Cristin-resultat-ID: 1935186
Sist endret: 21. oktober 2021, 16:16
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea)

Bidragsytere:
  • Ludvig Ahm Krag
  • Bjørn Arne Krafft
  • Bent Herrmann og
  • Peter V. Skov

Tidsskrift

Journal of Crustacean Biology
ISSN 0278-0372
e-ISSN 1937-240X
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Publisert online: 2021
Volum: 41
Hefte: 2
Artikkelnummer: ruab013
Open Access

Importkilder

Scopus-ID: 2-s2.0-85107410062

Beskrivelse Beskrivelse

Tittel

Physiological stress and recovery kinetics in trawl escapees of the Antarctic krill Euphausia superba Dana, 1850 (Euphausiacea)

Sammendrag

When caught in a trawl, some individuals interacting with the fishing gear may escape, but such interactions may lead to physiological trauma that causes direct delayed mortality and/or increased vulnerability to predation. Understanding fishery-induced stress levels and the recovery period of escapees is therefore crucial for predicting total fishing-induced mortality. Hemolymph lactate concentration is commonly used as an index of physiological stress in many crustacean species, and the clearing time of lactate back to normal levels indicates the ability to recover from stress. We measured the hemolymph lactate concentration in three groups of Antarctic krill (Euphausia superbaDana, 1850): Group 1, trawl escapees collected during fishing; Group 2, specimens subjected to simulated mesh penetration; and Group 3, an onboard acclimated control group. Individuals that had escaped the trawl during fishing had the highest concentrations of hemolymph lactate (mean > 6 mmol–l). Exposure to mesh penetration was in itself not stressful, as hemolymph lactate concentrations did not differ significantly between Group 2 and the control Group (mean 0.8 mmol–lversus 0.7 mmol–l, respectively). Additional stress factors during the capture and handling process likely added to the elevated lactate levels observed in Group 1. For the trawl escapees, the lactate clearance time during stress recovery was modeled as a function of exponential decay. Hemolymph lactate levels did not differ significantly among the three groups after 200 min, which suggested that Antarctic krill recovered from fishery-induced stress within this time period.

Bidragsytere

Ludvig Ahm Krag

  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet
Aktiv cristin-person

Bjørn Arne Krafft

  • Tilknyttet:
    Forfatter
    ved Plankton ved Havforskningsinstituttet

Bent Herrmann

  • Tilknyttet:
    Forfatter
    ved Norges fiskerihøgskole ved UiT Norges arktiske universitet
  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet
  • Tilknyttet:
    Forfatter
    ved Fiskeri og ny biomarin industri ved SINTEF Ocean

Peter V. Skov

  • Tilknyttet:
    Forfatter
    ved Danmarks Tekniske Universitet
1 - 4 av 4