Passage of Hæmoglobin from Blood into Eggs of Daphnia

Dresel, E. I. B.

doi:10.1038/162736b0

Cited by 33 publications

(10 citation statements)

References 3 publications

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“…Fox (1948) reported that hemoglobin never occurs in lake-dwelling Daphnia but only in those species populations found in small ponds or ditches. Since traces of hemoglobin can be found in the parthenogenetic eggs of lake-dwelling Daphnia species ( Dresel 1948), it is known that these species can produce hem~globin, although they are almost always clear.…”

Section: Discussionmentioning

confidence: 99%

Effect of Varying Oxygen Concentrations on the Filtering Rate of Daphnia Pulex

Kring¹,

O’Brien²

1976

Ecology

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Knowledge of factors affecting feeding efficiency is of vital importance to understanding any organism's relationship to its environment. The present study reports on the effect of one factor–variation in O_2 concentration–on the filtering rate of a common freshwater zooplankton species, Daphnia pulex. Measurements of D. pulex filtering rate were made under exposure to a wide range of O_2 concentrations and over periods of time ranging from < 1 h to 15 days. Oxygen was found to have a significant effect on the filtering rate in that below concentrations of 3 mg O_2/l the rate decreased sharply; however, following prolonged exposure (> 8—12 h) to low O_2 conditions the filtering rate gradually increased and eventually D. pulex were able to filter much more rapidly than under normal O_2 concentrations. These increases in filtering rates under conditions of low O_2 are directly correlated with the animals' increased production of hemoglobin when little O_2 is present.

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Section: Discussionmentioning

confidence: 99%

Effect of Varying Oxygen Concentrations on the Filtering Rate of Daphnia Pulex

Kring¹,

O’Brien²

1976

Ecology

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“…In our 20°C-acclimated D. magna, haemoglobin concentrations of 127 ± 25 µmol·L -1 in pale animals and 519 ± 113 µmol·L -1 in red animals were measured. Like oxygen consumption and heart rate, the haemoglobin concentration in D. magna depends on various factors, including the extent and duration of hypoxic incubation (Kring and O'Brien 1976;Carvalho 1984;Kobayashi et al 1990b), food availability, maternal effects, moulting, and reproduction (e.g., Dresel 1948;Fox et al 1949;Green 1956;Kobayashi et al 1990a). Moreover, the ability to synthesize haemoglobin can vary considerably among clones (Weider and Lampert 1985).…”

Section: Temperature Acclimation and Hypoxia-induced Effectsmentioning

confidence: 97%

Temperature acclimation influences temperature-related behaviour as well as oxygen-transport physiology and biochemistry in the water fleaDaphnia magna

Lamkemeyer¹,

Zeis²,

Paul³

2003

Can. J. Zool.

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To evaluate the role of temperature in oxygen transport in the water flea Daphnia magna, temperaturerelated behaviour as well as oxygen-transport physiology and biochemistry were investigated in animals long-term acclimated to moderate temperatures: 10, 20, or 30°C (normoxia) or 20°C (hypoxia). Study of the behaviour of animal groups within a normoxic thermal gradient showed their preferred temperatures and distribution patterns to be connected with acclimation conditions; for example, cold-acclimated individuals, with their relatively high metabolic rates and low oxygen-transport capacities, crowded at low temperatures where the oxygen concentration was high. One key to explaining these data is to assume a strategy of avoiding oxygen shortage. Both temperature and hypoxia acclimation also modified oxygen-transport variables such as oxygen consumption, ventilation and circulation rates, or the concentration and oxygen affinity of haemoglobin. Characteristic features of cold-acclimated D. magna were relatively high oxygen-consumption and heart rates and a low concentration and oxygen affinity of haemoglobin. Hypoxia-acclimated D. magna showed relatively low convective rates (frequency of thoracic-limb movements, heart rate) but a high concentration and oxygen affinity of haemoglobin. Additional experiments showed that independently of each other, temperature and ambient oxygen concentration modify haemoglobin quantity and quality, the former possibly acting via a temperature-induced hypoxia. The varying oxygen affinity is probably due to alterations of haemoglobin subunit composition, with the particular participation of subunits A, E, and G as revealed by two-dimensional gel electrophoresis.Résumé : L'étude du comportement relié à la température ainsi que de la physiologie et de la biochimie du transport de l'oxygène chez des cladocères Daphnia magna acclimatés à long terme à des températures modérées -10, 20, 30°C (en normoxie) ou 20 EC (en anoxie) -nous a permis d'évaluer le rôle de la température en rapport avec le transport de l'oxygène. Le comportement de groupes d'animaux dans un gradient thermique normoxique montre que les choix de température et les patterns de répartition sont reliés aux conditions d'acclimatation; par exemple, les individus acclimatés au froid, qui ont des taux métaboliques relativement élevés et des capacités réduites de transport d'oxygène, se regroupent dans les zones de température préférentielle basse où les concentrations d'oxygène sont éle-vées. Une façon d'expliquer ces données est d'assumer qu'il y a une stratégie d'évitement des pénuries d'oxygène. L'acclimatation tant à la température qu'à l'hypoxie modifie aussi les variables reliées au transport de l'oxygène, telles que la consommation d'oxygène, les taux de ventilation et de circulation ou alors la concentration de l'hémoglobine et son affinité pour l'oxygène. Les caractéristiques des cladocères acclimatés au froid comprennent une consommation d'oxygène et un rythme cardiaque relativement élevés et une concentration basse ...

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“…The level of haemoglobin in the blood of parthenogenetically reproducing Daphnia fluctuates over the course of each instar. Up to one-third of an ovigerous female's haemoglobin passes into ovaries and eggs just before moulting takes place and eggs are laid into the brood chamber (Fox, Hardcastle & Dresel, 1949;Green, 1956;Dresel, 1948). As the eggs develop, more haemoglobin is produced by the female.…”

Section: Maternal Haemoglobin and Egg Developmentmentioning

confidence: 99%

The production of hemoglobin by small pond Daphnia pulex: intraspecific variation and its relation to habitat

Engle¹

1985

Freshwater Biology

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SUMMARY. Hemoglobin production was measured for two populations of Daphnia pulex, one from a temporary pond (GR Pond) and one from a permanent pond (Rash Pond). Surface water in Rash Pond remains high in oxygen, while by late summer very little oxygen remains in GR Pond. Hemoglobin synthesis was induced in the laboratory by artificial oxygen deficiency. Reproductive state influenced the level of hemoglobin in Daphnia. Females with parthenogenesis eggs had higher total body hemoglobin than ephippial females. Clutches laid by pale Daphnia immediately before exposure to low oxygen conditions were aborted. Offspring produced by hemoglobin‐rich females later in the treatment survived. Hemoglobin production was higher for Rash Pond Daphnia. Visual predators exist in GR Pond, but are absent in Rash Pond. Also, Daphnia are smaller in GR Pond. Visual predation may have selected against high levels of hemoglobin in the temporary pond. Thus oxygen availability in nature is not necessarily a good predictor of hemoglobin production by Daphnia. Feeding behavior was altered in low oxygen conditions. Browsing was dominant in low oxygen treatments while Daphnia in control treatments filtered algae normally. Browsing may increase access to sedimented iron necessary for hemoglobin synthesis.

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Passage of Hæmoglobin from Blood into Eggs of Daphnia

Cited by 33 publications

References 3 publications

Effect of Varying Oxygen Concentrations on the Filtering Rate of Daphnia Pulex

Effect of Varying Oxygen Concentrations on the Filtering Rate of Daphnia Pulex

Temperature acclimation influences temperature-related behaviour as well as oxygen-transport physiology and biochemistry in the water fleaDaphnia magna

The production of hemoglobin by small pond Daphnia pulex: intraspecific variation and its relation to habitat

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