Respiratory rate, haemolymph oxygen tension and haemocyanin level in the shrimp Palaemon adspersus Rathke
Hagerman, L.; Weber, R.E. (1981). Respiratory rate, haemolymph oxygen tension and haemocyanin level in the shrimp Palaemon adspersus Rathke. J. Exp. Mar. Biol. Ecol. 54(1): 13-20
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981; e-ISSN 1879-1697, more
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| Keywords |
Hemocyanins
Hemolymph
Oxygen consumption
Respiration
Palaemon adspersus Rathke, 1836 [WoRMS]
Marine/Coastal |
| Authors | | Top |
- Hagerman, L., more
- Weber, R.E.
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| Abstract |
The marine shrimp Palaemon adspersus Rathke, frequenting Zostera meadows, shows an oxygen consumption rate (MO2) that is independent of water oxygen tension (PwO2) as PO2 decreases to a critical point (Pcr) near 70 mm Hg. This respiratory independence is associated with maintenance of a relatively constant "arterial" (post-branchial) haemolymph tension (PaO2) at 70-80 mm Hg. At lower PwO2 values, both MO2 and PaO2 fall, reflecting, in contrast to the above independence, a direct dependence of MO2 on internal PO2. Haemolymph copper measurements demonstrate relatively high haemocyanin concentrations and oxygen-carrying capacities, but MO2 levels reflect an insignificant role for the pigment as an oxygen store. The data are discussed as regards adaptations for aerobic metabolism. |
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