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  • 1
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    Effects of ocean acidification on nektonic organisms. In: Ocean Acidification (ed. J.-P. Gattuso, L. Hansson). (2011)
    In:  EPIC3Oxford University Press, Oxford.
    Details
    Publication Date: 2019-07-16
    Repository Name: EPIC Alfred Wegener Institut
    Type: Inbook , peerRev
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 2
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    Seawater carbonate chemistry and processes during experiments with Crassostrea gigas, 2007 (2007)
    PANGAEA
    In:  Supplement to: Kurihara, Haruko; Kato, Shoji; Ishimatsu, Atsushi (2007): Effects of increased seawater pCO2 on early development of the oyster Crassostrea gigas. Aquatic Biology, 1(1), 91-98, https://doi.org/10.3354/ab00009
    Details
    Publication Date: 2024-03-15
    Description: This study demonstrated that the increased partial pressure of CO2 (pCO2) in seawater and the attendant acidification that are projected to occur by the year 2300 will severely impact the early development of the oyster Crassostrea gigas. Eggs of the oyster were artificially fertilized and incubated for 48 h in seawater acidified to pH 7.4 by equilibrating it with CO2-enriched air (CO2 group), and the larval morphology and degree of shell mineralization were compared with the control treatment (air-equilibrated seawater). Only 5% of the CO2 group developed into normal 'D-shaped' veliger larvae as compared with 68% in the control group, although no difference was observed between the groups up to the trochophore stage. Thus, during embryogenesis, the calcification process appears to be particularly affected by low pH and/or the low CaCO3 saturation state of high-CO2 seawater. Veliger larvae with fully mineralized shells accounted for 30% of the CO2-group larvae, compared with 72% in the control (p 〈 0.005). Shell mineralization was completely inhibited in 45% of the CO2-group larvae, but only in 16% of the control (p 〈 0.05). Normal D-shaped veligers of the control group exhibited increased shell length and height between 24 and 48 h after fertilization, while the few D-shaped veligers of the CO2 group showed no shell growth during the same period. Our results suggest that future ocean acidification will have deleterious impacts on the early development of marine benthic calcifying organisms.
    Keywords: Alkalinity, total; Animalia; Aragonite saturation state; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Crassostrea gigas; Crassostrea gigas, fully mineralized; Crassostrea gigas, larvae height; Crassostrea gigas, larvae length; Crassostrea gigas, non mineralized; Crassostrea gigas, partially mineralized; Development; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; EXP; Experiment; Experimental treatment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Kurihara_etal_07; Laboratory experiment; Measured; Mollusca; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH meter (Mettler Toledo, USA); pH meter (PHM290, Radiometer); Proportion; Refractometer (Atago 100-S); Salinity; Single species; Temperate; Temperature, water; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 2170 data points
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    DATA PANGAEA
  • 3
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    Seawater carbonate chemistry and early development of the oyster Crassostrea gigas (2008)
    PANGAEA
    Details
    Publication Date: 2024-03-15
    Description: We investigated the effects of seawater equilibrated with CO2-enriched air (2000 ppm, pH 7.4) on the early development of the mussel Mytilus galloprovincialis. Mussel embryos were incubated for 144 h (6 d) in control and high-CO2 seawater to compare embryogenesis, larval growth and morphology with ordinary light, polarized light, and scanning electron microscopy. Embryogenesis was unaffected by exposure to high-CO2 seawater up to the trochophore stage, but development at the trochophore stage was delayed when the shell began to form. All veliger larvae of the high-CO2 group showed morphological abnormalities such as convex hinge, protrusion of the mantle and malformation of shells. Larval height and length were 26 +- 1.9% and 20 +- 1.1% smaller, respectively, in the high-CO2 group than in the control at 144 h. These results are consistent with our previous findings of CO2 effects on early development of the oyster Crassostrea gigas, although the severity of CO2 damage appears to be less in M. galloprovincialis, possibly due to differing spawning seasons (oyster: summer; mussel: winter). Results from this and the previous study indicate that high CO2 (2000 ppm) interferes with early development, particularly with larval shell synthesis, of bivalves; however, vulnerability to high CO2 differs between species. Taken together with recent studies demonstrating negative impacts of high CO2 on adult mussels and oysters, results imply a future decrease of bivalve populations in the oceans, unless acclimation to the predicted environmental alteration occurs.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calcium ion; 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; Carbon dioxide, standard deviation; Coast and continental shelf; Development; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Growth/Morphology; Height; Height, standard deviation; Laboratory experiment; Length; Length, standard deviation; Mollusca; Mytilus galloprovincialis; Nagasaki_University; North Pacific; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; Percentage; Percentage, standard deviation; pH; pH, standard deviation; Potentiometric; Potentiometric titration; Registration number of species; Salinity; Salinity, standard deviation; Single species; Species; Stage; Status; Temperate; Temperature, water; Temperature, water, standard deviation; Time in hours; Treatment; Type; Uniform resource locator/link to reference; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 4642 data points
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    DATA PANGAEA
  • 4
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    Seawater carbonate chemistry and hatch rates of Antarctic krill (2013)
    PANGAEA
    In:  Supplement to: Kawaguchi, So; Ishida, Akio; King, Rob; Raymond, Ben; Waller, N; Constable, A; Nicol, Steven; Wakita, M; Ishimatsu, Atsushi (2013): Risk maps for Antarctic krill under projected Southern Ocean acidification. Nature Climate Change, 3(9), 843-847, https://doi.org/10.1038/nclimate1937
    Details
    Publication Date: 2024-03-15
    Description: Marine ecosystems of the Southern Ocean are particularly vulnerable to ocean acidification. Antarctic krill (Euphausia superba; hereafter krill) is the key pelagic species of the region and its largest fishery resource. There is therefore concern about the combined effects of climate change, ocean acidification and an expanding fishery on krill and ultimately, their dependent predators-whales, seals and penguins. However, little is known about the sensitivity of krill to ocean acidification. Juvenile and adult krill are already exposed to variable seawater carbonate chemistry because they occupy a range of habitats and migrate both vertically and horizontally on a daily and seasonal basis. Moreover, krill eggs sink from the surface to hatch at 700-1,000 m, where the carbon dioxide partial pressure (pCO2) in sea water is already greater than it is in the atmosphere. Krill eggs sink passively and so cannot avoid these conditions. Here we describe the sensitivity of krill egg hatch rates to increased CO2, and present a circumpolar risk map of krill hatching success under projected pCO2 levels. We find that important krill habitats of the Weddell Sea and the Haakon VII Sea to the east are likely to become high-risk areas for krill recruitment within a century. Furthermore, unless CO2 emissions are mitigated, the Southern Ocean krill population could collapse by 2300 with dire consequences for the entire ecosystem.
    Keywords: Alkalinity, total; Animalia; Antarctic; Aragonite saturation state; Arthropoda; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Eggs; Eggs, hatched; Eggs, unhatched; Euphausia superba; EXP; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Identification; Laboratory experiment; OA-ICC; Ocean Acidification International Coordination Centre; Open ocean; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Polar; Potentiometric; Potentiometric titration; Replicate; Reproduction; Salinity; Salinity, standard deviation; Single species; Southern_Ocean_OA; Species; Temperature, standard deviation; Temperature, water; Treatment; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 9576 data points
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    DATA PANGAEA
  • 5
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    Combined effects of short-term ocean acidification and heat shock in a benthic copepod Tigriopus japonicus Mori (2015)
    PANGAEA
    In:  Supplement to: Li, Wei; Han, Guodong; Dong, Yunwei; Ishimatsu, Atsushi; Russell, Bayden D; Gao, Kunshan (2015): Combined effects of short-term ocean acidification and heat shock in a benthic copepod Tigriopus japonicus Mori. Marine Biology, 162(9), 1901-1912, https://doi.org/10.1007/s00227-015-2722-9
    Details
    Publication Date: 2024-03-15
    Description: Warming of the world's oceans is predicted to have many negative effects on organisms as they have optimal thermal windows. In coastal waters, however, both temperatures and pCO2 (pH) exhibit diel variations, and biological performances are likely to be modulated by physical and chemical environmental changes. To understand how coastal zooplankton respond to the combined impacts of heat shock and increased pCO2, the benthic copepod Tigriopus japonicus were treated at temperatures of 24, 28, 32 and 36 °C to simulate natural coastal temperatures experienced in warming events, when acclimated in the short term to either ambient (LC, 390 µatm) or future CO2 (HC, 1000 µatm). HC and heat shock did not induce any mortality of T. japonicus, though respiration increased up to 32 °C before being depressed at 36 °C. Feeding rate peaked at 28 °C but did not differ between CO2 treatments. Expression of heat shock proteins (hsps mRNA) was positively related to temperature, with no significant differences between the CO2 concentrations. Nauplii production was not affected across all treatments. Our results demonstrate that T. japonicus responds more sensitively to heat shocks rather than to seawater acidification; however, ocean acidification may synergistically act with ocean warming to mediate the energy allocation of copepods.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Arthropoda; Behaviour; Bicarbonate ion; Bicarbonate ion, standard deviation; Calcite saturation state; 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; Carbon dioxide, standard deviation; Coast and continental shelf; Containers and aquaria (20-1000 L or 〈 1 m**2); EXP; Experiment; Factor quantifying temperature dependent change of rates of processes; Factor quantifying temperature dependent change of rates of processes, standard deviation; Feeding rate, standard deviation; Feeding rate of cells per individuum; Filtering rate; Filtering rate, standard deviation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; North Pacific; 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; Potentiometric; Registration number of species; Respiration; Respiration rate, oxygen, per individual; Respiration rate, oxygen, standard deviation; Salinity; Single species; Species; Temperate; Temperature; Temperature, water; Tigriopus japonicus; Treatment; Type; Uniform resource locator/link to reference; Xiamen_Bay; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 714 data points
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    DATA PANGAEA
  • 6
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    Seawater carbonate chemistry and reproductive properties of the benthic copepod Tigriopus japonicus and gastropod Babylonia japonica in a laboratory experiment (2013)
    PANGAEA
    In:  Supplement to: Kita, Jun; Kikkawa, Takashi; Asai, Takamasa; Ishimatsu, Atsushi (2013): Effects of elevated pCO2 on reproductive properties of the benthic copepod Tigriopus japonicus and gastropod Babylonia japonica. Marine Pollution Bulletin, 73(2), 402-408, https://doi.org/10.1016/j.marpolbul.2013.06.026
    Details
    Publication Date: 2024-04-06
    Description: We investigated the effects of elevated pCO2 in seawater both on the acute mortality and the reproductive properties of the benthic copepod Tigriopus japonicus and gastropod Babylonia japonica with the purpose of accumulating basic data for assessing potential environmental impacts of sub-sea geological storage of anthropogenic CO2 in Japan. Acute tests showed that nauplii of T. japonicus have a high tolerance to elevated pCO2 environments. Full life cycle tests on T. japonicus indicated NOEC = 5800 µatm and LOEC = 37,000 µatm. Adult B. japonica showed remarkable resistance to elevated pCO2 in the acute tests. Embryonic development of B. japonica showed a NOEC = 1500 µatm and LOEC = 5400 µatm. T. japonicus showed high resistance to elevated pCO2 throughout the life cycle and B. japonica are rather sensitive during the veliger stage when they started to form their shells.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Arthropoda; Babylonia japonica; Benthic animals; Benthos; Bicarbonate ion; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Containers and aquaria (20-1000 L or 〈 1 m**2); Development; Duration, number of days; Eggs; Embryos, per egg capsules; Embryos, per egg capsules, standard deviation; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Hatching rate; Hatching rate, standard deviation; Identification; Laboratory experiment; Laboratory strains; Life stage; Male; Mollusca; Number of spawning events; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Potentiometric; Potentiometric titration; Reproduction; Salinity; Salinity, standard deviation; Single species; South Pacific; Spawning times, per spawned females; Spawning times, per spawned females, standard deviation; Species; Temperature, water; Temperature, water, standard deviation; Tigriopus japonicus; Undeveloped embryos/capsule ratio; Undeveloped embryos/capsule ratio, standard deviation; Zooplankton
    Type: Dataset
    Format: text/tab-separated-values, 1960 data points
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    DATA PANGAEA
  • 7
    Electronic Resource
    Electronic Resource
    Improved Seed Production of Goldstriped Amberjack Seriola lalandi under Hatchery Conditions by Injection of Triiodothyronine (T3) to Broodstock Fish (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the World Aquaculture Society 28 (1997), S. 0 
    Details
    ISSN: 1749-7345
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Survival of the seed of goldstriped amberjack Seriola lalandi was consistently enhanced by intramuscular injection of triiodothyronine (T3) to the broodstock fish at a dose of 20 mg/kg body weight. Survival rates at the time of transfer to net cages (35 d after hatching) were 2.6–5.0% for the T3 treatment while only 0.3–2.1% for the control. Survival rates 36 mo after hatching was estimated to be 12 times higher in the T3-treated group (1.1%) than in the control (0.09%). T3 concentration in newly spawned eggs increased from control levels of 0.3–1.0 ng/g to 68–127 ng/g 2 d after injection and subsided with successive spawns. T3 concentration in the treated larvae was about 360 times higher than in the control upon hatching (29 np/p vs 0.08 ng/g), but became indistinguishable from the control 6 d after hatching. These results indicate injection of T3 to the broodstock of S. lalndi to be of practical value in aquaculture of the species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-7345.1997.tb00959.x
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Mudskippers store air in their burrows (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 391 (1998), S. 237-238 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Mudskipper fishes can maintain their metabolism while they are confined in mudflat burrows filled with oxygen-depleted water, and their eggs, deposited in the burrows, can develop under severely hypoxic conditions. How they cope with such conditions has been unclear. We report here that a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/34560
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  • 9
    Electronic Resource
    Electronic Resource
    Site of acid-base relevant ion transfer in the gills of rainbow trout (Oncorhynchus mykiss) exposed to environmental hypercapnia (1993)
    Springer
    Fish physiology and biochemistry 12 (1993), S. 269-280 
    Details
    ISSN: 1573-5168
    Keywords: central venous sinus ; rainbow trout ; gill blood-flow ; acid-base regulation ; gill blood flow partitioning ; hypercapnia ; secondary circulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to delineate the contribution of primary vs. secondary circulatory circuits in the gill for acid-base and ionic regulation, the flow and composition of the fluids in the central venous sinus (CVS) and the systemic circuit of rainbow trout were studied by application of a previously developed microcannulation technique during normocapnic and hypercapnic conditions. The average haematocrit (Hct) of blood from dorsal aorta (DA) and sinus venosus (SV) ranged from 20.1 to 26.7%, whereas average Hct in the fluid from the branchial vein (BV), representing drainage from the central venous sinus (CVS), was in the range of 4.2 to 7.0%. Under normocapnic conditions, the largest fraction of cardiac output, 92.9%, was directed through the systemic vascular circuit, whereas the CVS circuit was perfused with 7.1 % of cardiac output. Hypercapnia did not significantly affect the blood flow distribution between the two circuits. The pattern of acid-base regulation in dorsal aortic blood reflected the characteristic response of fish exposed to environmental hypercapnia. Upon initiation of environmental hypercapnia (2% CO2), plasma PCO 2 was elevated in all three flow compartments (CVS, DA, SV), inducing an extracellular respiratory acidosis of about 0.4 pH units. pH and [HCO3 -] values in the DA were consistently lower, than those for both CVS and SV sites throughout the hypercapnic period. During the 8h of exposure plasma bicarbonate concentration was elevated by about 12 mM, complemented by a fall in extracellular [Cl-] of about 10 mM in all three compartments. The amount of HCO3 - gained at the CVS site during 8h of hypercapnia (3.3 mmol · kg-1) exceeds the amount accumulated in the extracellular space (2.1 mmol·kg-1), suggesting the CVS as the main site of ionic acid-base regulation in trout.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00004412
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  • 10
    Electronic Resource
    Electronic Resource
    Difference in blood oxygen levels in the outflow vessels of the heart of an air-breathing fish,Channa argus: Do separate blood streams exist in a teleostean heart? (1983)
    Springer
    Journal of comparative physiology 149 (1983), S. 435-440 
    Details
    ISSN: 1432-136X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Blood gas analysis indicated the existence of separate blood streams in the heart of an air-breathing teleost,Channa argus, in spite of the total lack of morphological septation. The heart of this fish has two ventral aortae. The blood of lower oxygen level is conveyed in one aorta connecting to the developed gills of the 2st and 2nd gill arches. Effluent blood from these two arches constitutes afferent blood supply to the air-breathing organ, from which the blood is returned to the heart. The blood of higher oxygen level is conveyed in the other aorta connecting to the entire systemic vascular beds through the reduced 3rd and 4th gill arches.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00690000
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