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  • PANGAEA  (66)
  • Copernicus Publications (EGU)  (2)
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  • 1
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    Effect of ocean acidification on early life stages of Atlantic herring (Clupea harengus L.) (2011)
    Copernicus Publications (EGU)
    In:  Biogeosciences (BG), 8 . pp. 3697-3707.
    Details
    Publikationsdatum: 2020-10-16
    Beschreibung: Due to atmospheric accumulation of anthropogenic CO2 the partial pressure of carbon dioxide (pCO2) in surface seawater increases and the pH decreases. This process known as ocean acidification might have severe effects on marine organisms and ecosystems. The present study addresses the effect of ocean acidification on early developmental stages, the most sensitive stages in life history, of the Atlantic herring (Clupea harengus L.). Eggs of the Atlantic herring were fertilized and incubated in artificially acidified seawater (pCO2 1260, 1859, 2626, 2903, 4635 μatm) and a control treatment (pCO2 480 μatm) until the main hatch of herring larvae occurred. The development of the embryos was monitored daily and newly hatched larvae were sampled to analyze their morphometrics, and their condition by measuring the RNA/DNA ratios. Elevated pCO2 neither affected the embryogenesis nor the hatch rate. Furthermore the results showed no linear relationship between pCO2 and total length, dry weight, yolk sac area and otolith area of the newly hatched larvae. For pCO2 and RNA/DNA ratio, however, a significant negative linear relationship was found. The RNA concentration at hatching was reduced at higher pCO2 levels, which could lead to a decreased protein biosynthesis. The results indicate that an increased pCO2 can affect the metabolism of herring embryos negatively. Accordingly, further somatic growth of the larvae could be reduced. This can have consequences for the larval fish, since smaller and slow growing individuals have a lower survival potential due to lower feeding success and increased predation mortality. The regulatory mechanisms necessary to compensate for effects of hypercapnia could therefore lead to lower larval survival. Since the recruitment of fish seems to be determined during the early life stages, future research on the factors influencing these stages are of great importance in fisheries science.
    Materialart: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    Format: text
    DOI: 10.5194/bg-8-3697-2011
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
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    Effect of ocean acidification on marine fish sperm (Baltic cod: Gadus morhua) (2010)
    Copernicus Publications (EGU)
    In:  Biogeosciences (BG), 7 . pp. 3915-3919.
    Details
    Publikationsdatum: 2020-10-16
    Beschreibung: Ocean acidification, as a consequence of increasing marine pCO2, may have severe effects on the physiology of marine organisms. However, experimental studies remain scarce, in particular concerning fish. While adults will most likely remain relatively unaffected by changes in seawater pH, early life-history stages are potentially more sensitive – particularly the critical stage of fertilization, in which sperm motility plays a central role. In this study, the effects of ocean acidification (decrease of pHT to 7.55) on sperm motility of Baltic cod, Gadus morhua, were assessed. We found no significant effect of decreased pH on sperm speed, rate of change of direction or percent motility for the population of cod analyzed. We predict that future ocean acidification will probably not pose a problem for sperm behavior, and hence fertilization success, of Baltic cod.
    Materialart: Article , PeerReviewed
    Format: text
    DOI: 10.5194/bg-7-3915-2010
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
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    Continuous water temperature, salinity, oxygen and pH data in front of GEOMAR Pier, Kiel, Germany (2014-2019) (2021)
    PANGAEA
    Details
    Publikationsdatum: 2023-03-17
    Beschreibung: 2014-2019: Since September 2014, temperature, salinity, pH (only 2014-2015) and oxygen data were additionally logged in 10-minutes intervals at the GEOMAR pier (54°19'48.8N 10°08'59.6E) (AANDERAA oxygen sensor 3835 & SEABIRD SBE 37-SI MicroCAT CT(D)). The sensor system is mounted to a floating platform so that a continuous depth of 1 m is guaranteed at every time point. Oxygen data were corrected for salinity, temperature and depth following the manual for Aanderaa Optodes using the salinity and temperature measurements from the SEABIRD SBE 37-SI MicroCAT CT(D) sensor. pH was also corrected for salinity, temperature and depth following Martz et al. (2010). After cleaning and other re-boots of the sensor package, temperature, salinity and oxygen data tend to deviate from true values. Hence, 60 minutes of data after any re-boot (after sensor servicing with re-deployment, data download or power failure) were deleted. Furthermore, salinity data lower than 8 and pH data lower than 5 and larger than 10 were removed from the data set as these values were identified as outliers. On May 22nd 2018 as well as on May 26th (22:00) til 27th (15:00) 2019 oxygen data were identified as outliers and removed from the data set. The logged oxygen data were plotted against titration data (doi:10.1594/PANGAEA.930974) to check for drifts in the optode's data. But no drift pattern could be detected and the fit of the regression was very good R2adj. = 0.673, p 〈 0.001)
    Schlagwort(e): Corrected; CTD, Sea-Bird, SBE 37-SI MicroCAT; DATE/TIME; DEPTH, water; Kiel-Fjord_GEOMAR-Pier; Monitoring station; MONS; Number; Oxygen; Oxygen, dissolved; Oxygen optode, Aanderaa type 3835; Oxygen saturation; pH; Salinity; Temperature, water
    Materialart: Dataset
    Format: text/tab-separated-values, 1621988 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 4
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    Water temperature, salinity and oxygen data from 2005-2019 in front of GEOMAR Pier, Kiel, Germany (2021)
    PANGAEA
    Details
    Publikationsdatum: 2023-03-08
    Beschreibung: 2005-2019 CTD (48M, Sea & Sun Technology GmbH, Trappenkamp, Germany) measurements and water samples at the surface (0 m depth), at 7 m and 18 m depth were taken biweekly between 2005 and 2019 at the “Wittlingskuhle” a bit off the GEOMAR pier in the Inner Kiel Fjord (N 54°19.69, E 10°09.06). The oxygen concentration of these water samples was measured by the Winkler- iodometric titration method (Winkler 1888) in mg/L and are converted to oxygen-saturation values by correcting for temperature, salinity and pressure.
    Schlagwort(e): CTD, Sea & Sun Technology, Germany, 48M; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Event label; Kiel Fjord; Oxygen; Oxygen, dissolved; Oxygen saturation; PF2005; PF2005_Kiel-fjord; PF2006; PF2006_Kiel-fjord; PF2007; PF2007_Kiel-fjord; PF2008; PF2008_Kiel-Fjord; PF2009; PF2009_Kiel-fjord; PF2010; PF2010_Kiel-fjord; PF2011; PF2011_Kiel-fjord; PF2012; PF2012_Kiel-fjord; PF2013; PF2013_Kiel-fjord; PF2014; PF2014_Kiel-fjord; PF2015; PF2015_Kiel-fjord-2; PF2016; PF2016_Kiel-fjord; PF2017; PF2017_Kiel-fjord; PF2018; PF2018_Kiel-fjord; PF2019; PF2019_Kiel-fjord; Polarfuchs; Salinity; Temperature, water; Titration, Winkler
    Materialart: Dataset
    Format: text/tab-separated-values, 16044 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 5
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    Prey concentrations for herring larvae, Clupea harengus L., during a laboratory experiment on the combined effect of temperature and CO2 in a low food environment (Kristineberg, Sweden 2013) (2018)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publikationsdatum: 2023-02-24
    Schlagwort(e): BIOACID; Biological Impacts of Ocean Acidification; DATE/TIME; Prey; Time in days
    Materialart: Dataset
    Format: text/tab-separated-values, 58 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 6
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    Kiel fjord silicate and phosphate data from discrete water samples in 2015 (2017)
    PANGAEA
    Details
    Publikationsdatum: 2023-03-03
    Beschreibung: This dataset is part of a dataset collection. Please read the documentation in Kiel fjord carbonate chemistry data between 2015 (February) and 2016 (January) doi:10.1594/PANGAEA.876551 for details on sampling, measurement and data processing.
    Schlagwort(e): DATE/TIME; DEPTH, water; Hand water sampler; HWS; PF2015; PF2015_Kiel-fjord; Phosphate; Polarfuchs; Silicate; Wittlingskuhle
    Materialart: Dataset
    Format: text/tab-separated-values, 66 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 7
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    Gene expression, growth and survival of European sea bass post-larvae (Dicentrarchus labrax) after PHB administration (2017)
    PANGAEA
    In:  Supplement to: Franke, Andrea; Clemmesen, Catriona; De Schryver, Peter; Garcia-Gonzalez, Linsey; Miest, Joanna; Roth, Olivia (2017): Immunostimulatory effects of dietary poly-ß-hydroxybutyrate in European sea bass postlarvae. Aquaculture Research, https://doi.org/10.1111/are.13393
    Details
    Publikationsdatum: 2023-01-13
    Beschreibung: The stable production of high quality fry in marine aquaculture is still hampered by unpredictable mortality caused by infectious diseases during larval rearing. Consequently, the development of new biocontrol agents is crucial for a viable aquaculture industry. The bacterial energy storage compound poly-ß-hydroxybutyrate (PHB) has been shown to exhibit beneficial properties on aquatic organisms such as enhanced survival, growth, disease resistance and a controlling effect on the gastrointestinal microbiota. However, the effect of PHB on the developing immune system of fish larvae has so far not been investigated. In the present study, the effect of feeding PHB-enriched Artemia nauplii on survival, growth and immune response in European sea bass (Dicentrarchus labrax) post-larvae was examined. Amorphous PHB was administered to 28 days old sea bass larvae over a period of 10 days. The survival and growth performance were monitored and the expression of 29 genes involved in immunity, growth, metabolism and stress-response was measured. While the expression of the insulin-like growth factor 1 (igf1), an indicator of relative growth, was upregulated in response to feeding PHB, the larval survival and growth performance remained unaffected. After 10 days of PHB treatment, the expression of the antimicrobial peptides dicentracin (dic) and hepcidin (hep) as well as mhc class IIa and mhc class IIb was elevated in the PHB fed larvae. This indicates that PHB is capable of stimulating the immune system of fish early life stages, which may be the cause of the increased resistance to diseases and robustness observed in previous studies.
    Materialart: Dataset
    Format: application/zip, 3 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 8
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    Gene expression, growth and survival of European sea bass yolk-sac larvae (Dicentrarchus labrax) after PHB administration (2017)
    PANGAEA
    In:  Supplement to: Franke, Andrea; Roth, Olivia; De Schryver, Peter; Bayer, Till; Garcia-Gonzalez, Linsey; Künzel, Sven; Bossier, Peter; Miest, Joanna; Clemmesen, Catriona (2017): Poly-ß-hydroxybutyrate administration during early life: effects on performance, immunity and microbial community of European sea bass yolk-sac larvae. Scientific Reports, 7(1), https://doi.org/10.1038/s41598-017-14785-z
    Details
    Publikationsdatum: 2023-01-13
    Beschreibung: The reliable production of marine fish larvae is one of the major bottlenecks in aquaculture due to high mortalities mainly caused by infectious diseases. To evaluate if the compound poly-ß-hydroxybutyrate (PHB) might be a suitable immunoprophylactic measure in fish larviculture, its capacity to improve immunity and performance in European sea bass (Dicentrarchus labrax) yolk-sac larvae was explored. Dietary PHB was applied from mouth opening onwards to stimulate the developing larval immune system at the earliest possible point in time. Larval survival, growth, microbiota composition, gene expression profiles and disease resistance were assessed. PHB administration improved larval survival and, furthermore, altered the larva-associated microbiota composition. The bacterial challenge test using pathogenic Vibrio anguillarum revealed that the larval disease resistance was not influenced by PHB. The expression profiles of 26 genes involved e.g. in the immune response showed that PHB affected the expression of the antimicrobial peptides ferritin (fer) and dicentracin (dic), however, the response to PHB was inconsistent and weaker than previously demonstrated for sea bass post-larvae. Hence, the present study highlights the need for more research focusing on the immunostimulation of different early developmental stages for gaining a more comprehensive picture and advancing a sustainable production of high quality fry.
    Materialart: Dataset
    Format: application/zip, 5 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 9
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    Kiel fjord carbonate chemistry data between 2015 (February) and 2016 (January) (2017)
    PANGAEA
    In:  GEOMAR - Helmholtz Centre for Ocean Research Kiel
    Details
    Publikationsdatum: 2023-01-13
    Beschreibung: A HydroC® CO2 sensor was deployed from a pontoon at the waterfront of the GEOMAR west shore building into Kiel Fjord, Western Baltic Sea (Kiel, Germany; 54°19'48.78"N, 010° 8'59.44"E). Since the pontoon is floating the deployment depth of the sensor was constant at 1m. Data of two deployment intervals are published here: February 2015 – May 2015 and August 2015 – January 2016.
    Schlagwort(e): CO2S; CO2 Sensor; Kiel Fjord; Kiel-Fjord_GEOMAR
    Materialart: Dataset
    Format: application/zip, 3 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 10
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    Experiment on Hemigrapsus takanoi from Kiel Fjord under different salinity levels (2020)
    PANGAEA
    Details
    Publikationsdatum: 2023-01-13
    Schlagwort(e): feeding rates; Hemigrapsus takanoi; Kiel Fjord; larval development; Salinity
    Materialart: Dataset
    Format: application/zip, 3 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
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