Filters: Tags: Marine Biology (X)183 results (2s)
Impact of elevated ammonium on reproduction in two Hawaiian scleractinian corals with different life history patterns
Categories: Publication; Types: Citation; Tags: Aluminium, Ammonium, Animal Physiology, Breeding success, Coelenterates (Corals),
Assimilation efficiencies and turnover rates of trace elements in marine bivalves: A comparison of oysters, clams and mussels
Assimilation efficiencies (AEs) and physiological turnover-rate constants (k) of six trace elements (Ag, Am, Cd, Co, Se, Zn) in four marine bivalves (Crassostrea virginica Gmelin,Macoma balthica Linnaeus, Mercenaria mercenaria Linnaeus, and Mytilus edulis Linnaeus) were measured in radiotracer-depuration experiments. Egestion rates of unassimilated elements were highest during the first 24 h of depuration and declined thereafter. Significant egestion of unassimilated Co, however, continued for up to 5 d in Macoma balthica,Mercenaria mercenaria and Mytilus edulis. With the exception of the extremely low values for110 mAg, 109Cd, and 65Zn in C. virginica, physiological turnover-rate constants (k) showed no general...
Categories: Publication; Types: Citation; Tags: Biodegradation, Bioengineering Abstracts; Environmental Engineering Abstract, Butyltin compounds, Chemical analysis, Contamination,
Effects of nutritional history on nitrogen assimilation in congeneric temperate and tropical scleractinian corals
The nutritional history of corals is known to affect metabolic processes such as inorganic nutrient uptake and photosynthesis, but little is known about how it affects assimilation efficiency of ingested prey items or the partitioning of prey nitrogen between the host and symbiont. The temperate scleractinian coral Oculina arbuscula and its tropical congener Oculina diffusa were acclimated to three nutritional regimes (fed twice weekly, starved, starved with an inorganic nutrient supplement), then fed Artemia nauplii labeled with the stable isotope tracer 15N. Fed corals of both species had the lowest assimilation efficiencies (36-51% for O. arbuscula, 38-57% for O. diffusa), but were not statistically different...
Categories: Publication; Types: Citation; Tags: Caspian Sea, Cesium, Climatic changes, Environmental impact, Eurasia, Caspian Sea,
Predator biomass, prey density, and species composition effects on group size in recruit coral reef fishes
Group incidence and size are described for recruit parrotfishes, wrasses, and damselfishes on Hawaiian reefs over 3 years (2006–2008) at sites spanning the archipelago (20–28°N, 155–177°W). Coral-poor and coral-rich areas were surveyed at sites with both low (Hawaii Island) and high (Midway Atoll) predator densities, facilitating examination of relations among predator and recruit densities, habitat, and group metrics. Predator and recruit densities varied spatially and temporally, with a sixfold range in total recruit densities among years. Group (≥2 recruits) metrics varied with time and tracked predator and recruit densities and the proportion of schooling species. Groups often included heterospecifics whose...
Categories: Publication; Types: Citation; Tags: Animals, Bioengineering Abstracts, Birds, Conservation, Environmental impact,
Categories: Publication; Types: Citation; Tags: Biocommunications, Bioelectromagnetism, Bioengineering Abstracts, Electromagnetism, Electrophysiology,
Robustness of supercritical fluid extraction (SFE) in environmental studies: analysis of chlorinated pollutants in tissues from the osprey (pandion haliaetus) and several fish species
Categories: Publication; Types: Citation; Tags: Bioengineering Abstracts, Chlorinated pollutants, Chlorination, Chromatography, Environmental impact,
Measuring and modelling the dynamic response of remote mountain lake ecosystems to environmental change: An introduction to the MOLAR project
Categories: Publication; Types: Citation; Tags: Air quality, Biological impact, Climate change, EE 444 Water Resources; EE 454.3 Ecology and Ecosystems; EE , Ecosystems,
Shrimp trawling is common throughout the southeastern and Gulf of Mexico coasts of the USA and is the primary contributor to fisheries discards in these regions. Tens of thousands of nearshore seabirds nest near shrimp trawling grounds in the USA, but to date, there has been no assessment of the relationship between seabirds and shrimp trawlers. We examined the taxonomic composition of bycatch, rate at which seabirds scavenged bycatch, and energy density of discarded bycatch in a nearshore commercial shrimp fishery. Bycatch was primarily comprised of demersal fish that are not typically accessible to the plunge-diving and surface-feeding seabirds that occur in the area. Hence, seabird diets in the region appear...
The dataset includes multiple file types (CSV, ArcGIS shapefiles, and images), data relates to the elemental analysis of fish otoliths. Otoliths examined in this study were from randomly-sampled individual Tidewater Goby (Eucyclogobius newberryi) and Prickly Sculpin (Cottus asper) from the adult population of Rodeo Lagoon and Rodeo Creek, Marin County, California. The fish were collected in April and August 2016.
Categories: Data; Tags: Aquatic Biology, California, Coastal fishes, Ecology, Environmental Health,
OBIS-USA brings together marine biological occurrence data – recorded observations of identifiable marine species at a known time and place, collected primarily from U.S. Waters or with U.S. funding. Coordinated by the Science Analytics and Synthesis (SAS) Program of the United States Geological Survey (USGS), OBIS-USA, strives to meet national data integration and dissemination needs for marine data about organisms and ecosystems. OBIS-USA is part of an international data sharing network (Ocean Biodiversity Information System, OBIS) coordinated by the Intergovernmental Oceanographic Commission, of UNESCO (United Nations Educational, Science and Cultural Organization) International Oceanographic Data and Information...
Tags: Arctic Ocean, Atlantic Ocean, Bay of Fundy, Beaufort Sea, Bering Sea,
A flume system and protocol for measuring the filtration rate of infaunal bivalves is described. Assemblages of multi-sized clams, at natural densities and in normal filter-feeding positions, removed phytoplankton suspended in a unidirectional flow of water. The free-stream velocity and friction velocity of the flow, and bottom roughness height were similar to those in natural estuarine waters. Continuous variations in phytoplankton (Chroomonas salinay) cell density were used to measure the filtration rate of the suspension-feeding clam Potamocorbula amurensis for periods of 2 to 28 h. Filtration rates of P. amurensis varied from 100 to 580 liters (gd)-1 over a free-stream velocity range of 9 to 25 cm s-1. Phytoplankton...
Example of an integrated approach for health and environmental risk assessment: the case of organotin compounds
Categories: Publication; Types: Citation; Tags: Bioengineering Abstracts; Environmental Engineering Abstract, Ecology, Environmental impact, Environmental risk assessment, Health,
Contamination and wildlife communities in stormwater detention ponds in Guelph and the Greater Toronto Area, Ontario, 1997 and 1998. Part II - contamination and biological effects of contamination
Categories: Publication; Types: Citation; Tags: Copper, EE 445.2 Water Analysis; EE 453.2 Water Pollution Control; E, Ecosystems, Environmental Engineering Abstracts, Environmental impact,
Categories: Publication; Types: Citation; Tags: Combined sewers, Drainage, EE 453.2 Water Pollution Control; EE 454.2 Environmental Imp, Ecology, Ecosystems,
Estimates of vital rates for a declining loggerhead turtle (<i>Caretta caretta</i>) subpopulation: implications for management
Because subpopulations can differ geographically, genetically and/or phenotypically, using data from one subpopulation to derive vital rates for another, while often unavoidable, is not optimal. We used a two-state open robust design model to analyze a 14-year dataset (1998–2011) from the St. Joseph Peninsula, Florida (USA; 29.748°, −85.400°) which is the densest loggerhead (Caretta caretta) nesting beach in the Northern Gulf of Mexico subpopulation. For these analyses, 433 individuals were marked of which only 7.2 % were observed re-nesting in the study area in subsequent years during the study period. Survival was estimated at 0.86 and is among the highest estimates for all subpopulations in the Northwest Atlantic...
How well seabirds compensate for variability in prey abundance and composition near their breeding colonies influences their distribution and reproductive success. We used tufted puffins (Fratercula cirrhata) as forage fish samplers to study marine food webs from the western Aleutian Islands (53°N, 173°E) to Kodiak Island (57°N, 153°W), Alaska, during August 2012–2014. Around each colony we obtained data on: environmental characteristics (sea surface temperature and salinity, seafloor depth and slope, tidal range, and chlorophyll-a), relative forage fish biomass (hydroacoustic backscatter), and seabird community composition and density at-sea. On colonies, we collected puffin chick-meals to characterize forage communities...
Categories: Publication; Types: Citation; Tags: Accident prevention, Benthic communities, Bioengineering Abstracts, Biological monitoring, Boat groundings,