14,618 research outputs found
fish and fishery products microbiology bacteria causing fish spoilage
No full textThis material describe bacteria which causing spoilage in fish and seafood products
Identification and distribution of fish and shellfish in Tillamook Bay, Oregon: annual report, February 1, 1974 to June 30, 1974
No full textBrent O. Forsberg, Fish Commission of Oregon, in cooperation with Bureau of Sportfisheries and Wildlife, Fish and Wildlife Service, U.S. Department of Interior.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Electronic reproduction. Salem, Or. : State Library of Oregon, 2021 Electronic reproduction from print version OrMode of access: Internet from the Oregon Government Publications Collection.Text in English
Mid Cretaceous fossil forests of Alexander Island, Antarctica
No full textSpectacular fossil trees and shrubs are preserved within fossil soils in their original growth positions in mid Cretaceous rocks on Alexander Island, Antarctic Peninsula. These fossils indicate that diverse forest communities grew upon the floodplain areas of Alexander Island during the
Albian at a palaeolatitude of 69-75 ° S. The fossil forests are preserved within the fluvial sediments of the Triton Point Formation of the Fossil Bluff Group, which represents the infill of a fore-arc basin.
The fluvial environment matured from a braided river system, with frequent floods and unstable channel banks, to a more mature meandering river system with more stable floodplain areas. Low energy floods preserved plants that grew on the river channel banks in fine muds and silts. Catastrophic floods occurred rarely, possibly as a result of volcanic activity upon the magmatic arc 200 km away. These high-energy floods covered floodplain areas in coarse sands, entombing trees. Well-drained mollisols formed on emergent surfaces becoming rich and fertile and supporting diverse forest communities.
The flora within the forests occurred as well structured communities that occupied different parts of the river floodplain. Open-woodland forests dominated by araucarian conifers, ferns and shrubs, occupied stable areas of the floodplain characterised by low-energy floods. Disturbance
vegetation dominated by Taeniopteris, liverworts, angiosperms and ferns, occupied river channel banks where frequent floods provided fresh surfaces for these early colonising plants to flourish. Patch forest communities dominated by podocarp conifers, ginkgo trees, cycadophytes and ferns, grew on stable areas of the floodplain distal to the river channel. These mature climax forests were rarely disturbed by catastrophic floods.
Evidence from the palaeosols, sediments and fossil wood of Alexander Island suggest that the climate was warm, temperate, and semi-arid with seasonal precipitation and intermittent wet phases. In structure and composition the Alexander Island forest are very similar to the warm temperate rainforests of New Zealand which experience mean summer temperatures of 16-22 °C and mean winter temperatures of 3-8 ° C. This study and other palaeobotanical data suggests that the Alexander Island forests are likely to have grown under similar temperatures
Texas Game and Fish, Volume 22i
No full textIndex to the Texas Game and Fish magazine listing articles by title, subject, and author
Texas Game and Fish, Volume 20i
No full textIndex to the Texas Game and Fish magazine listing articles by title, subject, and author
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The development and testing of techniques for studying the behavior of juvenile salmonids in reservoirs
No full text"The Oregon Fish Commission received a contract from the U. S. Fish and Wildlife Service, Bureau of Commercial Fisheries, under the Saltonstall-Kennedy Act for a study to develop methods for determining the behavior of juvenile salmonids in reservoirs. The study, consisting of a literature survey and field program, was conducted in Felton and North Fork Reservoirs on the Deschutes and Clackamas Rivers, Oregon, between September 30, 1959 and January 31, 1962. Pelton Reservoir contains chinook salmon (Oncorhynchus tshawytscha), blueback salmon (0. nerka), and summer-run steelhead trout (Salmo airdneri); North Fork Reservoir contains chinook salmon, silver salmon (0. kisutch 1 and winter-run steelhead trout. Equipment tested included SCUBA (self-contained underwater breathing apparatus) for direct observation, gill nets for capture, and sonar for indirect observation of fish." (Abstract From Author
Pink Salmon an Alexander Creek
No full textDavid Warnberg with a nice pink salmon caught in Alexander Creek, Alaska. The pink is also known as the Humpy. You can see where this salmon gets the nickname when you look at this large male specimen. The pink is an aggressive fish and is known for it'
Diversity, distribution and community composition of fish in perialpine lakes
No full textProjet Lac was a large project conducted by Eawag and the University of Bern to quantitatively survey, for the first time, whole-lake fish communities in the large and deep lakes in and around the European Alps using multiple, standardised sampling methods. Starting in 2010, in total 35 lakes were investigated across Switzerland, Italy, France, Germany and Austria, with more than 106 fish species recorded. This report brings together key findings, compares fish communities among lakes, investigates their relationship to environmental parameters, and provides an overview of drivers of biodiversity and community structure in this important ecosystem
Fish research project, Oregon
No full textprepared by: James R. Ruzycki, Lance R. Clarke, Michael W. Flesher, Richard W. Carmichael, Debra L. Eddy.Title from PDF title page (viewed on February 16, 2023)."Lower Snake River Compensation Plan: Oregon evaluation studies"--Cover.This archived document is maintained by the State Library of Oregon as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Includes bibliographical references (pages 23-24).Financed by the U.S. Fish and Wildlife Service under the Lower Snake River Compensation Plan.Mode of access: Internet from the Oregon Government Publications Collection.Text in English
Can fish really feel pain?
No full textWe review studies claiming that fish feel pain and find deficiencies in the methods used for pain identification, particularly for distinguishing unconscious detection of injurious stimuli (nociception) from conscious pain. Results were also frequently misinterpreted and not replicable, so claims that fish feel pain remain unsubstantiated. Comparable problems exist in studies of invertebrates. In contrast, an extensive literature involving surgeries with fishes shows normal feeding and activity immediately or soon after surgery. C fiber nociceptors, the most prevalent type in mammals and responsible for excruciating pain in humans, are rare in teleosts and absent in elasmobranchs studied to date. A-delta nociceptors, not yet found in elasmobranchs, but relatively common in teleosts, likely serve rapid, less noxious injury signaling, triggering escape and avoidance responses. Clearly, fishes have survived well without the full range of nociception typical of humans or other mammals, a circumstance according well with the absence of the specialized cortical regions necessary for pain in humans. We evaluate recent claims for consciousness in fishes, but find these claims lack adequate supporting evidence, neurological feasibility, or the likelihood that consciousness would be adaptive. Even if fishes were conscious, it is unwarranted to assume that they possess a human-like capacity for pain. Overall, the behavioral and neurobiological evidence reviewed shows fish responses to nociceptive stimuli are limited and fishes are unlikely to experience pain
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