Browsing Articles by Author "Agnalt, Ann-Lisbeth"
Now showing items 1-17 of 17
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A first fecundity study of the female snow crab Chionoecetes opilio Fabricius, 1788 (Decapoda: Brachyura: Oregoniidae) of the newly established population in the Barents Sea
Danielsen, Hanna Ellerine Helle; Hjelset, Ann Merete; Bluhm, Bodil; Hvingel, Carsten; Agnalt, Ann-Lisbeth (Journal article; Peer reviewed, 2019)The snow crab Chionoecetes opilioFabricius, 1788 is a newly established species in the Barents Sea. Since the first individuals were recorded in 1996, the population has increased and a fishery was initiated in 2012. Mature ... -
An enriched environment promotes shelter-seeking behaviour and survival of hatchery-produced juvenile European lobster (Homarus gammarus)
Aspaas, Stian; Grefsrud, Ellen Sofie; Fernø, Anders; Jensen, Knut Helge; Trengereid, Henrik; Agnalt, Ann-Lisbeth (Journal article, 2016) -
Deformities in larvae and juvenile European lobster (Homarus gammarus) exposed to lower pH at two different temperatures
Agnalt, Ann-Lisbeth; Grefsrud, Ellen Sofie; Farestveit, Eva; Larsen, Marita; Keulder, Felicia (Journal article; Peer reviewed, 2013-12-04)The ongoing warming and acidification of the world's oceans are expected to influence the marine ecosystems, including benthic marine resources. Ocean acidification may especially have an impact on calcifying organisms, ... -
Effect of sea lice chemotherapeutant hydrogen peroxide on the photosynthetic characteristics and bleaching of the coralline alga Lithothamnion soriferum
Legrand, Erwann; Parsons, Aoife Elizabeth; Escobar, Rosa; Freytet, Florian; Agnalt, Ann-Lisbeth; Samuelsen, Ole Bent; Husa, Vivian (Peer reviewed; Journal article, 2022)The proliferation of sea lice (Lepeophtheirus salmonis) represents a major challenge for the salmonid aquaculture industry in Norway. Hydrogen peroxide (H2O2) is a chemotherapeutant frequently used on Norwegian farms, ... -
Egg buoyancy variability in local populations of Atlantic cod (Gadus morhua)
Jung, Kyung-Mi; Folkvord, Arild; Kjesbu, Olav Sigurd; Agnalt, Ann-Lisbeth; Thorsen, Anders; Sundby, Svein (Journal article; Peer reviewed, 2012-06-29)Previous studies have found strong evidences for Atlantic cod (Gadus morhua) egg retention in fjords, which are caused by the combination of vertical salinity structure, estuarine circulation, and egg specific gravity, ... -
The impact of anti-sea lice pesticides, azamethiphos and deltamethrin, on European lobster (Homarus gammarus) larvae in the Norwegian marine environment
Parsons, Aoife Elizabeth; Escobar, Rosa; Sævik, Pål Næverlid; Samuelsen, Ole Bent; Agnalt, Ann-Lisbeth (Peer reviewed; Journal article, 2020)Anti-sea lice pesticides, used in the salmonid aquaculture industry, are a growing environmental concern due to their potential to adversely affect non-target crustaceans. Azamethiphos and deltamethrin are two bath treatment ... -
Modelled dispersal of snow crab (Chionoecetes opilio) larvae and potential settlement areas in the western Barents Sea
Huserbråten, Mats Brockstedt Olsen; Hjelset, Ann Merete; Danielsen, Hanna Ellerine Helle; Hvingel, Carsten; Agnalt, Ann-Lisbeth (Peer reviewed; Journal article, 2023)Since the mid-1990s, a snow crab (Chionoecetes opilio) population has established in the eastern Barents Sea. Spawning females and newly hatched larvae are now also found in the central Barents Sea, warranting speculations ... -
Modelling chemical releases from fish farms: impact zones, dissolution time, and exposure probability
Sævik, Pål Næverlid; Agnalt, Ann-Lisbeth; Samuelsen, Ole Bent; Myksvoll, Mari Skuggedal (Peer reviewed; Journal article, 2021)Tarpaulin bath treatments are used in open net-pen finfish aquaculture to combat parasitic infections, in particular sea lice. After treatment, the toxic wastewater is released directly into the ocean, potentially harming ... -
Mortality and deformities in European lobster (Homarus gammarus) juveniles exposed to the anti-parasitic drug teflubenzuron
Samuelsen, Ole Bent; Lunestad, Bjørn T.; Farestveit, Eva; Grefsrud, Ellen Sofie; Hannisdal, Rita; Holmelid, Bjarte; Tjensvoll, Tore; Agnalt, Ann-Lisbeth (Journal article; Peer reviewed, 2014-02-04)This study describes experiments carried out to examine effects of the antiparasitic drug teflubenzuron, used in delousing farmed salmon, on a non-target species, the European lobster (Homarus gammarus). Juvenile lobsters ... -
Mortality and reduced photosynthetic performance in sugar kelp Saccharina latissima caused by the salmon-lice therapeutant hydrogen peroxide
Haugland, Barbro Taraldset; Rastrick, Samuel; Agnalt, Ann-Lisbeth; Husa, Vivian; Kutti, Tina; Samuelsen, Ole Bent (Journal article; Peer reviewed, 2019)Sugar kelp Saccharina latissima is one of the dominating kelp species on sheltered sublittoral sites along the Norwegian coastline, providing important habitats and ecosystem services. In finfish aquaculture in Norway, ... -
Mortality in the rockpool shrimp Palaemon elegans following long-term exposure to low doses of the anti-parasitic drug Teflubenzuron
Samuelsen, Ole Bent; Parsons, Aoife; Agnalt, Ann-Lisbeth; Tjensvoll, Tore; Lunestad, Bjørn Tore; Hannisdal, Rita (Peer reviewed; Journal article, 2020)Anti-parasitic drugs used to control sea lice infestations in the salmonid aquaculture industry are a growing environmental concern due to their potential impacts on non-target crustacean species. This study examined the ... -
Recorded captures of American lobster (Homarus Americanus) in Swedish waters and an observation of predation on the European lobster (Homarus Gammarus)
Øresland, Vidar; Ulmestrand, Mats; Agnalt, Ann-Lisbeth; Oxby, Gert (Peer reviewed; Journal article, 2017) -
Short-term exposure to hydrogen peroxide induces mortality and alters exploratory behaviour of European lobster (Homarus gammarus)
Escobar, Rosa; Parsons, Aoife Elizabeth; Samuelsen, Ole Bent; Agnalt, Ann-Lisbeth (Peer reviewed; Journal article, 2020)Bath treatment chemotherapeutants, used to control sea lice infestations in the salmonid aquaculture industry, are released directly into the marine environment around fish farms and pose a serious risk to non-target ... -
Snow crab (Chionoecetes opilio), a new food item for North-east Arctic cod (Gadus morhua) in the Barents Sea
Holt, Rebecca Emma; Hvingel, Carsten; Agnalt, Ann-Lisbeth; Dolgov, Andrey V.; Hjelset, Ann Merete; Bogstad, Bjarte (Peer reviewed; Journal article, 2021)The snow crab (Chionoecetes opilio) is a newly established species in the Barents Sea, increasing in both distribution and abundance in recent years. We explore the potential importance of North-east Arctic cod (Gadus ... -
Taxonomic and genetic confirmed findings of snow crab (Chionoecetes opilio) larvae in the Barents Sea
Hjelset, Ann Merete; Danielsen, Hanna Ellerine Helle; Westgaard, Jon-Ivar; Agnalt, Ann-Lisbeth (Peer reviewed; Journal article, 2021)The snow crab (Chionoecetes opilio) is an Arctic cold-water species native to the northwestern Atlantic Ocean and the northern Pacific Ocean. During the recent decades, a population has established in the Barents Sea. ... -
Training camp—A way to improve survival in European lobster juveniles?
Agnalt, Ann-Lisbeth; Grefsrud, Ellen Sofie; Farestveit, Eva; Jørstad, Knut Eirik (Peer reviewed; Journal article, 2017) -
Wrasse (Labridae) as cleaner fish in salmonid aquaculture – The Hardangerfjord as a case study
Skiftesvik, Anne Berit; Blom, Geir; Agnalt, Ann-Lisbeth; Durif, Caroline M.F.; Browman, Howard I.; Bjelland, Reidun M.; Harkestad, Lisbeth S.; Farestveit, Eva; Paulsen, Ole Ingar; Fauske, Merete; Havelin, Trond; Johnsen, Knut; Mortensen, Stein (Journal article; Peer reviewed, 2013-10-15)Several species of wrasse (Labridae) are used as cleaner fish to remove salmon lice from farmed Atlantic salmon. We estimated the fishery and use of wrasse in Hardangerfjord. The estimated numbers of labrids used on salmon ...