Els eixams de meduses i la salut del mar

Com cada any, també aquest estiu han aparegut meduses a les nostres platges. Un fe-nomen que anys enrere es produïa de tant en tant ara s'ha tornat molt més freqüent. La seva convivència amb els banyistes ja s'ha fet habitual, però no deixa de resultar proble-màtica i causa de molts disgustos. Hi ha alguna solució

Els eixams de meduses i la salut del mar

5 pages, 9 figuresCom cada any, també aquest estiu han aparegut meduses a les nostres platges. Un fenomen que anys enrere es produïa de tant en tant ara s’ha tornat molt més freqüent. La seva convivència amb els banyistes ja s’ha fet habitual, però no deixa de resultar problemàtica i causa de molts disgustos. Hi ha alguna solució?Peer reviewe

A new species of Nidalia Gray, 1835 from Mid-Atlantic seamounts (Octocorallia, Alcyonacea, Nidaliidae)

A new soft coral species of the genus Nidalia, from seamounts to the south of the Azores Archipelago is described. The main features of Nidalia aurantia n. sp. are as following: colony torch-like, a capitulum light orange in colour, not laterally Xattened, dome-shaped and not distinctly projecting beyond the stalk, an introvert with sparse sclerites transversally placed, and an anthocodial crown with 13–17 sclerite rows. The new species is compared with its closest congeners. This is the Wrst time that a species of Nidalia has been located in the Mid-Atlantic Ocean

Cnidarios de una laguna costera de la Isla de Mallorca

Abstract not availabl

Processes occurring during fish larvae stages as determinants of year-class strength in fish populations in the North-Western Mediterranean

The spatial and temporal mesoscale distribution pattern of fish larvae on the Catalan coast is closely linked both to mesoscale hydrodynamic mechanisms in the area, and to the distribution patterns of the remainder of zooplankton, including their predators and potential prey. Spatial coincidence with their most likely prey and the non-coincidence in time with their predators or potential competitors for the same prey are considered to be the mechanisms that most contribute to the survival of fish larvae in the area studied. The set of processes described which occur during the larval fish stages on the Catalan coast is one of the factors that may explain the fact that the number of adults captured has remained constant over recent years, despite the fact that the fisfiing effort has suffered few variations, that fishing power has increased (a greater number of ships with more efficient techniques), and that fishing techniques have diversified (there is now a tendency to exploit a greater number of species)

La nova edició espanyola de la CDU : arriscar-se al canvi?

Analise of the Medium CDU spanish edition. Avaluation of the news titles, indexs tables, etc