Cacing Nereis Sp. merupakan hewan invertebrata anggota Familia Nereidae, Classis Polychaeta yang hidup di ekosistem estuarin, sebagai benthik. Nereis Sp. dapat dimanfaatkan untuk pakan udang karena mengandung asam amino dan asam lemak tak jenuh yang tinggi, untuk menyempurnakan mutu sel gamet pada induk udang dan meningkatkan mutu larva. Cacing ini banyak terdapat di daerah pertambakan Cilacap tetapi masih belum banyak informasi tentang aspek biologi cacing Nereis Sp. yang di hidup di wilayah ini, sehingga perlu dilakukan studi tentang aspek biologi cacing Nereis Sp. di wilayah ini untuk informasi usaha pengembangan budidaya cacing lur. peneiltian ini dilakukan dengan metode survei. Pengambilan sampel di daerah pertambakan desa Jeruklegi kabupaten Cilacap dalam empat stasiun dengan tiga titik pengambilan sampel dan di ulang tiga kali setiap dua minggu sekali. Hasil penelitian menunjukkan bahwa kondisi aspek biologi cacing Nereis sp. dari empat stasiun pengambilan, yaitu jumlah segmen; berat tubuh dan rasio kelamin tidak berbeda nyata (p>0,05). Kondisi Lingkungan masih mendukung kehidupan Nereis sp. untuk tumbuh dan berkembang biak.
The worm Dendronereis pinnaticirris is used as feed of shrimp broodstock in a hatchery, mainly because of its availability in the local market, and its nutritional content required for improving gonad maturation and post larvae production. The important economic value of the worm and the increasing demand for feed in shrimp hatcheries have led to an intense exploitation that suppers its population and the sustainability of the whole estuarine ecosystem. The study, which represents the starting point of large-scale production of the polychaete worm by culture in the artificial system, shall be undertaken. Accordingly, a production study using D. pinnaticirris juvenile was carried out under controlled conditions fed with two different feed (feed contains mainly plant protein and animal protein, respectively), and kept in three different substrates (substrate consists of mud and 8.78%, 37.34%, 39.17% sand, respectively). The treatments were arranged according to randomized completely block design in 8 (eight) replicates. The survival rate, body weight increment and growth, oxygen consumption, proximate body chemical, and fatty acid contents were measured. The results showed that growth and oxygen consumption was significantly influenced by a substrate and feed type (P<0.05). Worms on the mud substrate with 39.17% sand, and feed containing vegetable protein showed the highest oxygen consumption. Survival rate and chemical body content were not significantly influenced by the type of substrate and feed (P<0.05). The protein content of the worm was 32.02-43.81%, while fat content was 2.41-9.89%. Twenty different fatty acids were identified in the worm of all treatment groups.
Nereis sp. is an invertebrate member of Familia Nereidae, Classis Polychaeta that lives in the estuarin ecosystem as benthic. Nereis sp. is one of the natural foods that can trigger the maturation of shrimp gamete cells up to 70% because they contain high levels of amino acids and unsaturated fatty acids, but the fulfillment of Nereis sp. still rely from nature. That condition encourages the cultivation of Nereis sp., but there is not much information about it. This study aims to determine the metabolic rate and nutritional content of Nereis sp. with different maintenance salinity and feed. This reasearch used immature Nereis sp with two different type of feed, i.e. with vegetable protein and animal protein. They were maintained in three different salinity i.e. 5, 15, and 25 ppt. The results showed that oxygen consumption rate of Nereis sp was affected by salinity of the medium, but was not influenced by the type of feed given. The highest oxygen consumption was observed in Nereis sp. that maintained at 25 ppt. The body protein content is influenced by the salinity and the type of feed given, while the fat content is not affected by the salinity and the feed. The highest protein, fat and carbohydrate content of the body was detected in salinity of 15 ppt and fed with vegetable protein foods.
This study was designated to reveal reproduction aspects of D. neapolitana that can support the domestication and cultivation of D. neapolitana. This research method is a survey method, and sampling was carried out three times at four points in the mangrove area of Jeruklegi Cilacap. The samples that have been taken are taken to the Animal Physiology Laboratory and stored in a bucket of 15 ppm brackish water and then aerated. The variables measured were the number of worm segments, worm body weight, the sex ratio of the worms, the development of male and female gametes and environmental factors. To see the relationship between parameters, correlation analysis, regression and t-test were used to determine the difference in the number of segments and body weight of male and female worms. The sex ratio value obtained was 1: 1. The body size of the female and male D. neapolitana worms was not significantly different. Observations on female worms showed the number of segments means 131.96 ± 28.19 pieces; body weight means 2.65 ± 1.15 g and egg diameter mean 219.656 ± 9.75 µm. Male worms had several segments represent 136.97 ± 24.51; body weight means 2.18 ± 1.11 g and the form of sperm was tetrad spermatid. While indetermined worms had several segments mean 115 ± 39.38 and body weight mean 2 ± 0.73 g. The results of the analysis of the relationship between body weight and maturation level of D. neapolitana obtained the value of r = 0.009, linear regression equation y = 219868 -0.080x; and the value of t count (-0.043)
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.