Browsing Articles by Author "Bagøien, Espen"
Now showing items 1-13 of 13
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Asynchronized spawning responses of small pelaigic fish to a short-term enviromental change
Tiedemann, Maik; Ndour, Ismaïla; Sow, Fambaye Ngom; Bagøien, Espen; Krakstad, Jens-Otto; Ostrowski, Marek; Stenevik, Erling Kåre; Ensrud, Tor Magne; Isari, Stamatina (Peer reviewed; Journal article, 2022)We provide substantial evidence on how short-term changes in environmental conditions activate and deactivate spawning activities in small pelagic fishes. An ichthyoplankton survey was conducted along the southernmost part ... -
Blind dating—mate finding in planktonic copepods. I. Tracking the pheromone trail of Centropages typicus
Bagøien, Espen; Kiørboe, Thomas (Journal article; Peer reviewed, 2005-09-16)Mate-finding behaviour in the marine copepod Centropages typicus was investigated by 3-dimensional video analysis. Females leave a chemical trail in their wake and a male intercepting a fresh trail initiates a characteristic ... -
Blind dating—mate finding in planktonic copepods. II. The pheromone cloud of Pseudocalanus elongatus
Kiørboe, Thomas; Bagøien, Espen; Thygesen, Uffe Høgsbro (Journal article; Peer reviewed, 2005-09-16)Receptive females of Pseudocalanus elongatus, like many other planktonic copepods, produce pheromones to signal their presence and position to males, and thus enhance the rate of mate encounter. By means of 3D video ... -
Blind dating—mate finding in planktonic copepods. III. Hydromechanical communication in Acartia tonsa
Bagøien, Espen; Kiørboe, Thomas (Journal article; Peer reviewed, 2005-09-16)Mate-finding behaviour in the marine copepod Acartia tonsa was examined by video analysis. A. tonsa appears to depend on hydromechanical signals in the location of mates, detected at distances of up to 5 or 7 mm. Series ... -
Can predator avoidance explain varying overwintering depth of Calanus in different oceanic water masses?
Dale, Trine; Bagøien, Espen; Melle, Webjørn; Kaartvedt, Stein (Journal article; Peer reviewed, 1999-04-15)Distributions of overwintering Calanus spp. in the upper 1000 m in the Norwegian and Greenland Seas were studied in relation to hydrography, invertebrate predators and acoustic scattering layers (38 kHz). C, finmarchicus ... -
Climate effects on temporal and spatial dynamics of phytoplankton and zooplankton in the Barents Sea
Dalpadado, Padmini; Arrigo, Kevin R.; van Dijken, Gert L.; Skjoldal, Hein Rune; Bagøien, Espen; Dolgov, Andrey V.; Prokopchuk, Irina P.; Sperfeld, Erik (Peer reviewed; Journal article, 2020) -
Comparison of two multiple plankton samplers: MOCNESS and Multinet Mammoth
Strand, Espen; Broms, Cecilie Thorsen; Bagøien, Espen; Knutsen, Tor; Arnesen, Hilde; Mozfar, Bahar (Peer reviewed; Journal article, 2022)To ensure an optimal continuation of a long time series of zooplankton monitoring surveys, two types of equipment for depth-stratified mesozooplankton sampling were compared. The Institute of Marine Research (Norway) has ... -
Diversity and seasonal development of large zooplankton along physical gradients in the Arctic Barents Sea
Engeland, Tom Van; Bagøien, Espen; Wold, Anette; Cannaby, Heather Anne; Majaneva, Sanna Kristiina; Vader, Anna; Rønning, Jon S.; Handegard, Nils Olav; Dalpadado, Padmini; Ingvaldsen, Randi Brunvær (Peer reviewed; Journal article, 2023)Due to ongoing climate change, a new Arctic Ocean ecosystem is emerging. Within the framework of the Nansen Legacy project, we investigated the community composition of the large zooplankton and its seasonal development ... -
The record-warm Barents Sea and 0-group fish response to abnormal conditions
Eriksen, Elena; Bagøien, Espen; Strand, Espen; Primicerio, Raul; Prokhorova, Tatiana; Trofimov, Alexander; Prokopchuk, Irina (Peer reviewed; Journal article, 2020)The Barents Sea is a nursery area for many commercially and ecologically important fish stocks, and this whole region is presently subject to rapid climatic change from a cold period in the 1980s to a record warm period ... -
Seasonal and interannual variability in abundance and population development of Calanus finmarchicus at the western entrance to the Barents Sea, 1995–2019
Skjoldal, Hein Rune; Aarflot, Johanna Myrseth; Bagøien, Espen; Skagseth, Øystein; Rønning, Jon S.; Lien, Vidar Suren (Peer reviewed; Journal article, 2021)Data on copepodid abundance and stage composition of Calanus finmarchicus was collected with seasonal resolution (5–6 times a year) from four stations along an oceanographic transect across the western Barents Sea Opening ... -
Seasonal plankton dynamics along a cross-shelf gradient
Stenseth, Nils Christian; Llope, Marcos; Anadón, Ricardo; Ciannelli, Lorenzo; Chan, Kung-Sik; Hjermann, Dag Ø.; Bagøien, Espen; Ottersen, Geir (Journal article; Peer reviewed, 2006-08-08)Much interest has recently been devoted to reconstructing the dynamic structure of ecological systems on the basis of time-series data. Using 10 years of monthly data on phyto- and zooplankton abundance from the Bay of ... -
Spatial distributions and seasonality of four Calanus species in the Northeast Atlantic
Strand, Espen; Bagøien, Espen; Edwards, Martin; Broms, Cecilie; Klevjer, Thor A. (Peer reviewed; Journal article, 2020)This paper analyses spatial and seasonal patterns for near-surface abundances of four Calanus species in the Northeast Atlantic based on monthly Continuous Plankton Recorder (CPR) Survey data collected during 2008–2016. ... -
Temporal Variability of Co-Occurring Calanus finmarchicus and C. helgolandicus in Skagerrak
Falkenhaug, Tone; Broms, Cecilie; Bagøien, Espen; Nikolioudakis, Nikolaos (Peer reviewed; Journal article, 2022)The congeneric copepods Calanus finmarchicus and C. helgolandicus co-occur in the northern North Sea and Skagerrak where they play important roles as prey for higher trophic levels. This study analyses a 26-year time series ...