Recently, research to explore marine bioactive compounds especially marine medicines and cosmetics shows increasing trend due to the diversity of the chemical structures and their bioactivities. 9 In the

No abstract

The aim of study is to analyze Length-Weight Correlation [LWC] and Condition Factor [CF] of wild spiny lobster juvenile Panulirus spp. (Decapoda: Palinuridae) inhabit in Cilacap waters. Juvenile of spiny lobsters are collected by dives and lighted attractor as juvenile trap from August to October 2018. The spiny lobster juvenile from study site is collected and accommodated in stereo foam box containing sea water and aerated. The juvenile is transported to laboratory and kept in 50×70×50 cm glass box containing sea water, aerated and identified. Total of 231 spiny lobster juveniles were collected and identified were found three species, namely P. homarus (213 individuals), P. versicolor (9 individuals) and P, ornatus (11 individuals). Minimum of CLand weight were found 3.2 mm and 0.01 g; and maximum were obtained 21 mm and 0.52 g. The LWC juvenile was found strong relation and were close to 1. The CF Panulirus spp. juvenile was obtained 0.009865 ± 0.00409 and the CF of P. ornatus was the highest value [0.011218 ± 0.00406] than other species. The habitat of Cilacap coastal waters demonstrated more support to the growth of P. ornatus than the growth of P. homarus and P. versicolor.

In aquaculture, Spirulina platensis is used as feed supplement in which contains amino acid phenylalanine. This study was conducted to evaluate the differences in the effect of spirulina-based microcapsules and commercial diets on the absolute, daily and specific growth and survival rates of milkfish larvae. The larvae were fed with Spirulina platensis as a core diet in microcapsules with different matrix (walls). The first capsule wall was gelatin and fish oil, while the second capsule wall was gelatin, fish oil and whole egg. The control group was fed with the commercial diet. A total of 1200 larvae were used in this experiments using the recirculation systems. The experiment was conducted in 42 days of culture. Larvae were fed three times a day and the feed was increased regularly as the size of the larvae increased. The results showed that the effects of both sprirulina-based microcapsules diets on the absolute growth rate (AG), specific growth rate (SGR) and average daily growth rate (ADGR) of Chanos chanos larvae were the same as on those larvae which were fed with the commercial diet. The survival rates were at 80.6±11.17% for those fed with Spirulina platensis with gelatin and fish oil wall; 84.6±8.44% for those fed with Spirulina platrensis with gelatin, fish oil and whole egg wall, and; 83.8±16.50% for those fed with the commercial diet. This study showed that Spirulina-based microcapsules had the same effect as the commercial feed on the growth of milkfish larvae indicating that this diet could replace the commercial diet.

Sea cucumber was a marine invertebrate from class Holothuroidea and phylum Echinoderm that possessed various bioactive compounds. This study aimed to estimate the antioxidant properties of sea cucumbers and evaluate their antioxidant ability. Ferric Reducing Antioxidant Power (FRAP) and Cupric Reducing Antioxidant Capacity (CUPRAC) assay estimated the antioxidant properties of sea cucumbers, and for control, ascorbic acid and Trolox were used. The samples were dried sea cucumber of Holothuria edulis, Pearsonothuria graeffei, and Stichopus herrmannii from Boalemo, Gorontalo. The three samples had various antioxidant capacities. H. edulis had the highest value, both in FRAP and CUPRAC assay, followed by P. graeffei and S. herrmanni. The FRAP values were 48.47; 28.32; and 11.95 μmol Fe(II), respectively and the CUPRAC values were 6.5; 5.9; and 1.49 μmol Trolox/g extract. The weak antioxidant properties of sea cucumber extract in both methods were most likely related to the absence of phenolic compounds which usually have OH groups and conjugated double bonds. Separation and purification of the crude extract may improve its antioxidant properties. Based on this research, it can be concluded that the antioxidant capacity of H. edulis, P. graeffei, and S. herrmanni using the FRAP and CUPRAC method was weak.

No abstract

Abstract. Glass eels of Anguilla bicolor is an expensive and still abundant commodity in Laguna Segara Anakan, Central Java, Indonesia. However, the growth of glass eels to elver is still a problem because of high mortality in nursery I and II. The objective of the study was to evaluate the result of stocking density on the performance of glass eels in the biofloc system during nursery I. Glass eels were stocked at densities of 54.95, 109.89 and 164.84 fish/m 3 , respectively, with three replicate ponds for each density. Eels were fed a formulated pasta-diet containing 40% crude protein and , 4% crude lipid, 5% crude fiber, 11.5% ash and 12% moisture, respectively. The water quality were maintained at levels of for fish culture througout the experiements: water temperature was 27.1 o C (ranged from 26.3 to 28.2 o C), pH (7.6, ranged from 6.8 to 7.8) and DO (7.2 mg.L -1 , ranged 6.9 to 7.5 mg.L -1 ). The results showed that the stocking density did not significantly affect the final weight, weight gain, AGR, SGR, FCR and survival, however this had a significant effect on the yield. The biofloc system was suitable for raising glass eels.

This study aimed to determine the growth rate and protein content in Nannochloropsis oculata, Chlorella vulgaris, Spirulina platensis were cultured using agricultural fertilizers. The agricultural fertilizers used were Urea, ZA and TSP. Each single cell protein was cultured using the three types of fertilizers with a ratio of Urea: ZA and TSP as follows (A) 1: 2: 1 [(10:20:10 g / L)], (B) 2: 2: 1 [(20:20:10 g / L)] and (C) 3: 2: 1 [(30:20:10 g / L)], respectively. The results showed that the best ratio of Urea, ZA and TSP fertilizers to growth of Spirulina, Nannochloropsis oculata and Chlorella vulgaris was C [30:20:10 (g / L)] treatment. However, phyto-protein content in Nannochlorophsis differed significantly between fertilization treatments, C fertilization yielded the highest protein content (28.75±0.05%), when compared with A (25.13±0.01%) and B (25.14±0.02%), respectively. In Chlorella vulgaris, all fertilization treatments showed very significant differences, B fertilization (28.24%±00.006) yielded the highest phyto-protein content, if compared to A (23.63% ± 0.003) and C (19.74% ±0.006 ), respectively. All fertilization treatments showed very significant differences (P <0.05) on Spirulina platensis. The highest content of phyto-protein (62.68 + 0.05%) was present in treatment C, when compared to A (52.18 + 0.05%) and B (62.37 + 0.01%) treatments, respectively.