Biologiske ressurser i området som er aktuelt som trasé for kraftkabler fra Norge til kontinentet

Rapporten er utarbeidet på oppdrag fra Statkraft Engineering, i anledning planleggingen av linjenett for overføring av elektrisk kraft fra Norge til kontinentet. Utredningen er en del av arbeidet med å vurdere konsekvensene for marine biologiske ressurser ved overføring av elektrisk kraft i monopol likestrømskabel. Rapporten er en sammenstillelse av kunnskap om biologiske ressurser i området som er aktuellt for elektrodeanlegg og kabel. Det er gitt en beskrivelse samt kartmessig framstilling av utbredelse av viktige fiskebestander i området, samt migasjon av fisk gjennom det aktuelle området

withdrawn 2017 hrs ehra ecas aphrs solaece expert consensus statement on catheter and surgical ablation of atrial fibrillation

n/

Atlantic observation of Calanus marshallae (Copepoda; Calanoida)

An observation of Calanus marshallae Frost, 1974, on the Atlantic side of the Polar Ocean is reported. Copepods were identified by comparing nucleotide sequences of mitochondrial 16S ribosomal RNA with a previously reported sequence from the Pacific region. Presence of the species in the Barents Sea may explain multi-modal length distributions previously obtained in the region. Potential implications for future identification of Calanus spp, in this region are discussed

Population genetic structure of wrasses used as cleanerfish in Atlantic salmon farming in Norway

The increasing use of wrasses as cleaner fish in the salmon farming industry has created local fishery in many regions in Norway. In several cases, live fish have been transported between regions without knowledge of the population structure of the three species in question (goldsinny, Ctenolabrus rupestris, rock cook, Crenolabrus exoletus, and corkwing, Symphodus melops ). Genetic studies based on variation in proteins were carried out, and polymorphic enzymes of potential use in popoulation studies were identified for all three species. For the most common wrasse the goldsinny, four loci (SDH-1*; PGM- 1*; GPI-1* and GPI-2*) were used to study genetic variation between geographic regions. Five samples collected in the southern part of Norway were compared and significant variation in allele frequencies were detected for SDH-1* and PGM-1*. The variation seemed to be associated with specific fjord - coastal area distribution

A brief literature review of Hediste diversicolor (MüIler, 1776)

Around 1940, the polychaete ragworm Hediste diversicolor (Muller, 1776) (formerly Nereis diversicolor) was imported to Caspian Sea from the Azov Sea in the Berdyansk region (Ukraine ). Soon the species became established over a large area along the Caspian Sea coast. Then, after 1995, the species was found at offshore oil production locations approximately 30 km off the coast. The questions are: bow did the species spread out to the offshore locations, and could this colonisation at the offshore locations possibly represent any environmental concern? The present report includes a brief review of the available knowledge related to the biology of this ragworm species. Our objective is to provide a collection of knowledge which can assist the process of addressing the above noted questions. Based on the reviewed information we also suggest in short bow this topic should be approached in terms of practical surveys. I.e., the very first topic which needs to be clarified is whether or not H. diversicolor populations are present in the area between the shore locations and the offshore platform locations. Since the species has a lirnited dispersal capacity a gap in presence would indicate that the dispersal out to the offshore locations has been assisted by human actions, and we would in that case initially consider ballast water in tankers to be the most likely vehicle for species dispersal. Furthermore, a full elucidation of such a dispersal process is possible, and would best be obtained by means of using analyses of population specific molecular markers in representative polychaete samples collected from each of the populations studied (offshore and coastal). Lists of expert and expert laboratories which have competence within these analyses are included in the present report.Akvamiljø Caspia

Egg masses of the squid Gonatus fabricii (Cephalopoda, Gonatidae) caught with pelagic trawl off northern Norway

A description of egg masses from Gonatus frabricii (Lichtenstein) caught with pelagic trawl in the Norwegian Sea is given. The eggs were kept together in a single layer between two mucous membranes, and the pieces collected appeared to be fragments of more extensive structures torn apart by wear from the sampling gear. No embryos were observed in the eggs, and none of the eggs showed any staining for five enzyme systems analyzed by isoelectric focusing. Either the eggs were caught shortly after spawning and fertilization, or the lack of embryonic tissue reflects the fact that most of the eggs were caught in water colder than 0°C. The development rate at this temperature is expected to be very slow

Measurement of naphthenic acids in the receiving waters around an offshore oil platform by passive sampling

Polar organic chemical integrative samplers (POCIS) were deployed in the vicinity of an offshore oil installation and analyzed for naphthenic acids (NAs). The POCIS accumulated a range of mono‐ to tetracyclic NAs, with different degrees of alkylation, with monocyclic acids being the most abundant. Currently, POCIS or similar polar samplers may be the only way to measure exposure to NAs from offshore discharges in situ. In addition, they may be a valuable tool for monitoring similar organic acids in general

Measurement of naphthenic acids in the receiving waters around an offshore oil platform by passive sampling

Polar organic chemical integrative samplers (POCIS) were deployed in the vicinity of an offshore oil installation and analyzed for naphthenic acids (NAs). The POCIS accumulated a range of mono‐ to tetracyclic NAs, with different degrees of alkylation, with monocyclic acids being the most abundant. Currently, POCIS or similar polar samplers may be the only way to measure exposure to NAs from offshore discharges in situ. In addition, they may be a valuable tool for monitoring similar organic acids in general

Measurement of naphthenic acids in the receiving waters around an offshore oil platform by passive sampling

Polar organic chemical integrative samplers (POCIS) were deployed in the vicinity of an offshore oil installation and analyzed for naphthenic acids (NAs). The POCIS accumulated a range of mono‐ to tetracyclic NAs, with different degrees of alkylation, with monocyclic acids being the most abundant. Currently, POCIS or similar polar samplers may be the only way to measure exposure to NAs from offshore discharges in situ. In addition, they may be a valuable tool for monitoring similar organic acids in general