First evidence of a new spawning stock of Illex coindetii in the North Sea (NE-Atlantic)

Daniel Oesterwind, Bianca T.C. Bobowski, Anika Brunsch, Vladimir Laptikhovsky, Ralf Van Hal, Anne F. Sell, Graham J. Pierce

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Global changes drive abundance and distribution of species worldwide. It seems that at least some cephalopodstocks profit from global changes as indicated by increases in biomass and/or expansion of their geographicaldistribution, as appears to be the case for the commercially important ommastrephid squidIllexcoindetii, in theNorth Sea. Based on the recently increased abundance of this species seen in research trawl hauls, here wepresent the first evidence of a summer spawning stock ofIllexcoindetiiin the North Sea and derive a descriptionof its life cycle. Neither mated females nor spent males were reported from the area previously. In quarter 1 themajority ofIllexcoindetiiwere immature (maturity stage 0) and maturing (maturity stage 1–3) while in quarter 3almost exclusively mature and spent individuals (maturity stage 4–6) were caught. We observed up to threespermatangia bundles attached to females in quarter 3, indicating that spawning and reproduction takes place inthe North Sea and that the species is already established in this area. Estimated egg hatching dates suggest aprolonged hatching period and therefore likely a long spawning season, although cold temperature seems tolimit year round reproduction. The intensity of individual migrations from adjacent waters into the North Sea isunknown and therefore the number of individuals staying permanently in the North Sea could not be estimated.It is consequently still unclear whether the North Sea individuals ofI. coindetiiconstitute a new separate stock
Original languageEnglish
Article number105384
JournalFisheries Research
Volume221
DOIs
Publication statusPublished - 1 Jan 2020

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Illex
North Sea
spawning
maturity stage
global change
hatching
cold season
hatching date
profits and margins
life cycle (organisms)
biogeography
immatures
sea
life cycle
egg
summer
biomass
temperature

Keywords

  • North Sea
  • ommastrephidae
  • illex
  • reproduction
  • distribution
  • Life cycle

Cite this

Oesterwind, D., Bobowski, B. T. C., Brunsch, A., Laptikhovsky, V., Van Hal, R., Sell, A. F., & Pierce, G. J. (2020). First evidence of a new spawning stock of Illex coindetii in the North Sea (NE-Atlantic). Fisheries Research, 221, [105384]. https://doi.org/10.1016/j.fishres.2019.105384
Oesterwind, Daniel ; Bobowski, Bianca T.C. ; Brunsch, Anika ; Laptikhovsky, Vladimir ; Van Hal, Ralf ; Sell, Anne F. ; Pierce, Graham J. / First evidence of a new spawning stock of Illex coindetii in the North Sea (NE-Atlantic). In: Fisheries Research. 2020 ; Vol. 221.
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abstract = "Global changes drive abundance and distribution of species worldwide. It seems that at least some cephalopodstocks profit from global changes as indicated by increases in biomass and/or expansion of their geographicaldistribution, as appears to be the case for the commercially important ommastrephid squidIllexcoindetii, in theNorth Sea. Based on the recently increased abundance of this species seen in research trawl hauls, here wepresent the first evidence of a summer spawning stock ofIllexcoindetiiin the North Sea and derive a descriptionof its life cycle. Neither mated females nor spent males were reported from the area previously. In quarter 1 themajority ofIllexcoindetiiwere immature (maturity stage 0) and maturing (maturity stage 1–3) while in quarter 3almost exclusively mature and spent individuals (maturity stage 4–6) were caught. We observed up to threespermatangia bundles attached to females in quarter 3, indicating that spawning and reproduction takes place inthe North Sea and that the species is already established in this area. Estimated egg hatching dates suggest aprolonged hatching period and therefore likely a long spawning season, although cold temperature seems tolimit year round reproduction. The intensity of individual migrations from adjacent waters into the North Sea isunknown and therefore the number of individuals staying permanently in the North Sea could not be estimated.It is consequently still unclear whether the North Sea individuals ofI. coindetiiconstitute a new separate stock",
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author = "Daniel Oesterwind and Bobowski, {Bianca T.C.} and Anika Brunsch and Vladimir Laptikhovsky and {Van Hal}, Ralf and Sell, {Anne F.} and Pierce, {Graham J.}",
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Oesterwind, D, Bobowski, BTC, Brunsch, A, Laptikhovsky, V, Van Hal, R, Sell, AF & Pierce, GJ 2020, 'First evidence of a new spawning stock of Illex coindetii in the North Sea (NE-Atlantic)' Fisheries Research, vol. 221, 105384. https://doi.org/10.1016/j.fishres.2019.105384

First evidence of a new spawning stock of Illex coindetii in the North Sea (NE-Atlantic). / Oesterwind, Daniel; Bobowski, Bianca T.C.; Brunsch, Anika; Laptikhovsky, Vladimir; Van Hal, Ralf; Sell, Anne F.; Pierce, Graham J.

In: Fisheries Research, Vol. 221, 105384, 01.01.2020.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - First evidence of a new spawning stock of Illex coindetii in the North Sea (NE-Atlantic)

AU - Oesterwind, Daniel

AU - Bobowski, Bianca T.C.

AU - Brunsch, Anika

AU - Laptikhovsky, Vladimir

AU - Van Hal, Ralf

AU - Sell, Anne F.

AU - Pierce, Graham J.

PY - 2020/1/1

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AB - Global changes drive abundance and distribution of species worldwide. It seems that at least some cephalopodstocks profit from global changes as indicated by increases in biomass and/or expansion of their geographicaldistribution, as appears to be the case for the commercially important ommastrephid squidIllexcoindetii, in theNorth Sea. Based on the recently increased abundance of this species seen in research trawl hauls, here wepresent the first evidence of a summer spawning stock ofIllexcoindetiiin the North Sea and derive a descriptionof its life cycle. Neither mated females nor spent males were reported from the area previously. In quarter 1 themajority ofIllexcoindetiiwere immature (maturity stage 0) and maturing (maturity stage 1–3) while in quarter 3almost exclusively mature and spent individuals (maturity stage 4–6) were caught. We observed up to threespermatangia bundles attached to females in quarter 3, indicating that spawning and reproduction takes place inthe North Sea and that the species is already established in this area. Estimated egg hatching dates suggest aprolonged hatching period and therefore likely a long spawning season, although cold temperature seems tolimit year round reproduction. The intensity of individual migrations from adjacent waters into the North Sea isunknown and therefore the number of individuals staying permanently in the North Sea could not be estimated.It is consequently still unclear whether the North Sea individuals ofI. coindetiiconstitute a new separate stock

KW - North Sea

KW - ommastrephidae

KW - illex

KW - reproduction

KW - distribution

KW - Life cycle

U2 - 10.1016/j.fishres.2019.105384

DO - 10.1016/j.fishres.2019.105384

M3 - Article

VL - 221

JO - Fisheries Research

JF - Fisheries Research

SN - 0165-7836

M1 - 105384

ER -