Dynamics of glucose in the haemolymph of female giant freshwater prawn, Macrobrachium rosenbergii, influences reproductive and non-reproductive moulting cycles
| Autor: | Noraznawati Ismail, Marcy N. Wilder, Mhd Ikhwanuddin, Noor Azlina Kamaruding, Safiah Jasmani |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
medicine.medical_specialty biology Macrobrachium rosenbergii 010604 marine biology & hydrobiology 04 agricultural and veterinary sciences Aquatic Science Carbohydrate metabolism biology.organism_classification 01 natural sciences Gonadosomatic Index Animal science Endocrinology Internal medicine Hemolymph 040102 fisheries medicine Prawn 0401 agriculture forestry and fisheries Vitellogenesis Moulting Histological examination |
| Zdroj: | Aquaculture Research. 48:3505-3514 |
| ISSN: | 1355-557X |
| Popis: | Glucose, when measured in haemolymph, has been found to reflect a useful predictor of energetic investment. This study evaluated the pattern of glucose in the haemolymph, with an attempt to gain a better insight into the role of glucose as nutritional source of ovarian development and energy reserves during reproductive and non-reproductive moulting cycles. The haemolymph of female giant freshwater prawn, Macrobrachium rosenbergii, was obtained at eight different moulting stages, and levels of glucose were determined using an enzymatic colorimetric glucose-oxidase method in parallel with a histological examination of ovarian development. Glucose levels were relatively low (0.15 ± 0.02 mg mL−1) at D0 stage, an abrupt increase (0.52 ± 0.13 mg mL−1) during premoult D1 stage and declined (0.32 ± 0.10 and 0.31 ± 0.09 mg mL−1) during premoult D2 and D3 stages, respectively; thereafter, a slight increase (0.43 ± 0.09 mg mL−1) occurred at post-moult A stage. The progression of ovarian growth, marked by an increasing gonadosomatic index (GSI) pattern during the reproductive moulting cycle (C0–D3 stages), was directly proportionate to fluctuations in glucose levels. GSI was significantly positively correlated with glucose (R = 0.40; P |
| Databáze: | OpenAIRE |
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