Download or read book Growth and Energetic Condition of Dolly Varden Char in Coastal Arctic Waters written by Jason T Stolarski and published by . This book was released on 2013 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dolly Varden char Salvelinus malma are a dominant member of the nearshore Arctic icthyofauna and support one of the largest subsistence fisheries within Arctic coastal communities in Alaska. Despite this importance, numerous aspects of Dolly Varden ecology remain poorly understood, which inhibits efforts to assess the biological consequences of anthropogenic disturbances such as hydrocarbon extraction and climate change within nearshore areas. The goal of this research was to develop and apply new techniques to measure and assess the biological integrity of Dolly Varden populations. To do so, I evaluated the precision of age determination generated from scales, otoliths, and fin rays, developed and validated bioelectrical impedance analysis (BIA) models capable of predicting non-lethal estimates of Dolly Varden proximate content, calculated and correlated retrospective estimates of Dolly Varden growth from archived otolith samples to broad-scale environmental variables, and investigated trends in whole body and tissue proximate content among years and demographics (i.e. reproductive versus non-reproductive individuals). Dolly Varden age determinations can be produced non-lethally using scales for fish up to age 5, while otoliths should be used for fish age 6 and greater. Multi-surface BIA models produced estimates of whole body proximate content with high precision. Retrospective growth analyses indicated growth increased significantly during the early 1980s, and was positively correlated to air temperature, sea surface temperature, and discharge and negatively correlated to ice concentration. Analyses of proximate content suggested that non-reproductive fish contained greater lipid concentrations than reproductive fish. Growth and condition analyses suggest that these metrics vary among years and are a function of reproductive cycles and environmental variability operating at multiple temporal and spatial scales. The adoption of scale-based aging and BIA technology will increase the precision of age-based biological statistics and aid in the detection of change within future Dolly Varden research and monitoring.
Download or read book Outer Continental Shelf Environmental Assessment Program Final Reports of Principal Investigators written by and published by . This book was released on 1990 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liberty Development and Production Plan written by and published by . This book was released on 2002 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liberty Development and Production Plan written by United States. Minerals Management Service. Alaska OCS Region and published by . This book was released on 2002 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Overwintering Site Temperature on Energy Allocation and Life History Characteristics of Anadromous Female Dolly Varden Char Salvelinus Malma from Northwestern Canada written by Stephen J. Sandstrom and published by . This book was released on 1995 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Overwintering sites used by Dolly Varden char (Salvelinus malma)(Walbaum) populations on the Yukon and Northwest Territories north slope are situated near thermal freshwater springs. These springs vary with respect to physicochemical characteristics (e.g., orifice water temperatures) which presumably place different environmentally driven energetic demands upon the fish. This study examined the possible effect of water temperature differences on energy allocation to competing life history demands of growth, reproduction and metabolism for adult female char from the Babbage and Big Fish Rivers (orifice water temperature is 4oC and 16oC respectively). Specifically, the study examined whether higher overwintering site water temperature increase the overwintering metabolic demands of adult female char, thereby compromising growth and/or reproductive effort. Results indicated that prior to overwintering, post-spawned females from the two systems had similar muscle lipid reserves, whereas gut lipid reserves were only slightly higher in females from the Big Fish River. This similarity in somatic energy reserves suggests that, despite the physicochemical differences in the springs, adult char of both systems overwinter in similar thermal regimes. This may be due to the formation of ice tunnels within the aufeis field unique to the Big Fish River. Energy allocated to growth in length was not significantly different between stocks, however, Big Fish River females had significantly greater adjusted mean dressed weights (muscle mass) than Babbage River females. Big Fish River femaleS allocated more energy to reproduction (gonad weight), when controlling for length but not when controlling for dressed weight. Additional muscle mass in Big Fish River females may permit production of larger gonads either by providing greater somatic energy supply available for gonad production and/or by creating larger body cavities for gonads to occupy... The higher water temperature (measured at the orifice) in the Big Fish River system does not appear to increase the metabolic demand of overwintering adult fish; consequently, growth and/or reproductive effort of females in this population are not constrained. However, the higher overwintering site temperature appears to lower the current reproductive potential of female char by requiring them to produce larger, and therefore fewer eggs.
Download or read book Fish Ecology in Arctic North America written by James Blair Reynolds and published by . This book was released on 1997 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Review written by and published by . This book was released on 1994 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Ichthyology written by and published by . This book was released on 1989 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arctic Research of the United States written by and published by . This book was released on 1997 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fishery Data Series written by and published by . This book was released on 1996 with total page 716 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Fishes of Arctic Canada written by Brian W. Coad and published by University of Toronto Press. This book was released on 2018-01-01 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marine Fishes of Arctic Canada is an accessible and up-to-date study on the diverse marine fish population existing in Canadian waters.
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2010-04 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alaska Outer Continental Shelf Beaufort Sea and Chukchi Sea Planning Areas Oil and Gas Lease Sales 209 212 217 and 221 written by and published by . This book was released on 2009 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chukchi Sea Planning Area Oil and Gas Sale 193 and the Seismic Surveying Activities in the Chukchi Sea written by and published by . This book was released on 2007 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1973 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Invertebrates and Fish Telemetry written by Jean Paul Lagardere and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a selection of the most significant papers presented at the Second Conference on Fish Telemetry in Europe in La Rochelle, France, in April 1997. The conference was attended by 100 scientists from 18 countries. The contributions are grouped under the following headings: Methodology and New Developments, Tagging Procedures, Behavioural and Physiological Ecology, Fish Migration, Stock Management and Conservation. Particular emphasis was put on tag miniaturisation, multiple functions and sampling strategies. Papers concerned the effects of tags on fish for consolidating behavioural or original physiological investigations noticeably more open to the marine environment. Methods were essentially applied to study the relationships between fish and their natural environment. Besides providing up-to-date information on the state of fish telemetry, the book illustrates the increase in spatial and temporal scales and the number of tracked fish which gives a statistical basis for field study in behavioural ecology.
Download or read book Federal Register written by and published by . This book was released on 2013-02 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
