The Economic Valuation of Marjoly Beach and Resort Tour with Travel Cost Method (Travel Cost Method) Bintan District, Riau Islands Province

This research was conducted at Marjoly Beach and Resort, Bintan Regency, Riau Islands Province. This study aims to describe the accommodation and entertainment as well as the socio-economic characteristics of visitors to Marjoly Beach and Resort, to analyze the factors that influence tourist visits to Marjoly Beach and Resort, to analyze the amount of economic value obtained by Marjoly Beach and Resort by accidental sampling with a total of 30 respondents. . The data needed in this research include primary and secondary data. Data were analyzed using descriptive analysis and multiple linear regression and from consumer surplus using the travel cost method. Respondents are determined using the travel cost method approach by estimating the economic value seen from the consumer surplus. The results showed that the total travel costs incurred by all visitors as respondents were around Rp. 38,035,000. Factors that influence tourist visits to Marjoly Beach and Resort are travel costs, income and age. The consumer surplus value obtained from the travel cost method is Rp. 50,276,669.60/ person per year or Rp. 17,955,953.4/ person per visit, then the total economic value obtained from assuming a surplus of tourism consumers in Marjoly Beach and Resort is Rp. 2,295,129,967.25.

APPLICATION OF DEPOSITION BACK IN THE AQUAPONIC SYSTEM IN REDUCING NH3 IN CULTIVATION Tilapia (Oreochromis niloticus)

The success of a culture depends on the quantity and quality of water used in fish culture without water exchange, the concentration of aquaculture waste such as ammonia (NH3) will increase very rapidly and is toxic to the cultivated organism. One of the innovations applied in fish farming is integrating plants through an aquaponics system. This study aims to determine the effect of using a settling tub in reducing ammonia waste (NH3) and growth in tilapia aquaculture using an aquaponic tidal system. The size of the initial tilapia seeds used is 3-4 cm. There are two treatments used, without settling tub (A) and addition of settling tub (B) with three replications. However, the results showed no significant differences (P>0.05) between treatments for all parameters observed. It is necessary to carry out further research on different fish and plants to see the optimization in reducing ammonia waste (NH3).

Capture Fishery Production in Bintan Regency

The waters of Bintan Island are included in the deep sea waters of the South China Sea, within the Indonesian Exclusive Economic Zone, the potential for fish resources in the territorial waters and the South China Sea reaches 378.2 tons, with the allowable catch of 302.5 thousand tons. From this potential, the potential for fish resources that enter the territorial waters of Bintan Regency is 106,018 tons with a allowable catch of 50,287 tons. The purpose of the preparation of this scientific article is to provide information about capture fisheries production in Bintan Regency. The preparation of this scientific article was carried out in April 2021 in Bintan Regency using a descriptive analysis based on a literature review using secondary data as a source of information. The volume of fishery production originating from fishing efforts in Bintan Regency was recorded at 53,338.45 tons in 2017, while in 2018 and 2019 it was 54,682.27 tons and 55,604.40 tons, respectively. The amount of capture fisheries production in Bintan Regency has increased over the last 3 years (2017 - 2019).

Karakteristik Ikan Hasil Tangkapan Jaring Insang Hanyut Di Perairan Kelurahan Tanjung Solok Kecamatan Kuala Jambi Kabupaten Tanjung Jabung Timur

Tanjung Solok sub-district is one of the areas in Kuala Jambi which is the landing location for fish. One of the most widely used fishing gear to catch fish is drift gillnets. This study aims to observe the characteristics of fish catches with drift gill nets landed in the Tanjung Solok sub-district. The analysis was carried out descriptively with survey data collection methods and random sampling. The gill mesh used is 4 inches in size. Data collection was carried out on 12 ships with 10 repetitions. The catches that were obtained were threadfin, white pomfret, black pomfret, mackerel, conger eel, flatfish, and dorab wolf-herring with the most catch was 1,143 black pomfret and the smallest catch was 75 conger eel. The diversity index of 1.66 is included in the medium category, while the dominance index is 0.24 in the low category. The length of each fish varies. Based on the research it can be concluded that the characteristics of catches by fish size shows that measure decent overall catch more than 30% and 70% are still in decent size has not been caught

Fishing gear selectivity of wire trap to limbat fish (Clarias nieuhofii) in swamp water Rimbo Ulu, Tebo Regency, Jambi Province

This study aims to analyze the level of selectivity of wire trap fishing gear against limbat fish (Clarias nieuhofii) in the swamp waters of Tebo Regency, Jambi Province. Data collection was carried out by catching trials using 3 units of wire traps with 30 replications, in June-August 2020. The research data were analyzed descriptively using the logistical selectivity model of the maximum likelihood method equation in the solver program from microsoft excel. The results showed that the wire traps were not selective for size but were selective for the limbat fish species (C.nieuhofii). The selectivity curve based on the logistical function shows that the probability of being caught by fish are at 22-48 mm body height, while the size of the fish that can escape has a maximum height of 34 mm or a length of 182 mm.

Diversity of Fishing Equipment for Fishermen in Gunung Kijang District, Bintan Regency

The increase in fishery production in Gunung Kijang District cannot be separated from fishing activities. The use of fishing gear that has the potential to damage the environment is assumed to be caused by public ignorance about the dangers of these tools. However, information about the diversity of types of fishing gear used by fishermen in Gunung Kijang District is still scarce. The purpose of the preparation of this scientific article is to provide information about the types of fishing gear used by the community in Gunung Kijang District, Bintan Regency. The preparation of this scientific article was carried out in April 2021 in Gunung Kijang District using a descriptive analysis based on a literature review using secondary data as a source of information. The fishing gear used by Gunung Kijang fishermen include mackerel nets, tuna, stingrays, corals, crabs, floating nets, motor boat charts, fish traps, crab traps, oval crab traps, fishing rods, longline fishing rods, spears, fish guns.

Non-Specific Immune Response and Growth Performance of Clarias gariepinus (Burchell, 1822) Feeded with Moringa oleifera Leaf Flour Suplementation (Lamk, 1785)

Sangkuriang catfish (Clarias gariepinus) is a cultivated species favored by Indonesian and has great potential for development. However, the obstacle to the success of catfish cultivation is a disease. One alternative to overcome this problem is by giving immunostimulants from natural ingredients. The purpose of this study was to test the effectiveness of feeding with moringa leaf powder on non-specific immunity and growth performance of sangkuriang catfish. The study used a completely randomized design (CRD) with 4 treatments (100% commercial feed, commercial feed with 1.5% Moringa leaf supplementation, commercial feed with 3% Moringa leaf supplementation, and commercial feed with Moringa leaf supplementation 4.5%, and 3 replications. The results showed that the commercial feed with 4.5% moringa leaf supplementation gave the best results for total erythrocytes of 5.97x104 cells/mm3 and MCV of 92.10 fl, and increased the absolute weight growth of 46.42 g. However, it did not show a significant effect on total erythrocytes, hemoglobin, hematocrit, MCHC, MCH, MCV, total leukocytes, leukocyte differentials, phagocytic activity, phagocytosis index, absolute weight growth survival rate, and the value of the feed convention ratio (FCR).

Study of Feeding with Local Raw Materials with Different Protein for Growth Sultana Tilapia (Oreochromis niloticus)

Tilapia (Oreochromis niloticus) strain of Sultana (superior selection of salabintana) is a new variety developed by the Center for Freshwater Resources Development (BBPABT) Sukabumi, West Java. Sultana tilapia is the result of crossing 10 superior varieties such as gift tilapia, jica, white, and other superior tilapia. Many factors cause the high price of feed, one of which is dependent on imported raw materials for feed manufacture. This study aims to assess the effectiveness of the use of local raw materials with different protein content in feed for the growth of tilapia and reduce production costs by using local raw materials as feed ingredients. This research was conducted from March 21 to June 19, 2020 at the Integrated Field Laboratory of the Faculty of Agriculture, University of Lampung. The design used in this study was a completely randomized design (CRD) consisting of four treatments with three replications. The treatments given included 30% protein treatment (A), 33% protein treatment (B), 36% treatment (C), and commercial feed control (D) for 60 days of maintenance. The data obtained were analyzed by using the ANOVA test and followed by the Duncan test. The results obtained in this study are that treatment B has the best FCR value and is significantly different compared to other treatments so as to produce the best growth. Besides that, treatment A and C also had a significantly different FCR value compared to the control

Fishery Product Consumption Rate in Bintan Pesisir District, Bintan Regency

Bintan Regency currently consists of 272 large and small islands. The Bintan Pesisir District was formed based on the Bintan Regency Regional Regulation Number 12 of 2007. The preparation of this scientific article was carried out in April 2021 in the Bintan Pesisir District, especially the Kelong, Numbing, Mapur and Air Glubi villages using descriptive analysis based on a literature review using secondary data as a source of information. The consumption rate of fishery products in the Bintan Pesisir District has increased every year. In 2017 the volume of fishery production in the coastal Bintan District produced 7,587.27 tons, in 2018 it was 7,753.88 tons and while in 2019 the Bintan Pesisir District produced 7,884.60 tons

The Effect of Different Size Recirculation Systems on the Quality of Water in Tilapia (Oreochromis niloticus) Culture

This study aims to analyze the effect of different cross-sectional areas of recirculation systems on water quality in tilapia (Oreochromis niloticus) rearing. The method used is an experimental method with a completely randomized design (CRD), 4 treatments and 3 replications each. The treatments are P0 (conventional), P1 (2 cross-sectional units with an area of 1,087 cm2), P2 (4 section units with an area of 2,174 cm2), P3 (6 section units with an area of 3,261 cm2). Each treatment used the same filter, namely cotton, zeolite, pumice stone, and bio balls. The results of the research the highest absolute weight growth was obtained in the P3 treatment with an average value of 4.56 g and followed respectively P2 4.38 g, P2 3.03, P0 2.59 g. The highest absolute length growth rate was obtained in treatment P3 2.71 cm, P2 of 2.54 cm, P1 of 1.87 cm, and the lowest absolute length was found in treatment P0 of 1.62 cm. The highest feed conversion value was at P0 at 3.91, followed by P1 at 2.84, P2 at 2.06, and the lowest at P3 at 1.94. The highest survival value was P3 of 85.00, P2 r 83.33, P1 73.33 and the lowest was P0 of 55.00. The highest diversity coefficient value was obtained in treatment P0 of 17.58, followed respectively by treatment P1 of 16.05, P2 of 12.91 and the lowest coefficient of diversity found in treatment P3 of 12.69. The conclusion of this study is the use of different recirculation cross-sectional areas has a significant effect on absolute weight growth, absolute length growth, feed conversion ratio, survival, and water quality. The recirculation cross-sectional area in P3 treatment with a cross-sectional area of 3.261 cm2 gave good results for the survival of tilapia (O. niloticus).