Among catfish species of the genus Rhamdia reported for the Brazilian territory, R. quelen is the most widespread, being found in nearly all hydrographic basins of Brazil. Nowadays, R. quelen is a synonym for at least 47 other species in this genus, its taxonomic status still being controversial. The available cytogenetic reports show a wide variation in the karyotypic macrostructure, with the ...

We present a year-round assessment of the hydrographic variability within the East Greenland Coastal Current on the Greenland shelf from five synoptic crossings and 4 years of moored hydrographic data. From the five synoptic sections the current is observed as a robust, surface intensified flow with a total volume transport of 0.666 0.18 Sv and a freshwater transport of 426 12 mSv. The moorings...

In this paper, we seek to design, develop, and explore a typical geo-database for hydrographic purposes through the aid of some Open-Source Geographical Information System (GIS) and relational database packages that had been confirmed and certified to be adequate for various GIS tasks. One of the recent and reliable OpenSource software in GIS analysis is gvSIG. gvSIG is a tool oriented to manag...

The mean dynamic topography of the surface of the North Atlantic is estimated using an inverse model of the ocean circulation constrained by hydrographic and altimetric observations. In the North Atlantic, altimetric observations have no signi®cant impact on the topography estimate because of the limited precision of available geoid height models. They have a signi®cant impact, however, when un...

IBAMar is a regional database that puts together all the physical and biochemical data provided by multiparametric probes and water sample analysis taken during the cruises managed by the Balearic Oceanographic Center of the Instituto Español de Oceanografía (COB-IEO) during the last four decades. Initially, it integrated data from hydrographic profiles obtained from CTDs (conductivity, tempera...

We analyse the spatial structure of early developmental stages of three ecologically important small pelagic schooling species in the northwestern Mediterranean sea: the anchovy Engraulis encrasicolus, the round sardinella Sardinella aurita, and the sardine Sardina pilchardus. We used data on egg and larval abundance (arranged by development stage), hydrographic data and potential prey biomass ...

The performance of coupled climate models (CCMs) in simulating the hydrographic structure and variability of the northwestern North Atlantic Ocean, in particular the Labrador and Irminger Seas, has been assessed. This area plays an important role in the meridional overturning circulation. Hydrographic properties of the preindustrial run of eight CCMs used in the Intergovernmental Panel on Clima...

[1] We assessed interrelations between climatic, meteorological and hydrological factors in the Balearic Sea, and identified drivers of the abundance variability of planktonic copepods over the period 1994–2003. Temporal variability in the total abundance of copepods appears to be indicative of the southern spreading of the Northern Current, and therefore of meridional transport of water masses...

In situ measurements of surface chlorophyll and zooplankton concentration are compared with in situ hydrographic measurements and infrared satellite images of the west coast of British Columbia for early winter and midsummer study periods. Maximum winter concentrations ofchlorophyll (1.0 mg m-3) and zooplankton (2900 counts m-3) were found in colder, more stratified nearshore water. Warmer wate...