Diagnosis, Prevalence, and Prevention of the Spread of the Parasite Heterosporis Sp. (Microsporida: Pleistophoridae) in Yellow Perch (Perca Flavescens) and Other Freshwater Fish in Northern Minnesota, Wisconsin, and in Lake Ontario PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Diagnosis, Prevalence, and Prevention of the Spread of the Parasite Heterosporis Sp. (Microsporida: Pleistophoridae) in Yellow Perch (Perca Flavescens) and Other Freshwater Fish in Northern Minnesota, Wisconsin, and in Lake Ontario PDF full book. Access full book title Diagnosis, Prevalence, and Prevention of the Spread of the Parasite Heterosporis Sp. (Microsporida: Pleistophoridae) in Yellow Perch (Perca Flavescens) and Other Freshwater Fish in Northern Minnesota, Wisconsin, and in Lake Ontario by Peggy E. Miller. Download full books in PDF and EPUB format.
Author: Peggy E. Miller
Publisher:
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 98
Get Book Here
Book Description
A previously unknown microsporidian parasite that severely degrades muscle of yellow perch (Perca flavescens) from lakes in Minnesota, Wisconsin, and Lake Ontario was identified as belonging to the genus Heterosporis. This parasite is characterized by pyriform-shaped spores that are contained in sporophorocysts. In the wild, yellow perch, burbot (Lota lota), mottled sculpin (Cottus bairdi), trout-perch (Percopsis omiscomaycus), pumpkinseed (Lepomis gibbosus), northern pike (Esox lucius), walleye (Sander vitreus) and rock bass (Ambloplites rupestris) harbor Heterosporis naturally, but laboratory studies showed that 12 other fish species are susceptible to infection. In laboratory trials, smallmouth bass (Micropterus dolomieui) consumed significantly more fathead minnows infected with Heterosporis sp. than uninfected. Microscopically, Heterosporis sp. infection can be detected in the muscle of fish two weeks after exposure, and visually identified after seven weeks. To confirm infection, a PCR diagnostic assay was developed. Heterosporis spores are rendered noninfective by freezing, desiccation for 24 h, exposure to 2,200 mg/L bleach, and aging in air-exposed water for six months. This parasite can infect a wide range of fish species which can lead to devastating losses in commercial and sport fishing; however, there are preventative measures that may limit the spread of the parasite.
Author: Peggy E. Miller
Publisher:
ISBN:
Category : Freshwater fishes
Languages : en
Pages : 98
Get Book Here
Book Description
A previously unknown microsporidian parasite that severely degrades muscle of yellow perch (Perca flavescens) from lakes in Minnesota, Wisconsin, and Lake Ontario was identified as belonging to the genus Heterosporis. This parasite is characterized by pyriform-shaped spores that are contained in sporophorocysts. In the wild, yellow perch, burbot (Lota lota), mottled sculpin (Cottus bairdi), trout-perch (Percopsis omiscomaycus), pumpkinseed (Lepomis gibbosus), northern pike (Esox lucius), walleye (Sander vitreus) and rock bass (Ambloplites rupestris) harbor Heterosporis naturally, but laboratory studies showed that 12 other fish species are susceptible to infection. In laboratory trials, smallmouth bass (Micropterus dolomieui) consumed significantly more fathead minnows infected with Heterosporis sp. than uninfected. Microscopically, Heterosporis sp. infection can be detected in the muscle of fish two weeks after exposure, and visually identified after seven weeks. To confirm infection, a PCR diagnostic assay was developed. Heterosporis spores are rendered noninfective by freezing, desiccation for 24 h, exposure to 2,200 mg/L bleach, and aging in air-exposed water for six months. This parasite can infect a wide range of fish species which can lead to devastating losses in commercial and sport fishing; however, there are preventative measures that may limit the spread of the parasite.
Author: Moh A. Alkhamis
Publisher: Frontiers Media SA
ISBN: 2889456587
Category :
Languages : en
Pages : 109
Get Book Here
Book Description
The repertoire of quantitative analytical techniques in disciplines such as ecology, decision science, and evolutionary biology has grown, in part enabled by the development and increased availability of computational resources. Integration of cutting-edge, quantitative tools into veterinary epidemiology that have been borrowed from such disciplines has offered opportunities to advance the study of disease dynamics in animal populations, to improve and guide decision-making related to disease prevention, control, or eradication. Furthermore, the need to explore new analytical methods for veterinary epidemiology has been driven by the increasing availability and complexity of animal disease data. The objective of this e-book is to contribute to current methods in epidemiology by 1) presenting and discussing novel analytical tools that help advance our understanding of epidemiology; and 2) demonstrating how inferences emerging from the application of novel analytical tools can be incorporated into decision-making related to animal health. The e-book constitutes a collection of articles that explore the applications of a variety of analytical methods such as machine learning, Bayesian risk assessment and an advanced form of social network analysis in the modern epidemiologic study of animal diseases.
Author: Michael W. Johnson
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Get Book Here
Book Description
The fish parasite communities of four Canadian Shield lakes (L239, L240, L377 and Triangle Lake) in the Experimental Lakes Area (ELA), Ontario were surveyed over three seasons in 1997 and 1998 and one season in 1999. Thirteen of fifteen fish species sampled from the study lakes harboured parasites; northern pike (Esox lucius), lake cisco (Coregonus artedii), pearl dace (Margariscus margarita), blacknose shiner (Notropis heterolepis), spottail shiner (Notropis hudsonius), fathead minnow (Pimephales promelas), longnose dace (Rhinichtys cataractae), white sucker (Catostontus commersoni), burbot (Lota lota), brook stickleback (Culea inconslans), slimy sculpin (Cottus cognatus), Iowa darter (Etheostoma exile) and yellow perch (Perca flavescens). A total of 112,188 parasites were detected, with 87% (n = 1926) of the necropsied fish having at least one parasite. Forty-one species of parasites representing 32 genera and 26 families were found; 35 species used fish as definitive hosts and six species used birds as the definitive hosts. The most omnivorous fish species (perch, white sucker and pearl dace) had the most diverse parasite infracommunities while the most specialized consumers had the least diverse parasite infracommunities (the piscivores, pike and burbot and the zooplanktivorous cisco) or lacked parasites entirely (the algavorous northern redbelly dace, Phoxinus eos, and finescale dace, P. neogaeus). The parasite communities of the four ELA lakes were less speciose than those reported from larger lacustrine systems in Ontario and Manitoba. The parasite community composition of yellow perch was typical of perch in other systems, however, there were new host and locality records for several parasite species infecting other fish species. For example, the pearl dace was infected with five parasites not previously reported from this host in North America and two not previously reported from this host in Canada. There were distinct seasonal and age-related trends in the parasite communities of yellow perch populations that correlated with seasonal and ontogenetic dietary shifts, respectively. Understanding parasite community structure can improve understanding of host population ecology and clarify many aspects of ecosystem biotic and abiotic interactions. Detailed analysis as performed in this study is a useful tool for describing the factors affecting parasite community composition. A restricted invertebrate and fish fauna in these nutrient poor lakes can be important in controlling the parasite fauna infecting yellow perch, which could be more predictable than that observed in large, productive lakes. Allogenic parasites are most common in Triangle Lake and enterics in L239. Parasite species richness is highest in L239 and diversity is highest in L240. Glugea sp. is the most dominant and abundant parasite species in all but Triangle Lake. Triangle Lake and L377 perch have the fastest growth rates and reach the greatest total length and age of all sampled perch. Yellow perch length and age are both highly correlated with parasite richness, intensity and abundance. Female perch usually had significantly greater species richness than males but intensity and abundance were significantly higher than males in only two lakes each. L239 and Triangle Lake had parasite assemblages that were significantly non-random largely due to subpopulations of parasite species transmitted through macrobenthos. Perch parasite communities in all four lakes showed significantly more nestedness than expected by chance. Parasite-induced pathology of yellow perch was also examined in these shield lakes. Glugea sp. xenomas in cells of the intestinal wall and in visceral fat and Apophallus brevis metacercariae infecting the musculature reduced the growth of perch resulting in mortality in younger and smaller fish. High numbers of Raphidascaris acus, encysted in the liver of yellow perch, correlated significantly with a reduction in visceral fat weight in 1+ females and 0+ and 1+ males. A significant correlation in these subsamples indicates that host sex, size, trophic status and relative weight of the liver are linked to R. acus density. The data suggests that interactions among parasitic infections and age, size and sex of the fish host can affect growth and survival of the host, especially during periods of low energy inputs and reproductive stress. Stable isotopes (C and N) have proven to be important tools for obtaining information on the trophic relationships within food webs. Combining parasite community studies with stable isotopes could improve the effectiveness of detailed food web analyses. Parasite communities are particularly useful since they can identify both prey and non-prey components of the host's community. Triangle Lake perch had distinct isotope ratios that separated them from the other three populations. Stable C isotope ratios for all perch ranged from - -340/00 to -190/00 while stable N isotope ratios ranged from - 4.50/00 to 12.50/00. These ranges are larger than those observed in many other fish species. Perch diet was the most significant predictor of stable C isotope ratio. Perch parasite fauna was the most significant predictor of stable N ratios. In particular, parasite fauna indicative of zooplanktivorous or piscivorous perch were most accurate for predicting fish trophic position and thus stable isotope ratio. Fish length and age showed no significant relationship with isotope ratios.
Author: Douglas Lee Peterson
Publisher:
ISBN:
Category : Yellow perch
Languages : en
Pages : 168
Get Book Here
Book Description
Author: Natalie MacCormack
Publisher:
ISBN:
Category : Yellow perch
Languages : en
Pages : 44
Get Book Here
Book Description
Author: George Pardalis
Publisher:
ISBN:
Category : Yellow perch
Languages : en
Pages : 106
Get Book Here
Book Description
Author: Kenneth Martin Johnson
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 180
Get Book Here
Book Description
Author: Edward Schneberger
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 28
Get Book Here
Book Description
Author: Benjamin Keith Diggles
Publisher:
ISBN: 9780980699500
Category : Aquatic animals
Languages : en
Pages : 296
Get Book Here
Book Description
Author: Phillip Sheridan Parker
Publisher:
ISBN:
Category : Lampreys
Languages : en
Pages : 36
Get Book Here
Book Description
Most of the experimental lampreys were mature and rip after 14 to 18 months of parasitic life. They exhibited signs of irreversible physical degeneration which precedes death. Three specimens were immature at 14, 18, and 26 months in aquariums, thus indicating that under certain conditions, lampreys may extend their parasitic phase.
