ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Prolonged and sustained warming of the sea, acidification of surface water and rising of sea levels, creates significant habitat losses, resulting in the proliferation and spread of invasive species which immigrate to foreign regions seeking colder climate conditions. This is happening either because ...
Albacore tuna (Thunnus alalunga) is one of the important commercial species of the longline fishery in the southern Indian Ocean (SIO). The satellite-based oceanographic data of net primary production (NPP), sea-surface temperature (SST), sea surface salinity (SSS), mixed layer depth (MLD), sea-surface ...
The São Francisco River is located in the northeast portion of Brazil. It is an important river from economic and social viewpoint. This river has been cited, in the literature, as the classical example of wave-dominated delta, however, changes in water discharge due to the construction of seven dams ...
The key enabling technology in dynamic spectrum access is Cognitive Radio that allows unlicensed secondary users to access the licensed bands without causing any interference to the primary users. In any situation where there are a certain number of secondary networks trying to get an available channel, ...
We challenge the often-made claim that fully polarimetric synthetic aperture radars (SARs) are beneficial for discriminating between mineral oil films and biogenic slicks. We conjecture that the results obtained from previous analyses of spaceborne polarimetric SAR data, which seem to show differences ...
Automatic generation of natural language descriptions for images has recently become an important research topic. In this paper, we propose a frame-based algorithm for generating a composite natural language description for a given image. The goal of this algorithm is to describe not only the objects ...
Species integrity can be challenged, and even eroded, if closely related species can hybridize and produce fertile offspring of comparable fitness to that of parental species. The maintenance of newly diverged or closely related species therefore hinges on the establishment and effectiveness of pre- ...
In this paper, we provide an overview of ocean color products derived from the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (SNPP), which was launched on October 28, 2011. VIIRS ocean color products include normalized water-leaving radiance ...
This paper submits the results of the acoustic cruise made in the austral summer of 2016. The survey delivers the bottom bathymetry, the geographic distribution of krill concentrations, and the presence of fish shoals in 1,500 nautical miles over the shelf and the continental slope (100–500 m), around ...
Science is an important part of human life. It is the application process and the construction of knowledge regarding a phenomenon of nature. Scientific development and technology management are the basis for national development, social progress, and an important indicator of overall competitiveness ...
The Peruvian Marine Research Institute — IMARPE, has been conducting scientific hydroacoustic survey since 1983 in order to estimate the biomass of the main pelagic resources for fishing management. The multifrequency analysis used for species identification was recommended in 2000 by the International ...
A temporal change of lights from islands on the South China Sea was monitored by the Day/Night Band (DNB) of the visible infrared imaging radiometer (VIIRS) on the Suomi-NPP from 2014 to 2016. As the DNB data could be contaminated by the lunar lights reflected by clouds for half of each month, the DNB ...
The spatiotemporal fluctuation of flying squid resources from July to November in 2009 to 2014 and its relationship with ocean environmental variables are analyzed with the GAM model in this study. The most suitable SST, SLA and Chla are 16–18°C, 0.5–4 cm and 0.25–0.3 mg/m3, respectively. The model ...
The Sargasso Sea has been a ocean life habitat for millions of years, yet accurate assessment of the boundary area and detection of these relatively small sea surface features using Landsat series and Moderate resolution Imaging Spectroradiometer (MODIS) instruments have been found to have difficulty ...
The Juan Fernandez archipelago is located along an east-west ridge in the southeastern Pacific Ocean, off the coast of central Chile. It consists of three oceanic islands organized into two subsystems: Alejandro Selkirk (AS), Robinson Crusoe and Santa Clara (RC-SC). The marine ecosystem of this island ...
In 2016 the Argentine Institute for Fisheries Research (INIDEP) initiated the building of a new Fisheries and Oceanographic Research Vessel at the Armon shipyards, in Vigo, Spain. The new R/V, named Victor Angelescu after one of the pioneers in Fisheries science in Argentina, was designed and built ...
Underwater acoustics have an unrealized potential for multicomponent ecosystem characterization. A variety of methods (e.g., backscattering differences, clustering, Gaussian model) are currently used for multifrequency classification. In this study we propose and implement a new method based on the ...
In Argentina, stock assessment of Patagonian scallop (Zygochlamys patagónica) is carried out applying the swept area method using a dredge. Hence, for the accuracy of the biomass estimation contact of the dredge with the bottom is critical. Generally during these surveys the dredge contact with the ...
Typical career development of engineers and scientists differs between countries. In some countries, people must pursue an industrial career before they become eligible for an academic one, in other countries people can start an academic career following their university graduation. This paper describes ...
Scrutiny and analysis of multi-frequency digital echograms are the basis of modern fisheries acoustics biomass estimations. Currently, several data formats and dedicated software exists for this purpose, however commercial options tends to be expensive. Moreover, acoustic analysis is complex, and besides ...