scholarly journals A small collection of Endeis juveniles (Arthropoda: Pycnogonida: Endeidae) sorted from the fouling organisms on the R/V Dayangyihao

2021 ◽  
Vol 9 ◽  
Author(s):  
Jianjia Wang ◽  
Dong Sun ◽  
Peng Tian ◽  
Dinyong Huang ◽  
Wentao Niu ◽  
...  
Keyword(s):  
West Africa ◽  
Current Paper ◽  
Fouling Community ◽  
Small Collection ◽  
Fouling Organisms

Endeis straughani Clark, 1970 was originally described from Queensland, Australia. Its range was extended to Ghana, West Africa when E. picta Bamber, 1979 was synonymised with E. straughani by Staples (1982). The current paper extends this range further, to include Port Louis, Mauritius. Five immature individuals gathered amongst hydroids during the 5th leg of the DY125-34 expedition were tentatively identified as E. straughani juveniles. Since these were collected from the fouling community on the ship’s hull, they probably originated in Port Louis (Mauritius) when the ship was docked there.

BIOMASS EXPORTATION FROM OFFSHORE PRODUCTION PLATFORMS IN EAST TEXAS

1981 ◽  
Vol 1981 (1) ◽  
pp. 715-720
Author(s):  
Nick Fotheringham
Keyword(s):  
Marine Ecosystem ◽  
Benthic Fauna ◽  
Control Site ◽  
Hermit Crabs ◽  
Fouling Community ◽  
Offshore Production ◽  
Significant Difference ◽  
Fish Gut ◽  
Fouling Organisms ◽  
Offshore Production Platforms

ABSTRACT Studies of the structure and development of the fouling community on active offshore production platforms in the Buccaneer Field, Texas, indicated that energy accumulated within this community was exported to components of the adjacent marine ecosystem along three major pathways. The most apparent pathway was through grazing fish. Gut content analyses of 191 fish representing 27 species indicated that the spadefish (Chaetodipterus faber), sheepshead (Archosargus probatocephalus), crested blenny (Hypleurochilus geminatus), cocoa damselfish (Pomacentrus variabilis), and cubbyu (Equetus acuminatus) feed extensively on fouling organisms. A second pathway linked the fouling community to the benthic fauna living beneath the platforms, which was apparently enriched by consumption of barnacles and other invertebrates dislodged from the platform legs by wave and current stresses, abrasion by boats, and foraging fish. Several fouling species, which did not occur on the structures themselves, were found on dislodged barnacle shells and gastropod shells occupied by hermit crabs. Thus, accumulation of biomass beneath the structures is apparently increased by the presence of these shells. The third pathway linked the fouling community to planktivorous fish and invertebrates through the release of planktonic larvae by fouling organisms. A significant difference (p < 0.05) was found in the proportion of these larvae in the total plankton between stations within Buccaneer Field and those at a control site 8 kilometers east of the field.

scholarly journals Mini-review Summary

2020 ◽  
Vol 12 (1) ◽  
pp. 1
Author(s):  
Ronald Osei Mensah ◽  
Charles Obeel
Keyword(s):  
Systematic Review ◽  
West Africa ◽  
Rural Areas ◽  
Current Paper ◽  
Fear Reaction ◽  
The North ◽  
North Eastern ◽  
The Town ◽  
North Eastern Part

This mini review brings to bear a situation that occurred in the rural areas of West Africa where the inhabitants accused others of being responsible for the loss of their genitals. The town of reference is Zorse, which is inhabited by the Kusasi tribe in the North Eastern part of Ghana. Anthropologists and psychologists explain anxiety assault as a fear reaction that emanates from a people’s belief that a person can cause sex organs to vanish or shrink. Charles Mather used ethnography to describe detailed accounts of happenings. This current paper provides a systematic review of happenings based on the information gathered from the script of Mather. It is revealed that the explanations offered are also grounded in bioengineering and psychology.

Alterations to the relative species-abundance of ascidians and barnacles in a fouling community due to screens

1980 ◽  
Vol 31 (2) ◽  
pp. 147 ◽  
Author(s):  
JI Marshall ◽  
FWE Rowe ◽  
RP Fisher ◽  
DF Smith
Keyword(s):  
Species Composition ◽  
Species Abundance ◽  
Mesh Size ◽  
Fouling Community ◽  
Bryozoan Species ◽  
Styela Plicata ◽  
Barnacle Species ◽  
Fouling Organisms

The species composition and abundance of a community of fouling organisms can be altered by shielding the surface to be settled with fibreglass screen of 1.0 mm mesh size. Settlement and survival of two barnacle species is nearly precluded, while that of the ascidians Pyura praeputialis, Styela plicata, S. pedata and Diplosoma listerianum and of several bryozoan species is greatly enhanced. S. pedata was found to survive almost exclusively on screened plate surfaces.

XV.—On some Cretaceous Brachiopoda and Mollusca from Angola, Portuguese West Africa

1917 ◽  
Vol 51 (3) ◽  
pp. 561-580 ◽  
Author(s):  
R. Bullen Newton
Keyword(s):  
West Africa ◽  
Important Paper ◽  
North West ◽  
Limited Knowledge ◽  
Railway Company ◽  
The North ◽  
Small Collection ◽  
The Subject

The following notes have been prepared as the result of a study of a small collection of fossils belonging chiefly to the Pelecypoda and Gastropoda, which were obtained by Professor J. W. Gregory, F.R.S., from the Cretaceous rocks of the neighbourhood of Lobito Bay, situated to the north of Benguella, in the province of Angola. At first sight the specimens appeared to be of too unsatisfactory a character for determination, on account of their fragmentary condition, besides often consisting of natural casts. From a closer examination, however, it has been possible to trace some details of structure which have afforded clues to the identification of certain genera and species, a record of which will assist in extending our present limited knowledge of the Cretaceous conchology of this region of Africa. During the progress of these researches, a few further specimens from the same locality were added to Professor Gregory's collection, having been specially obtained by Mr E. Robins, of the Benguella Railway Company. So far as the literature of the subject is concerned, we appear to be indebted to the memoirs of Professor Paul Choffat of Lisbon for most of our information on the Cretaceous fauna of Angola, although reference should also be made to a small and important paper by M. Stanislas Meunier issued in 1888, which contains the earliest known figures of Cretaceous mollusca (Cephalopoda) from Angola, consisting of Schloenbachia inflata, J. Sowerby, Desmoceras cuvervillei, Stan. Meun., Hamites virgulatus, Brongniart, and H. tropicalis, Stan. Meun. These specimens, obtained from the limestones of Lobito Bay, north of Benguella, were considered to be of Albian age, the forms of S. inflata being regarded as identical with a variety of that species which had been figured by Szajnocha from the Elobi Islands, situated off the north-west territory of the French Congo.

On some Psychodidae (Diptera: Nematocera) from Senegambia

1983 ◽  
Vol 14 (1) ◽  
pp. 98-100
Author(s):  
Rudiger Wagner
Keyword(s):  
New Species ◽  
West Africa ◽  
Tropical Africa ◽  
Small Collection ◽  
Clogmia Albipunctata ◽  
A New Species

AbstractA small collection of Psychodidae from Senegambia, West Africa, contained the following species: the cosmopolitans Tinearia alternata (Say), Psychoda parthenogenetica (Tonnoir), the tropicopolitan Clogmia albipunctata (Williston), Brunettia albonotata (Brunetti), common in tropical Africa and India, and a new species. Setomima senegambica n.sp., is described and compared with the already known species of the genus.

scholarly journals Successional trajectory of the fouling community on a tropical upwelling ecosystem in southeast Rio de Janeiro, Brazil

2015 ◽  
Vol 63 (2) ◽  
pp. 161-168 ◽  
Author(s):  
Bruno Pereira Masi ◽  
Ricardo Coutinho ◽  
Ilana Zalmon
Keyword(s):  
Rio De Janeiro ◽  
Percent Cover ◽  
Fouling Community ◽  
Mosaic Pattern ◽  
Underwater Photography ◽  
Seasonal Factor ◽  
Successional Trajectory ◽  
Successional Process ◽  
Fouling Organisms ◽  
Succession Model

Abstract The present study describes the successional trajectory of the fouling community in the upwelling region of Cabo Frio in southeastern Rio de Janeiro, Brazil. For 12 months, five PVC panels were sampled monthly by underwater photography to record the percent cover of fouling organisms, which allowed for the evaluation of the successional process through functional groups. The variability in the composition of the fouling community increased throughout the successional trajectory, creating a mosaic pattern. The identification of two associations after a year of observation, with one characterized by filamentous algae, Hydrozoa and Cirripedia and another mainly by articulated calcareous algae, shows that divergent trajectories can be observed even under the same environmental conditions. As an important seasonal factor of the local oceanographic characteristics, the upwelling events allowed for an environmental heterogeneity, and rejecting the classic orderly and directional succession model.

scholarly journals Fouling organisms on Perna perna mussels: is it worth removing them?

2007 ◽  
Vol 55 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Fabrício S. de Sá ◽  
Rosebel C. Nalesso ◽  
Karla Paresque
Keyword(s):  
Species Abundance ◽  
Perna Perna ◽  
Fouling Community ◽  
Bugula Neritina ◽  
Monthly Basis ◽  
Fouling Control ◽  
Eastern Brazil ◽  
Long Line ◽  
Perna Perna Mussel ◽  
Fouling Organisms

Perna perna mussel spat were suspended from ropes on a long-line cultivation, at Coqueiro´s Beach, Anchieta, South-eastern Brazil, in order to quantify the fouling community structure and its effects on growth and biomass of mussels. Half of the ropes had the fouling removed monthly, half had the foulingleft until the end of the experiment. Monthly samples of thirty mussels from each group were measured and their biomass determined. The fouling organisms were identified, quantified and their biomass evaluated on a monthly basis. After ten months, mussels on the cleaned treatment were significantly larger and heavier (ANOVA; P < 0.05; Bonferroni: unfouled > fouled), showing that fouling reduced mussel development. The most abundant epibiont organisms in terms of biomass were the algae Polysiphonia subtilissima (29%) and Ulva rigida (10.3%), followed by the bryozoans Bugula neritina (13.6%) and Perna perna spat (10.6%). Over 97 taxa and 42,646 individuals were identified, crustaceans being the most abundant group, predominantly one amphipod Cheiriphotis megacheles (12,980 ind.). Species abundance was positively correlated with algal biomass, revealing the influence of algae on vagile fauna, which provide both food and shelter. The benefits of fouling removal are discussed because the majority of species are important feeding items to fishes and yet, the costs of its fouling control added to the associated mussel spat loss make this fouling removal of questionable value.

scholarly journals Effects of structural factors on upwelling fouling community, Southeast Brazil

2016 ◽  
Vol 64 (4) ◽  
pp. 387-400 ◽  
Author(s):  
Bruno Pereira Masi ◽  
Ilana Zalmon ◽  
Ricardo Coutinho
Keyword(s):  
Community Composition ◽  
Contact Point ◽  
Fish Predation ◽  
Physical Factor ◽  
Structural Factors ◽  
Fouling Community ◽  
Digital Photograph ◽  
Successional Trajectory ◽  
One Year ◽  
Fouling Organisms

Abstract To assess the successional pattern of fouling organisms three hypotheses were tested: 1) a thermocline is caused by seasonal upwelling events, and therefore, depth influences the successional trajectory of the fouling community; 2) a reduction in the intensity of natural light of the substrate influences the fouling composition and the successional trajectory; 3) fish predation influences the community composition and its successional trajectory. During one year, up-facing and down-facing PVC panels on open, partially caged or fully caged, and placed at depths of 1.5 and 3.5 meters were monthly sampled by digital photograph to determine the community composition and by contact point to estimate the percent coverage of organisms. The upwelling impact provided different water masses, and light intensity was also a determining factor of the overall successional trajectory of the fouling community. After the installation of full and partial cages, differences were identified in the respective successional trajectories. The results of this study suggest that each physical factor or biological process can change the successional trajectory of the community, and the successional model (e.g., convergent, divergent, parallel, or cyclic) depends on the magnitudes of the determinants that act on the community at each stage of its trajectory.

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