DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
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Optimizing restricted feeding strategies to improve tilapia (Oreochromis niloticus) growth and feed utilization
No full textExcessive feeding not only increases production costs, but also it can pollute the environment due to unconsumed feed residue. One of the strategies that can be used to increase aquaculture efficiency is by implementing restricted feeding techniques. This study aimed to evaluate the impact of different restricted feeding intervals on tilapia growth performance, feed conversion ratio (FCR), survival rate (SR), and feed cost efficiency. This study used a Completely Randomized Design (CRD). The study consisted of three treatments and four replications using one container separated using net partition in a pond with a rearing period of 50 days. Periodic restricted feeding affected the growth of tilapia length and weight, but did not affect Survival Rate (SR) and Feed Conversion Ratio (FCR). The highest rate of growth was shown by P2 (restricted feeding period of 1 day) with a length of 8.79 3.18 cm and a weight of 9.46 3.18 g, and the lowest rate of growth was in treatment P3 (restricted fasting period of 2 days) with a length of 8.2 1.82 cm and a weight of 7.47 2.45 g. Although FCR and SR did not differ significantly across treatments, P2 had the lowest FCR (0.76) and highest SR (83%), with a 23% reduction in feed cost compared to P1. In conclusion, restricted feeding with one fasting day per week improved tilapia growth and feed utilization efficiency, offering a cost-effective and sustainable feeding strategy for aquaculture.Keywords:TilapiaGrowthFeed conversion ratioSurvival rateCompletely randomized desig
Morphometric variation of five dominant parrotfish (Scaridae) harvested from the Northern Waters of Aceh
Full text linkThe waters of Aceh are surrounded by three major water bodies: the Andaman Sea, the Indian Ocean, and the Malacca Strait. Differences in current patterns extend the distribution range and contribute to the species diversity. Fish from the Scaridae family are among the species that thrive in these environments. The family Scaridae (Rafinesque 1810), commonly known as parrotfish, inhabits tropical seas, including the Pacific, Indian, and Atlantic Oceans, and is often found in coral reef areas. Parrotfish play a crucial role in maintaining coral reef health as one of the herbivorous fish species. This study aims to analyze the morphometric variation of five parrotfish species harvested from the Northern waters of Aceh. Traditional morphometrics using 12 measurement characters were applied to 60 fish samples from five species of the Scaridae family (Chlorurus capistratoides, Chlorurus sordidus, Scarus ghobban, Scarus niger, and Scarus rubroviolaceus). The results showed that Scarus rubroviolaceus shares four similar characters with Scarus ghobban: ED, HL, CPL, and PFL; it also shares four characters with Scarus niger: ED, HL, CPL, and SNL. Chlorurus capistratoides shares three similar characteristics with Scarus niger: CPL, ED, and PFL. In addition, the results of the DFA analysis revealed that Scarus ghobban and Scarus niger exhibit the highest degree of similarity in morphometric traits, particularly in HL, SNL, DFBL, ED, and PFL. Furthermore, Scarus rubroviolaceus demonstrates a slight overlap with Chlorurus capistratoides, while Scarus niger shows a minor overlap with Scarus rubroviolaceus. This study provides morphological diversity of parrotfish species in the northern Aceh waters.Keywords:Aceh watersmorphometricsParrotfishMeasurement charactersDF
Presenting identification keys and future study on seagrass Halophila major in Indonesia
Full text linkHalophila major is a new species with a wide distribution across various regions in Indonesia. The species was identified in 2020 through a combination of morphology and molecular approaches. Several studies have shown that it has a similar morphology to H. ovalis, which causes significant confusion during identification. Therefore, this study aims to describe the key identification and habitat of H. major and summarize seagrasses study opportunities based on the trend of published articles. A bibliometric analysis was used to summarize the habitat, morphometrics, molecular confirmation, and trend of seagrass topics in Indonesia. Based on the scientific articles, H. major has bigger morphometrics than H. ovalis. In addition, the number of paired and branching cross veins was reported to be an identification key of H. major. The species was also considered a deep ovalis found in 2-4 m depth. Genetically, the Internal Transcribed Spacer (ITS) gene marker was appropriate to showits phylogenetic tree. H. major was also classified into different clades with H. ovalis due to various factors. The results showed that genetics, tourism, and restoration were topics with the potential to be explored in the future. This study recommended collaborating in multi-institution to transfer knowledge, technologies, and project arrangements for seagrass exploration.Keywords:BibliometricHalophilaMarine angiospermaeMarin plantRediscoverySpecie
Exploration of the ichthyofauna of the Celike River, Leuser Ecosystem Area, East Aceh Regency, Aceh Province
Full text linkIt is necessary to collect data on the species of fish that live in a body of water, one of which is by carrying out an inventory of fish species. The method used is purposive sampling in places that are thought to have lots of fish, are easy to reach and represent the river area. The research parameters in this activity are the level of diversity, level of uniformity, level of dominance, level of species richness, level of similarity, distribution pattern, relationship between length and weight and condition factors. The aim of this research is to provide real benefits in an effort to find out the potential of what species of fish are found in the Leuser Ecosystem, especially the Celike River. There are 13 species of fish found in the Celike River in the Leuser Conservation Area, East Aceh, belonging to 7 families with a total of 132 individuals. The diversity index value is classified as moderate with a value for station 1 of 1.26 and station 4 of 1.49. The highest uniformity index is at station 5 and station 3. The uniformity index value at these stations has the same index (E = stable 0.91). Stations 2, 3, 4, 5 and station 6 have the highest dominance index values in the high category (C=0.87-1.18).Keywords:IchtiofaunaCelike RiverLeuser EcosystemExploratio
Analysis of glucose and amino acid combination for Cherax quadricarinatus growth and characteristics
Full text linkFreshwater crayfish (Cherax quadricarinatus) is a valuable aquaculture commodity with relatively easy cultivation. However, low larval survival during early developmental stages remains a major challenge in its farming. This study aims to evaluate the effects of dissolved glucose and amino acid combinations on growth characteristics, molting frequency, and survival rate. The research was conducted in the Greenhouse of the Faculty of Agriculture, Animal Husbandry, and Fisheries, Universitas Muhammadiyah Parepare, using hatchery-produced crayfish larvae. Four dosage combinations were tested: A) 100 ppm glucose + 250 ppm amino acids, B) 150 ppm glucose + 200 ppm amino acids, C) 200 ppm glucose + 150 ppm amino acids, and D) 250 ppm glucose + 100 ppm amino acids, each replicated three times. The results showed that glucose and amino acid combinations significantly affected crayfish length growth. The highest absolute length growth was observed in the 250 ppm glucose + 100 ppm amino acid group. Meanwhile, the 150 ppm glucose + 200 ppm amino acid combination showed the best performance in molting frequency, number of molting crayfish, survival rate, and percentage of surviving crayfish. The optimal treatment for supporting freshwater crayfish growth and development was the 150 ppm glucose + 200 ppm amino acid combination.Keywords:Cherax quadricarinatusGlucoseamino acidsgrowth characteristicssurvival ratemoltin
Reproductive attributes of the spot-tail shark, Carcharhinus sorrah collected from westernmost waters of Aceh, Indonesia
Full text linkThe spot-tail shark, Carcharhinus sorrah is a species of requiem shark found primarily in warm coastal waters of the Indo-Pacific region. This study aims to assess the length at first maturity and length distribution The spot-tail shark, C. sorrah collected from key fish landing sites in Aceh Province, Indonesia. Data collection occurred between March 2020 and October 2022 at three fishing ports: Banda Aceh (BA), Aceh Barat (AB), and Aceh Barat Daya (ABD). A One-way Analysis of Variance (ANOVA) was employed to analyze the total length (TL) of male and female fish from these sites. Results indicated an overall sex ratio of female to male fish at 1:1.67 ( = 45.19, p 0.001), with significant differences observed in sex ratios between BA and ABD ( = 6.72, p = 0.01; = 41.14, p 0.001), while AB showed no significant difference ( = 1.64, p = 0.20). Logistic regression analysis revealed variations in the length at which 50% of males and females reached maturity (Lm50): males from ABD, AB, and BA were 110.65 cm TL, 117.03 cm TL, and 152.65 cm TL, respectively, while females from BA, ABD, and AB were 107.30 cm TL, 113.94 cm TL, and 116.14 cm TL, respectively. Notably, males from ABD and females from BA matured earlier than those from other sites. In terms of length distribution, the average greatest with standard deviation (SD) length of male C. sorrah was 122.8737.87 cm TL in AB, followed by BA at 113.8013.10 cm TL and ABD at 107.8618.38 cm TL. This species is important for both ecological balance and fisheries, emphasizing the need for effective management and conservation efforts.Keywords:The spot-tail sharkCarcharhinus sorrahsex ratiolength at first maturitywesternmost Indonesi
Feasibility study of functional facilities (ice factory) and level of need for ice supporting capture fisheries activities at the Meureudu Fish Landing Base
No full textPidie Jaya Regency is one of the districts that contributes to capture fisheries production in Aceh Province. Pidie Jaya Harbor is the Fish Landing Base (PPI) in Meureudu. As capture fisheries activities developed at PPI Meureudu, the local government began to pay attention to building several port facilities such as basic facilities, functional facilities and supporting facilities. Supporting facilities or supporting facilities are facilities that support fishing activities at the port, one of these facilities is an ice factory. The ice factory at PPI Meureudu belongs to the Aceh marine and fisheries service which was built in 2012. The Aceh Development Fund (ADF) built an ice factory with a production capacity of up to 30 tons/day at the Meureudu Fish Landing Base (PPI), through an environmentally friendly technology program for industry fishing process. Under normal conditions, the PPI Meureudu ice factory is currently producing ice cubes in excess of fishermen's needs, so ice cubes are sold by fishermen operating in the Peulimbang and Peudada areas, Bireuen Regency. Sometimes, when the fish catch is abundant, ice is not enough to meet the ice needs for ships at PPI Meureudu and must be supplied from Sigli, Pidie Regency. This study aims to determine the need for ice in fishing and handling operations to the feasibility of the ice factory business at PPI Meureudu. This research was carried out for one month, namely in November 2022 at the Meureudu Fish Landing Base (PPI), Meureudu City, Kec. Meureudu, Pidie Jaya Regency. The data used in this study are primary data secondary data. using business feasibility analysis. The results showed that the need for ice blocks at PPI Meureudu for fishing operations within one month was 221.80 tons, and the need for ice for fish handling activities at PPI Meureudu within one month required the amount of ice to be 2,879 blocks of ice or 144,864 tons which is the result of the analysis financial value obtained from the NPV Rp. 95,761,105 can be said to be feasible because the value is greater than 0. At an IRR value of 5% it can be said to be feasible because the results of the IRR calculation are greater than the discount factor, and a Net B/C value of 1 is said to be a breakeven project because = 1. These three values have been carried out in the Meureudu PPI block ice factory business that business it is worth continuing.Keywords:Business FeasibilityIce Block FacilityPidie Jay
Mapping the distribution of potential octopus (Octopus sp.) fishing ground in the waters of Simeulue regency
Full text linkSimeulue Regency has the potential for diverse and abundant marine resources; one of which is octopus (Octopus sp.). However, the problem faced by Simeulue fishermen in carrying out octopus fishing activities is that they only rely on natural phenomena or natural signs studied from generation to generation (traditional) to catch octopus. Therefore, the catch obtained is uncertain and takes a long time. The purpose of this study was to determine the number and weight of octopus catches landed in three sub-districts namely Teupah Barat, Teupah Selatan and Alafan, and then make a map of distribution of potential octopus fishing groud in the three sub-districts. The research method used in this study was a survey method by observing octopus catching units. The results showed that the total number and total weight of octopus catches in three sub-districts from the highest to the lowest were Teupah Barat, amounting to 176 heads and weighing 90,47 kg; Teupah Selatan amounting to 115 heads and weighing to 69,54 kg; and Alafan amounting to 114 heads and weighing to 46,97 kg, where the octopuses caught were all adult categories and fit to be caught. As for the potential areas for octopus fishing in the three sub-districts were as follows: Teupah Barat with 3 potential areas (points E, F and A); Teupah Selatan with 2 potential areas (points E and F); Alafan with only 1 potential point (point K).Keywords:MappingFishing groundOctopusSimeulu
The influence of planting distance on seagrass (Enhalus acoroides) seedling growth
Full text linkSeagrass restoration practice of transplanting grown seagrass from a donor to the planting site is discovered to disrupt the existing ecosystems. An alternative method includesthe use of seedlings, which requires a protected germination environment to survive. At the initial stage, the seedlings need adequate space for growth and expansion of root systems. However, cultivating seagrass seedlings in aquariums is challenging due to limited space. Therefore, this study aimed to investigate the growth and development of aquarium-cultured seagrass seedlings and evaluate the impact of different spacing on growth. Seedlings were cultivated in the laboratory under 2 treatments, each lasting 3 months. Enhalus acoroides seedlings collected from Dompak Island, Tanjungpinang, were used with varying planting distances for each treatment. The results showed that Treatment A (4 cm spacing) had a lower survival rate (66.73%) compared to TreatmentB (1.5 cm spacing) (97.78%) due to a fungus outbreak.However, Treatment B had slower growth than A, suggesting potential problems with water quality and increased competition for resources in denser plantings. In this study, the significance of planting spacing was outlined and a statistically significant difference was discovered in seagrass growth between various treatments (P0.05). A rapid growth rate of 2.08-3.02 mm/day was observed in leafs, which exceeded the value observed in previous investigations conducted under similar conditions and species. It was important to acknowledge that leaf length was also 17.5-21.6 cm, exceeding the values observed in another experiment using lab-cultured E. acoroides. Root lengths were comparatively shorter (7.6-8.2 cm), which signified the dynamic nature of seagrass development. In conclusion, addressing environmental conditions and optimizing planting spacing, was essential for sustainable growth.Keywords:EnhalusGrowthSeagrassSeedlingsSpacin
Production performance and physiological responses of jelawat fish (Leptobarbus hoevenii) breeding maintained in different containers
Full text linkJelawat fish cultivation activities are still experiencing problems with low production. In order to increase the production of jelawat fish seeds during the grow-out phase, research needs to be carried out regarding the type of containers for the cultivation. This research aims to determine the best type of container for jelawat fish (Leptobarbus hoevenii) breeding regarding production performance and physiological responses. This study used a completely randomized design with four different treatments in rearing containers and three replications including aquarium (A), fiber tanks (B), concrete tanks (C) and floating net cages (D). The fish seeds used in this study were 2.76 0.15 cm long and weighed 0.17 0.17 g. During breeding process, the fish were given commercial feed with a protein content of 41% and air changes were carried out at 30% of the total air volume every 2 days. The parameters observed in this research include production performance, physiological responses, and air quality. The research results showed that different types of rearing containers had a significant effect on production performance parameters, total cholesterol, and hemoglobin. Total cholesterol and hemoglobin at the start of cultivation were 191 mg/dL and 11.6 g/dL, decreasing at the end of cultivation to 120.28-141.59 mg/dL and 9.03-12.83 g/dL. Air quality was still within the appropriate range for rearing jelawat fish seeds.Keywords:Aquariumsconcrete tanksfloating net cagestarpaulin pondsjelawat fis