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Hemolymph oxyhemocyanin, protein, osmolality and electrolyte...

Summary citation from AGRICOLA, the online catalog of the National Agricultural Library (NAL)

Hemolymph oxyhemocyanin, protein, osmolality and electrolyte levels of Macrobrachium rosenbergii in relation to size and molt stage.

The giant river prawn, Macrobrachium rosenbergii (De Man), was examined for hemolymph oxyhemocyanin, protein, osmotic and ion concentrations in relation to sex, size and molt stage. No significant differences in hemolymph variables were observed between males and females with body weight in the range of 17-48 g. However, male prawns larger than 50 g had significantly lower levels of oxyhemocyanin, and a lower ratio of oxyhemocyanin to protein, Ca(2+) and Mg(2+). With regard to the molt cycle, hemolymph protein and oxyhemocyanin was highest (170.24 mg/ml and 2.01 mmol/l) at stage D1, and lowest (110.18 mg/ml and 1.39 mmol/l) at stage A, respectively. Decreases in hemolymph protein, oxyhemocyanin, osmolality, Cl(-), Na(+), K(+), Mg(2+), and Ca(2+) levels with size indicated that the prawns mature in the culture ponds. The fact that the hemolymph protein, osmolality, Cl(-), Na(+) and K(+) levels were lower during the postmolt, and were higher during intermolt and early premolt, are considered to be associated with water uptake at molt.

Journal Title: Aquaculture.
Journal Volume/Issue: July 2, 2001. v. 198 (3/4)
Main Author: Cheng, W.
Other Authors: Liu, C.H., Cheng, C.H.
Format: Article
Language: English
Subjects: Macrobrachium rosenbergii
osmotic pressure
chemical composition
protein content
developmental stages
gender differences
Internet resource
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