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  • 1
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    Individual whole-animal parameters of Polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) acclimated to ocean acidification and warming conditions, and time series of seawater carbonate chemistry calculated throughout incubation period (2016)
    PANGAEA
    In:  Supplement to: Kunz, Kristina Lore; Frickenhaus, Stephan; Hardenberg, Silvia; Torild, Johansen; Leo, Elettra; Pörtner, Hans-Otto; Schmidt, Matthias; Windisch, Heidrun Sigrid; Knust, Rainer; Mark, Felix Christopher (2016): New encounters in Arctic waters: a comparison of metabolism and performance of polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) under ocean acidification and warming. Polar Biology, 39(6), 1137-1153, https://doi.org/10.1007/s00300-016-1932-z
    Details
    Publication Date: 2023-09-28
    Description: Oceans are experiencing increasing acidification in parallel to a distinct warming trend in consequence of ongoing climate change. Rising seawater temperatures are mediating a northward shift in distribution of Atlantic cod (Gadus morhua), into the habitat of polar cod (Boreogadus saida), that is associated with retreating cold water masses. This study investigates the competitive strength of the co-occurring gadoids under ocean acidification and warming (OAW) scenarios. Therefore, we incubated specimens of both species in individual tanks for 4 months, under different control and projected temperatures (polar cod: 0, 3, 6, 8 °C, Atlantic cod: 3, 8, 12, 16 °C) and PCO2 conditions (390 and 1170 µatm) and monitored growth, feed consumption and standard metabolic rate. Our results revealed distinct temperature effects on both species. While hypercapnia by itself had no effect, combined drivers caused nonsignificant trends. The feed conversion efficiency of normocapnic polar cod was highest at 0 °C, while optimum growth performance was attained at 6 °C; the long-term upper thermal tolerance limit was reached at 8 °C. OAW caused only slight impairments in growth performance. Under normocapnic conditions, Atlantic cod consumed progressively increasing amounts of feed than individuals under hypercapnia despite maintaining similar growth rates during warming. The low feed conversion efficiency at 3 °C may relate to the lower thermal limit of Atlantic cod. In conclusion, Atlantic cod displayed increased performance in the warming Arctic such that the competitive strength of polar cod is expected to decrease under future OAW conditions.
    Keywords: Animalia; Behaviour; BIOACID; Biological Impacts of Ocean Acidification; Boreogadus saida; Chordata; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); Gadus morhua; Growth/Morphology; Laboratory experiment; Mortality/Survival; Nekton; Pelagos; Polar; Respiration; Single species; Temperature
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    New encounters in Arctic waters: a comparison of metabolism and performance of polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) under ocean acidification and warming (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-22
    Keywords: 58HJ_Kongsfjorden_2013-01; Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Aragonite saturation state, standard deviation; Arctic; Arctic Ocean; Behaviour; Bicarbonate ion; Bicarbonate ion, standard deviation; Boreogadus saida; Calcite saturation state; Calcite saturation state, standard deviation; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Chordata; Coast and continental shelf; Condition factor; Containers and aquaria (20-1000 L or 〈 1 m**2); Event label; Feed, dry, total; Feed conversion efficiency; Feeding period; Feed intake, per unit body mass; Fish, total length; Fish, wet mass; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Gadus morhua; Gonad, mass; Gonadosomatic index; Growth/Morphology; HE408; HE408/04-1; Heincke; Hepatosomatic index; Incubation duration; Kongsfjorden, Spitsbergen, Arctic; Laboratory experiment; LATITUDE; Liver, mass; LONGITUDE; Metabolic rate, standard; Mortality; Mortality/Survival; Mortality per treatment; Nekton; North Atlantic; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Polar; Potentiometric; Registration number of species; Reproduction; Salinity; Salinity, standard deviation; Single species; Species; Specific growth rate; Stomach, wet mass; Stomach content, wet mass; Stomach fullness; Temperature; Temperature, water; Temperature, water, standard deviation; Treatment: partial pressure of carbon dioxide; Treatment: temperature; Type; Uniform resource locator/link to reference; YFT; Young fish trawl
    Type: Dataset
    Format: text/tab-separated-values, 10065 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Individual whole-animal parameters of Polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) acclimated to ocean acidification and warming conditions (2016)
    PANGAEA
    Details
    Publication Date: 2024-04-22
    Description: In order to access potential impacts of ocean acidification and warming on the whole-animal performance of polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua), individuals of both species were acclimated to different temperature (polar cod: 0, 3, 6, 8°C; Atlantic cod: 3, 8, 12, 16°C) and PCO2 (390 and 1,170 µatm) scenarios for four months. Wet body weight (BW) (g) and total length (TL) (mm) of each individual were measured before and after the incubation period. Subsequently, the specific growth rate (SGR) (%/day) was calculated. The fish were fed every fourth day. Individual feed consumption (FI) (g) was recorded and used for the calculation of daily feed intake (g/(day*BW)). Growth gain (g) and FI throughout the incubation period were translated into feed conversion efficiency (FCE). After the incubation period, starved fish were placed in a respiration chamber to identify the standard metabolic rate (SMR) (µmol/(min*g)) using intermittent-flow respirometry. Subsequently, the fish were sacrificed for the determination of BW, TL, liver weight (WL) (g), gonad weight (WG) (g), stomach including content (g) and stomach content (g) for the calculation of condition factor (CF), hepatosomatic index (HSI) (%), gonadosomatic index (GSI) (%) and stomach filling (%).
    Keywords: 58HJ_Kongsfjorden_2013-01; Arctic Ocean; BIOACID; Biological Impacts of Ocean Acidification; Condition factor; Event label; Feed, dry, total; Feed conversion efficiency; Feeding period; Feed intake, per unit body mass; Fish, total length; Fish, wet mass; Gonad, mass; Gonadosomatic index; HE408; HE408/04-1; Heincke; Hepatosomatic index; Incubation duration; Kongsfjorden, Spitsbergen, Arctic; Latitude of event; Liver, mass; Longitude of event; Metabolic rate, standard; Mortality; Mortality per treatment; Species; Specific growth rate; Stomach, wet mass; Stomach content, wet mass; Stomach fullness; Treatment: partial pressure of carbon dioxide; Treatment: temperature; YFT; Young fish trawl
    Type: Dataset
    Format: text/tab-separated-values, 3921 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    New encounters in Arctic waters: a comparison of metabolism and performance of polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) under ocean acidification and warming (2016)
    Springer
    In:  Polar Biology, 39 . pp. 1137-1153.
    Details
    Publication Date: 2019-08-06
    Description: Oceans are experiencing increasing acidification in parallel to a distinct warming trend in consequence of ongoing climate change. Rising seawater temperatures are mediating a northward shift in distribution of Atlantic cod (Gadus morhua), into the habitat of polar cod (Boreogadus saida), that is associated with retreating cold water masses. This study investigates the competitive strength of the co-occurring gadoids under ocean acidification and warming (OAW) scenarios. Therefore, we incubated specimens of both species in individual tanks for 4 months, under different control and projected temperatures (polar cod: 0, 3, 6, 8 °C, Atlantic cod: 3, 8, 12, 16 °C) and PCO2 conditions (390 and 1170 µatm) and monitored growth, feed consumption and standard metabolic rate. Our results revealed distinct temperature effects on both species. While hypercapnia by itself had no effect, combined drivers caused nonsignificant trends. The feed conversion efficiency of normocapnic polar cod was highest at 0 °C, while optimum growth performance was attained at 6 °C; the long-term upper thermal tolerance limit was reached at 8 °C. OAW caused only slight impairments in growth performance. Under normocapnic conditions, Atlantic cod consumed progressively increasing amounts of feed than individuals under hypercapnia despite maintaining similar growth rates during warming. The low feed conversion efficiency at 3 °C may relate to the lower thermal limit of Atlantic cod. In conclusion, Atlantic cod displayed increased performance in the warming Arctic such that the competitive strength of polar cod is expected to decrease under future OAW conditions
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00300-016-1932-z
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    New encounters in Arctic waters: a comparison of metabolism and performance of polar cod (Boreogadus saida) and Atlantic cod (Gadus morhua) under ocean acidification and warming (2016)
    In:  EPIC3Polar Biology, 39(6), pp. 1137-1153, ISSN: 0722-4060
    Details
    Publication Date: 2016-08-19
    Description: Oceans are experiencing increasing acidification in parallel to a distinct warming trend in consequence of ongoing climate change. Rising seawater temperatures are mediating a northward shift in distribution of Atlantic cod (Gadus morhua), into the habitat of polar cod (Boreogadus saida), that is associated with retreating cold water masses. This study investigates the competitive strength of the co-occurring gadoids under ocean acidification and warming (OAW) scenarios. Therefore, we incubated specimens of both species in individual tanks for 4 months, under different control and projected temperatures (polar cod: 0, 3, 6, 8 °C, Atlantic cod: 3, 8, 12, 16 °C) and PCO2 conditions (390 and 1170 µatm) and monitored growth, feed consumption and standard metabolic rate. Our results revealed distinct temperature effects on both species. While hypercapnia by itself had no effect, combined drivers caused nonsignificant trends. The feed conversion efficiency of normocapnic polar cod was highest at 0 °C, while optimum growth performance was attained at 6 °C; the long-term upper thermal tolerance limit was reached at 8 °C. OAW caused only slight impairments in growth performance. Under normocapnic conditions, Atlantic cod consumed progressively increasing amounts of feed than individuals under hypercapnia despite maintaining similar growth rates during warming. The low feed conversion efficiency at 3 °C may relate to the lower thermal limit of Atlantic cod. In conclusion, Atlantic cod displayed increased performance in the warming Arctic such that the competitive strength of polar cod is expected to decrease under future OAW conditions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 6
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    Metabolic and physiological responses in tissues of the long-lived bivalve Arctica islandica to oxygen deficiency (2011)
    In:  EPIC3Comparative Biochemistry and Physiology A.
    Details
    Publication Date: 2015-09-11
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
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    PAPER (OA)
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