Sexual Maturity and Macronutrient Contents in Diopatra sp. (Onuphidae, Polychaeta) Maintained at Different Salinity Levels

E. Wibowo, Mellya Rizki Pitriani, F. Rachmawati, U. Susilo, E. Setiyono, Phuping Sucharitakul, J. Pamungkas
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Abstract

Diopatra sp. (Onuphidae, Polychaeta) is an economically important polychaete species commonly used as a fishing bait by local anglers in Cilacap, Central Java Province. Some biological aspects of this local species, however, have not been studied yet. The aim of this research was to see the effect of salinity levels on the sexual maturity and the macronutrient contents of the animals. Diopatra specimens in the present study were collected from the intertidal mangrove habitats of Jeruklegi Village, Cilacap, in sexually immature condition. The worms were then transported to the laboratory and were maintained in containers with four different salinity levels, i.e. 10, 15, 20 and 25 ppt over the next two months. The sexual maturity of the animals were observed based on the presence or absence of coelomic gametes. Proximate analysis was performed to determine macronutrient contents of the animals. The effect of salinity levels on the animals' sexual maturity and macronutrient contents was analyzed using one-way ANOVA. The results showed that salinity levels did not significantly affect the sexual maturity level of Diopatra worms (p > 0.05). Similarly, they did not affect the protein and fat contents, but impacted the carbohydrate content of the animals (p < 0.05). The protein and the fat contents in Diopatra sp., i.e. 41–43% and 6–9%, respectively, met the amount required to be used as shrimp broodstock and fish feeds. While the species has the potential for use in local aquaculture, the annual reproductive cycle as well as the identity of the species, however, require further research.
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不同盐度下双翅目(Onuphidae, polycheta)性成熟及大量营养素含量的维持
Diopatra sp. (Onuphidae, Polychaeta)是中爪哇省Cilacap当地渔民常用的一种具有重要经济价值的多毛纲鱼类。然而,这种本地物种的一些生物学方面尚未得到研究。本研究的目的是观察盐度水平对动物性成熟和常量营养素含量的影响。本研究的双翅蝶标本采集于中国奇拉卡普Jeruklegi村潮间带红树林生境,性成熟状态。然后,这些蠕虫被运送到实验室,在接下来的两个月里,它们被保存在四种不同盐度水平的容器中,即10、15、20和25 ppt。根据体腔配子的存在与否来观察动物的性成熟。采用近似分析法测定动物的常量营养素含量。采用单因素方差分析分析盐度水平对动物性成熟和常量营养素含量的影响。结果表明,盐度对双翅虫性成熟水平无显著影响(p > 0.05)。同样,它们不影响动物的蛋白质和脂肪含量,但影响动物的碳水化合物含量(p < 0.05)。黄颡鱼的蛋白质和脂肪含量分别为41-43%和6-9%,满足虾类和鱼类饲料的需水量。虽然该物种有潜力用于当地水产养殖,但每年的繁殖周期以及该物种的特性需要进一步研究。
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