Jurnal Perikanan dan Kelautan
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LC50-48 hours and pH tolerance to seeds Kurumoi Rainbow Fish (Melanotaenia parva)
Get PDFThe value of pH concentration on water quality influences the resistance or survival of kurumoi rainbow fish (Melanotaenia parva). Rainbow fish in habitat (natural) live in a pH range of 6.8-8.5 and in cultivation activities the pH range is unknown. At a concentration of pH <7 including acid pH and > 7 including a moderate pH 7 neutral pH. The direct effect of pH will affect water balance as a fish medium and will die when the pH changes extreme or changes rapidly. The aim of the study was to determine the Lethal Concentration (LC5048 hours) and Tolerance both at acidic and basic pH. The test fish used were Kurumoi rainbow fish with a total length of 2.1 ± 0.25 cm and a weight of 0.10 ± 0.05 g of ± 450 tails. There are two experiments, namely the toxicity test of LC50-48 acid pH and toxicity test of LC50-48 alkaline pH. For toxicity tests LC50-48 acid pH consisted of 7 treatments and three replications at different pH levels, namely A) pH 6.0 (control); B) pH 3.50; C) pH 3.96; D) pH 4.48; E) pH 5.07; F) pH 5.74; and G) pH 6.50. Whereas the toxicity test of LC50-48 alkaline pH consisted of 7 treatments and three replications, namely A) pH 7.0 (control); B) pH 8.5; C) pH 9.2; D) pH 9.9; E) pH 10.7; F) pH 11.6 and G) pH 12.5. The parameters observed during the study were ecording dead fish at hours to (0; 24; 48; 72 and 96) and toxicity of LC50-48. The results showed that the toxicity of LC50-48 pH to Kurumoi rainbow fish was at acidic pH of 4.70 and tolerance ranged from 5.07 to 6.50 for 96 hours while alkaline pH was 10.7 and tolerance ranged from 8.5 to 9.9 for 96 hours
Catch Rate and Fish Catch of Boat Lift Net on Different Position in Palabuhanratu Bay Water, Sukabumi, Indonesia
Get PDFThe waters of Palabuhanratu Bay known as the main fishery base in Southern Java Indonesia because dynamical of oceanography influenced by the Indian Ocean. The common fishing gear used in these waters is the lift net, utilizing the phototactic properties of the fish. To determine the catch rate of lift net, focus of this study is to assess the catches with two different fishing areas of lift net with the coordinates of 07° 00' 00.6" S and 106° 32' 12.1" E (near from coast); 06° 59' 57.7" S and 106° 31' 39.7" E (far from coast). Catch rate analysis used Shindo's formulation interpretation, with the required data being the catch and effort. Captures near and far are dominated by Hairtail Fish weighing 3,3 - 38,5 kg with average catch weight for each trips ranging from 12,1 - 12,8 kg. The catch rate patterns for each type of fish did not differ significantly, the maximum value is Hairtail Fish on the far lift net and the minimum value is Mysis in the near lift net, and both lift nets have the same catch rate for the Squid and Seed Mackerel species. The main catch rate for the near lift net is 0,09 kg/h and for the 0,19 kg/h far lift net, while the side catch rate for the lift net is 2,21 kg/h and the chart is 2,45 kg/h
Allocative Efficiency of Production Input of Pacific White Shrimp Farming in Grabag District, Purworejo Regency, Central Java
Get PDFThis study aims to determine the factors that affect the productivity of white shrimp farming business, allocative efficiency and profit of white shrimp farming in Grabag District, Purworejo Regency, Province of Central Java. The method used in this study was descriptive analysis. Selection of the study sample was done by purposive sampling that was farmer of white shrimp in Grabag District with total respondent in this study were 51 people. Production variables in this study were shrimp seed, feed, probiotics, lime, labour, farmer age, farmer education and farmer's experience. The analytical method used in this study was linear regression from Cobb-Douglas production function, to determine the factors that influenced the productivity of white shrimp farming business so that it could analyze the allocative efficiency, besides the profit analysis. The result of the analysis showed that: (1) the factors that influenced the productivity of white shrimp farming were feed, probiotics and farmers' experience, (2) the use of feed production and probiotic factor was not allocatively efficient so its use should be increased, (3) Average profit of white shrimp farming business was 996.116.057 IDR with average of pond area of 7.011,76 m2 / farmer so that average of each farmer got profit 142.063,63 IDR/m2/year
DC Converter Experiment on Cu-Zn Seawater Battery for Fishing Lamp Energy Source of Lift Net Fisheries
Get PDFLight fihing activities developed rapidly after the invention of electric lights. The innovation of Light Emitting Diode (LED) as energy saving lamp has a great opportunity to be used in fishing activities. LED lamps require low voltage and current, so that it can be combined with renewable energy sources to encourage more environmentally friendly of fishing capture activity. This study aims to determine the design and construction of an optimal DC converter using Cu-Zn seawater battery as an early stage of LED lamp development with seawater energy source for fixed lift net fishery. The research was conducted at Fishing Technology Laboratory, Department of Fisheries Resources Utilization, FPIK-IPB in August 2017. The treatments were number of windings (30:50, 50:80) and number of toroid (single, double) that was used in DC converter circuit. The energy source used comes from a single seawater battery cell with a zinc anode (Zn) and a copper cathode (Cu) with a size of 40x36 cm, inserted into a 3-inch diameter PVC tube. The voltage was measured by a digital oscilloscope (Iwatsu DS 5102), the current was measured using a multimeter (Sanwa CD 771) and the light intensity was measured using a lux meter. Differences in the number of windings and toroid have a significant effect on the value of inductance. Single Toroid with 80 loops produces the largest inductance value (143.1 mH) compared to other treatments. The use of DC converter with dual toroid and 50:80 winding provides better performance than other treatments with maximum voltage, current and intensity respectively 2.12 V; 121,80 mA and 128 lu
Waste Disposal Rate of Small Fishing Vessel ( < 5GT) in PPN Karangantu
Get PDFThe research was conducted to know waste disposal for small fishing vessel (< 5GT) in PPN Karangantu. Research is done in August until November at PPN Karangantu. The aim for the research is analizing waste disposal rate of small fishing vessel (<5GT) at PPN Karangantu. Methods used in research is the survey method and laboratory analysis. Waste disposal a ship were analysed in the water out of a ship and waters in the area of a ship are docked. The parameter that is a ammonia, magnesium, copper , zinc , phenol , oils and fats. The ammonia in waters higher than the ammonia on a ship waste water. Magnesium, copper, zinc, fatty oil and phenol inversely proportional to the waste water ammonia of value in a ship is higher than in water
Species Inventory of Brittel Stars (Ophiuroidea) at Bilik Beach, Baluran National Park, East Java
Get PDFThe Brittle stars is a member of the Phylum Echinodermata that lives in habitats in the intertidal, subtidal, and deep sea zones. Brittle stars can be found in areas of coral reefs, sand, seagrass, macroalgae (seaweed), and dead coral fragments. One of the many intertidal areas of the brittle stars habitat is in the Bilik Beach, Baluran National Park. Ophiuroidea is important to be studied in the conservation area, Baluran National Park, because it is a natural conservation area that has native ecosystems and is managed with a zonation system and utilized for natural tourism, research, science and education purposes. This study aims to determine the type of brittle stars found on the Baluran National Park. The method used in this research is descriptive method with road sampling technique in the Bilik Beach area. The brittle stars species found and described are 8 species, namely Ophiomastix annulosa, Ophiocoma scolopendrina, O. brevipes, Ophioplocus imbricatus, Ophiolepis cardioplax, O. superba, Ophiarachna parvispina, and Macrophiothrix longipeda
Evaluation of Fermentation on Moringa Leaves (Moringa oleifera) as Raw Material on Feed of Tilapia (Oreochromis niloticus) )
No full textMoringa leaves is a potential ingredient for raw material of tilapia feed, which a high protein content of 25%. However, moringa leaves has a high fibre and antinutritional factors. The aims of this study was to evaluate the fermentation of Moringa leaves (Moringa oleifera) as a raw material feed on tilapia (Oreochromis niloticus). This study was conducted for eight months at Laboratory of Aquaculture, Department of Fisheries, Faculty of Agriculture, University of Sultan Ageng Tirtayasa. The study consisted of 4 treatments of feed with different fermentations, namely: A: reference feed 70% + Moringa leaves meal 30%, B: reference feed 70%+fermented Moringa leaves meal with Rhizopus oligosporus 30%, C: reference feed 70%+fermented Moringa leaves meal with Saccharomyces cereviceae 30%, and feed D: reference feed 70%+fermented Moringa leaves meal with Aspergillus niger 30%. The results showed that feed with Moringa leaves fermentation using A. niger resulted in the best growth on tilapia compared to other treatments. Fermentation with A. niger and R. oligosporus on Moringa leaves produced the best nutrient digestibility value compared to other treatments. Moringa leaves fermented with A. niger, S. cerevisiae and R. oligosporus had no effect on physiological processes on tilapia, as shown by hematological parameter values that were within the normal range. Moringa leaves fermented with Aspergillus niger can be used as a raw material for tilapia feed
Substitution of Lindur Fruits Flour on the preferences level of Catfish Meatballs
Get PDFCatfish (Clarias gariepinus) in addition to containing essential nutrients such as protein also contain essential amino acids. If compared with red meat such as beef and chicken,nutritional content catfish more healthy because of high protein also low in fat and cholesterol. To reduce the price of high import tapioca, lindur flesh can be used as flour for one alternative in tapioca starch ingredients in fishballs. Lindur fruit is one typeof mangrove that is very potential as a new food source because of its high protein and carbohydrate content. The purpose of this research was determine the number of substitution of the best lindur flour to the level of preference catfishballs. This research was conducted in May 2017. Located at the Fishery Product Laboratory Faculty of Fisheries and Marine Science Padjadjaran University and Proximate Test was conducted at the Food Technology Laboratory Faculty of Technique Pasundan University. The method used was experimental, with 20 semi-trained panelists with five treatments substitution of tapioca and lindur flour which are 0%:100%, 12.5%:87.5%, 25%:75%, 37.5%:62.5%, and 50%:50% lindur flour with tapioca. The parameters observed were test for protein content, carbohydrate content, water content, ash content, lipid content, tannin content, elasticity, and preference level. Proximate data were analyzed descriptively based on SNI 01-3819-1995 on fish meatballs quality. Based on the result catfish meatballs research test concluded that the best preference catfish meatballs that is with the addition of lindur flour of 12.5% with the average value based on the criteria of the preferred organoleptic characteristics of the appearance 7.8, aroma 7.8, texture 7.5, taste 7.9 and had an alternative value of 8.00. The average folding test score is 5, very chewy. Result of proximate analysis showed carbohydrate result of 22.70%, protein of 14.56%, lipid content of 9.97%, ash content of 2.71%, water content of 48.93%, tannin of 6.54 pp