Abstract. Observations of the fish fauna of Posidonia oceanica (L.) DELILE
seagrass beds were undertaken in two shallow stations and one deeper station in
Port‐Cros National Park, between November 1984 and September 1987. Demographic
structure, density and biomass of the 19 most abundant species or taxa were
assessed by several non‐destructive sampling methods. The fish assemblages
studied were do... hiện toàn bộ
Klaus Rützler, Deborah L. Santavy, Arnfried Antonius
Abstract. Some reef building corals in the western Atlantic are susceptible to
an infection known as black band disease that is caused by the cyanophyte
(cyanobacterium) Phormidium corallyticum Rützler & Santavy. Field observations
on the barrier reef of Belize and on reefs of the Bermuda platform indicate the
disease is fairly common in susceptible species. Coral tissue destruction
monitored in s... hiện toàn bộ
AbstractSubmarine canyons are important sources of habitat heterogeneity on the
slopes of continents and islands, but the study of canyon ecology has been
largely restricted to continental margins. Here we use visual and video surveys
from 36 submersible dives to evaluate the role of canyons as abundance and
diversity hotspots for megafauna in the Hawaiian Archipelago, an island chain
embedded in ... hiện toàn bộ
AbstractA giant pockmark colonised by dense cold‐seep assemblages near 3160 m
depth along the Congo‐Angola margin has been surveyed by the ROV Victor 6000.
The quantitative distribution of chemosynthetic communities was mapped along the
dive tracks from a video study using GIS and image mosaicking. Several types of
faunal assemblages, either dominated by bivalves of the families Mytilidae
(Bathymo... hiện toàn bộ
Abstract. Fishes associated with the seagrass Posidonia oceanica were censused
both by skid trawl and visual counts around Ischia Island, Italy. Both sampling
procedures were performed during the day in summer and in winter at two sites.
Significant differences in the number of species, number of individuals,
biomass, and trophic structure of the fish assemblage were observed between
sampling meth... hiện toàn bộ
Dimitris Vafidis, Anthony R. Russo, Eleni Voultsiadou, Christos Arvanitidis, Despina Stefanidou
Abstract. The macrofaunas associated with the three morphologically different
North Aegean Sea sponge species Agelas oroides, Aplysina aerophoba, and Axinella
cannabina were compared. The faunal abundance was not related to sponge surface
area for any of the three species. Each sponge species supported a significantly
different number of individuals per unit canal volume; A. aerophoba supported
th... hiện toàn bộ
Abstract. The relationship between a sponge, Callyspongia vaginalis, and an
associated brittlestar, Ophiothrix lineata, was examined for mutualistic
symbiotic interaction. Cinematography, feeding experiments, and analyses of
stomach contents reveal that O. lineata (unlike other Ophiothrix species) is a
non‐selective deposit feeder. Its diet consists of detrital particles adhering
to the sponge, wh... hiện toàn bộ
Abstract. During two expeditions with RV ‘Meteor’ in summer 1993 and winter
1997/98 the structural and functional diversity of the benthic system of the
highly oligotrophic eastern Mediterranean deep sea was investigated. The
macrofauna communities were dominated by polychaetes even at the deepest
stations.The fauna at shallow stations was dominated by surface deposit feeders,
whereas subsurface ... hiện toàn bộ
Abstract. The composition of the algal diet of Siganus luridus was compared with
that of the algal vegetation found in fish habitats along the Mediterranean
coast of Israel. North‐south differences in the diet were found and reflected
differences in the available algal resources as well as in algal species
selected.In the northern area, the diet and the algal selection differed
considerably betwee... hiện toàn bộ
Abstract. Important intertidal sabellarian reefs are built by the polychaete
Sabellaria alveolata (LINNÉ) in the Mont Saint‐Michel Bay in Normandy at
Champeaux (France). Typical profiles and plans were done over a ten year period.
At the same time, population dynamics were examined during the last six years.
At this site a nearly complete morphological cycle spread itself over more than
ten years.... hiện toàn bộ