Species composition, distribution, density, biomass, diversity and trophic relationships of the macrobenthic communities in Ubatuba Bay, southeastern Brazilian coast, were investigated seasonally from August 1995 to June 1996. Sampling was carried out at 9 stations of between 4 and 13 m depth and taken in duplicate with a 0.1m2 van Veen grab. Two hundred and five macrofaunal species were identi...

The influence of sediment oxygen heterogeneity, due to bioturbation, on diffusive oxygen flux was investigated. Laboratory experiments were carried out with 3 macrobenthic species presenting different bioturbation behaviour patterns: the polychaetes Nereis diversicolor and Nereis virens, both constructing ventilated galleries in the sediment column, and the gastropod Cyclope neritea, a burrowin...

Coral reef lagoons are generally regarded as zones of net heterotrophy reliant on organic detritus generated in more productive parts of the reef system, such as the seaward reef flat. The abundance and biomass of sediment infauna were measured seasonally for one year (1986) within the lagoon of Davies Reef, central Great Barrier Reef, to test the hypothesis that macrofaunal biomass and product...

The marine polychaete Chaetopterus variopedatus (Renier) (family Chaetopteridae) is a cosmopolitan species complex, consisting of distinct populations/ subspecies. worms release glowing (460 nm) clouds mucus when disturbed, and their parapodia often glow brightly. Currently, it still unclear how exactly the bioluminescence system these polychaetes functions. It has been previously assumed that ...

Oyster aquaculture is one of several methods for the restoration Delaware Inland Bays; however, little known about its potential impacts on benthic community bays. In this study, water quality parameters were measured and polychaetes collected from 24 sampling locations at Rehoboth, Indian River, Little Assawoman Bays July to October 2016 2017. We aimed assess impact Eastern oyster farming unde...

Recent excavations of the Guanshan biota at Shijiangjun section in eastern Yunnan Province, South China, have revealed many well-defined faecal pellets and related trace fossils. These can be assigned to three morphotypes, which affinities with ichnogenera Tomaculum, Alcyonidiopsis Tubulichnium. Morphotype 1 is an unbranched burrow filled randomly distributed pellets. 2 a string-shaped without ...