oncorhynchus

Oncorhynchus rastrosus, the “sabertooth salmon”. Reaching up to 2.7m long (9ft), this enormous fanged fish lived along the Pacific coast of North America from 13 mya to sometime in the last couple million years — barely missing encountering modern humans, in geological time.

Aside from the hooked “saberteeth” at the tip of its snout, O. rastrosus had few teeth and very large gill rakers — suggesting it primarily fed on plankton, similarly to its modern relative the sockeye salmon.

[Available on Redbubble!]

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Started a new project today, I’m gonna be painting several Oncorhynchus species

Top to bottom:

Sockeye salmon, Oncorhynchus nerka

Pink salmon, Oncorhynchus gorbuscha

Chum salmon, Oncorhynchus keta

King salmon, Oncorhynchus tshawytscha

Greenback Cutthroat Trout (Oncorhynchus clarkii stomias)

… is the easternmost subspecies of cutthroat trout in North America. The greenback cutthroat, once widespread in the Arkansas and South Platte River drainages of Eastern Colorado and Southeast Wyoming, today occupies less than 1% of its historical range. It is currently listed as threatened under the Endangered Species Act. It was adopted in 1994 as the state fish of Colorado…

(read more: Wikipedia)

photograph by U.S. Fish and Wildlife Service

Chum Salmon | Oncorhynchus keta

“In BC and the Yukon, chum spawn in more than 880 medium-sized streams and rivers. In short coastal streams, chum emerge from gravel spawning beds in the spring as fry and move directly to the sea. This migration is accomplished in a day or two. In larger river systems, the young remain in fresh water for periods of up to several months before reaching the ocean. Most chum spend two or three summers at sea before returning to their home streams to spawn. In May or June of their final year at sea, maturing chum are found throughout the eastern and western Pacific, north of the California border.” -

(by Fish as art)

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Washington Department of Fish & Wildlife

We at the Washington Department of Fish and Wildlife, along with our partners at the Kalispel Tribe of Indians Natural Resources Department, are excited about the success of a seven year project to restore native westslope cutthroat trout (Oncorhynchus clarki lewisi) to Cee Cee Ah Creek, a tributary of the Pend Oreille River on the Colville National Forest in Pend Oreille County. 

In 2008-10 we removed non-native fish that out-competed the native cutthroat to the point where none were left, then re-introduced westslopes in 2011-12 that are now thriving. (Lewis & Clark, who named this fish, would be so proud!)

(source)

Postdoc: Contemporary evolution in salmonids
—047d7b339b736fce3d0511fb191e Content-Type: text/plain; charset=UTF-8 A postdoctoral position is available in the laboratory of Mark Christie at Purdue University (http://bit.ly/18U8q4q) to examine the rapid evolution of steelhead trout (*Oncorhynchus mykiss*) to the Great Lakes. Steelhead were introduced to the Great Lakes around 1890 and have self-sustaining populations where the fish continue to swim up rivers to spawn, but now forage and grow in the Great Lakes rather than the ocean environment. Whole genome resequencing will play a central role in this project, thus the ideal candidate will have a strong background in relevant laboratory work and bioinformatics. Proficiency with Unix/Linux (bash shell) command line and one or more scripting languages (Perl/Python etc.) will be highly regarded. Familiarity with R and analytical methods in population genetics will also be viewed favorably. The candidate is expected to be highly motivated and able to work both collaboratively and independently. The position is to be filled as soon as possible with August being the latest possible start date. Applicants must have a PhD. Exceptional candidates that will complete their PhD within the next few months will also be considered. Applicants should submit 1. a cover letter that describes your research interests and goals, 2. a full CV (including publications), and 3. the names and contact information for three individuals that are willing to serve as references. Please submit all application materials as a single PDF file to markchristie@purdue.edu. Funding is available for two years contingent upon a successful one-year review. Review of applications will begin April 1st and continue until the position is filled. Purdue has substantial bioinformatics resources and state-of-the-art computational facilities ideal for working with high-throughput sequencing data. West Lafayette is a typical college town located about 1 hour away from Indianapolis and two hours from Chicago. Farmers markets, local parks, and performing arts (http://bit.ly/1CTKonZ) all make for enjoyable living conditions. Purdue University is an EEO/AA employer. —047d7b339b736fce3d0511fb191e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

A postdoctoral position is available in the laboratory of Mark Christie at Purdue University (http://bit.ly/18U8q4q) to examine the rapid evolution of steelhead trout (Oncorhynchus mykiss) to the Great Lakes. Steelhead were introduced to the Great Lakes around 1890 and have self-sustaining populations where the fish continue to swim up rivers to spawn, but now forage and grow in the Great Lakes rather than the ocean environment. Whole genome resequencing will play a central role in this project, thus the ideal candidate will have a strong background in relevant laboratory work and bioinformatics. Proficiency with Unix/Linux (bash shell) command line and one or more scripting languages (Perl/Python etc.) will be highly regarded. Familiarity with R and analytical methods in population genetics will also be viewed favorably. The candidate is expected to be highly motivated and able to work both collaboratively and independently. The position is to be filled as soon as possible with August being the latest possible start date.

Applicants must have a PhD. Exceptional candidates that will complete their PhD within the next few months will also be considered. Applicants should submit 1. a cover letter that describes your research interests and goals, 2. a full CV (including publications), and 3. the names and contact information for three individuals that are willing to serve as references. Please submit all application materials as a single PDF file to markchristie@purdue.edu. Funding is available for two years contingent upon a successful one-year review. Review of applications will begin April 1st and continue until the position is filled.

Purdue has substantial bioinformatics resources and state-of-the-art computational facilities ideal for working with high-throughput sequencing data. West Lafayette is a typical college town located about 1 hour away from Indianapolis and two hours from Chicago. Farmers markets, local parks, and performing arts (http://bit.ly/1CTKonZ) all make for enjoyable living conditions. Purdue University is an EEO/AA employer.

—047d7b339b736fce3d0511fb191

via Gmail

Spring is just around the corner, which means beautiful rainbow trout (Oncorhynchus mykiss) like this will soon be spawning in freshwater streams and rivers across Western North America. Rainbow trout prefer to spawn in the same stream in which they were hatched. Rainbows are not true trout, but actually Salmonids.

photograph: Roger Tabor, USFWS

(via: USFWS_Pacific Region)

Micro#RNA expression profiles from eggs of different qualities associated with post-ovulatory ageing in rainbow trout (Oncorhynchus mykiss)

Background: Egg quality is an important aspect in rainbow trout farming. Post-ovulatory aging is one of the most important factors affecting egg quality. Micro#RNAs (#miRNAs) are the major regulators in various biological processes and their expression profiles could serve as reliable biomarkers for various pathological and physiological conditions. The objective of this study was to identify #miRNAs that are associated with egg qualities in rainbow trout using post-ovulatory aged eggs. Results: Egg samples from females on day 1, day 7, and day 14 post-ovulation (D1PO, D7PO and D14PO), which had the fertilization rates of 91.8%, 73.4% and less than 50%, respectively, were collected and small #RNAs isolated from these samples were subjected to deep sequencing using the Illumina platform. The massive sequencing produced 27,342,477, 26,910,438 and 29,185,371 reads from the libraries of D1PO, D7PO and D14PO eggs, respectively. A three-way comparison of the #miRNAs indicated that the egg samples shared 392 known and 236 novel #miRNAs, and a total of 414, 481, and 470 known and 243, 298, and 296 novel #miRNAs were identified from D1PO, D7PO and D14PO eggs, respectively. Four known #miRNAs (omy-miR-193b-3p, omy-miR-203c-3p, omy-miR-499-5p and omy-miR-7550-3p) and two novel #miRNAs (omy-miR-nov-95-5p and omy-miR-nov-112-5p) showed significantly higher expression in D1PO eggs relative to D14PO eggs as revealed by both deep sequencing and real time quantitative PCR analysis. GO analysis of the predicted target genes of these differentially expressed #miRNAs revealed significantly enriched GO terms that are related to stress response, cell death, DNA damage, ATP generation, signal transduction and transcription regulation. Conclusions: Results indicate that post-ovulatory ageing affects #miRNA expression profiles in rainbow trout eggs, which can in turn impact egg quality. Further characterization of the differentially expressed #miRNAs and their target genes may provide valuable information on the role of these #miRNAs in controlling egg quality, and ultimately lead to the development of biomarkers for prediction of egg quality in rainbow trout. http://bit.ly/1Bwp14M #BMC

#Eagle with Salmon Standard Luncheon Napkin

Eagle with Salmon Standard Luncheon Napkin

Decorated with an amazing image of an immature American Bald Eagle (Haliaeetus leucocephalus) with a Chum Salmon (Oncorhynchus keta) that he just caught from a salmon spawning stream in Rocky Bay on the outer coast of the Kenai Peninsula. A gale was blowing and the eagle was keeping balance with its wings. By Ted Raynor

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