Copepods attain high abundance, biomass and production in the absence of large predators but suffer cannibalistic loss
Seasonal and spatial variation of suspended and sedimented nutrients (C, N, P) in the pelagic system of the Gulf of Riga
Individual-based approach to evaluating experimental designs for estimating rates of fish movement from tag recoveries
Modelling the geomorphological impact of climatic variability and extreme events in a semi-arid environment
Modelling mass failure in a Mediterranean mountain environment: climatic, geological, topographical and erosional controls
An improved procedure for detection and enumeration of walrus signatures in airborne thermal imagery
In recent years, application of remote sensing to marine mammal surveys has been a promising area of investigation for wildlife managers and researchers. In April 2006, the United States and Russia conducted an aerial survey of Pacific walrus (Odobenus rosmarus divergens) using thermal infrared sensors to detect groups of animals resting on pack ice in the Bering Sea. The goal of this survey was to estimate the size of the Pacific walrus population. An initial analysis of the U.S. data using previously-established methods resulted in lower detectability of walrus groups in the imagery and higher variability in calibration models than was expected based on pilot studies. This paper describes an improved procedure...
Categories: Publication; Types: Citation; Tags: International Journal of Applied Earth Observation and Geoinformation
Retrospective analysis of associations between water quality and toxic blooms of golden alga (<i>Prymnesium parvum</i>) in Texas reservoirs: Implications for understanding dispersal mechanisms and impacts of climate change
Toxic blooms of golden alga (GA, Prymnesium parvum) in Texas typically occur in winter or early spring. In North America, they were first reported in Texas in the 1980s, and a marked range expansion occurred in 2001. Although there is concern about the influence of climate change on the future distribution of GA, factors responsible for past dispersals remain uncertain. To better understand the factors that influence toxic bloom dispersal in reservoirs, this study characterized reservoir water quality associated with toxic GA blooms since 2001, and examined trends in water quality during a 20-year period bracketing the 2001 expansion. Archived data were analyzed for six impacted and six nonimpacted reservoirs from...
Achieving global convergence to an equilibrium population in predator-prey systems by the use of a discontinuous harvesting policy