Bruskfisk

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Brugda er vanligvis bare sett i overflata mens den spiser dyreplankton. (Foto: Nils Øien / Havforskningsinstituttet)

Fiskene vi kaller bruskfisk er haier, skater, rokker og helhodefisker (havmus). Bruskfisk har, som navnet viser til, et skjelett av brusk istedenfor bein.

I motsetning til beinfisk mangler bruskfiskene svømmeblære. Brusk er lettere enn bein og de kan i tillegg kontrollere flyteevnen med brystfinnene. De fleste artene har i tillegg en oljerik lever som kan utgjøre opptil 30% av kroppsmassen deres og som bidrar til oppdrift.

Disse artene finnes i norske farvann

Hai

Brugde - Cetorhinus maximus 
Gråhai - Galeorhinus galeus
Håbrann - Lamna nasus 
Hågjel - Galeus melastomus
Håkjerring - Somniosus microcephalus
Pigghå - Squalus acanthias
Småflekket rødhai - Scyliorhinus canicula
Svarthå - Etmopterus spinax

Skater

Flekkskate - Raja montagui

Gjøkskate - Leucoraja naevus

Gråskate - Bathyraja spinicauda

Hvitskate - Rajella lintea

Isskate - Amblyraja hyperborea

Kloskate - Amblyraja radiata

Nebbskate - Leucoraja fullonica

Piggskate - Raja clavata

Prikkskate - Raja brachyura

Rundskate - Rajella fyllae

Sandskate - Leucoraja circularis

Spisskate - Dipturus oxyrinchus

Storskate - Dipturus intermedius (D. batis kompleks)

Svartskate skate - Dipturus nidarosiensis

Helhodefisker

Havmus - Chimaera monstrosa

Prosjekter og aktiviteter

Vi jobber med mange forskjellige hai- og skatearter samt havmus i norske farvann. Våre forskningsspørsmål spenner fra livshistorie og bestandsutvikling til utbredelse skift, bestands/ populasjonstilkobling og bevegelses- og hjemmeområder.

De viktigste haiartene vi  jobber med nå er pigghå, håbrann og brugde.

I tillegg samarbeider vi med kolleger i Bergen og Arve Lynghammar fra UiT om spørsmål relatert til skater og deres artsidentifikasjon på fiske- og forskningsfartøy.

Brugde

Brugdeprosjektet er et samarbeidsprosjekt mellom flere forskere i Norge og Skottland. Målet for prosjekt er å få bedre oversikt over fordeling og vandringsmønster i norske farvann. Derfor har vi lansert et elektronisk skjema for rapportering av brugdeobservasjoner, og vi håper at de som ser brugde rapporterer inn når og hvor observasjonen fant sted (både observasjoner av levende brugder eller funn av døde individer).

Skjema for rapportering av brugdeobservasjoner finner du her: Har du sett brugde?

Utvalgte publikasjoner

2019

Junge C, Donnellan SC, Huveneers C, Bradshaw CJA, Simon A, Drew M, Duffy C, Johnson G, Cliff G, Braccini M, Cutmore SC, Butcher P, McAuley R, Peddemors V, Rogers P, Gillanders BM (2019). Comparative population genomics confirms little population structure in two commercially targeted carcharhinid sharks.  Marine Biology, 166:16. DOI: 10.1007/s00227-018-3454-4

Pazmiño DA, van Herderden L, Simpfendorfer CA, Junge C, Donnellan SC, Hoyos-Padilla EM, Duffy CA, Huveneers C, Gillanders BM, Butcher PA, Maes GE (2019) Introgressive hybridisation between two widespread sharks in the east Pacific region. Molecular phylogenetics and evolution 136:119-27.

2018

Albert OT (2018). Porbeagle: Data limited stock assessment, using the SPICT model. Working document no. 13 to WGEF, Lisbon 19-28 June 2018.

ICES WGEF (2018). Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 12-28 June 2018, Lisbon, Portugal. ICES CM 2018/ACOM:16. 1306pp. (Albert OT, Junge C)

2017

Albert OT and Knutsen M (2017). Population parameters of spurdog from Norwegian landings in 2015-2017. Working document for the ICES Elasmobranch Working Group (WGEF) 2017.

ICES WGEF. (2017) Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 31 May-7 June 2017, Lisbon, Portugal. ICES CM 2017/ACOM:16. 1018pp. (Albert OT, Knutsen M)

Knutsen M, Thangstad TH, Søvik G and Albert OT (2017). Survey trends of skates in Norwegian waters. Working document for the ICES Elasmobranch Working Group (WGEF) 2017.

McMillan MN, Izzo C, Junge C, Albert OT, Jung A, Gillanders BM (2017). Analysis of vertebral chemistry to assess stock structure in a deep-sea shark, Etmopterus spinax. ICES Journal of Marine Science, 74, 793–803.  DOI:10.1093/icesjms/fsw176.

2016

Albert OT (2016). Update on occurrence of Spurdog in Norwegian catches.  Working document for the ICES Elasmobranch Working Group (WGEF) 2016.

Albert OT, Vollen T, Bjelland O, Otterå H, and Nedreaas KH (2016). Norwegian catches and landings of skates by species. Working document for the ICES Elasmobranch Working Group (WGEF) 2016.

ICES WGEF. (2016) Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 15–24 June 2016, Lisbon, Portugal. ICES CM/ACOM:20. 26pp. (Albert OT, Vollen T)

2015

Albert OT and Vollen T (2015).  Spurdog in Norwegian waters: Recent trends in occurrence and composition in surveys and commercial catches. Working document for the ICES Elasmobranch Working Group (WGEF) 2015.

Donnellan SC, Foster R, Junge C, Huveneers, C, Rogers P, Kilians A, Bertozzi T (2015). Fiddling with the proof: the Magpie Fiddler Ray is a colour pattern variant of the common Southern Fiddler Ray (Rhinobatidae: Trygonorrhina). Zootaxa 3981:367-84.

ICES WGEF. (2015) Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 17–23 June 2015, Lisbon, Portugal. ICES CM 2015/ACOM:19. 711 pp. (Albert OT, Vollen T)

Vollen T and Albert OT (2015). Spurdog in two Norwegian surveys. Working document for the ICES Elasmobranch Working Group (WGEF) 2015.

Wienerroither RM, Bjelland O, Bachmann L, Junge C (2015). Northernmost record of the little gulper shark Centrophorus uyato in the north-eastern Atlantic Ocean, with taxonomical notes on Centrophorus zeehaani. Journal of Fish Biology 86, 834–844. DOI: 0.1111/jfb.12602

2014

ICES WGEF. (2014) Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 17–26 June 2014, Lisbon, Portugal. ICES CM 2014/ACOM:19. 887 pp. (Vollen T, Lynghammar A (UiT))

Vollen T (2014). Data on spurdog from two Norwegian surveys; the Shrimp survey and the Coastal survey updated with new data in 2014. Working Document presented at the Working Group on Elasmobranch Fishes (WGEF) meeting, 17–26 June 2014; 2014/25.

2013

ICES WGEF. (2013) Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 17–21 June 2013, Lisbon, Portugal. ICES CM 2013/ACOM:19. 680 pp. (Albert OT, Vollen T)

2012

Albert OT and Vollen T (2012).  Plan for a Norwegian sentinel fishery for spurdog. Working document for the ICES Elasmobranch Working Group (WGEF) 2012.

ICES WGEF. (2012) Report of the International Council for the Exploration of the Sea’s Working Group on Elasmobranch Fishes (WGEF), 19–26 June 2012, Lisbon, Portugal. ICES CM 2012/ACOM:19. 547 pp. (Albert OT, Vollen T)