Jurnal Perikanan dan Kelautan
ISSN / EISSN : 0853-7607 / 2721-8902
Published by: FKIP Universitas Riau (10.31258)
Total articles ≅ 82
Latest articles in this journal
Jurnal Perikanan Dan Kelautan, Volume 27, pp 201-208; https://doi.org/10.31258/jpk.27.2.201-208
Bagan Perahu (Lift Net) is a fishing business that requires a large investment value. The income of this business is uncertain because it relies heavily on catches and the fish season. The risk of uncertainty will affect business income and fishermen's income. This study aims to analyze the economic feasibility of fisheries and fishermen's businesses in Pelita Jaya Bay West Seram Regency, Maluku. The method used in this study is a survey. The results showed that the business carried out is still very profitable, seen from the business income earned by the owner, which is Rp68,548,000/year. Financial analysis shows the value of NPV over the next ten years amounting to Rp241,568,753; the value of IRR is still above the current bank interest rate of 42.98% and the net value of B/C>1, which is 2.58. The average monthly fishermen's income amounted to Rp1,288,311, and the existing income is still far below the UMR of Maluku Province. This is certainly not economically viable
Jurnal Perikanan Dan Kelautan, Volume 27, pp 209-218; https://doi.org/10.31258/jpk.27.2.209-218
Gouramy (Osphronemus gouramy) is a freshwater fishery commodity with a large enough demand and a fairly expensive price compared to other freshwater fish. The purpose of this study was to determine the effect of temperature on larval quality and growth of gouramy fry. The research method used is an experimental method using a Completely Randomized Design (CRD) consisting of two treatments of water media temperature, namely 1) Treatment A = The temperature of the media follows room temperature (control treatment), and 2) Treatment B = The temperature of the medium was set constant at a temperature of 30ᵒC. Each treatment was repeated six times to obtain 12 experimental units. Research parameter data were analyzed statistically using variance (ANOVA) at a 95% confidence level using the t-test. The results showed that the degree of hatching of gouramy eggs, larval size, absolute growth, relative growth, daily specific growth rate and survival rate of gouramy larvae at room temperature and 30°C were 90.38% and 98, respectively. 76%; 0.54 cm and 0.66 cm; 0.86 cm and 0.87 cm; 157.52% and 133.26%; 3.99% and 3.58%; and 74.78% and 91.22%. The study concluded that eggs incubated at room temperature (25-28°C) and 30°C gave significantly different effects on hatching rates and post-hatching larvae size. Larval rearing at room temperature and 30°C gave no significant effect on absolute growth but significantly different on relative growth, daily specific growth rate and survival rate
Jurnal Perikanan Dan Kelautan, Volume 27, pp 158-163; https://doi.org/10.31258/jpk.27.2.158-163
Anadara granosa is one of the bivalves that are often found in public markets. This study aimed to study the relationship between length-weight and sex ratio of blood clams (A. granosa) in the coastal waters of West Rangsang. Sampling was carried out every month at three stations. Shells were collected from a 1 x 1 m2 plot on a quadratic transect. The relationship between length and weight was analyzed by regression analysis. The sex ratio between the number of female and male blood clams in each month of sampling was calculated and followed by the Chi square test to test the similarity. The results showed that the relationship between length and weight of A. granosa was positive allometric. The sex ratio of female and male blood clams in the waters of West Rangsang is not balanced. The number of male blood clams is more than the female.
Jurnal Perikanan Dan Kelautan, Volume 27, pp 192-200; https://doi.org/10.31258/jpk.27.2.192-200
Pearl catfish has the main advantage of fast growth. To maximize this growth, one of the things that must be considered is the feed given. The use of factory feed for catfish seeds is common, so it is necessary to use feed raw materials that are around to be used as raw materials for homemade feed. Vegetable waste such as cabbage and tofu dregs can be used as fish feed which is processed into pellets. Cabbage vegetable waste, tofu dregs, bamboo shoots and bran have protein and carbohydrates that can be used for fish growth. This study consisted of 2 stages, namely stage 1 analyzing the comparison between factory feed and homemade feed and stage 2 analyzing the difference in dosage of homemade feed on the growth and efficiency of pearl catfish (C. gariepinus) seed feed. Data were analyzed using 2 independent samples (unpaired) t-test and ANOVA test. The results showed that the provision of factory feed and homemade feed did not have a significant effect on the growth of length, weight, and feed efficiency of catfish fry. Catfish seeds can be fed homemade feed with ingredients from fermented cabbage waste, tofu dregs flour, rebon flour, bran flour, plus vitamins and minerals. The results of the analysis of variance in the treatment of different feed doses (4%, 5%, 6%, 7%, and 10% per fish body weight), had a significant effect on the growth of catfish length and weight, and had no significant effect on feed efficiency. The higher the dose given for the maintenance period of 30 days of catfish fry gave a good effect with the best dose of 10% per fish body weight
Jurnal Perikanan Dan Kelautan, Volume 27, pp 227-234; https://doi.org/10.31258/jpk.27.2.227-234
Research on the condition of seagrass communities in the waters of Ory village is important to do as a basis for management strategies and data on seagrass meadow conditions. The purpose of this study is to find out the current seagrass conditions (2021) and to find out the structure of the seagrass meadow community formed and the biota associated with seagrass in Ory waters. This research was conducted in June-August 2021 in the waters of Ory village of Haruku Island, Central Maluku District. The sampling technique in this study is based on the use of the square transect line method. Seagrass sampling is done at low tide using a square of 0.5 x 0.5 m with the size of each plot of 0.1 x 0.1 m as much as 25 plots. The data analysis method for occurence frequency calculation, type coverage, while to know seagrass conditions. Based on the results of the study, there are 5 types of seagrass in the waters of Ory village, namely Thalassia hemprichii, Enhalus acoroides, Cymodocea rotundata, Halophila ovalis, and Halodule pinifolia. The density value of seagrass in the waters of Ory village is 322 shoots / m2 (very tight), the frequency of Enhalus acoroides species is more widespread than other types, and the covering value of seagrass is 98.45% (good, healthy / rich). The highest INP is in the Enhalus acoroides, and the biota species associated with seagrass are A. granosa, Linckia laevigata, P. nododsus, and Holothuria scabra
Jurnal Perikanan Dan Kelautan, Volume 27, pp 164-173; https://doi.org/10.31258/jpk.27.2.164-173
Processed fishery products produce unwanted materials, namely waste. Waste is generated in the form of heads, tails, fins, bones, and offal. Bone is one form of waste generated from the fish processing industry which has the highest calcium content in the fish body. Snakehead fish bone waste (Channa striata) is one of the potential food ingredients that is widely used in South Sumatra, especially in the city of Palembang as a raw material for processed Palembang specialties. Diversification of processed fishery products needs to be developed. In this study, the authors innovate processed products made from cork fish bones to increase the nutritional value of the community through protein and fish calcium in the form of processed products of cork fish bones chips. This research was conducted from April to June 2021. This study aims to determine the effect of using the addition of cork fish bones in the manufacture of fishbone chips with different compositions and to obtain the best chip products from the use of s cork fish bones. The method used was an experiment using a Completely Randomized Design (CRD), with 4 levels of treatment P0:0% (Without the addition of cork fish bones and 300 g of Wheat Flour) P1:20% (60 g Addition of cork fish bone and 240 g of Wheat Flour). ) P2: 25% (75 g cork fish bone and 225 g Wheat Flour), P3: 35% (105 g cork fish bone and 195 g Wheat Flour). The parameters measured in this study were organoleptic tests (appearance, aroma, taste, and texture) and proximate tests (moisture content, protein content, fat content, ash content, and carbohydrate content). The results showed that the best treatment on the P3 chips treatment: 35% (105 g Addition of Cork Fish Bone and 195 g Wheat Flour) including the best organoleptic average values obtained in color (58.0) Aroma (60) Taste (52.5), and Texture (59.5). Chips P3: 35% (Addition of Cork Fish Bone 105g and Wheat Flour 195g) including proximate test, average water content is 3.09%, protein content is 18.68%, fat content is 28.81%, ash content is 6.30 %, and carbohydrate content is 43.12%.
Jurnal Perikanan Dan Kelautan, Volume 27, pp 136-144; https://doi.org/10.31258/jpk.27.2.136-144
The entry of vaname shrimp into Indonesia was to replace tiger prawns (Penaeus monodon) which at that time experienced a decline in quality. Although vaname shrimp is famous for having various advantages, there are still obstacles encountered during the cultivation period, one of which is the attack of vibriosis caused by the bacterium Vibrio harveyi. This study aims to determine the effect of adding white turmeric extract (Curcuma zedoaria) on the immune system of white shrimp (Litopenaeus vannamei) which was challenged with Vibrio harveyi bacteria. This research was conducted for 60 days from March to May 2021 using experimental research methods. The research container used a container container (size 40x30x28 cm) and a stocking density of 20 fish/container with a volume of 20 L. The research design used was a completely randomized design consisting of 5 treatments with 3 replications where P1: artificial feed + Vibrio harveyi infection, P2: artificial feed + 0.1 mL NaCl injection, P3: artificial feed + 0,5% white turmeric extract + V.harveyi infection, P4: Artificial Feed + 1% white turmeric extract + V.harveyi infection, P5: Artificial feed + 2% white turmeric extract + V.harveyi infection. The results showed that administration of white turmeric extract (C.zedoaria) with a dose of 1% gave the best results and had a significant effect on the survival rate of 68.3%, Total Haemocyte Count of 21.63x10⁶ cells/mL, and Differential Haemocyte Count (hyaline cells). by 58.7%, semi-granulocytes by 18.33%, granulocytes by 23%) which play a role in the immune system of white vaname shrimp. In addition, the value of phagocytic activity was 68.8% and was able to suppress the growth of bacteria in the intestine at the lowest at 57.7×108 CFU/mL and suppress the number of vibrios to the lowest number at 26×106 CFU/mL
Jurnal Perikanan Dan Kelautan, Volume 27, pp 256-263; https://doi.org/10.31258/jpk.27.2.256-263
This study aims to determine the characteristics of salted catfish after the addition of green tea and lemongrass. This research method used a randomized block design (RAK) with one treatment factor and was carried out with 3 repetitions. The treatments used were the addition of 1% green tea and 0,15% lemongrass. The results showed that the treatment had no significant effect on the yield value, water content, ash content, lipid content and protein content of the salted catfish produced. The results of sensory analysis showed that the treatment had a significant effect on appearance, while for aroma, taste and texture it had no significant effect. The best product is with the addition of 0,15% lemongrass which produces a yield value of 57,25%, water content 2.21%, ash content 24,42%, lipid content 29,53%, and protein content 42,96%. Sensory analysis scores for appearance were 7,33 (whole, clean, lusterless), aroma 6,54 (neutral, little additional odor), taste 6,62 (good, species specific, little taste addition), and texture 6,93 (dense, no brittle).
Jurnal Perikanan Dan Kelautan, Volume 27, pp 186-191; https://doi.org/10.31258/jpk.27.2.186-191
Good characteristics of surimi can be seen from its ability to form a gel, one of which is the temperature setting. This study aims to determine the effectiveness of the setting temperature on the surimi gel of moonfish (Megalops cyprinoides). The study used a completely randomized design with treatments of five temperature setting with three replications. Parameters observed were gel strength, folding test, whiteness and expressible moisture content. The results showed that setting temperature had a significant effect on gel strength, folding test, whiteness degree and expressible moisture content (p<0.05) at 95% confidence level. The setting temperature treatment of 40oC and without setting had the highest gel strength compared to other treatments with the max load values of 59.79 kg/cm2 and 60.63±1.44 kg/cm2, respectively, with a 5-fold test quality value, namely does not crack after being folded into quarters. The best setting temperature for the gel forming ability of fish surimi for moonfish is 40oC and without setting temperature.
Jurnal Perikanan Dan Kelautan, Volume 27, pp 145-150; https://doi.org/10.31258/jpk.27.2.145-150
In the Koto Panjang Reservoir the microplastic may originated from the degraded plastic waste as well as degraded plastic net from the fish culturing cages. The microplastic may be accidentally ingulfed as fish swallowing their food. To understand the present of microplastic present in the stomach of wild common carps living around the fish net cage, a study was conducted on in December 2020- February 2021. The fish were captured using fish net (3-5 inc mesh size), 3 times, once/ 2 weeks. The fish stomach was removed and the presence of the microplastic was identified. The stomach content of the fish was mixed with 10% KOH (minimum 3 x of stomach content volume) and was incubated for2 weeks to dilute the organic materials. Then the presence of microplastic was observed using a binocular microscope. Types and abundance of the microplastic was noted. Results shown that the types of microplastic present were films, fibers and fragments. The highest type of microplastic found in the stomach of the fish was films (2.3 particles/ fish), followed by fibers (0.6 particles/fish) and fragments (1.1 particles/ fish).