Variasi komposisi daun Ketapang dan kulit pisang sebagai media tumbuh pakan alami jentik nyamuk

This study aimed to 1) determine the best combination between ketapang and banana peels for the propagation of life feed mosquito larvae; 2) determine the culture media that can produce mosquito larvae optimally. The containers used in this study were 24 buckets with a size of 5 litres. Some of the materials used in the study were dried ketapang leaves, goroho banana peels, kepok banana peels and water. This study used a factorial Completely Randomized Design (CRD) consisting of two factors and three replications. The first factor was the difference in the number of ketapang leaves. The second factor was the difference in banana peels types. The first factor included the difference in the number of ketapang leaves, consisting of: Treatment 0 = without ketapang leaves, Treatment 1 = 50 grams of ketapang leaves, Treatment 2 = 75 grams of ketapang leaves, Treatment 3 = 100 grams of ketapang leaves. The second factor included differences in banana peels, which consist of: Treatment 1 = one kepok banana peel, Treatment 2 = one goroho banana peel. The results were different types of banana peels affected the numbers of mosquito larvae, where the best was kepok banana peels; the difference in weight of ketapang leaves did not have a significant effect on the number of mosquito larvae. The container used in this study was a bucket with a volume of 5 L. The banana peels used were goroho banana peels and ripe yellow kapok banana peels. Ketapang leaves were preapared with a weight 0f 0, 50, 75, and 100 grams, respectively. Shoe banana peels and goroho banana, one skin eachand ketapang leaves 0, 50, 75, and 100 grams, respectively, put together wit the jalah used to wrap between ketapang leavesand spatu banana peels and goroho banana, then put into a container that has been filled wit 3 L of water.

Tingkat kepadatan populasi Alona sp. pada media tumbuh ragi

The purpose of this research was to investigate the population density of Alona sp. on yeast media with different concentrations. The study was conducted using a completely randomized design (CRD) consisting of 5 treatments and 3 replications for 21 days. The treatments given were A: 10 ppm yeast, B: 5 ppm yeast, C: 1 ppm yeast, D: horse manure, and E: well water. The initial stocking density of Alona sp. for each treatment was 15 individuals/300 mL of well water. The water quality parameter measured during the study was temperature. The results of the one-way ANOVA test showed that there were significant differences between treatments on the density level of Alona sp. (p <0.05). Tukey's further test showed that treatment B was the best with a density of Alona sp. as many as 8059 individuals/300 mL of well water. The temperature during the study, in the morning was 26 ± 0.52°C and in the afternoon was 26 ± 0.46°C.

Studi kesesuaian kualitas perairan tambak ikan bandeng (Chanos chanos) di Kawasan Ekowisata Mangrove Sungai Tatah

The research objective was to determine the quality of the milkfish pond waters (Chanos chanos) in the Tatah River Mangrove Ecotourism Area. This research was conducted from March to May 2020. Purposive sampling was one of the research methods used to collect data. Water samples were taken once a week (in the morning, afternoon and evening) from six sampling stations. The parameters observed included the physical and chemical properties of the waters. The data analysis used was scoring. The results of the research on the level of quality suitability of pond waters in the Tatah River Mangrove Ecotourism Area indicated that station 2, and 4 were very suitable level of conformity (S1) meaning that it is potential station while station 1, 3, 5 and 6 were quite appropriate (S2) which means that the areas meet the minimum requirements for use in milkfish (C. chanos) cultivation

Toksisitas Merkuri (Hg) pada struktur jaringan ikan

The problem of pollution that occurs in the aquatic environment is getting out of control and causes the degradation of fishery resources which are important for humans. One of the pollutants from industrial activities is heavy metal. There are various kinds of heavy metals, mercury (Hg) is the most dangerous heavy metal. Mercury (Hg) enters directly into the waters through rainwater and leaching the soil and river flows which are then absorbed and metabolized by microorganisms. Mercury (Hg) is difficult to degrade from the body, because mercury (Hg) is actively involved in the food chain. Microorganisms feed molluscs, crustaceans and fish which are a source of protein for humans. Mercury (Hg) toxicity in fish can result in a stress response in fish which results in impaired growth, immune system, and changes in tissue structure. This brief review aimed to enrich the scientific repertoire of the toxicity of mercury (Hg) in fish and its effects on humans. This review was a non-experimental research by conducting research around the literature

Budidaya ikan lele (Clarias gariepinus) sistim bioflok skala rumah tangga

This community service activity aimed to apply the bioflock culture techniques and good business management to fish farmer group. As much as 2000 individuals catfish ranging from 5-7 cm in length was used in this activity. The fish obtained from Fresh Water Aquaculture Board, Tatelu were pun in oxygenated plastic bags and transported to fish farmer group in West Kombos, District of Singkil. The culture activity that applied the bioflock culture techniques took place for about six months. The specific target to be achieved at the end of the training were all members of the partner group could make the fish feed formulations with local raw materials by themselves. In addition, they have skilled on management, marketing and could have simple bookkeeping note as well. In overcoming these problems, an approach was carried out through direct field counseling and training. Then, partners had the opportunity to practice it until they can do it by themselves. The first step of this activities was preparation, the second was three days of training (4 hours /day), and the last were monitoring, evaluation, and assistance up to the end of this program

Kontaminasi logam nikel (Ni) pada struktur jaringan ikan

The development and progress in the mining industry has created an opportunity for the concentration of heavy metals to increase uncontrolled in waters and lead to degradation of fishery resources. Heavy metals are one of the pollutants from industrial activities that enter directly into the waters through rainwater and soil washing and river flows which are then absorbed and metabolized by microorganisms. Heavy metals are difficult to degrade and are actively involved in the food chain. Microorganisms feed molluscs, crustaceans and fish which are a source of protein for humans. Nickel metal (Ni) is a metal that can cause a stress response in fish which results in impaired growth, immune system, and changes in tissue structure. This brief review aims to enrich the scientific repertoire of nickel (Ni) metal contamination in fish and its impact on humans. This review is a non-experimental research by conducting research around the literature

Pengelolaan sampah dan pembuatan pupuk organik di Lingkungan II Kelurahan Pinaesaan Kecamatan Wenang Kota Manado Provinsi Sulawesi Utara

The purpose of waste management and composting activity in Lingkungan II, Pinaesaan Sub-District, Wenang District, Manado City was to develop transformation that increases level of knowledge, skill, ability, attitude and motivation according to planned activities, whereas the method used is in the form of counselling. On this activity, the result was obtained where the group of housewives gave positive responses and learned how to make compost from household waste

Uji efektivitas ekstrak daun Andong (Cordyline fruticosa) sebagai bahan antimikroba alami

The purposed of research was to evaluate the ability of Andong leaf extract as natural antimicrobial against pathogenic bacteria, Aeromonas hydrophila. The plant was collected from yards at Kasuang Village, Tondano Disctrict of Minahasa Regency. After washing, the leaf was cut into small pieces, eased using a mortar and then extracted by maceration using alcohol 75% for 24 hours with ratio between simplicia and solvent was 1:1, 1:2, 1:4 and 1:8. Antimicrobial activity of the extract was examined through disc diffusion method. The results showed that leaf extract of andong was able to inhibit the growth of bacteria with strong and the sensitivity of the extract was categorized as strong.

Pertumbuhan Ikan Nila (Oreochromis niloticus) yang diberikan pakan kombinasi pelet dan maggot (Hermetia illucens) kering dengan presentasi berbeda

This study aimed to determine the effect of providing a combination of natural feed maggots and pellets on the growth performance of Nile Tilapia and to ratio between maggots and pellets that promote growth of Nile Tilapia. The research was conducted from June to August 2020. The research method was using a completely randomized design (CRD) with 5 treatments and 3 replications with the following treatments: treatment A = 100% pellets, treatment B = 75% pellets and 25% maggots, treatment C = 50% pellets and 50% maggot, treatment D = 25% pellets and 75% maggot, treatment E = 100% maggot. The test fish used Nile Tilapia fingerling with average weighing 4 g / fish with density of 5 fish / container and maintained for 21 days. The containers used in this study were 15 plastic trays with a diameter of 40 cm and a height of 20 cm each with a water capacity of 15 liters. Growth performance data were Weight gain (WG), Specific growth rate (SGR), relative growth rate (SGR), feed convertion rate (FCR) and feed intake (FI). Based on the results of this study, it shows that the use of a combination of pellet and maggot feed as Nile tilapia juvenile has an effect on the growth performance of Nile tilapia so that maggot can be used as an alternative feed that has high nutritional content for tilapia fish cultivation. The treatment that gave the best growth effect on tilapia seeds was found at the dose of a combination of 50% pellet feed + 50% maggot, with Weight gain (5.5±1.1g), SGR (3.7±0.5%), RGR (139.4±53.4) and FCR (1.2±0.2)

Pertumbuhan populasi pakan alami alona sp. pada media kultur dengan konsentrasi ragi berbeda

The goal of this research was to observe the effects of yeast on the density rate of Alona sp. with various concentrations compared to the density rate in horse manure media. The treatments are as follows, treatment A yeast 30 mg yeast/0.5 L water, treatment B yeast 10 mg yeast/0.5 L water, treatment C yeast 5 mg yeast/0.5 L water, treatment D yeast 1 mg yeast/0.5 L water, treatment E 0.5 L well water, treatment F horse manure media (horse manure 10 gr, soil 50 g in 0.5 L water). The research was carried out for two weeks, and the density calculation was done once a week. The results obtained based on Anova One Way analysis are that yeast with different concentrations does not have a significant effect on the density of Alona sp. Nevertheless, it was concluded that the giving of yeast to Alona sp. is much more efficient and effective compared to horse manure media, because it is more hygienic, easy to obtain and not expensive, also from nutritional value, yeast has a higher value compared to horse manure media. The measuring of water quality parameter during the research was temperature around 26-30°C.