Browsing NTNU Open by Author "Hagemann, Andreas"
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Biochemical composition of Hediste diversicolor (OF Müller, 1776) (Annelida: Nereidae) reared on different types of aquaculture sludge
Anglade, Inka; Dahl, Thomas; Kristensen, Bjørn; Hagemann, Andreas; Malzahn, Arne; Reitan, Kjell Inge (Peer reviewed; Journal article, 2023)Introduction: Sustainable growth of the salmon aquaculture industry is highly dependent on the availability of new feed resources as well as improved management and utilization of waste streams from production. Polychaetes ... -
Biofouling on salmon pen nets and cleaner fish shelters does not harbor planktonic stages of sea lice
Jevne, Lone Sunniva; Øvrelid, Margrete Slåtsve; Hagemann, Andreas; Bloecher, Nina; Steinhovden, Kristine; Båtnes, Anna Solvang; Olsen, Yngvar; Reitan, Kjell Inge (Peer reviewed; Journal article, 2020)The objective of the current study was to determine the extent to which planktonic sea lice (Lepeophtheirus salmonis Krøyer, 1838 and Caligus elongatus Nordmann, 1832) were present in the biofouling on open-sea net pens ... -
Can lipidomics help identifying egg quality in ballan wrasse?
Malzahn, Arne; Sarno, Antonio; Hagemann, Andreas; Farkas, Julia; Musialak, Luciana Alves; Kjørsvik, Elin; Hansen, Bjørn Henrik (Peer reviewed; Journal article, 2022)Ballan wrasse (Labrus bergylta) is in the limelight of aquaculture research due to the species role as cleaner fish in salmon aquaculture. A major drawback is that the salmon industry still depends on wild caught fish as ... -
Cold storage of eggs of Acartia tonsa Dana: effects of light, salinity and short-term temperature elevation on 48-h egg hatching success
Hagemann, Andreas (Master thesis, 2011)Copepods play a key role in the marine ecosystem where they form a vital trophodynamic link between primary and tertiary producers, and are the dominant prey of many marine fishes during their larval stage. Because of their ... -
Degumming of Ballan wrasse (Labrus bergylta) eggs
Shabbir, Fahad (Master thesis, 2022)Etterspørselen etter berggylt (Labrus bergylta) har økt gjennom årene på grunn av dens effektivitet som rensefisk for å fjerne lakselus (Lepeophtheirus salmonis) fra oppdrettslaks (Salmo salar) i merder. En av utfordringene ... -
Effects of different live feeding regimes on the development and lipid composition of ballan wrasse (Labrus bergylta) larvae
García-Calvo, Laura (Master thesis, 2024)Lakselus (Lepeophtheirus salmonis) utgjør en av de største utfordringene for utvidelsen av norsk lakseoppdrett, og påvirker produksjonen, fiskevelferden og villaksbestandene negativt. Effektiviteten til både kjemiske og ... -
Effects of temperature, salinity and diet on embryonic and early larval development in Littorina littorea (Gastropoda: Littorinimorpha)
Lillebjerka, Tora; Malzahn, Arne; Kjørsvik, Elin; Hagemann, Andreas (Peer reviewed; Journal article, 2023)Introduction: The common periwinkle Littorina littorea is a delicacy in southern Europe. Enabling aquaculture production would be measure to avoid future over-harvesting and ensure a constant market supply. Methods: ... -
Effects on the survival and development of Acartia tonsa fed different Rhodomonas species cultivated on different nitrogen concentrations
Johannesen, Unn Vagnsdóttir (Master thesis, 2018)Marine larvae need a live feed with a high amount of PUFA especially EPA and DHA to have a healthy development. Copepods are the preferred choice of live feed since they are there natural food source and have the right ... -
Embryonic and larval development in the semelparous Nereid polychaete Hediste diversicolor (OF Müller, 1776) in Norway: Challenges and perspectives
Wang, Haiqing; Hagemann, Andreas; Reitan, Kjell Inge; Uhre, Marianne; Malzahn, Arne (Peer reviewed; Journal article, 2020)Knowledge of broodstock manipulation, gametogenesis, artificial fertilization and larval nutrition is a prerequisite to reach a large‐scale production of the polychaete Hediste diversicolor. In this study, the characteristics ... -
Embryonic and larval development in the semelparous Nereid polychaete Hediste diversicolor (OF Müller, 1776) in Norway: Challenges and perspectives
Wang, Haiqing; Hagemann, Andreas; Reitan, Kjell Inge; Uhre, Marianne; Malzahn, Arne (Peer reviewed; Journal article, 2020)Knowledge of broodstock manipulation, gametogenesis, artificial fertilization and larval nutrition is a prerequisite to reach a large‐scale production of the polychaete Hediste diversicolor. In this study, the characteristics ... -
First feed matters: The first diet of larval fish programmes growth, survival, and metabolism of larval ballan wrasse (Labrus bergylta)
Malzahn, Arne; Ribicic, Deni; Hansen, Bjørn Henrik; Sarno, Antonio; Kjørsvik, Elin; Aase, Anna Sigrid Nordberg; Alves Musialak, Luciana; Garcia Calvo, Laura; Hagemann, Andreas (Peer reviewed; Journal article, 2022)The use of cleaner fish, such as the ballan wrasse (Labrus bergylta), is important for combatting the sea lice problem in salmonid cage farming. Ballan wrasse is the only wrasse species that is cultivated, though only about ... -
Growth and nutritional composition of the polychaete Hediste diversicolor (OF Müller, 1776) cultivated on waste from land-based salmon smolt aquaculture
Wang, Haiqing; Seekamp, Inka; Malzahn, Arne; Hagemann, Andreas; Carvajal, Ana Karina; Slizyte, Rasa; Standal, Inger Beate; Handå, Aleksander; Reitan, Kjell Inge (Journal article; Peer reviewed, 2019)Increased aquaculture production will result in increased amounts of waste produced, and these wastes are highly underexploited. Polychaetes might effectively consume such waste and transfer them into compounds as marine ... -
Growth, survival and liver histology in lumpfish (Cyclopterus lumpus) larvae fed different start-feeding diets (Artemia, copepods, cirripeds and formulated diet)
Kværnø, Sunniva Brevik (Master thesis, 2022)Den norske produksjonen av atlantisk laks (Salmo salar) har siden 2012 vært stabil, hovedsakelig på grunn av problemer med lakselus (Lepeophtheirus salmonis). For å bekjempe lusa har det blitt satt ut lusespisende rensefisk ... -
Investigating development, incubation and dietary effects in egg and veliger larvae of Littorina littorea (Linnaeus, 1758)
Lillebjerka, Tora (Master thesis, 2022)Vanlig Strandsnegl (Littorina littorea) er en lite utnyttet delikatesse i Norge, men arten sankes, eksporteres og konsumeres i mange europeiske land. Denne studien har undersøkt noen av de tidligere ukjente faktorene som ... -
Lipids and fatty acids development in lumpfish (Cyclopterus lumpus) larvae fed with different start feeding diets (Artemia, cirripedia, copepod (Acartia tonsa) and formulated diet
Akbar, Saba (Master thesis, 2022)Salmon lice (Lepeophtheirus salmonis) infestations on Salmonids (Salmo salar) in cages has brought Norwegian aquaculture to a stable production since 2012. Many chemotherapeutic , chemical, and mechanical approaches have ... -
Microbial characterization and influence on copepod (Acartia tonsa) nauplii and egg production in water treatment systems with and without membrane filtration
Phan Hung, Anh (Master thesis, 2014)Acartia tonsa is a pelagic calanoid copepod with a diverse distribution, a wide tolerance of temperature and salinities, has short generation time, can produce resting eggs, and has been considered as an excellent feed for ... -
Nutrient (C, N and P) budgets of Hediste diversicolor (OF Müller, 1776) fed salmon smolt sludge
Sæther, Håkon Olai Ellingsen (Master thesis, 2022)Norge er verdens største produsent av atlantisk laks (Salmo salar), med en årlig produksjon på omtrent 1.3 millioner tonn. Med matproduksjon på denne skalaen oppstår det store mengder med næringsforurensning i form av ... -
Nutritional condition of ballan wrasse (Labrus bergylta) larvae reared on different live feed diets – an investigation of gut and liver histology
Aase, Anna Sigrid Norberg (Master thesis, 2022)Lakselusproblematikk fortsetter å være den største hindringen for fortsatt vekst i den norske laksenæringen, hvor mange avlusningsoperasjoner blir gjennomført hvert år for å holde lusetallene nede. Bruk av berggylt som en ... -
OC2017 A-029 - Vannkvalitet og startfôring av rognkjeks - Effekt av fôring med levende copepoder i tidlige faser (FHF prosjekt nr 901174)
Dahle, Stine Veronica Wiborg; Hagemann, Andreas; Attramadal, Kari; Kjørsvik, Elin; Bardal, Tora (Research report, 2017)I oppdrett av rognkjeks benyttes fonnulert tønfor av små partikler fra start, som gir mye forspill i karene. Høy og varierende organisk belastning i systemet gir grobunn for oppblomstring av opportunistiske bakterier ... -
Ova lipid profiling and egg quality in wild and captive lumpfish, Cyclopterus lumpus (Linnaeus, 1758)
Hansen, Bjørn Henrik; Kjørsvik, Elin; Malzahn, Arne; Sarno, Antonio; Kulild, Ole Martin; Farkas, Julia; Nordtug, Trond; Rye, Rebecca; Kvæstad, Bjarne; Lein, Ingrid; Hagemann, Andreas (Peer reviewed; Journal article, 2022)Lumpfish (Cyclopterus lumpus) serves an important role as cleaner fish for removing salmon lice in salmon aquaculture. For this use, cultivated lumpfish are preferred over wild-caught fish to avoid overexploitation of ...