THE EXISTENCE OF MANGROVE IN BELO LAUT VILLAGE, BANGKA BARAT, BANGKA BELITUNG ISLANDS IN PERCEPTION BLOOD CLAM CULTIVATION

Belo Laut Village has 3,337 ha of mangrove potential spread over three hamlet areas, namely Belo Laut, Tanjung Punai, and Sukal. On the muddy beaches around the mangroves, the community has developed extensive cultivation of blood clams (Anadara granusa). The existence of cultivation in mangrove areas also has the potential to affect the existence of mangroves in the area. For this reason, it is necessary to know the perception of shellfish cultivators on mangroves and the reality of the condition of mangroves in Belo Laut Village so as to provide an overview of the potential for mangrove destruction due to Blood Clam cultivation. Data were collected by interviewing shellfish farmers in Sukal and Tanjung Punai Hamlets. The production of blood clam cultivation has become a new source of economy in Belo Laut Village which is carried out by almost all family heads in Sukal and Tanjung Punai Hamlets. The community considers that the mangroves in Belo Laut village had not changed in quantity and there was no indication of their use other than for tourism. The perception and understanding of shellfish farmers not to disturb the mangroves were based on the protection of their main source of income as shrimp and crab fishermen.

STUDY OF ENVIRONMENTAL AND ECONOMIC SUITABILITY OF GOURAMI (Osphronemus gouramy) CULTIVATION AT PINANG SEBATANG VILLAGE, SIMPANG KATIS DISRICT, BANGKA TENGAH REGENCY

Cultivation is an activity that is carried out in connection with the process of multiplaying resources, one of which is in the field of fisheries. This activity, especially freshwater cultivation, has developed in the community, especially in Bangka Belitung Province, but the ponds used suitability the requirements of both physical, chemical and biological parameters of the waters as well as business feasibility. This study to knew suitability of water quality and analyze the cultivation of gourami in Pinang Sebatang Village. This research was carried out in December 2020 in Bangka Tengah district. This study used a survey method in the form of a case study methode in determining water quality. And then carried out a feasibility test of water quality using the STRORET method and the census method to analyzing cultivation business. Water quality and business analysis were carried out in the gourami cultivators’ pond at Pinang Sebatang Village sustainable. The result showed that the water quality in the gourami aquaculture pond at Pinang Sebatang Village was categorized as moderately polluted water quality status in pond 1 with a score of -12 and the status with lightly polluted in pond 2 with a score of -2. The method of data processing analysis of gourami cultivation at Pinang Sebatang Village uses quantitative methods. The result of the study showed that the income per cycle was Rp 120.000.000,00, income per cycle of Rp. 49.368.000,00, profit per cycle of Rp 38.568.000,00 and business efficiency of 1,69. Form the result of the STORET analysis and the business analysis that has been obtained, the cultivation pond at the Pinang Sebatang Village is feasible to be developed for the cultivation of gourami rearing.

STUDY OF ENVIRONMENTAL AND ECONOMIC SUITABILITY OF GOURAMI (Osphronemus gouramy) CULTIVATION AT PINANG SEBATANG VILLAGE, SIMPANG KATIS DISRICT, BANGKA TENGAH REGENCY

Cultivation is an activity that is carried out in connection with the process of multiplaying resources, one of which is in the field of fisheries. This activity, especially freshwater cultivation, has developed in the community, especially in Bangka Belitung Province, but the ponds used suitability the requirements of both physical, chemical and biological parameters of the waters as well as business feasibility. This study to knew suitability of water quality and analyze the cultivation of gourami in Pinang Sebatang Village. This research was carried out in December 2020 in Bangka Tengah district. This study used a survey method in the form of a case study methode in determining water quality. And then carried out a feasibility test of water quality using the STRORET method and the census method to analyzing cultivation business. Water quality and business analysis were carried out in the gourami cultivators’ pond at Pinang Sebatang Village sustainable. The result showed that the water quality in the gourami aquaculture pond at Pinang Sebatang Village was categorized as moderately polluted water quality status in pond 1 with a score of -12 and the status with lightly polluted in pond 2 with a score of -2. The method of data processing analysis of gourami cultivation at Pinang Sebatang Village uses quantitative methods. The result of the study showed that the income per cycle was Rp 120.000.000,00, income per cycle of Rp. 49.368.000,00, profit per cycle of Rp 38.568.000,00 and business efficiency of 1,69. Form the result of the STORET analysis and the business analysis that has been obtained, the cultivation pond at the Pinang Sebatang Village is feasible to be developed for the cultivation of gourami rearing.

THE APPLICATION OF GUAJAVA LEAF EXTRACT (Psidium guajava Linnaeus) AS IMMUNOSTIMULANT OF COMMON CARP (Cyprinus carpio Linnaeus) INFECTED BY MOTILE AEROMONAS SEPTICEMIA

This study aims to analyze the effect of the various concentration of guava leaf extract (Psidium guajava Linnaeus) on the prevention of Motile Aeromonas Septicemia disease in common carp (Cyprinus carpio Linnaeus). In a total of 150 common carp, length 9-11 cm with a density of 10 carps/aquarium. This study used a completely randomized design through 5 treatments, each treatment has 3 replications, namely (K+) consists of without guava Psidium guajava leaf extracts and without bacteria-infection Aeromonas hydrophila, (K-) consists of without guava Psidium guajava leaf extracts with bacteria-infection Aeromonas hydrophila, (A) the application of 125 ppm guava Psidium guajava leaf extracts, (B) the application of 250 ppm guava leaf extracts, (C) the application of 500 ppm guava Psidium guajava leaf extracts for 23 days. The parameters observed total of leukocytes, differensial leukocytes, hematocrit levels, erythrocyte, hemoglobin, phagocytic activity (AF), phagocytic index (IF), relative percent survival (RPS), survival rate (SR) and water quality. Data were analyzed with Anova 95% confidence interval and continued with Duncan test. The parameter also showed a significant result (P<0,05) with the application of guava Psidium guajava leaf extracts to the total leukocytes, differensial leukocytes, erythrocyte, hemoglobin, phagocytic activity, phagocytic index and relative percent survival. The results of this research indicate the concentration of 250 ppm guava Psidium guajava leaf extracts is the optimum application to increase common carp non-spesific immune responses.

THE PERFORMANCE OF MACROZOOBENTOS AS A BIOINDICATOR OF WATER QUALITY IN THE LOWER PARTS OF THE HURUN LAMPUNG RIVER

Macrozoobenthos is one of the organisms that can be used as biological indicators because it tends to live in an area and has sensitivity to environmental changes. The Hurun River had many community activities. Based on this, it was necessary to analyze the diversity of macrozoobenthos which will be compared with the physical and chemical parameters of water in order to find out the indicators that affect the abundance of macrozoobenthos in the river. The purpose of this research was to determine the macrozoobenthic community structure which found in the Hurun River based on diversity, uniformity and dominance indices, to build multiple linear regression models, and to determine the bioindicators of pollution in the Hurun River. The factors that influence the abundance of macrozoobenthos are temperature, depth, brightness, DO, TOM, and salinity. The types of macrozoobenthos obtained were 87 species with the highest abundance of macrozoobenthic animals of 70,666.56 ind/m3 while the lowest abundance of macrozoobenthic animals was 13,000.96 ind/m3. Based on data analysis, the macrozoobenthic diversity index was included in the medium category, the level of macrozoobenthic uniformity was included in the high, medium, and low categories, and the dominance level which was included in the medium and low categories. Multiple regression models with a confidence level of 5% get R2 results of 0.86. The level of pollution that occured in the Hurun River based on bioindicators with the ABC curve shows moderately polluted.

DIVERSITY OF MOLLUSCA BIVALVIA ALONG THE BEACHES SAND OF KARANG MAS, MUARA GADING MAS, MARINGGAI REGENCY, EAST OF LAMPUNG

East Lampung Regency has a coastal area of East Lampung with 316 ha. One of the coastal tourist areas owned by East Lampung Regency is Shells Mas Beach. This beach has a fairly long coastline where there are a lot of bivalves, but the inventory of the types of bivalves on the beach.The purpose of the research is to analyze both the species diversities of bivalves and physical also chemical conditions of the waters. The research methodology used purposive sampling method analysis of species abundance data, diversity index, and index dominance. From the result of the bivalve diversities on the coast, bivalve the most common found are is Matra grandis,it is found out that there is no dominating bivalve amongst them due to below normal dominating rate that is 0,08-0,16 to be considered low level (00,00<C≤0,30); middle with diversity index 2,18–2,70 (2<H’≤3); high with index diversity 0,85–0,94 (E>0,6). The highest abundance value at station 1 is 4787.01 ind/m3 and the lowest species abundance value at station 3 is138.75 ind/m3. From the results of the chemical physics measurements, it shows that it still is in the range of sea water quality standards. The Bivalve diversity relationship shows a positive correlation to the parameters of salinity, grain size, and sediment TSS. Meanwhile, it shows negative correlation for parameters DO, pH and temperature.

MINI WHEEL APPLICATION ON HOUSEHOLD SCALE AQUACULTURE OF GIANT FRESHWATER PRAWNS (Macrobranchium rosenbergii)

Giant freshwater prawns, one of the freshwater aquaculture commodities which has high economic value and has wide market opportunity. Dissolved oxygen on giant freshwater prawn aquaculture is the one of necessary part on a prawn weight gain. Availability of dissolved oxygen can be increased by optimalization on mini wheel and blower use. Mini Wheel is a part of aquaculture technology application, especially on household scale aquaculture of giant freshwater prawn (M. rosenbergii). This assembly used recycle material which can still be used. This mini wheel was modified by 3 treatments, that A (blower without mini wheel pond treatment); B (one-propeller mini wheel pond treatment); C (two-propeller mini wheel pond treatment). This research used quantitative method and every treatment should has three repetitions. Aquaculture a household scale by applying mini wheel designed to find out its effect on water quality and growth of giant freshwater prawn (M. rosenbergii), with parameter ABW (Average Body Weight), ADG (Average Daily Growth), FCR (Feed Convertion Ratio) and SR (Survival Rate). This research showed that there is a significant difference between two-propeller mini wheel pond treatment, one-propeller mini wheel pond treatment and blower without mini wheel pond treatment. The optimum Dissolved Oxygen value on two-propeller mini wheel pond treatment was about 9 mg/L (morning and afternoon testing), Pond temperature on range 280C, and also pH has stability on 7. The best growth was found in two-propeller mini wheel pond treatment with Survival Rate (SR) 93%, Average Body Weight (ABW) 10 g/prawn, Average Daily Growth (ADG) 0.11 g/prawn, and Feed Convertion Ratio (FCR) 1.5.

THE STATUS ANALYSIS OF SUSTAINABILITY OF TOURISM DEVELOPMENT GUCI BATU KAPAL BEACH IN MAJA VILLAGE, KALIANDA, SOUTH LAMPUNG

Tourism is an activity that supported with all the facilities at once the tourist activities which gained benefits parties included tourism or visitors, society and local government. Tourism as one of a development sector and driving force of the wheels of economy could not be released the connection with the sustainable development that had been planned by the government. The sustainable tourism development namely a development that could be supported as ecologically, economy worthy, also fair in ethics and social to society. The purpose of this research was to: (1) analyzing the status of tourist sustainability of Guci Batu Kapal beach from five sustainable dimensions (ecology, economy, technology infrastructure, also law and institutional); (2) Identifying factors that influencing sustainable index of Guci Batu Kapal beach tourism. This research was held on February 2021, in Guci Batu Kapal beach, Maja village, Kalianda, South Lampung. The methods that were used for this research was qualitative methods by descriptive research. Analyzing data that used was analyzing multi-dimensional scaling (MDS) with rapfish approach and leverage analysis. The result of this research showed that tourism of Guci Batu Kapal beach had an index score as 21,58 on a sustainable scale 0-100, which mean include in the bad impact (unsustainable) because of the index score was between in index score of 0-25,00. This analysis of Monte-Carlo showed that the index score of tourism Guci Batu Kapal beach sustainability was not that much different with the Rap-beachtour analysis, the difference obtained only for 0,0001-0,00003. The result was quite stable also the mistake in the input could not be avoided.

LENGTH-WEIGHT RELATIONSHIP AND REPRODUCTION OF SULPHUR GOATFISH Upeneus sulphureus (Cuvier, 1829) AT PPI KALIANDA, SOUTH LAMPUNG

Sulphur goatfish (Upeneus sulphureus) is the dominant caught with a fairly high level of utilization. This research aimed to analyze aspects of growth and reproduction sulphur goatfish caught by rampus nets landed at the fishing port of PPI Kalianda. Growth aspects that were observed included the length-weight, while the reproductive aspects observed is the sex ratio, gonad maturity level, and the size of sulphur goatfish at first maturity. This research was conducted in May-July 202 with the research method used simple random sampling method. The fish samples obtained during the study were 600 individuals, the results showed that Sulphur goatfish had negative allometric growth. The equation for the long-weight relationship of sulphur goatfish is log W = -4,6 + 2,9 log L or W = 2,8x10-5L2,9. The sex ratio of sulphur goatfish in May and July were not 1: 1, while the ideal condition was achieved in June. The gonad maturity level distribution of sulphur goatfish was dominated by TKG III and IV for female, while male sulphur goatfish was dominated by TKG II and III. Size at first maturity of sulphur goatfish females was 169,1 ± 1,03mm.

PEFORMA PERTUMBUHAN IKAN KAKAP PUTIH (Lates calcarifer) PADA FASE PEMBESARAN YANG DIBERI PAKAN DENGAN PENAMBAHAN LISIN BERBEDA

This study aims to determine the best dose of the amino acid lysine in formulated feed for the growth of white snapper (Lates calcarifer) in the enlargement phase. The research design used three treatments and three replications with a completely randomized design method (CRD), namely control feed formulations with the addition of 0% lysine, P1 formulated feed with the addition of 0.2% lysine, and P2 feed formulations with 0.4% lysine. The test fish used was white snapper with an average weight of 90 grams. Fish reared in fiber tub volume of 2 m3 with the stocking 6 animals/m3. The results showed that feeding P2 formulation had a significant effect on growth in absolute weight, absolute length, daily growth rate, FCR, protein retention but had no significant effect on the survival rate and amino acid lysine retention. P2 feed (formulated feed with 0.4% lysine) can be used to support the growth of white snapper.