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  • 2005-2009  (5)
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  • 1
    Online Resource
    Online Resource
    Growth and calcification in the cephalopod Sepia officinalis under elevated seawater p CO2 (2008)
    Associated volumes
    Details Availability
    In: Marine ecology progress series, Oldendorf/Luhe : Inter-Research, 1979, 373(2008), Seite 303-309, 1616-1599
    In: volume:373
    In: year:2008
    In: pages:303-309
    Description / Table of Contents: Ocean acidification and associated changes in seawater carbonate chemistry negatively influence calcification processes and depress metabolism in many calcifying marine invertebrates. We present data on the cephalopod mollusc Sepia officinalis, an invertebrate that is capable of not only maintaining calcification, but also growth rates and metabolism when exposed to elevated partial pressures of carbon dioxide (pCO 2). During a 6 wk period, juvenile S. officinalis maintained calcification under ~4000 and ~6000 ppm CO 2, and grew at the same rate with the same gross growth efficiency as did control animals. They gained approximately 4% body mass daily and increased the mass of their calcified cuttlebone by over 500%. We conclude that active cephalopods possess a certain level of pre-adaptation to long-term increments in carbon dioxide levels. Our general understanding of the mechanistic processes that limit calcification must improve before we can begin to predict what effects future ocean acidification will have on calcifying marine invertebrates.
    Type of Medium: Online Resource
    Pages: graph. Darst
    ISSN: 1616-1599
    URL: http://dx.doi.org/10.3354/meps07782
    DOI: 10.3354/meps07782
    Language: English
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  • 2
    Article
    Article
    CO2 nur ein Klimafaktor? : Wirkung auf Meerestiere (2006)
    Bremen : Hauschild
    Associated volumes
    Details Availability
    In: Faszination Meeresforschung, Bremen : Hauschild, 2006, (2006), Seite 292-300, 3897573105
    In: 9783897573109
    In: year:2006
    In: pages:292-300
    Type of Medium: Article
    Language: German
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  • 3
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    Growth and calcification in the cephalopod Sepia officinalis under elevated seawater pCO(2) (2008)
    Inter Research
    In:  Marine Ecology Progress Series, 373 . pp. 303-309.
    Details
    Publication Date: 2019-09-23
    Description: Ocean acidification and associated changes in seawater carbonate chemistry negatively influence calcification processes and depress metabolism in many calcifying marine invertebrates. We present data on the cephalopod mollusc Sepia officinalis, an invertebrate that is capable of not only maintaining calcification, but also growth rates and metabolism when exposed to elevated partial pressures of carbon dioxide (pCO(2)). During a 6 wk period, juvenile S. officinalis maintained calcification under similar to 4000 and similar to 6000 ppm CO2, and grew at the same rate with the same gross growth efficiency as did control animals. They gained approximately 4%, body mass daily and increased the mass of their calcified cuttlebone by over 500 %. We conclude that active cephalopods possess a certain level of pre-adaptation to long-term increments in carbon dioxide levels. Our general understanding of the mechanistic processes that limit calcification must improve before we can begin to predict what effects future ocean acidification will have on calcifying marine invertebrates.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    DOI: 10.3354/meps07782
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    The cuttlefish Sepia officinalis L. (Mollusca: Cephalopoda) in the English Channel and the Bay of Biscay - is there a single panmictic population? (2006)
    In:  [Poster] In: SEB Annual Main Meeting, 2nd-7th April 2006, Canterbury, UK. .
    Details
    Publication Date: 2021-08-27
    Description: Population substructure of the cuttlefish Sepia officinalis (Mollusca: Cephalopoda), as investigated by genetic variation of microsatellite loci, has been reported to be extensively variable around the Iberian Peninsula (Pérez-Losada et al., 2002) and panmictic in the semienclosed Adriatic Sea (Garoia et al., 2004). Yet, no verified genetic information on population substructuring existed for the northern distribution range of this species in the English Channel and Bay of Biscay.So far, reproductive and migration behaviour and in-vitro oxygen binding properties of haemocyanin have suggested separate populations in the English Channel and the Bay of Biscay. However, extensive examination of genetic variation at seven microsatellite loci indicated no significant differences between cuttlefishes from both areas. The revealed degree of genetic variation at the screened loci is comparable to the panmictic population of S. officinalis in the Adriatic Sea (Garoia et al., 2004). S. officinalis in the English Channel and the Bay of Biscay should thus also be regarded as a panmictic population.Garoia, F et al. (2004). Heredity, 93: 166-174.Pérez-Losada, M et al. (2002). Heredity, 89(6): 417-424.
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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    OceanRep: Poster
  • 5
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    Temperature-dependent oxygen extraction from the ventilatory current and the costs of ventilation in the cephalopod Sepia officinalis (2006)
    Springer
    In:  Journal of Comparative Physiology B, 176 (7). pp. 607-621.
    Details
    Publication Date: 2021-09-03
    Description: Earlier work found cuttlefish (Sepia officinalis) ventilatory muscle tissue to progressively switch to an anaerobic mode of energy production at critical temperatures (T c) of 7.0 and 26.8°C. These findings suggested that oxygen availability limits thermal tolerance. The present study was designed to elucidate whether it is the ventilatory apparatus that sets critical temperature thresholds during acute thermal stress. Routine metabolic rate (rmr) rose exponentially between 11 and 23°C, while below (8°C) and above (26°C) this temperature range, rmr was significantly depressed. Ventilation frequency (f V) and mean mantle cavity pressure (MMP) followed an exponential relationship within the entire investigated temperature range (8–26°C). Oxygen extraction from the ventilatory current (EO2) decreased in a sigmoidal fashion with temperature, falling from 〉 90% at 8°C to 32% at 26°C. Consequently, ventilatory minute volume (MVV) increased by a factor of 20 from 7 to 150% body weight min−1 in the same temperature interval. Increases in MMP and MVV resulted in ventilatory muscle power output (P out) increasing by a factor of 〉 80 from 0.03 to 2.4 mW kg−1 animal. Nonetheless, costs for ventilatory mechanics remain below 1.5% rmr in the natural thermal window of the population (English Channel, 9–17°C), owing to very low MMPs of 〈 0.05 kPa driving the ventilatory stream, and may maximally rise to 8.6% rmr at 26°C. Model calculations suggest that the ventilatory system can maintain high arterial PO2 values of 〉 14 kPa over the entire temperature interval. We therefore conclude that the cuttlefish ventilation system is probably not limiting oxygen transfer during acute thermal stress. Depression of rmr, well before critical temperatures are being reached, is likely caused by circulatory capacity limitations and not by fatigue of ventilatory muscle fibres.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s00360-006-0084-9
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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