Saline tilapia (Oreochromis niloticus, L) is potential to be cultured due to its high content of nutrition. This study aims to determine the optimal dosage of Caulerpa lentillifera meal in feed for growth and survival rate of saline tilapia. This research was conducted on August to September, 2018 at Brackish Water Aquaculture Development Center, Aceh, Indonesia. The study used an experimental method with a completely randomized design (CRD) with 5 treatments of meal dosage and 4 replications, namely; A = 0 g, B = 10 g, C = 20 g, D = 30 g, and E = 40 g Caulerpa lentillifera meal Kg−1 feed. The observed parameters included absolute weight gain, absolute length growth, daily growth rate, feed effeciency and survival rate. The results showed that the addition of Caulerpa lentillifera meal in feed significantly (p <0.05)affected the growth and survival rate of saline tilapia. The optimal dosage of meal was 20 g Caulerpa lentillifera meal Kg−1 feed a(treatment C).
The polyculture system provides great benefits in cultivation, including increasing the productivity of land aquaculture, utilizing leftover feed, and improve water quality. The aim of this study was to analyze the competition index and growth performance of tilapia (Oreochromis niloticus), depik (Rasbora tawarensis), lemeduk/tengadak (Barbonymus schwanenfeldii) and peres/nilem (Osteochilus kappenii) in the polyculture system. This research was conducted at Fish Seed Center (BBI) Lukup Badak, Pegasing District, Central Aceh Regency on May – June 2020. This study used a completely randomized design consisting of 4 treatments and 3 replications, namely treatment A control (tilapia 150 of fish in monoculture system), treatment B (tilapia: 112 fish and lemeduk: 38 fish), treatment C (tilapia: 112 fish, depik: 38 fish), and treatment D (tilapia: 112 fish, peres: 38 fish). The experimental fish were reared in a happa container with a cage system of size 0.5x0.5x1m. The results showed that tilapia reared in the polyculture system had a significant effect (P <0.05) on growth performance compared to monoculture system (treatment A). The competition index shows a negative value between treatments. The research indicated that the best experimental was treatment B (tilapia: 112 fish and lemeduk: 38 fish) and treatment D (tilapia: 112 fish, peres: 38 fish) can increase growth performance and biomass production in polyculture system. In conclusion that the application of the polyculture system of tilapia was able to increase the value of growth performance and there was no competition between experimental fish.
The purpose of this research was to determine the community structure of macrozoobenthos in the last three years (2017, 2018, and 2019) through analysis of diversity index, evenness index, dominance index, and density. The research was conducted On March 2017, April 2018, and March 2019 in the Lamnyong River. This research used purposive random sampling method, which consisted of 3 stations based on the width of the river namely the right, middle, and left edges of the Lamnyong River. The results showed that during the last three years, 2017, 2018, and 2019, the community structure of macrozoobenthos in the Lamnyong River was classified as unstable because of the dominance of several macrozoobenthos species, but the quality of the river waters could still be tolerated by macrozoobenthos. The types of benthos was found in the Lamnyong River in 2017 is 3 families of macrozoobenthos namely Anomidae, Mytilidae, and Mactridae. In 2018, was found 5 species of macrozoobenthos which Tellina palatam, Lopha cristagali, Scylla serrata, Pinna bicolor, and Balanus sp., and in 2019 there was found 1 species of macrozoobenthos, namely Mactra luzonica.
This study aimed to determine the prevalence of white feces disease (WFD) infections in vannamei shrimp (Litopenaeus vannamei) in semi-intensive ponds in Aceh Besar District, Aceh Province. The study was conducted in August 2019 in the subdistrict of Masjid Raya and Lhoong. A total of 10 sampled shrimps were randomly selected from each location. Observation of clinical symptoms of WFD infected shrimps was subjected to the intestines, hepatopancreas and feces. The results showed that the prevalence of WFD infected vannamei shrimp within subdistrict of Masjid Raya and Lhoong was 20–40%.
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