Bibliografie tematiche / Salmonids

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Letteratura scientifica selezionata sul tema "Salmonids"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 8 febbraio 2022

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Articoli di riviste sul tema "Salmonids"

1

Todd, C. D., A. M. Walker, M. G. Ritchie, J. A. Graves e A. F. Walker. "Population genetic differentiation of sea lice (Lepeophtheirus salmonis) parasitic on Atlantic and Pacific salmonids: analyses of microsatellite DNA variation among wild and farmed hosts". Canadian Journal of Fisheries and Aquatic Sciences 61, n. 7 (1 luglio 2004): 1176–90. http://dx.doi.org/10.1139/f04-069.

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Abstract (sommario):
The copepod Lepeophtheirus salmonis is ectoparasitic on Atlantic and Pacific wild salmonids. It is a major pest to Atlantic salmon (Salmo salar) aquaculture and may be implicated in recent declines of certain European wild salmonid stocks. Variation at six microsatellite loci was assessed among L. salmonis from wild and farmed salmonids in Scotland, wild sea-run brown trout (Salmo trutta) in Norway, and farmed Atlantic salmon in eastern Canada. An outgroup North Pacific sample was obtained from farmed Atlantic salmon in British Columbia. No significant differentiation was found between L. salmonis from the host species or among samples from throughout the North Atlantic. This is consistent with long-distance oceanic migration of wild hosts and larval interchange between farmed and wild host stocks being sufficient to prevent genetic divergence of L. salmonis throughout the North Atlantic. These results have important management implications for both wild stock conservation and aquaculture in that genetically, L. salmonis in the North Atlantic comprises a single population: there is no evidence of isolation of populations on farmed hosts from those on wild fish. Comparison between North Pacific and North Atlantic L. salmonis populations showed significant but low differentiation (FST = 0.06).
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2

Krueger, C. C., e B. May. "Ecological and Genetic Effects of Salmonid Introductions in North America". Canadian Journal of Fisheries and Aquatic Sciences 48, S1 (19 dicembre 1991): 66–77. http://dx.doi.org/10.1139/f91-305.

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Abstract (sommario):
Stocking of non-native Salmoninae into North American waters began around 1870. Brown trout (Salmo trutta) from Europe established populations across North America and is the only successful inter-continental introduction. Introductions of native salmonids within North America but outside their native ranges have been common. Ecological effects of salmonid introductions. include competition, predation on native salmonids and other fishes, environmental modification through digging of redds in stream bottom substrates during spawning, and introduction of parasites and disease to native fish. Direct genetic effects from stocked salmonids are caused by interbreeding with native species. Indirect genetic effects may result through selective forces and/or a reduction of effective population size, genetic drift, and inbreeding. Management actions used to remove non-native salmonid populations include chemical reclamation and construction of barriers to movement. Salmonid stocking as a management practice is appropriate for species or population rehabilitation. Continued stocking of non-native salmonids should cease where viable native salmonid populations exist. New introductions of Eurasian species should not be made because effects are unpredictable. Aquaculture and the creation of transgenic fish pose special threats to North American salmonids. The era of widespread, intentional introductions of salmonids by man justifiably is drawing to a close.
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3

Bui, Samantha, Elina Halttunen, Agnes M. Mohn, Tone Vågseth e Frode Oppedal. "Salmon lice evasion, susceptibility, retention, and development differ amongst host salmonid species". ICES Journal of Marine Science 75, n. 3 (12 dicembre 2017): 1071–79. http://dx.doi.org/10.1093/icesjms/fsx222.

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Abstract With different ecological characteristics amongst salmonid species, their response to parasitic infestation is likely to vary according to their spatial and temporal overlap with the parasite. This study investigated the host–parasite interactions amongst three species of salmonids and the ectoparasitic salmon louse, Lepeophtheirus salmonis. To determine any variation in infestation parameters amongst salmonids, single population groups of Atlantic salmon (Salmo salar), chinook salmon (Onchorhynchus tshawytscha), and previously-infested and naïve sea trout (Salmo trutta) were exposed to a controlled infestation challenge. We found that chinook salmon and both sea trout groups were more susceptible to acquiring lice than Atlantic salmon. Behavioural responses during infestation were more pronounced in Atlantic and chinook salmon. Parasite development was similar in lice attached to Atlantic salmon and sea trout, but hindered on chinook salmon. At 16 days post-infestation, chinook salmon had reduced lice loads to the same level as Atlantic salmon, whilst sea trout retained their lice. These results demonstrate differences in interactions with L. salmonis amongst these species, and highlight the vulnerability of sea trout to infestation.
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4

Clusa, Laura, Alba Ardura, Sara Fernández, Agustín A. Roca e Eva García-Vázquez. "An extremely sensitive nested PCR-RFLP mitochondrial marker for detection and identification of salmonids in eDNA from water samples". PeerJ 5 (28 febbraio 2017): e3045. http://dx.doi.org/10.7717/peerj.3045.

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Abstract (sommario):
BackgroundSalmonids are native from the North Hemisphere but have been introduced for aquaculture and sport fishing in the South Hemisphere and inhabit most rivers and lakes in temperate and cold regions worldwide. Five species are included in the Global Invasive Species Database: rainbow troutOncorhynchus mykiss, Atlantic salmonSalmo salar, brown troutSalmo trutta, brook troutSalvelinus fontinalis, and lake troutSalvelinus namaycush. In contrast, other salmonids are endangered in their native settings.MethodsHere we have developed a method to identify salmonid species directly from water samples, focusing on the Iberian Peninsula as a case study. We have designed nested Salmonidae-specific primers within the 16S rDNA region. From these primers and a PCR-RFLP procedure the target species can be unequivocally identified from DNA extracted from water samples.ResultsThe method was validated in aquarium experiments and in the field with water from watersheds with known salmonid populations. Finally, the method was applied to obtain a global view of the Salmonidae community in Nalón River (north coast of Spain).DiscussionThis new powerful, very sensitive (identifying the species down to 10 pg DNA/ml water) and economical tool can be applied for monitoring the presence of salmonids in a variety of situations, from checking upstream colonization after removal of river barriers to monitoring potential escapes from fish farms.
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5

Henríquez, Vitalia, María Verónica Rojas e Sergio H. Marshall. "An Alternative Efficient Procedure for Purification of the Obligate Intracellular Fish Bacterial Pathogen Piscirickettsia salmonis". Applied and Environmental Microbiology 69, n. 10 (ottobre 2003): 6268–71. http://dx.doi.org/10.1128/aem.69.10.6268-6271.2003.

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ABSTRACT Piscirickettsia salmonis is an obligate intracellular bacterial pathogen of salmonid fish and the etiological agent of the aggressive disease salmonid rickettsial syndrome. Today, this disease, also known as piscirickettsiosis, is the cause of high mortality in net pen-reared salmonids in southern Chile. Although the bacteria can be grown in tissue culture cells, genetic analysis of the organism has been hindered because of the difficulty in obtaining P. salmonis DNA free from contaminating host cell DNA. In this report, we describe a novel procedure to purify in vitro-grown bacteria with iodixanol as the substrate to run differential centrifugation gradients which, combined with DNase I digestion, yield enough pure bacteria to do DNA analysis. The efficiency of the purification procedure relies on two main issues: semiquantitative synchrony of the P. salmonis-infected Chinook salmon embryo (CHSE-214) tissue culture cells and low osmolarity of iodixanol to better resolve bacteria from the membranous structures of the host cell. This method resulted in the isolation of intact piscirickettsia organisms and removed salmon and mitochondrial DNA effectively, with only 1.0% contamination with the latter.
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6

Roby, Daniel D., Donald E. Lyons, David P. Craig, Ken Collis e G. Henk Visser. "Quantifying the effect of predators on endangered species using a bioenergetics approach: Caspian terns and juvenile salmonids in the Columbia River estuary". Canadian Journal of Zoology 81, n. 2 (1 febbraio 2003): 250–65. http://dx.doi.org/10.1139/z02-242.

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Abstract (sommario):
We estimated the consumption of juvenile salmonids (Oncorhynchus spp.) and other forage fishes by Caspian terns (Sterna caspia) nesting on Rice Island in the Columbia River estuary in 1997 and 1998 using a bioenergetics modeling approach. The study was prompted by concern that Caspian tern predation might be a substantial source of mortality to out-migrating juvenile salmonids from throughout the Columbia River basin, many populations of which are listed as threatened or endangered under the U.S. Endangered Species Act. The bioenergetics model used estimates of the energy requirements of the tern population and the proportion of tern energy requirements met by various prey types. The resulting estimate of the number of juvenile salmonids consumed by Rice Island Caspian terns was 8.1 million (5.9–10.4 million) in 1997 and 12.4 million (9.1–15.7 million) in 1998. Tern predation rates on juvenile salmonids were substantial, representing up to 15% of the juveniles to reach the estuary from some listed populations. Nevertheless, based on simple age-structured models of salmonid populations, it appears unlikely that management of Caspian tern predation alone would reverse salmonid declines. Management to reduce tern predation could, however, contribute to a comprehensive strategy to recover imperiled salmonid populations in the Columbia River basin.
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7

Clark, Thomas C., Pierre Boudinot e Bertrand Collet. "Evolution of the IRF Family in Salmonids". Genes 12, n. 2 (8 febbraio 2021): 238. http://dx.doi.org/10.3390/genes12020238.

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Abstract (sommario):
Interferon regulatory factors (IRFs) as a family, are major regulators of the innate antiviral response in vertebrates principally involved in regulating the expression of interferons (IFNs) and interferon-stimulated genes (ISGs). To date, nine IRFs have been identified in mammals with a 10th member also found in several avian and fish species. Through genome mining and phylogenetic analysis, we identified and characterised 23 irf genes in 6 salmonid species. This larger repertoire of IRF in salmonids results from two additional whole-genome duplications which occurred in early teleosts and salmonids, respectively. Synteny analysis was then used to identify and confirm which paralogues belonged to each subgroup and a new nomenclature was assigned to the salmonid IRFs. Furthermore, we present a full set of Real-Time PCR primers for all rainbow trout IRFs, confirmed by sequencing to ensure paralogue specificity. RT PCR was then used to examine the response of all trout irf genes in vivo, following Vibrio anguillarum and poly I:C stimulation, indicating potential functional divergence between paralogues. Overall, this study presents a comprehensive overview of the IRF family in salmonids and highlights some novel roles for the salmonid-specific IRFs in immunity.
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Scrudato, Ronald J., e William H. McDowell. "Upstream Transport of Mirex by Migrating Salmonids". Canadian Journal of Fisheries and Aquatic Sciences 46, n. 9 (1 settembre 1989): 1484–88. http://dx.doi.org/10.1139/f89-190.

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Abstract (sommario):
Mirex is a persistent chlorinated hydrocarbon found in appreciable concentrations in sediments and pelagic organisms of Lake Ontario. Concentrations are particularly high in introduced salmonids, which spawn in considerable numbers in tributaries of the Lake. We sampled the sediments and biota of several tributary streams in the Salmon River drainage basin. Greater concentrations of mirex were found in the resident brown trout (Salmo trutta) of tributaries accessible to migrating salmonids than in a nearby reference tributary inaccessible to migration. No significant differences in mirex concentrations were found in lower trophic levels (crayfish and stoneflies) or sediments, although mirex was detected in all samples. Because point sources of mirex are distant from these tributaries we conclude that migrating salmonids make a significant contribution to the upstream transport of mirex from Lake Ontario. Ingestion of salmonid eggs by brown trout, decomposition of salmonid carcasses by blowfly larvae, and ingestion of carcasses by aquatic and terrestrial scavengers are all means by which the contaminant is introduced to upstream environments.
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9

Sittenthaler, Marcia, Lucia Koskoff, Kurt Pinter, Ursula Nopp-Mayr, Rosemarie Parz-Gollner e Klaus Hackländer. "Fish size selection and diet composition of Eurasian otters (Lutra lutra) in salmonid streams: Picky gourmets rather than opportunists?" Knowledge & Management of Aquatic Ecosystems, n. 420 (2019): 29. http://dx.doi.org/10.1051/kmae/2019020.

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Abstract (sommario):
Knowledge on predator diet and drivers of prey selection is particularly of interest for an efficient management of predator and prey populations where predators potentially compete with humans for resources. Actual or perceived predation by Eurasian otter (Lutra lutra) on fish stocks generates conflicts in many countries. Recently, conflicts are heating up in riverine habitats, where multiple stressors affect stream fish populations. We combined dietary analysis of otter faeces and prey fish availability in three Austrian streams to assess spatial and seasonal differences in diet composition, the extent of (salmonid) fish consumption and the selection for specific salmonid fish sizes relative to their availability. Otters in upper reaches of temperate salmonid streams occupied a narrow trophic niche. Overall, otters fed predominantly on fish with salmonids dominating diet, both in terms of frequency and ingested biomass measures. Within the category of salmonids, otters selected for specific size classes. Concurrently, otters also displayed an opportunistic feeding behaviour, and seasonally and locally non-fish prey and other fish species than salmonids became key resources. Diet composition and salmonid size selection varied significantly within and between streams, which we relate to spatio-temporal variations of prey community composition and stream-specific habitat characteristics affecting prey vulnerability.
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Wood, C. C. "Predation of Juvenile Pacific Salmon by the Common Merganser (Mergus merganser) on Eastern Vancouver Island. I: Predation during the Seaward Migration". Canadian Journal of Fisheries and Aquatic Sciences 44, n. 5 (1 maggio 1987): 941–49. http://dx.doi.org/10.1139/f87-112.

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Predation of juvenile salmonids by the common merganser (Mergus merganser) was investigated during the period of seaward migration in two streams where fish populations are enhanced by spawning channels and hatcheries. Observation of foraging behaviour and crop-gullet contents indicated that, during this period, mergansers foraging on freshwater reaches of the streams ate juvenile salmonids almost exclusively whereas those foraging on tidal waters rarely ate salmonids. Maximum rates of salmonid mortality were estimated by assessing merganser abundance and the pattern of foraging activity on fresh versus tidal waters. Maximum mortality rate declined as fish abundance increased (i.e. mortality was depensatory) in all cases where the effects of prey size-selection could be ignored owing to an overwhelming abundance of one prey species. Bounds on maximum mortality rate by species for the entire migration period were computed under different hypotheses about the prey size-selection habits of mergansers; maximum mortality rate did not exceed 10% for any salmonid species over the entire seaward migration.
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Più fonti

Tesi sul tema "Salmonids"

1

Fast, Mark D. "Comparative susceptibilities of salmonids to Lepeophtheirus salmonis infections, biochemical and physiological studies". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ63257.pdf.

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2

Dawson, Leigh Helen Jane. "Physiological, behavioural and pathological effects of sea lice, Lepeophtheirus salmonis (Krøyer, 1837), on Salmonids". Thesis, University of Aberdeen, 1997. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU483280.

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Abstract (sommario):
This thesis examined the physiological, behavioural and pathological effects of sea lice, Lepeophtheirus salmonis (Krøyer, 1837), on wild sea trout, Salmo trutta L., and experimentally infected sea trout and Atlantic salmon, Salmo salar L. to determine how, and to what extent, sea lice cause mortality of their infected hosts. A feeding hierarchy was established in groups of sea lice infected and uninfected Atlantic salmon as a physiological stressor. Results indicated that chalimus did not stimulate physiological changes leading to marine mortality and the intensity of the sea lice infection on a fish was independent of that individual's food consumption. However, preadult stages caused appetite suppression, severe skin lesions and changes in the blood biochemistry of the fish with subsequent recovery to the levels of uninfected fish as the parasite moulted through to the adult stages of the lifecycle. The effects of sea lice on sea trout at either 2 or 6 weeks after sea water transfer were assessed. Both infection intensity and developmental rate were not significantly different between the groups, but a trend of fewer lice on the fish infected 6 weeks after sea water transfer was recorded. Fewer of the fish infected 2 weeks after sea water transfer had resumed feeding by the end of the experiment, leading to a loss of body condition, and suffered more severe damage to the skin and detrimental changes in the physiological integrity as a consequence of feeding preadult lice. The mortal impact of sea lice infection was significantly enhanced in the fish infected 2 weeks after sea water transfer. The findings from this thesis have shown that preadult sea lice can cause mortality of wild and experimentally infected sea trout and Atlantic salmon, particularly if infected at the time of sea water transfer, but under certain conditions sea lice infected hosts can recover from the detrimental effects of both chalimus and mobile stages.
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3

Turenne, Eric D. "Lipid Mobilization In Exercising Salmonids". Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37075.

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Abstract (sommario):
Animals rely on lipids as a major fuel for endurance exercise because they pack more joules per gram than any other fuel. However, in contrast to mammals, information on how the mobilization of lipids from endogenous stores is managed to meet the needs of energy metabolism in swimming fish is sparse. Information on in vivo rates of lipid mobilization in swimming fish has been limited to relatively low exercise intensities and has only been investigated in a single species. Therefore, the goal of my thesis was to address this paucity of information by quantifying lipolytic rate in rainbow trout during graded exercise and fatty acid mobilization in Atlantic salmon during prolonged endurance exercise. In the first part of my work, I hypothesized that like mammals, rainbow trout stimulate lipolysis above resting levels to a peak with increasing work intensity, but subsequently lower its rate at high intensities when ATP production from carbohydrates becomes dominant. To test this hypothesis, I measured the rate of appearance of glycerol (Ra glycerol) in the blood (resulting from the breakdown of triacylglycerol (TAG)) of trout at rest (control) and during graded exercise from rest to Ucrit. Results showed that Ra glycerol in trout averaged 1.24 ± 0.10 µmol kg -1 min-1 and that this rate was unaffected by exercise of any intensity. These experiments revealed that rainbow trout do not modulate lipolysis during exercise. Furthermore, I calculated that baseline lipolytic rate was much higher in trout than in mammals and that this rate is in constant excess of the requirements of energy metabolism. My second investigation focused on measuring fatty acid mobilization in Atlantic salmon. To date, the majority of studies on energy metabolism in salmonids have used rainbow trout as the ubiquitous model for salmonids. I postulated that domesticated rainbow trout may be far less impressive athletes than their wild anadromous form and other salmonids. In this regard, I proposed that studying energy metabolism in Atlantic salmon (even those from aquaculture) may help to deepen our understanding of the physiology of true long-distance migrant fish. To study the effects of prolonged endurance exercise on the mobilization of fatty acids from endogenous stores in these fish, I monitored the rate of appearance of fatty acids (Ra NEFA calculated from Ra Palmitate) in the blood during 72 hours of sustained swimming. I found that contrary to what has been previously described in rainbow trout, Ra Palmitate (and by proxy, Ra NEFA) is reduced by approximately 64% (from 0.75 ± 0.12 µmol kg-1min-1 to 0.27 ± 0.06 µmol kg-1min-1 and from 19.3 ± 7.8 µmol kg-1min-1 to 6.9 ± 2.0 µmol kg-1min-1 for Ra Palmitate and Ra NEFA, respectively) during prolonged endurance exercise in Atlantic salmon. However, like in trout, even this reduced rate of fatty acid mobilization exceeds the requirements of energy metabolism at rest and during swimming. While further experiments will be necessary, I speculated that this reduction in Ra NEFA may be caused by a partial inhibition of lipolysis to reduce the energetic cost of TAG:FA cycling and optimize fuel budgets during prolonged endurance exercise. This thesis provides the first in vivo measurements of lipolysis during graded exercise in salmonids and the first in vivo measurements of fatty acid mobilization in Atlantic salmon. From the results mentioned above, I concluded that salmonids mobilize lipids in constant excess of the requirements for energy metabolism, possibly to allow for rapid reorganization of membrane phospholipids in response to changing environmental conditions. However, more anadromous and migratory phenotypes may rely on a tighter control of lipolysis to minimize the costs of substrate cycling and conserve energy on limited fuel stores.
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4

Crooks, Lucy Elizabeth. "Organic contaminants in salmonid spawning grounds : occurrences and effects on the early life stages of salmonids". Thesis, University of Portsmouth, 2011. https://researchportal.port.ac.uk/portal/en/theses/organic-contaminants-in-salmonid-spawning-grounds(1b72081d-8873-4f43-a6a6-7388458ec67a).html.

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Abstract (sommario):
The factors regulating salmonid populations remain poorly understood, although contamination of the freshwater environment has been implicated as a causative factor. Depletion of stocks has become an increasing concern and it is believed that the early life stages are potentially the most vulnerable. Reduction in salmonid stocks has been reportedly linked to water quality and this current study has shown that freshwater pollution can affect the survival and development of salmonids. Environmental concentrations measured in this study varied greatly and high levels of sediment-bound contaminants were found, especially polycyclic aromatic hydrocarbons. Concentrations of waterborne contaminants were similar to levels previously measured, with some high level peaks in triazine metabolites. Field studies, as previous literature has suggested, found a higher mortality in river sites of greater sediment and nutrient loading and in sites with a greater proportion of fine sediment (<63μm). The River Avon was found to have a higher concentration of fine sediment and mortality of implanted eggs in this site was significantly higher than in the Rivers Wylye and Nadder. Although mortality of eggs implanted in river field sites was generally high, few morphometrics and biochemical effects were observed. Laboratory studies examined the toxicity of environmentally relevant levels of water-borne and sediment-bound contaminants on the brown trout (Salmo trutta) but found few acute effects and no specific trends were observed. The results did reveal a higher frequency of yolk sac oedemas for contaminant-exposed alevins in the laboratory trials compared to the control groups. In general survival was high for both the eyed egg and alevin stages when exposed to the water-borne contaminants. However, survival was greatly reduced when the water-borne contaminant exposures were carried out from the fertilisation stage compared to the eyed stage. Generally, sedimentbound contaminants had a greater effect on survival at the egg stage and mortalities were found to be reduced at the fry stage. Additionally, the results from the comet assays revealed that exposure to sediment-bound organochlorine pesticides and polycyclic aromatic hydrocarbons did induce significant acute effects in the form of DNA damage when compared to the control. Such results could indicate that certain pollutants may be problematic for the species at later stages of their development and on into adulthood. In general the findings of this research proved largely inconclusive in terms of specific impacts of contaminants on the early developmental stages of Atlantic salmon and brown trout. The results of these studies did show that the presence of common pollutants within the freshwater environment can have impacts on the survival and development of salmonids. These impacts may have serious implications throughout the lifecycle and could impact heavily on recruitment and survival at both the juvenile and adult life stages, potentially leading to a reduction of wild populations.
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Lahti, Katriina. "Integrated analysis of aggression in salmonids". Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/lahti/.

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Höjesjö, Johan. "Behavioural tactics and domestication effects in salmonids /". Göteborg : Département de zoologie, Université de Göteborg, 2002. http://catalogue.bnf.fr/ark:/12148/cb399304702.

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7

Benfey, Tillmann J. "The reproductive physiology of triploid Pacific salmonids". Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/28621.

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Abstract (sommario):
Triploidy was induced in rainbow trout, Salmo gairdneri Richardson, by heat shock (10 min at 26, 28 or 30°C, applied 1 min after fertilization at 10°C) and in pink salmon, Oncorhynchus gorbuscha Walbaum, and coho salmon, 0. kisutch Walb., by hydrostatic pressure shock (1, 2, 3 or 4 min at 69,000 kPa, applied 15 min after fertilization at 10.5°C). Triploid individuals were identified by the flow cytometric measurement of DNA content of erythrocytes stained with propidium iodide. Gonadosomatic index was reduced to a much greater extent in triploid females than males. Triploid ovaries remained very small, and contained virtually no oocytes. Triploid testes became quite large, but few cells developed beyond the spermatocyte stage. Triploid male rainbow trout had significantly lower spermatocrits than diploids, and their spermatozoa were aneuploid. Growth rates were the same for diploid and triploid rainbow trout, but triploid female pink salmon were smaller than maturing diploid females and diploid and triploid males of the same age. Triploid males of both species developed typical secondary sexual characteristics and had normal endocrine profiles for plasma sex steroids and plasma and pituitary gonadotropin, but their cycle was delayed by about one month. Triploid females developed no secondary sexual characteristics and showed no endocrine signs of maturation, even at the level of the pituitary. Vitellogenin synthesis was induced in immature diploid and triploid coho salmon by the weekly injection of 17β-estradiol. Plasma vitellogenin and pituitary gonadotropin levels were significantly elevated over levels of sham-injected fish, whereas plasma gonadotropin levels were slightly depressed. There was no significant difference between diploids and triploids for any of these results, indicating that normal vitellogenesis is not impaired by triploidy per se. It is concluded that triploids of both sexes are genetically sterile, but that only triploid females do not undergo physiological maturation. Triploid testes develop sufficiently for their steroidogenic cells to become active, which is not the case for triploid ovaries. The occasional cells that pass through the normal meiotic block develop to full maturity in triploid males but not in triploid females, probably due to the absence of the appropriate stimulus to initiate and maintain vitellogenesis. Although triploids of both sexes should make valuable tools for basic research on reproductive physiology, only the females will be useful for practical fish culture to avoid the economically detrimental effects of maturation in fish destined for human consumption.
Science, Faculty of
Zoology, Department of
Graduate
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8

Marsden, Matthew J. "In vitro correlates of disease resistance in salmonids". Thesis, University of Aberdeen, 1993. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU603177.

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Abstract (sommario):
A variety of nonspecific humoral and cellular immune-parameters were investigated in several families of farmed Atlantic salmon, Salmo salar, known to exhibit differential susceptibilities to Aeromonas salmonicida (furunculosis) in the field (fishfarm) situation. Nonspecific phagocyte functions, respiratory burst activity and leucocyte migration, were not found to be selected for in resistant families. However, nonspecific humoral factors, complement, a2-macroglobulin (aa2m) and non-a2m-antiprotease activity were found to be selected for, with resistant families possessing higher activities during challenge situations. Thus, both complement and antiprotease activity (particularly a2-macroglobulin) are regarded as potential resistance markers against furunculosis. The manner in which these factors affect the disease course of furunculosis are discussed. Antigen specific cytokine assays were developed in response to A. salmonicida antigens following vaccination against this pathogen. Antigen specific proliferation and macrophage- activating factor (MAF) production were demonstrated against A. salmonicida antigens. The potential ability to screen for differential antigen specific responsiveness as a way to assess one facet of the contributions of vaccine design and selective breeding to disease resistance were investigated. Both vaccine formulation and family origin of salmonids were found to influence in the induction and magnitude of antigen specific responses. Reasons for the observed results are discussed.
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9

Bailey, Jason. "Energy requirements and feeding behaviour of salmonids in culture /". Umeå : Dept. of Aquaculture, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/s264.pdf.

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Rennie, Shona. "Reproductive investment, gamete quality and diet in farmed salmonids". Thesis, University of Glasgow, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.418907.

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Più fonti

Libri sul tema "Salmonids"

1

Ellis, Anthony E. Vibriosis of salmonids in Scotland. Aberdeen: Department of Agriculture and Fisheries for Scotland, Marine Laboratory, 1989.

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2

Rieman, Bruce E. Consideration of extinction risks for salmonids. Eureka, CA]: USDA Forest Service, 1993.

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3

Amin, A. B. Histology atlas, normal structure of salmonids. Bodø, Norway: Akvapatologisk Laboratorium AS, 1992.

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4

Ocean ecology of North Pacific salmonids. Seattle: Washington Sea Grant Program, 1992.

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5

Noakes, David L. G. Ecological interactions between wild and hatchery salmonids. Dordrecht, The Netherlands: Springer, 2012.

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6

Bartholomew, J. L. Ceratomyxa shasta, a myxosporean parasite of salmonids. Kearneysville, W. Va: U.S. Fish and Wildlife Service, National Fisheries Research Center, 1989.

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7

Bartholomew, J. L. Ceratomyxa shasta, a myxosporean parasite of salmonids. Kearneysville, W. Va: U.S. Fish and Wildlife Service, National Fisheries Research Center, 1988.

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8

Yeakley, J. Alan, Kathleen G. Maas-Hebner e Robert M. Hughes, a cura di. Wild Salmonids in the Urbanizing Pacific Northwest. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4614-8818-7.

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9

Wild salmonids in the urbanizing Pacific Northwest. New York: Springer, 2014.

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Konkel, Gregory W. Trends in spawning populations of Pacific anadromous salmonids. Washington, D.C: U.S. Dept. of the Interior, Fish and Wildlife Service, 1987.

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Capitoli di libri sul tema "Salmonids"

1

Purser, John, e Nigel Forteath. "Salmonids". In Aquaculture, 313–37. West Sussex, UK: Blackwell Publishing Ltd., 2013. http://dx.doi.org/10.1002/9781118687932.ch15.

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Boeuf, Gilles. "Seawater adaptation strategies in salmonids". In Aquaculture: Fundamental and Applied Research, 61–80. Washington, D. C.: American Geophysical Union, 1993. http://dx.doi.org/10.1029/ce043p0061.

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Langdon, Jeremy S. "Smoltification Physiology in the Culture of Salmonids". In Recent Advances in Aquaculture, 79–118. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4684-8736-7_3.

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4

Donaldson, Edward M., Robert H. Devlin, Igor I. Solar e Francesc Piferrer. "The Reproductive Containment of Genetically Altered Salmonids". In Genetic Conservation of Salmonid Fishes, 113–29. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2866-1_8.

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5

Wenne, Roman, Agata Drywa, Matthew Kent, Kristil Kindem Sundsaasen e Sigbjørn Lien. "SNP Arrays for Species Identification in Salmonids". In Methods in Molecular Biology, 97–111. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-3774-5_6.

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Ueda, Hiroshi, Munetaka Shimizu, Hideaki Kudo, Akihiko Hara, Kenzo Kurihara e Kohei Yamauchi. "Olfactory Imprinting and Homing Mechanisms in Salmonids". In Olfaction and Taste XI, 758. Tokyo: Springer Japan, 1994. http://dx.doi.org/10.1007/978-4-431-68355-1_308.

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Hara, Toshiaki J., e Chunbo Zhang. "Spatial Coding of Odor Information in Salmonids". In Olfaction and Taste XI, 760. Tokyo: Springer Japan, 1994. http://dx.doi.org/10.1007/978-4-431-68355-1_310.

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Stabell, Ole B. "Olfactory control of homing behaviour in salmonids". In Fish Chemoreception, 249–70. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2332-7_12.

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Riley, William, e Mike Pawson. "Habitat Requirements for Juvenile Salmonids in Chalk Streams: How will Management Best Address Conflicting Interests?" In Salmonid Fisheries, 242–62. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444323337.ch12.

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Kemp, Paul. "In-Channel Placement of Structure to Enhance Habitat Complexity and Connectivity for Stream-Dwelling Salmonids". In Salmonid Fisheries, 55–80. Oxford, UK: Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444323337.ch3.

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Atti di convegni sul tema "Salmonids"

1

Quilichini, Yann, Josephine Foata, Antoine Orsini, Sylvia Agostini, Bernard Marchand e Joseph Mattei. "Statistical Analysis of the Parasites Distribution in Corsican Salmonids". In 2006 First International Symposium on Environment Identities and Mediterranean Area. IEEE, 2006. http://dx.doi.org/10.1109/iseima.2006.344961.

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2

Pritchard, Victoria. "Using genomic data to guide the conservation and management of migratory salmonids." In 5th European Congress of Conservation Biology. Jyväskylä: Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/107620.

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Booth, Derek B., Jenna G. Scholz, Timothy J. Beechie e Stephen C. Ralph. "INTEGRATING RESTORATION APPROACHES TO IMPROVE RECOVERY OF ENDANGERED SALMONIDS IN THE PACIFIC NORTHWEST, USA". In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-278809.

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Calamnius, Linda. "Seal Exclusion Device in a pontoon trap for salmonids affects the size and numbers of caught fish". In 5th European Congress of Conservation Biology. Jyväskylä: Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/108196.

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5

Pert, C. C., B. Rabe, J. Dunn, N. K. G. Salama e C. M. Collins. "Developing a method to investigate infestation pressure from sea lice on migratory salmonids utilising towed & static sentinel cages". In OCEANS 2017 - Aberdeen. IEEE, 2017. http://dx.doi.org/10.1109/oceanse.2017.8084850.

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Koljonen, Saija, e Jukka Jormola. "Recovering and restoring deleted salmonid populations". In 5th European Congress of Conservation Biology. Jyväskylä: Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/107242.

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Cisternas, Jaime, e Adolfo Moreno. "Modeling the Transmission of Piscirickettsia salmonis in Farmed Salmon". In NONEQUILIBRIUM STATISTICAL MECHANICS AND NONLINEAR PHYSICS: XV Conference on Nonequilibrium Statistical Mechanics and Nonlinear Physics. AIP, 2007. http://dx.doi.org/10.1063/1.2746742.

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Brody, M. "Transfer of knowledge within the Lake Ontario salmonid sport fishery". In OCEANS '85 - Ocean Engineering and the Environment. IEEE, 1985. http://dx.doi.org/10.1109/oceans.1985.1160304.

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May, Christopher W. "Salmonid Habitat in Urban Streams of the Puget Sound Lowlands". In Wetlands Engineering and River Restoration Conference 1998. Reston, VA: American Society of Civil Engineers, 1998. http://dx.doi.org/10.1061/40382(1998)67.

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Cao, Yanran, Stene Anne, Lars Christian Gansel, Stig Atle Tuene, Grete Hansen Aas e Anne Synnove Rosvik. "Natural infection induced immune response against salmonid alphavirus in farmed salmon". In OCEANS 2017 - Aberdeen. IEEE, 2017. http://dx.doi.org/10.1109/oceanse.2017.8084664.

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Rapporti di organizzazioni sul tema "Salmonids"

1

Smith, Eugene M. Outplanting Anadromous Salmonids, A Lilterature Study. Office of Scientific and Technical Information (OSTI), ottobre 1985. http://dx.doi.org/10.2172/5080070.

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2

Hockersmith, Eric E., e Richard S. Brown. Comparative Performance of Acoustic-tagged and PIT-tagged Juvenile Salmonids. Office of Scientific and Technical Information (OSTI), febbraio 2008. http://dx.doi.org/10.2172/1022437.

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3

Thurow, Russell F. Underwater methods for study of salmonids in the Intermountain West. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Research Station, 1994. http://dx.doi.org/10.2737/int-gtr-307.

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Becker, C. D. Anadromous salmonids of the Hanford Reach, Columbia River: 1984 status. Office of Scientific and Technical Information (OSTI), settembre 1985. http://dx.doi.org/10.2172/5222130.

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5

Larsen, Donald A., Brian R. Beckman e Walton W. Dickhoff. Physiological Assessment of Wild and Hatchery Juvenile Salmonids : Final Report, 2003. Office of Scientific and Technical Information (OSTI), agosto 2003. http://dx.doi.org/10.2172/827647.

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Maule, Alec G., John W. Beeman, Karen M. Hans, M. G. Mesa, P. Haner e J. J. Warren. Gas Bubble Disease Monitoring and Research of Juvenile Salmonids : Annual Report 1996. Office of Scientific and Technical Information (OSTI), ottobre 1997. http://dx.doi.org/10.2172/650232.

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Meyer, Kevin A., e Jr ,. James A. Lamansky. Assessment of Native Salmonids Above Hells Canyon Dam, Idaho, 2003-2004 Annual Report. Office of Scientific and Technical Information (OSTI), agosto 2004. http://dx.doi.org/10.2172/903194.

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8

Roby, Daniel D., David P. Craig, Ken Collis e Stephanie L. Adamany. Avian Predation on Juvenile Salmonids in the Lower Columbia River: 1997 Annual Report. Office of Scientific and Technical Information (OSTI), settembre 1998. http://dx.doi.org/10.2172/5661568.

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9

Collis, Ken, Stephanie Adamany, Daniel D. Roby, David P. Craig e Donald E. Lyons. Avian Predation on Juvenile Salmonids in the Lower Columbia River: 1998 Annual Report. Office of Scientific and Technical Information (OSTI), aprile 2000. http://dx.doi.org/10.2172/756492.

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10

Meyer, Kevin A. Assessment of native salmonids above Hells Canyon Dam, Idaho; 1998 annual progress report. Office of Scientific and Technical Information (OSTI), marzo 1999. http://dx.doi.org/10.2172/756723.

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