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26 - 50 of 79 Items << < 1 2 3 4 > >>
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Association of goose-neck barnacles and black mussels on a littoral reef at Ocean Beach, Oregon; 1940-09-29 Photograph from Album 1 page 44
2024-05-02
2003-01-01 |
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The Ralph I. Gifford Photographs consist
of images taken by Gifford throughout Oregon, primarily during the 1930s
and 1940s. The photographs depict many Oregon landmarks and scenes,
including the Oregon Coast, Crater Lake, Mount Hood, the Wallowa...
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Cold seep communities with distinctive chemoautotrophic fauna occur where hydrocarbon-rich fluids escape from the seabed. We describe community composition, population densities, spatial extent, and within-region variability of epifaunal...
2013-10-18 (iso8601)
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The overall objective of SPICOSA is to develop a self-evolving, holistic research approach for integrated assessment of Coastal Systems so that the best available scientific knowledge can be mobilized to support deliberative and decision-making...
2008 (iso8601)
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Littoral rocks covered with goose-neck barnacles and black mussels on the Oregon Coast at Ocean Beach, Oregon; 1940-09-29; From Album 1 page 44
2024-05-02
2003-01-01 |
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While community ecologists have traditionally focused on local-scale
processes, it has become apparent that a broader perspective, which explores the
community-level ramifications of material fluxes within and between ecosystems, is
necessary to...
2003-05-12 (iso8601)
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Field surveys of freshwater mussels (family Unionidae) were conducted at 49 sites in 22 waterbodies (4 rivers, 7 reservoirs, and 11 streams) within the Red, Trinity, Neches, and Sabine drainage basins using standard qualitative and quantitative...
2009-11-25
2009-11-25 2007-11-09 2009-11-25 |
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Glochidial development in freshwater mussels (Mararitifera margaritifera) located in the Siletz River, Oregon, was completed in 13 days at an average water temperature of 12.8 C. Glochidia were released by these mussels for 33 days, May 13 to June...
1972-10-10 (iso8601)
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Archaeological evidence demonstrates over 10,000 years of human interactions with plant and animal populations in the Western United States (Anderson 2005, Broughton 1999, Jones and Raab 2004). Generally these studies have demonstrated adverse...
2008 (iso8601)
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The prey consumption rates of two estuarine crab species were compared: the introduced Carcinus maenas and the native Cancer magister. Similar sized crabs of each species were placed into individual perforated plastic boxes and then placed in a...
2007-01-11T14:59:38Z (iso8601)
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The Fish and Wildlife Service and the National Marine Fisheries Service (Services) have adopted a policy that will address the conservation needs of species listed, or proposed to be listed, under the Endangered Species Act of 1973, as amended...
1996-06-03
2008-08-19 2005-06-22 |
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The contribution of genetic effects to the variation in percent normal development observed in a bay mussel (Mytilus edulis L.) embryo bioassay was determined. A factorial breeding experiment
was accomplished in which 9 males were mated with 3...
1973-12-11 (iso8601)
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Mussel farming as an aquaculture activity based on the natural primary productivity, faces risks similar to those of the agriculture sector. Consequently, much theoretical risk research has been applied to aquaculture as in agriculture, livestock,...
2010 (iso8601)
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The body size (W) of animal species is one of the best predictors of
population density (D) when large assemblages are considered. It has been
shown that theoretically the D-W relationship can be the consequence of two
other distributions: the...
1994-08-30 (iso8601)
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1. The effective number of species (ENS) has been proposed as a robust measure of species diversity that overcomes several limitations in terms of both diversity indices and species richness (SR). However, it is not yet clear if ENS improves...
2019-01-25
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For hundreds of years, coastal and marine ecosystems have experienced increasing threats due to the cumulative effects of increasing population growth and dependence on these ecosystems. Thus, there has been increased enthusiasm to mitigate the...
2016-08-03 (iso8601)
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Anthropogenic activities can induce major trophic shifts in aquatic systems, yet we have an incomplete understanding of the implication of such shifts on ecosystem function and on primary production (PP) in particular. In recent decades,...
2016-05-12
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North American freshwater mussels have been subjected to multiple stressors in recent decades that have contributed to declines in the status and distribution of many species. However, considerable uncertainty exists regarding the relative...
2013-02 (iso8601)
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High specific activity tritiated thymidine (40-60 Ci/mM) and
autoradiographic techniques were used to study cell renewal systems
in the freshwater mussel, Margaritifera margaritifera.
Groups of mussels were injected with tritiated thymidine
(1.0...
1973-06-06 (iso8601)
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Since the late 1990s, the central basin of Lake Erie has reputedly experienced an increase in the frequency and severity of hypoxic events. However, total phosphorus (TP) loading, in-lake TP concentrations, chlorophyll a (Chl a), and sediment...
2017-06-01
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