The differentiation of blood proteins during ontogeny in Sepia officinalis L

Decleir, W.; Lemaire, Jérémy; Richard, A

doi:10.1016/0305-0491(71)90038-1

Cited by 16 publications

(18 citation statements)

References 10 publications

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“…For molluscs such as Pulmonata spp., a similar temperature effect has been reported (McMahon and Russell-Hunter, 1977). Richard (1971) demonstrated the relationship between temperature and metabolism in Sepia officinalis, and showed that growth is accelerated by ambient water temperature.…”

Section: Discussionmentioning

confidence: 51%

“…Our experiment to reveal a possible biological rhythm of respiration being affected by photoperiod indicated that aerobic metabolism is not influenced, despite the fact that in adult cephalopods light and/or darkness have a marked effect on sexual maturation (Wells and Wells, 1959;Richard, 1971;O'Dor and Wells, 1973). In other molluscs such as Helix pomatia, photoperiod affects the hemolymph composition (potassium concentration), and in most Pulmonata species it affects many aspects of somatic physiology (Meincke, 1972).…”

Section: Discussionmentioning

confidence: 99%

“…In earlier studies it has been demonstrated with electrophoretic and immunological procedures that the blood of embryos contains respiratory pigments, the so called pre-hemocyanins (pre-Hcns) (Decleir et al, 1971;Wolf et al, 1980) from at least Stage 18. Many of these embryonic pre-Hcns are still present in juveniles, but they are replaced by the adult molecule within _+ 70 d after eclosion.…”

Section: Introductionmentioning

confidence: 99%

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Respiration of Sepia officinalis during embryonic and early juvenile life

et al. 1985

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Adult Sepia officinalis L. were caught in June 1984, in the coastal waters of Wimereux (France). Deposition of the eggs took place in the seawater aquaria of the "Station Mafine". The oxygen consumption of S. officinalis was measured during embryonic and juvenile development. Aerobic metabolism occurs as soon as the early embryonic Stage 21. Oxygen diffuses through the initially thick egg shell; the oxygen level in the perivitelline liquid reaches a maximal value just before hatching (116.7 + 6.9 mm Hg). Hatchlings display only a slight increase in oxygen consumption compared to embryos in the last stage of development. Respiration experiments with 40 d old juveniles showed that oxygen consumption increases with temperature, but is not affected by photoperiod. Experiments under increasing hypoxia revealed that S. officinalis juveniles are good regulators and maintain a constant oxygen consumption in the range of 4 to 7 mg 02 1-1. Juveniles successfully recover from an hypoxic stress of 2 mg O2 1-1 maintained for 1 h. This suggests that the respiratory pigments (pre-hemocyanins) of 40 d-old juveniles have a high oxygen affinity and/or that these juveniles have the ability to adapt to anaerobic conditions.

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Section: Discussionmentioning

confidence: 51%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Respiration of Sepia officinalis during embryonic and early juvenile life

et al. 1985

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“…It would be quite rewarding to study blood pH regulation in embryos under such conditions, as cephalopods are known for the high pH sensitivity of their extracellular respiratory pigment hemocyanin (Melzner et al 2007). The occurrence of special embryonic hemocyanins (Decleir et al 1971) may be one adaptation to the high pCO 2 values encountered during late embryogenesis.…”

Section: Pvf Oxygen Partial Pressuresmentioning

confidence: 99%

Abiotic conditions in cephalopod (Sepia officinalis) eggs: embryonic development at low pH and high pCO2

Gutowska

Melzner

2009

Mar Biol

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Low pO 2 values have been measured in the perivitelline fluids (PVF) of marine animal eggs on several occasions, especially towards the end of development, when embryonic oxygen consumption is at its peak and the egg case acts as a massive barrier to diffusion. Several authors have therefore suggested that oxygen availability is the key factor leading to hatching. However, there have been no measurements of PVF pCO 2 so far. This is surprising, as elevated pCO 2 could also constitute a major abiotic stressor for the developing embryo. As a first attempt to fill this gap in knowledge, we measured pO 2 , pCO 2 and pH in the PVF of late cephalopod (Sepia officinalis) eggs. We found linear relationships between embryo wet mass and pO 2 , pCO 2 and pH. pO 2 declined from [12 kPa to less than 5 kPa, while pCO 2 increased from 0.13 to 0.41 kPa. In the absence of active accumulation of bicarbonate in the PVF, pH decreased from 7.7 to 7.2. Our study supports the idea that oxygen becomes limiting in cephalopod eggs towards the end of development; however, pCO 2 and pH shift to levels that have caused significant physiological disturbances in other marine ectothermic animals. Future research needs to address the physiological adaptations that enable the embryo to cope with the adverse abiotic conditions in their egg environment.

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“…Coupled with special physiological adaptations (e.g. embryonic hemocyanins; Decleir et al, 1971), powerful net proton excretion mechanisms can be expected to be present already in these early life stages to cope with high perivitelline fluid pCO 2 . Whether these high perivitelline fluid pCO 2 values render late embryonic stages of S. officinalis more vulnerable to additional hypercapnic stress in a progressively acidic ocean, needs to be determined.…”

Section: Ontogenetic Hypercapnia: the Hostile Environment Within Egg mentioning

confidence: 99%

Physiological basis for high CO<sub>2</sub> tolerance in marine ectothermic animals: pre-adaptation through lifestyle and ontogeny?

et al. 2009

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Abstract. Future ocean acidification has the potential to adversely affect many marine organisms. A growing body of evidence suggests that many species could suffer from reduced fertilization success, decreases in larval-and adult growth rates, reduced calcification rates, and even mortality when being exposed to near-future levels (year 2100 scenarios) of ocean acidification. Little research focus is currently placed on those organisms/taxa that might be less vulnerable to the anticipated changes in ocean chemistry; this is unfortunate, as the comparison of more vulnerable to more tolerant physiotypes could provide us with those physiological traits that are crucial for ecological success in a future ocean. Here, we attempt to summarize some ontogenetic and lifestyle traits that lead to an increased tolerance towards high environmental pCO 2 . In general, marine ectothermic metazoans with an extensive extracellular fluid volume may be less vulnerable to future acidification as their cells are already exposed to much higher pCO 2 values (0.1 to 0.4 kPa, ca. 1000 to 3900 µatm) than those of unicellular organisms and gametes, for which the ocean (0.04 kPa, ca. 400 µatm) is the extracellular space. A doubling in environmental pCO 2 therefore only represents a 10% change in extracellular pCO 2 in some marine teleosts. High extracellular pCO 2 values are to some degree related to high metabolic rates, as diffusion gradients need to be high in order to excrete an amount of CO 2 that is directly proportional to the amount of O 2 consumed. In active metazoans, such as teleost fish, cephalopods and Correspondence to: F. Melzner (fmelzner@ifm-geomar.de) many brachyuran crustaceans, exercise induced increases in metabolic rate require an efficient ion-regulatory machinery for CO 2 excretion and acid-base regulation, especially when anaerobic metabolism is involved and metabolic protons leak into the extracellular space. These ion-transport systems, which are located in highly developed gill epithelia, form the basis for efficient compensation of pH disturbances during exposure to elevated environmental pCO 2 . Compensation of extracellular acid-base status in turn may be important in avoiding metabolic depression. So far, maintained "performance" at higher seawater pCO 2 (>0.3 to 0.6 kPa) has only been observed in adults/juveniles of active, high metabolic species with a powerful ion regulatory apparatus. However, while some of these taxa are adapted to cope with elevated pCO 2 during their regular embryonic development, gametes, zygotes and early embryonic stages, which lack specialized ion-regulatory epithelia, may be the true bottleneck for ecological success -even of the more tolerant taxa.Our current understanding of which marine animal taxa will be affected adversely in their physiological and ecological fitness by projected scenarios of anthropogenic ocean acidification is quite incomplete. While a growing amount of empirical evidence from CO 2 perturbation experiments suggests that several taxa might react quite se...

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The differentiation of blood proteins during ontogeny in Sepia officinalis L

Cited by 16 publications

References 10 publications

Respiration of Sepia officinalis during embryonic and early juvenile life

Respiration of Sepia officinalis during embryonic and early juvenile life

Abiotic conditions in cephalopod (Sepia officinalis) eggs: embryonic development at low pH and high pCO2

Physiological basis for high CO<sub>2</sub> tolerance in marine ectothermic animals: pre-adaptation through lifestyle and ontogeny?

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The differentiation of blood proteins during ontogeny in Sepia officinalis L

Cited by 16 publications

References 10 publications

Respiration of Sepia officinalis during embryonic and early juvenile life

Respiration of Sepia officinalis during embryonic and early juvenile life

Abiotic conditions in cephalopod (Sepia officinalis) eggs: embryonic development at low pH and high pCO2

Physiological basis for high CO&lt;sub&gt;2&lt;/sub&gt; tolerance in marine ectothermic animals: pre-adaptation through lifestyle and ontogeny?

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Physiological basis for high CO<sub>2</sub> tolerance in marine ectothermic animals: pre-adaptation through lifestyle and ontogeny?