| Abstrakt: |
Culture of shrimp was conducted for 120 days of culture at commercial pond at Datardi village, Rajula (Gujarat). Every aquatic animals has their conducive environment, in which they normally grow without any health problem. Any deficiency within body directly affect the normal cellular and organelle function. Shrimp culture activity is usually taken up during summer and monsoon season, this seasonal effect over fatty acid and proximate composition directly affect the total biomass at harvest (kg). Macro and micro nutrients within aquatic medium, helps shrimp to flourish enzymetics action and good growth and survival. This study was conducted and sample of shrimp was collected at harvest period (120 days of culture) from total 18 numbers of culture ponds of size 0.5 ha and depth was 1.8 m. The experiment was conducted in as completely randomized design (CRD) with 6 treatments with 3 replications. Summer crop,treatment and stocking density was represented as S, T1 and 30 nos of shrimp/m²respectively denoted has ST1 30 nos/m² as on for 2nd treatment ST2 40 nos/m², ST3 50 nos/m², ST4 60 nos/m², ST5 70 nos/m² and ST6 80 nos/m² similarly for monsoon crop, represented as MT1 30 nos/m²uptoMT6 80 nos/m². The present study was conducted to evaluate the effect of stocking density on L. vannameiwith the emphasis on biochemical proximate and fatty acid composition. The proximate composition of L.vannameiduring summer and monsoon crop showed higher protein(%) in low stocking density (30 nos/m²)treatment followed by crude fat (%), carbohydrate (%) and Ash (%) in ST1 and MT1 (30 pc/m²). During summer crop, the total 18 fatty acid were detected whereas during monsoon crop 16 fatty acid were detected in all treatment. The results indicated that during summer crop, the L. vannamei shrimp has higher values of SFA, PUFA, MUFA. The total unsaturated fatty acids (USFAs) was higher in treatment ST2 with (66.15 μg/g of FAME) followed by ST3 (66.00ìg/g of FAME), ST6 (65.58 μg/g of FAME), ST4(63.04 μg/g of FAME), ST1 (62.75 μg/g of FAME) and ST5 (62.08 μg/g of FAME), whereas during monsoon crop, the data revealed that the total unsaturated fatty acids (USFAs) was higher than SFAs in treatment MT3 with (59.3 μg/g of FAME) followed by MT1 (58.67 μg/g of FAME), MT4 (57.5 μg/g of FAME), MT2 (56.08 μg/g of FAME), MT5 (43.8 μg/g of FAME) and low in MT6 (34.18 μg/g of FAME). Comparing both the season, summer crop is better than monsoon, as summer crop showed higher level concentration of proximate composition to SFAs/MUFAs and PUFA may be due good quality and quantity of natural feed, water quality and conducive water parameter additionally higher stocking density (no/m²) also affect the level and concentration on proximate composition and fatty acid in both the season. So comparing both season and effect of stocking density of shrimp, there is clear evident that both the factor directly affect the proximate and fatty acid level in L. vannamei cultured shrimp. [ABSTRACT FROM AUTHOR] |
