Blar i Brage IMR på forfatter "Tiedemann, Maik"
-
An appraisal of the drivers of Norwegian spring‐spawning herring (Clupea harengus) recruitment
Garcia, Théo; Planque, Benjamin; Arneberg, Per; Bogstad, Bjarte; Skagseth, Øystein; Tiedemann, Maik (Peer reviewed; Journal article, 2020) -
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 ... -
Drift indices confirm that rapid larval displacement is essential for recruitment success in high-latitude oceans
Tiedemann, Maik; Slotte, Aril; Nash, Richard David Marriott; Stenevik, Erling Kåre; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2021)Larval drift is a key process for successful fish recruitment. We used Norwegian spring-spawning herring (Clupea harengus) as model species to investigate the relationship between larval drift and recruitment. Larval drift ... -
Environmental influences on Norwegian spring-spawning herring (<i>Clupea harengus</i> L.) larvae reveal recent constraints in recruitment success
Tiedemann, Maik; Nash, Richard David Marriott; Stenevik, Erling Kåre; Stiasny, Martina, H.; Slotte, Aril; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2020)The lack of any abundant recruiting year class of Norwegian spring-spawning (NSS) herring between 2005 and 2015 contributed to an approximate reduction of 40% in the spawning-stock biomass since 2009, i.e. from 7 to 4 ... -
Fine-scale vertical structure of sound-scattering layers over an east border upwelling system and its relationship to pelagic habitat characteristics
Ndague, Diogoul; Brehmer, Patrice; Perrot, Yannick; Tiedemann, Maik; Thiam, Abou; El Ayoubi, Salaheddine; Mouget, Anne; Migayrou, Chloé; Sadio, Oumar; Sarre, Abdoulaye (Peer reviewed; Journal article, 2020)Understanding the relationship between sound-scattering layers (SSLs) and pelagic habitat characteristics is a substantial step to apprehend ecosystem dynamics. SSLs are detected on echo sounders representing aggregated ... -
Half a century of high-latitude fisheries oceanography research on the "recruitment problem" in Northeast Arctic cod (Gadus morhua)
Kjesbu, Olav Sigurd; Tiedemann, Maik; Alix, Maud; Thorsen, Anders; Sundby, Svein (Peer reviewed; Journal article, 2023)Predicting recruitment in a reliable fashion is a great challenge within operational fisheries advice. Here, we consulted the unique but undercommunicated IMR Cod Larva Project (1975–1990), its spin-offs, placed in an ... -
Highly mixed impacts of near-future climate change on stock productivity proxies in the North East Atlantic
Kjesbu, Olav Sigurd; Sundby, Svein; Sandø, Anne Britt; Alix, Maud; Hjøllo, Solfrid Sætre; Tiedemann, Maik; Skern-Mauritzen, Mette; Junge, Claudia; Fossheim, Maria; Broms, Cecilie; Søvik, Guldborg; Zimmermann, Fabian; Nedreaas, Kjell Harald; Eriksen, Elena; Höffle, Hannes; Hjelset, Ann Merete; Kvamme, Cecilie; Reecht, Yves; Knutsen, Halvor; Aglen, Asgeir; Albert, Ole Thomas; Berg, Erik; Bogstad, Bjarte; Durif, Caroline; Halvorsen, Kim Aleksander Tallaksen; Høines, Åge Sigurd; Hvingel, Carsten; Johannesen, Edda; Johnsen, Espen; Moland, Even; Myksvoll, Mari Skuggedal; Nøttestad, Leif; Olsen, Erik Joel Steinar; Skaret, Georg; Skjæraasen, Jon Egil; Slotte, Aril; Staby, Arved; Stenevik, Erling Kåre; Stiansen, Jan Erik; Stiasny, Martina H.; Sundet, Jan Henry; Vikebø, Frode Bendiksen; Huse, Geir (Peer reviewed; Journal article, 2021)Impacts of climate change on ocean productivity sustaining world fisheries are predominantly negative but vary greatly among regions. We assessed how 39 fisheries resources—ranging from data-poor to data-rich stocks—in the ... -
Is it possible to photoperiod manipulate spawning time in planktivorous fish ? A long-term experiment on Atlantic herring
dos Santos Schmidt, Thassya Christina; Berg, Florian; Folkvord, Arild; Pires, Alessandra M.A.; Komyakova, Valeriya; Tiedemann, Maik; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2022)The oocyte development (vitellogenesis) of individual fish is highly dependent upon their physiology which is influenced by both intrinsic and extrinsic factors. Thus, if individuals encounter poor biophysical conditions, ... -
Quantitative molecular detection of larval Atlantic herring (Clupea harengus) in stomach contents of Atlantic mackerel (Scomber scombrus) marks regions of predation pressure
Allen, Bridie; Ray, Jessica Louise; Tiedemann, Maik; Komyakova, Valeriya; Vikebø, Frode Bendiksen; Skaar, Katrine Sandnes; Stiasny, Martina H.; Folkvord, Arild; Nash, Richard David Marriott; Stenevik, Erling Kåre; Kjesbu, Olav Sigurd (Peer reviewed; Journal article, 2021)Mortality rates in the early life-history stages of fishes are generally high yet identifying the causes remain unclear. Faltering recruitment rates of Atlantic herring (Clupea harengus) in the Norwegian Sea indicate a ... -
Spawning energetics and otolith microchemistry provide insights into the stock structure of bonga shad Ethmalosa fimbriata
Döring, Julian; Wagner, Carola; Tiedemann, Maik; Brehmer, Patrice; Ekau, Werner (Journal article; Peer reviewed, 2019)The gross energy content of spawning batches and the microchemistry of sagittal otoliths in individual female bonga shad Ethmalosa fimbriata were compared between contrasting sampling sites at the Senegalese southern coast ...