The population structure of chinook salmon and steelhead trout is presented as an assimilation the life history forms that have evolved in synchrony with diverse complex environments over their Pacific range. As poikilotherms, temperature described overwhelming environmental influence determines what options occur. different populations represent ecological types referred to spring-, summer-, fall, winter-run segments, well stream- ocean-type, or ocean-maturing forms. However, they are more...

We used microarray and quantitative real-time PCR (qRT-PCR) analyses in adult female zebrafish ( Danio rerio) to identify metabolic pathways regulated by starvation the liver brain. The transcriptome of whole brain showed little response 21 days starvation. Only agouti-related protein 1 agrp1) significantly responded, with increased expression brains starved fish. In contrast, a 21-day period downregulated 466 upregulated 108 transcripts liver, indicating an overall decrease activity,...

Genetic structure (six microsatellites) and gene flow were examined among anadromous (steelhead; n = 326), resident (rainbow trout; 52), mixed ( 407) Oncorhynchus mykiss life‐history forms collected from the major drainages mainstem Walla River Touchet within sub‐basin, Washington, U.S.A. was detected between two drainages. Exact tests, F ST , multi‐locus assignment tests a neighbour‐joining dendrogram revealed genetic divergence sympatric reference populations of adult steelhead rainbow...

This study evaluated the suitability of commercially produced fermented soybean meal (FSBM) known as PepSoyGen™, in a plant-based diet for Florida pompano, Trachinotus carolinus fingerlings. An 8-week growth trial was conducted to evaluate effect four isonitrogenous and isolipidic diets containing 0, 206, 309 410 g/kg FSBM, replacing approximately 0%, 50%, 75% 100% SBM (designated Basal, FSBM 50, 75 100, respectively) on performance, body composition, serum biochemistry morphological...

Redband trout (Oncorhynchus mykiss ssp.) in southeastern Oregon inhabit high‐elevation streams that exhibit extreme variability seasonal flow and diel water temperature. Given the strong influence potential limitations exerted by temperature on fish physiology, we were interested how acute change thermal history influenced physiological capabilities biochemical characteristics of these trout. To this end, studied wild redband inhabiting two with different profiles measuring (1) critical...

Macrobrachium acanthurus is a freshwater prawn with aquaculture potential. However, little known about its nutrient requirements, particularly regarding protein and lipid-carbohydrate ratio interactions in the diet. To assess effect of these macronutrients growth performance activity digestive antioxidant enzymes, 2 × 3 factorial design experiment was conducted using two different levels (P35 P40) three ratios (L:C ratio): 2:1 (20 % L 10 C), 1:2 (10 20 %) 1:6 (5 30 C). Each diet fed to...

The rapid identification and quantification of virus in diseased fish is a goal both conservationists commercial aquaculturists have struggled to attain. Recently technique for the detection viral mRNA particles that uses fluorescent tagging amplification has been developed. Utilizing primers labelled probes generated specific nucleocapsid (N) glycoprotein (G) genes infectious haematopoietic necrosis (IHNV), an instrument measures cyclic emittance fluorescence, presence or absence can be...

This study investigated diverse reproductive types in complex mating systems of steelhead Oncorhynchus mykiss . Postspawned (kelts) were sampled during attempted downstream migration over Lower Granite Dam on the Snake River, U.S.A. Multilocus microsatellite genotypes (14 loci) used to assign unknown origin, kelt individuals upstream populations origin. Results indicated that iteroparity is a life‐history trait remains several tributaries River basin despite strong selection against adult...

Since the mid-1920s, Idaho Department of Fish and Game has cultured Yellowstone cutthroat trout Oncorhynchus clarki bouvieri at Henrys Lake to offset declines in natural production for use stocking programs throughout Idaho. mid-1970s, they have also produced F1 hybrids: female × male rainbow O. mykiss. The ability fishery managers, when selecting broodstock, visually distinguish returning from hybrids is, therefore, crucial avoid accidental introduction genes into hatchery-supplemented...

DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 60:205-213 (2004) - doi:10.3354/dao060205 Real-time quantitative polymerase chain reaction (QPCR) identify Myxobolus cerebralis in rainbow trout Oncorhynchus mykiss Wade P. Cavender1, John S. Wood2, Madison Powell3, Kenneth Overturf3, D. Cain1,* 1Department Fish and Wildlife Resources Aquaculture Research Institute,...

An in vivo trial was conducted to determine the apparent digestibility coefficients (ADCs) of insect meals for rainbow trout, Oncorhynchus mykiss. Rainbow trout (approximately 370 g ± 23 g, mean SD initial weight) were stocked 25 per tank into 400-liter tanks. Fish fed a reference diet, or 1 5 test diets created by blending diet 70:30 ratio (dry-weight basis) with menhaden fish meal (MFM), 2 house cricket (Acheta domesticus) (cricket A and B), Galleria mellonella meal, yellow mealworm...

Abstract A quantitative polymerase chain reaction (QPCR) assay has been developed to detect varying levels of Renibacterium salmoninarum , the causative agent bacterial kidney disease. This allows for direct enumeration DNA or RNA copy number within tissues and body fluids. The can be applied non‐lethally used determine whether R. is transcriptionally active. presence in from 430 chinook salmon collected five Idaho Fish Game operated hatcheries was initially evaluated using widely employed...

Abstract A study was conducted to determine the benefits of intake purple corn extract ( PCE ), a natural source anthocyanins, in rainbow trout, Oncorhynchus mykiss . control or test diet supplemented with 5% fed triplicate tanks 25 fish each for 8 wk. The concentrations three cyanidin‐3‐glucoside, pelargonidin‐3‐glucoside, and peonidin‐3‐glucoside, were measured chemical composition fatty acid profiles fish, as well plasma, liver, muscle determined. total antioxidant capacity TAC )...

Abstract Introgressive hybridization has been widely reported for westslope cutthroat trout (WCT) Oncorhynchus clarkii lewisi and rainbow (RBT) O. mykiss is often a result of introductions nonnative RBT into previously allopatric populations trout. The WCT evolved in sympatry with portion its native range. Few studies have evaluated natural hybrid zone structure sympatric or the effects within populations. We used one mitochondrial DNA marker three co‐dominant nuclear markers to examine 17...

Abstract In the artificial propagation program for endangered Snake River sockeye salmon Oncorhynchus nerka, a portion of F1 progeny (produced from spawning captive parents) are retained in hatchery through maturation and spawning; remaining reintroduced to nursery lakes central Idaho at several life history stages (egg, presmolt, smolt). this study, proximate fatty acid compositions presmolt releases were analyzed both planting out-migration assess their feeding success after overwintering...

Creatine is a popular ergogenic sport supplement used to improve exercise performance and muscle growth in athletes. Further, studies suggest protective effects of creatine neurodegenerative diseases, type 2 diabetes, osteoarthritis, fibromyalgia, aging fatty liver disease humans. Similarly, the versatility creatine, as or feed additive, has been evaluated different animal production systems, including terrestrial livestock, poultry aquaculture fish species. Some observed are increased...

Abstract Populations of Yellowstone cutthroat trout Oncorhynchus clarkii bouvierii have declined throughout their native range as a result habitat fragmentation, overharvest, and introductions nonnative that hybridized with or displaced populations. The degree to which these factors impacted the current genetic population structure populations is primary interest for conservation. In this study, we examined diversity in Idaho Nevada data from six polymorphic microsatellite loci. A total...