Acoustic Monitoring of Marine Mammals around Offshore Platforms in the North Sea and Impact Assessment of Noise from Drilling Activities

2010 ◽  
Author(s):  
Steffen Sanvig Bach ◽  
Henrik Skov ◽  
Werner Piper
Keyword(s):  
Impact Assessment ◽  
North Sea ◽  
Marine Mammals ◽  
Acoustic Monitoring ◽  
Offshore Platforms ◽  
The North ◽  
The North Sea

Status of marine mammals in the North sea

1990 ◽  
Vol 26 (2-4) ◽  
pp. 427-435 ◽  
Author(s):  
P.J.H. Reijnders ◽  
K. Lankester
Keyword(s):  
North Sea ◽  
Marine Mammals ◽  
The North ◽  
The North Sea

Sources and Fate of PCBs in the North Sea: A Review of Available Data

1991 ◽  
Vol 24 (10) ◽  
pp. 77-85 ◽  
Author(s):  
J. Klamer ◽  
R. W. P. M. Laane ◽  
J. M. Marquenie
Keyword(s):  
Adverse Effects ◽  
North Sea ◽  
German Bight ◽  
Marine Mammals ◽  
Wadden Sea ◽  
Annual Basis ◽  
The North ◽  
Total Input ◽  
Seal Population ◽  
The North Sea

From literature data it is calculated that on an annual basis, 11 to 17 tonnes of PCBs enter the North Sea. Largest sources are the Atlantic Ocean and the atmosphere: together they account for 60-79% of the total input. Sources with greatest impact are the rivers, sewers and sludge. Highest concentrations are found close to the Dutch shore and in the German Bight. The PCB levels result in adverse effects on the seal population in the Wadden Sea. Of the total world PCB production, at least 57% is still in use and their future dispersal into the oceans cannot easily be controlled. If the increase in ocean PCB concentration continues, it may ultimately result in the extinction of fish-eating marine mammals.

Underreamed Footings Support Offshore Platforms In The North Sea

1973 ◽  
Author(s):  
Clarence J. Ehlers ◽  
William R. Bowles
Keyword(s):  
North Sea ◽  
Offshore Platforms ◽  
The North ◽  
The North Sea

Bite marks on early Holocene Tursiops truncatus fossils from the North Sea indicate scavenging by rays (Chondrichthyes, Rajidae)

2009 ◽  
Vol 88 (3) ◽  
pp. 169-175
Author(s):  
H.H. van Netten ◽  
J.W.F. Reumer
Keyword(s):  
Natural History ◽  
North Sea ◽  
Tursiops Truncatus ◽  
Marine Mammals ◽  
Real Life ◽  
Early Holocene ◽  
History Museum ◽  
Bite Marks ◽  
The North ◽  
The North Sea

AbstractA number of Tursiops truncatus mandibles in the collection of fossil marine mammals in the Rotterdam Natural History Museum have marks consisting of several parallel linear grooves. These marks are also found on four atlas complexes, a scapula and on one vertebra. The hypothesis that they are bite marks and were caused by scavenging rays (Rajidae, Chondrichthyes) was tested with a real-life experiment using different shark and ray species, allowing them to scavenge on cow ribs as proxies for the dolphin bones. The bite marks of these animals were compared with the fossil marks and show that the fossil marks are most likely caused by scavenging rays.

Long-term dynamics of fouling communities found on offshore installations in the North Sea

2003 ◽  
Vol 83 (5) ◽  
pp. 897-901 ◽  
Author(s):  
P. Whomersley ◽  
G.B. Picken
Keyword(s):  
North Sea ◽  
Offshore Platforms ◽  
Fouling Communities ◽  
The North ◽  
Offshore Installations ◽  
Oil Export ◽  
The North Sea ◽  
Northern North Sea ◽  
Fouling Organisms

Inspection videos of four offshore platforms in the central and northern North Sea were used to study the development of fouling communities on clamps and guides of oil export risers over an 11-y period (1989–2000). Results from multivariate analyses (multi-dimensional scaling and analysis of similarities) indicated that distinct assemblages developed in different geographical locations. These differences were mainly due to the protracted development of theMetridium senile(Cnidaria: Actinaria) zone on the northern sector platforms. The vertical zonation of fouling organisms was similar on all installations, although the water depth at platform locations varied from 80 to 169 m, indicating that fouling organisms display a wide bathymetric tolerance. This study has highlighted the value of long-term data present in operational inspection videos for the study of fouling communities.

Echinoderms as Bioindicators, Bioassays, and Impact Assessment Tools of Sediment-Associated Metals and PCBs in the North Sea

2003 ◽  
Vol 45 (2) ◽  
pp. 190-202 ◽  
Author(s):  
G. Coteur ◽  
P. Gosselin ◽  
P. Wantier ◽  
Y. Chambost-Manciet ◽  
B. Danis ◽  
...  
Keyword(s):  
Impact Assessment ◽  
North Sea ◽  
Assessment Tools ◽  
The North ◽  
The North Sea

scholarly journals Decommissioning Plans for Fixed Offshore Platforms: A Brief Revision

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Marcio Soares Pinheiro ◽  
Paulo Roberto Duailibe Monteiro
Keyword(s):  
North Sea ◽  
Rio De Janeiro ◽  
The State ◽  
Oil Field ◽  
Offshore Platforms ◽  
The North ◽  
Campos Basin ◽  
Heavy Lift ◽  
Long Time ◽  
The North Sea

Brazil began to explore its seas in the 60’s of the XX Century looking for petroleum. This journey began in the Northeast and the first oil field produced offshore was the Guaricema Field, in the State of Sergipe. During the 70’s, Petrobrás found oil in the Campos Basin, between the States of Espírito Santo and Rio de Janeiro, that became the most important oil province in Brazil until the discovery of the Pre-Salt province, in the Santos Basin. As these fields are producing for a long time, many of them are already completely depleted or their production is in way of to be not commercial anymore, and their facilities need to be decommissioned. This review of decommissioning practices of fixed offshore platforms carried out worldwide has focus on the removal of topside with special vessels designed for this purpose or with conventional methods (crane vessels + barge). It will show the benefits of using specialised heavy lift vessels to remove the topsides and move it to shore for dismantling / recycling / reuse / disposal. The cases for study were the successful decommissioning projects in the North Sea: Brent B/D, Valhall QP, Viking, Curlew, Eider A, Golden Eye and Leman, Iwaki-Oki, Halfweg Q1, Yme and Ninian North.

Benthic monitoring of oil and gas offshore platforms in the North Sea using environmental DNA metabarcoding

2020 ◽  
Author(s):  
Florian Mauffrey ◽  
Tristan Cordier ◽  
Laure Apothéloz‐Perret‐Gentil ◽  
Kristina Cermakova ◽  
Thomas Merzi ◽  
...  
Keyword(s):  
North Sea ◽  
Oil And Gas ◽  
Environmental Dna ◽  
Offshore Platforms ◽  
The North ◽  
Dna Metabarcoding ◽  
The North Sea
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