Download or read book Modeling Consumption Rates Of Atlantic Herring Clupea Harengus written by Mitchell A. Jones and published by . This book was released on 2014 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pelagic forage fishes play critical roles in productive marine food webs by providing a link between zooplankton and piscivores and transferring energy from feeding grounds to other ecosystems. The amount of energy moved to higher trophic levels or new systems is directly linked to the consumption rate of pelagic forage fishes. In the Gulf of Maine, Atlantic herring (Clupea harengus) is the dominant forage fish; the purpose of this study is to determine their specific consumption rate (g prey/g fish/day). Using fish collected in autumn 2012 and spring 2013, we applied a mercury mass-balance model to estimate individual and population consumption of Atlantic herring in the Gulf of Maine. Our results suggest that the specific consumption rate increases from age 1.5 until age 6 (years) and then asymptotes. These estimates were contradictory to much of what exists in the literature; for most fishes, specific consumption estimates decrease with age and overall are much lower than our estimates. We looked further into our results to explore the underlying cause of the increase in specific consumption rate. We combined the mercury mass-balance model with a Wisconsin (WI) bioenergetics model and ran several simulations adjusting the most sensitive factors in each--prey mercury in the former and activity in the latter. The results of our simulations showed that an increase in activity relative to age and mass can best explain the increase in the consumption rate of Adult herring. This suggests that an ontogenetic shift to migration in adult Atlantic herring results in increased energy demand with age, and ultimately increased consumption.

Download or read book Atlantic Herring Clupea Harengus Harengus Fishery Management Plan FWP written by and published by . This book was released on 1999 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Modelling Results for the Assessment of Atlantic Herring Clupea Harengus Stocks in the Southern Gulf of St Lawrence NAFO Division 4T to 2015 written by D. P. Swain and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Norwegian Sea Ecosystem written by Hein Rune Skjoldal and published by Fagbokforlaget. This book was released on 2004 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'The Norwegian Sea Ecosystem' elucidates the interaction between the different ecological compartments of the area, with special emphasis on the most important pelagic fish stocks. It deals with mechanisms for ecosystem variability and discusses the challenge of an ecosystem approach to managing the area.

Download or read book Atlantic Herring Clupea Harengus Harengus Fishery Management Plan FWP written by and published by . This book was released on 1999 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coastal Phytoplankton written by Alexandra Kraberg and published by . This book was released on 2010 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Target Strength Variability in Atlantic Herring Clupea Harengus and Its Effect on Acoustic Abundance Estimates written by Sascha Mario Michel Fässler and published by . This book was released on 2010 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Energy Budget of the Atlantic Herring Clupea Harengus Harengus written by Michael Douglas McGurk and published by . This book was released on 1979 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Using Ecological Models to Support and Shape Environmental Policy Decisions written by Chiara Piroddi and published by Frontiers Media SA. This book was released on 2022-02-10 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Principal Predators and Consumption of Juvenile and Adult Atlantic Herring Clupea Harengus in the Southern Gulf of St Lawrence written by Hugues Pascal Benoît and published by . This book was released on 2016 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessment Framework for Fall spawning Atlantic Herring Clupea Harengus in the Southern Gulf of St Lawrence NAFO Div 4T written by D. P. Swain and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diel differences in oxygen consumption and swimming activity in Atlantic herring Clupea harengus L larvae written by Muriel-Marie Kroll and published by . This book was released on 2008 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A New Perspective written by Emily Klein and published by . This book was released on 2008 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Feeding Ecology of Baltic Sea Herring Clupea Harengus L written by Fredrik Arrhenius and published by . This book was released on 1995 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishery Bulletin written by and published by . This book was released on 1991 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Separation of Atlantic Herring Clupea Harengus Stocks in the Southern Gulf of St Lawrence Using Digitized Otolith Morphometrics and Discriminant Function Analysis written by S. N. Messieh and published by Dartmouth, N.S. : Fisheries and Oceans, Canada. This book was released on 1989 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The identification of Atlantic herring stocks inhabiting both sides of the northern Atlantic has been the subject of numerous investigations for many years. In more recent years, the discreteness of the spring and autumn herring populations in the Gulf of St. Lawrence was established, a separation important for delineating proper fishery management units. Otolith characteristics, such as shape and first year's growth, were used in both the Gulf and Newfoundland regions, but the method used requires well-trained technicians and was criticized because of its subjectivity. A semi-automated microcomputer-based measuring system was developed for otolith measurements in the Gulf region to eliminate such subjectivity. The method uses a microscope with a drawing tube and a digitizer interfaced to a personal computer which analyzes the digitized otolith measurements using software packages. This report presents results using this system to separate herring spawning groups by otolith morphometrics.

Download or read book Species Conservation and Management written by H. Resit Akcakaya and published by Oxford University Press. This book was released on 2004-10-07 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume is a collection of population and metapopulation models for a wide variety of species, including plants, invertebrates, fishes, amphibians, reptiles, birds, and mammals. Each chapter of the book describes the application of RAMAS GIS 4.0 to one species, with the aim of demonstrating how various life history characteristics of the species are incorporated into the model, and how the results of the model has been or can be used in conservation and management of the species. The book comes with a CD that includes a demo version of the program, and the data files for each species.