGM otolith records. Based on this modelling, we suggest that Lake Mungo otolith signatures are better explained by evaporation acting on full lakes rather than by lake drying.
10
Mercer, Margaret, Peter C. Searle, Roberto Cifuentes, Evelyn Habit, and Mark C. Belk. "Morphometric Response of Galaxias maculatus (Jenyns) to Lake Colonization in Chile." Diversity 12, no. 6 (2020): 219. http://dx.doi.org/10.3390/d12060219.
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Body and head shape in fish responds to environmental factors such as water flow rate, food sources, and niche availability. However, the way in which fish respond to these environmental factors varies. In Central Chile, multiple river and lake systems along the coast provide an ideal study site to investigate these types of shape changes. We use geometric morphometrics to characterize shape differences in Galaxias maculatus (Jenyns) between river and lake populations. Lake fish converge on a shape with a more fusiform body, narrower head, and larger eyes, while river fish have a more robust body, rounder head, and smaller eyes. These shape changes are consistent with a shift to zooplanktivorous foraging in lakes, as evidenced in other systems. Unlike some fish species that develop polymorphisms in body shape after colonization (e.g., benthic and limnetic forms), G. maculatus in lakes exhibit a monomorphic limnetic form.