Download or read book Imprinting Salmon and Steelhead Trout for Homing 1981 written by National Marine Fisheries Service and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1981 Annual Report of Research written by and published by . This book was released on 1982 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service, under contract to the Bonneville Power Administration, began conducting research on imprinting Pacific salmon and steelhead for homing in 1978. The juvenile marking phase was completed in 1980; over 4 million juvenile salmon and steelhead were marked and released in 23 experiments. The primary objectives were to determine: (1) a triggering mechanism to activate the homing imprint, (2) if a single imprint or a sequential imprint is necessary to assure homing, and (3) the relationship between the physiological condition of fish and their ability to imprint. Research in 1981 concentrated on: (1) recovering returning adults from previous experiments, (2) analyzing completed 1978 steelhead and 1980 coho salmon experiments, and (3) preliminary analyzing 1979 and 1980 fall chinook salmon experiments. Seven experimental groups are discussed: four steelhead, two fall chinook salmon, and one coho salmon. In four groups, survival was enhanced by the imprinting-transportation procedures. Homing back to the hatchery area was successful in two groups, and generally, unless there were extenuating circumstances (eruption of Mount St. Helens, disease problem, etc.), greater returns to user groups were evident.

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1981 written by and published by . This book was released on 1982 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1983 written by Emil Slatnick and published by . This book was released on 1984 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1980 Annual Report of Research written by and published by . This book was released on 1981 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service (NMFS), under contract to the Bonneville Power Administration (BPA), is conducting research on imprinting Pacific salmon and steelhead for homing. Imprinting is defined as a rapid and irreversible learning experience that provides fish with the ability to return to natal streams or a preselected site. The ability to activate the imprint mechanism at the proper time should assure a suitable homing cue that coupled with transportation (Park et al. 1979) will result in high smolt survival and ensure adequate returns to the homing site or hatchery. In our study, we use single imprints and sequential imprints. Single imprinting is cueing fish to a unique, single water supply prior to release. Various mechanical stimuli may be used in combination with the unique water source to achieve the single imprint. Sequential imprinting is cueing fish to two or more water sources in a step-by-step process to establish a series of signposts for the route ''home''. The primary objectives of our homing research are as follows: (1) Determine a triggering mechanism to activate the homing imprint in salmonids. (2) Determine whether a single imprint or a series of stimuli (sequential imprinting) are necessary to assure homing for various stocks of salmonids. (3) Determine the relationship between the physiological condition of fish (gill Na+-K+ ATPase activity, etc.) and their ability to imprint. Our study began in 1978, and the first 2 years activities were reported by Slatick et al. (1979, 1980) and Novotny and Zaugg (1979). This report covers the research for the third year (1980). Specific activities of the third year's research were divided into three categories: (1) mark and release additional groups of juvenile salmonids to test imprinting techniques, (2) determine health profiles and monitor smoltification status of juvenile test fish, and (3) monitor and evaluate adult returns from juveniles marked and released in 1978 and 1979 to determine the efficiency of the imprinting techniques.

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1982 Annual Report of Research written by and published by . This book was released on 1983 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service, under contract to the Bonneville Power Administration, began conducting research on imprinting Pacific salmon and steelhead for homing in 1978. The juvenile marking phase was completed in 1980; over 4 million juvenile salmon and steelhead were marked and released in 23 experiments. The primary objectives were to determine; (1) a triggering mechanism to activate the homing imprint, (2) if a single imprint or a sequential imprint is necessary to assure homing, and (3) the relationship between the physiological condition of fish and their ability to imprint. Research in 1982 concentrated on: (1) recovering returning adults from previous experiments, (2) analyzing completed 1979 steelhead and chinook salmon experiments, and (3) preliminarily analyzing 1980 fall chinook salmon experiments. Six experimental groups are discussed: two steelhead, two spring chinook salmon, and two fall chinook salmon. In four test groups, survival was enhanced by the imprinting-transportation procedures. Homing back to the hatchery area was partly successful in two test groups, and generally, unless there were extenuating circumstances (eruption of Mount St. Helens, disease problem, etc.), greater returns to user groups were evident.

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1983 Annual Report of Research written by and published by . This book was released on 1984 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service (NMFS), under contract to the Bonneville Power Administration, began conducting research on imprinting Pacific salmon and steelhead for homing in 1978. In the juvenile marking phase, over 4 million juvenile salmon and steelhead were marked and released in 23 experiments. The primary objectives were to determine a triggering mechanism to activate the homing imprint, if a single imprint or a sequential imprint is necessary to assure homing, and the relationship between the physiological condition of fish and their ability to imprint. Ten experimental studies are discussed. Six of the studies employed a variety of techniques for imprinting fish. The remaining four tested the feasibility of imprinting fish by a short-distance voluntary migration before transport. In five experiments, survival was enhanced by the imprint-transportation procedures, and homing to the homing site area was partly successful. Returns from the Astoria, Oregon, release of fall chinook salmon from Big Creek Hatchery (Knappa, Oregon), for example, showed that limited short distance migration imprinting should provide 2-3 time more fish to the various fisheries while providing adequate returns to the hatchery for egg take each year. 21 refs., 12 figs, 12 tabs.

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1982 written by Emil Slatick and published by . This book was released on 1983 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1978 Annual Report of Research written by and published by . This book was released on 1979 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: During 1978, the National Marine Fisheries Service (NMFS), under contract with the Bonneville Power Administration (BPA), initiated research on imprinting salmon and steelhead trout for homing. The primary objectives of the homing research are as follows: (1) determine whether a single imprint or a series of stimuli (sequential imprinting) are necessary to assure homing for various stocks of salmonids; (2) determine a triggering mechanism to activate the homing imprint in salmonids; (3) determine the relationship between the physiological condition of fish (gill ATPase activity, etc.) and their ability to imprint. The ability to activate the imprint mechanism at the proper time should assure a suitable homing cue that, coupled with transportation, will result in high smolt survival and insure adequate return to the homing site or hatchery. For the purposes of this study, imprinting is accepted to mean a rapid and irreversible learning experience that provides fish with the ability to return to natal streams or a selected site. In our tests, we used single imprints and sequential imprints. Single imprinting means cueing fish to a unique, single water supply prior to release. Various mechanical stimuli may be used in combination with the unique water source to achieve a single imprint. Sequential imprinting means cueing fish to two or more water sources in a step-by-step process which will established a signpost for learning the route ''home''.

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1979 Annual Report of Research written by and published by . This book was released on 1980 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service (NMFS), under contract to the Bonneville Power Administration (BPA), is conducting research on imprinting Pacific salmon and steelhead for homing. Imprinting is defined as a rapid and irreversible learning experience that provides fish with the ability to return to natal streams or a preselected site. The ability to activate the imprint mechanism at the proper time should assure a suitable homing cue that coupled with transportation (Park et al. 1979) will result in high smolt survival and ensure adequate returns to the homing site or hatchery. in our study, we use single imprints and sequential imprints. Single imprinting is cueing fish to a unique, single water supply prior to release. Various mechanical stimuli may be used in combination with the unique water source to achieve the single imprint. Sequential imprinting is cueing fish to two or more water sources in a step-by-step process which establishes a series of signposts for the route ''home''. The primary objectives of our homing research are as follows: (1) Determine whether a single imprint or a series of stimuli (sequential imprinting) are necessary to assure homing for various stocks of salmonids. (2) Determine a triggering mechanism to activate the homing imprint in salmonids. (3) Determine the relationship between the physiological condition of fish (gill Na+-K+ ATPase activity, etc.) and their ability to imprint. Our study began in 1978, and the first year's activities were reported by Slatick et al. (1979) and Sovotny and Zaugg (1979). This report covers the research for the second year (1979). The specific activities of the second year's research were divided into three categories: (1) mark and release additional groups of juvenile salmonids to test imprinting techniques; (2) determine health profiles and monitor smoltification status of juvenile test fish; and (3) monitor and evaluate adult returns, from juveniles marked and released in 1978, to determine the efficacy of the imprinting techniques.

Download or read book Imprinting Hatchery Reared Salmon and Steelhead Trout for Homing Volume I of III Narrative 1978 1983 Final Report written by and published by . This book was released on 1988 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service began conducting homing research on Pacific salmon and steelhead. Over 4 million juvenile salmon and steelhead were marked and released, and 23 individual experiments were conducted. The research had the following objectives: (1) develop the techniques for imprinting homing cues while increasing survival of hatchery reared salmonids and (2) provide fishery managers with the information necessary to increase the returns of salmon and steelhead to the Columbia River system and to effectively distribute these fish to the various user groups. Our imprint methods were grouped into three general categories: (1) natural migration imprint from a hatchery of origin or an alternate homing site (by allowing fish to volitionally travel downstream through the river on their seaward journey), (2) single exposure imprinting (cueing fish to a single unique water supply with or without mechanical stimuli prior to transport and release), and (3) sequential exposure imprinting (cueing fish to two or more water sources in a step-by-step process to establish a series of signposts for the route ''home''). With variations, all three techniques were used with all salmonid groups tested: coho salmon, spring and fall chinook salmon, and steelhead. For the single and sequential imprint, fish were transported around a portion of their normal migration route before releasing them into the Columbia River.

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1980 Annual Report of Research written by and published by . This book was released on 1981 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service (NMFS), under contract to the Bonneville Power Administration (BPA), is conducting research on imprinting Pacific salmon and steelhead for homing. Imprinting is defined as a rapid and irreversible learning experience that provides fish with the ability to return to natal streams or a preselected site. The ability to activate the imprint mechanism at the proper time should assure a suitable homing cue that coupled with transportation (Park et al. 1979) will result in high smolt survival and ensure adequate returns to the homing site or hatchery. In our study, we use single imprints and sequential imprints. Single imprinting is cueing fish to a unique, single water supply prior to release. Various mechanical stimuli may be used in combination with the unique water source to achieve the single imprint. Sequential imprinting is cueing fish to two or more water sources in a step-by-step process to establish a series of signposts for the route ''home''. The primary objectives of our homing research are as follows: (1) Determine a triggering mechanism to activate the homing imprint in salmonids. (2) Determine whether a single imprint or a series of stimuli (sequential imprinting) are necessary to assure homing for various stocks of salmonids. (3) Determine the relationship between the physiological condition of fish (gill Na+-K+ ATPase activity, etc.) and their ability to imprint. Our study began in 1978, and the first 2 years activities were reported by Slatick et al. (1979, 1980) and Novotny and Zaugg (1979). This report covers the research for the third year (1980). Specific activities of the third year's research were divided into three categories: (1) mark and release additional groups of juvenile salmonids to test imprinting techniques, (2) determine health profiles and monitor smoltification status of juvenile test fish, and (3) monitor and evaluate adult returns from juveniles marked and released in 1978 and 1979 to determine the efficiency of the imprinting techniques.

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1984 with total page 1140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Salmon and Steelhead Trout for Homing 1979 Annual Report of Research written by and published by . This book was released on 1980 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service (NMFS), under contract to the Bonneville Power Administration (BPA), is conducting research on imprinting Pacific salmon and steelhead for homing. Imprinting is defined as a rapid and irreversible learning experience that provides fish with the ability to return to natal streams or a preselected site. The ability to activate the imprint mechanism at the proper time should assure a suitable homing cue that coupled with transportation (Park et al. 1979) will result in high smolt survival and ensure adequate returns to the homing site or hatchery. in our study, we use single imprints and sequential imprints. Single imprinting is cueing fish to a unique, single water supply prior to release. Various mechanical stimuli may be used in combination with the unique water source to achieve the single imprint. Sequential imprinting is cueing fish to two or more water sources in a step-by-step process which establishes a series of signposts for the route ''home''. The primary objectives of our homing research are as follows: (1) Determine whether a single imprint or a series of stimuli (sequential imprinting) are necessary to assure homing for various stocks of salmonids. (2) Determine a triggering mechanism to activate the homing imprint in salmonids. (3) Determine the relationship between the physiological condition of fish (gill Na+-K+ ATPase activity, etc.) and their ability to imprint. Our study began in 1978, and the first year's activities were reported by Slatick et al. (1979) and Sovotny and Zaugg (1979). This report covers the research for the second year (1979). The specific activities of the second year's research were divided into three categories: (1) mark and release additional groups of juvenile salmonids to test imprinting techniques; (2) determine health profiles and monitor smoltification status of juvenile test fish; and (3) monitor and evaluate adult returns, from juveniles marked and released in 1978, to determine the efficacy of the imprinting techniques.

Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Hatchery Reared Salmon and Steelhead Trout for Homing 1978 1983 Narrative written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Imprinting Hatchery Reared Salmon and Steelhead Trout for Homing 1978 1983 Data summaries written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: