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OCEANOGRAPHY (88 journals)

Showing 1 - 77 of 77 Journals sorted by number of followers
Deep Sea Research Part II: Topical Studies in Oceanography     Hybrid Journal   (Followers: 29)
Deep Sea Research Part I : Oceanographic Research Papers     Hybrid Journal   (Followers: 23)
Estuaries and Coasts     Hybrid Journal   (Followers: 23)
Limnology and Oceanography     Hybrid Journal   (Followers: 22)
Progress in Oceanography     Hybrid Journal   (Followers: 21)
Journal of Marine Biology & Oceanography     Hybrid Journal   (Followers: 19)
New Zealand Journal of Marine and Freshwater Research     Hybrid Journal   (Followers: 18)
Journal of Physical Oceanography     Hybrid Journal   (Followers: 18)
Frontiers in Marine Science     Open Access   (Followers: 17)
Journal of Marine Sciences     Open Access   (Followers: 17)
Coastal Engineering     Hybrid Journal   (Followers: 15)
Advances in Oceanography and Limnology     Open Access   (Followers: 15)
Journal of Oceanography     Hybrid Journal   (Followers: 14)
Maritime Studies     Open Access   (Followers: 13)
International Journal of Oceanography     Open Access   (Followers: 12)
Advances in Statistical Climatology, Meteorology and Oceanography     Open Access   (Followers: 11)
Atmospheric and Oceanic Science Letters     Open Access   (Followers: 10)
Bulletin of Marine Science     Full-text available via subscription   (Followers: 9)
Fisheries Oceanography     Hybrid Journal   (Followers: 8)
Journal of Oceanography and Marine Science     Open Access   (Followers: 7)
Open Journal of Marine Science     Open Access   (Followers: 6)
Limnology and Oceanography: Methods     Hybrid Journal   (Followers: 6)
Journal of Operational Oceanography     Hybrid Journal   (Followers: 6)
Physical Oceanography     Hybrid Journal   (Followers: 6)
Paleoceanography and Paleoclimatology     Full-text available via subscription   (Followers: 5)
Marine Science     Open Access   (Followers: 5)
Limnology and Oceanography: Fluids and Environments     Full-text available via subscription   (Followers: 5)
Ocean Yearbook Online     Hybrid Journal   (Followers: 4)
Journal of Oceanology and Limnology     Hybrid Journal   (Followers: 4)
Limnology and Oceanography Letters     Open Access   (Followers: 4)
Journal of Marine Science and Engineering     Open Access   (Followers: 4)
African Journal of Marine Science     Hybrid Journal   (Followers: 4)
Oceanology     Hybrid Journal   (Followers: 3)
Journal of Aquatic Sciences     Full-text available via subscription   (Followers: 3)
Limnology and Oceanography e-Lectures     Open Access   (Followers: 3)
Journal of Coastal Development     Open Access   (Followers: 3)
Ciencias Marinas     Open Access   (Followers: 3)
Journal of Marine Science and Application     Hybrid Journal   (Followers: 3)
Journal of Ocean Engineering and Marine Energy     Hybrid Journal   (Followers: 3)
Tropical Oceanography     Open Access   (Followers: 2)
Indian Journal of Geo-Marine Sciences     Open Access   (Followers: 2)
Mediterranean Marine Science     Open Access   (Followers: 2)
Regional Studies in Marine Science     Hybrid Journal   (Followers: 2)
Annals of Marine Science     Open Access   (Followers: 2)
Limnology and Oceanography: Bulletin     Hybrid Journal   (Followers: 2)
Annals of Limnology and Oceanography     Open Access   (Followers: 2)
Development and Applications of Oceanic Engineering     Open Access   (Followers: 2)
Journal of Ocean Engineering and Technology     Open Access   (Followers: 1)
Acta Aquatica : Aquatic Sciences Journal     Open Access   (Followers: 1)
Ocean Life     Open Access   (Followers: 1)
Marine Systems & Ocean Technology     Hybrid Journal   (Followers: 1)
Marine Life Science & Technology     Hybrid Journal   (Followers: 1)
Journal of Ocean University of China (English Edition)     Hybrid Journal   (Followers: 1)
Journal of Ocean Engineering and Science     Open Access   (Followers: 1)
Coastal Engineering Proceedings : Proceedings of the International Conference on Coastal Engineering     Open Access   (Followers: 1)
Marine Technology Society Journal     Full-text available via subscription   (Followers: 1)
Scientia Marina     Open Access   (Followers: 1)
Western Indian Ocean Journal of Marine Science     Open Access   (Followers: 1)
Asian Journal of Fisheries and Aquatic Research     Open Access  
Thalassas : An International Journal of Marine Sciences     Hybrid Journal  
Oceans     Open Access  
Aquatic Research     Open Access  
Jurnal Kelautan Tropis     Open Access  
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan     Open Access  
Journal of Agricultural and Marine Sciences     Open Access  
Turkish Journal of Maritime and Marine Sciences     Open Access  
Arquivos de Ciências do Mar     Open Access  
Scientific Drilling     Open Access  
Jurnal Kelautan : Indonesian Journal of Marine Science and Technology     Open Access  
Oceanologia     Open Access  
Revista de Gestão Costeira Integrada     Open Access  
Revista Ciencias Marinas y Costeras     Open Access  
Egyptian Journal of Aquatic Research     Open Access  
China Ocean Engineering     Hybrid Journal  
Revista de Biología Marina y Oceanografía     Open Access  
Latin American Journal of Aquatic Research     Open Access  
Acta Oceanologica Sinica     Hybrid Journal  
Similar Journals
Journal Cover
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2089-7790 - ISSN (Online) 2502-6194
Published by Universitas Syiah Kuala Homepage  [19 journals]

    • Authors: . .
      Abstract: .
      PubDate: 2022-12-31
      DOI: 10.13170/depik.11.3.30130
      Issue No: Vol. 11, No. 3 (2022)
  • Performance of intensive vannamei (Litopenaeus vannamei) culture at low

    • Authors: Annisa Bias Cahyanurani, Mochammad Heri Edy
      Pages: 257 - 264
      Abstract: Intensive aquaculture systems that are not managed properly often cause problems that disrupt the balance of the environment so that shrimp are susceptible to disease. One of the aquaculture innovations that have been developed to minimize disease impact is shrimp farming with low salinity. This study aims to determine the performance of intensive Litopenaeus vannamei shrimp culture with low salinity. This study used quantitative descriptive analysis with a purposive sampling technique in three ponds for three maintenance cycles. The result of the study on three cycles of vannamei shrimp culture with low salinity overall found that productivity ranged from 2.35 to 3.69 kg/m2. ADG values in aquaculture ponds ranged from 0.26 – 0.36 g/day. The survival rate ranged from 61% to 98%, and the feed conversion ratio ranged from 1.01 to 1.62. The survival rate tends to increase, and FCR value tends to decrease in 3 cycles of cultivation. Water quality including temperature, dissolved oxygen, pH, phosphate, ammonia, and TOM indicate the optimal range based on water quality standards for intensive vannamei shrimp culture (SNI 01-7246-2006). At the same time, nitrite and alkalinity exceed the SNI standard but this nitrite and alkalinity level could still be tolerated by vannamei shrimp during the rearing period.  Overall, water quality during the rearing period can still support the growth of vannamei shrimp. The above result showed that vannamei shrimp culture at low salinity (6-8 mg L-1) has the potential to be developed.Keywords:
      Intensive culture
      Litopenaeus vannamei
      Low salinity
      PubDate: 2022-10-01
      DOI: 10.13170/depik.11.3.25565
      Issue No: Vol. 11, No. 3 (2022)
  • Performance analysis of catch fisheries in Sabang Waters

    • Authors: Salmarika Salmarika, Imam Shadiqin, Muhammad Irham, Imelda Agustina, Rosi Rahayu, Ratna Mutia Aprilla, Alvi Rahmah
      Pages: 265 - 270
      Abstract: Sabang waters is one of the centers of capture fisheries production at the tip of the Sumatera Island which has a large potential of fish resources. However, information related to the performance of capture fisheries including fish production, fishing gear, fishing fleet, number of fishermen and fishing areas is still limited. This study aims to analyse and describe information related to capture fisheries performances in the waters of Sabang. Performance data were analysed descriptive quantitatively and obtained by survey method. The results showed that the trend of capture fisheries production tends to increase by 15% annually and catches are dominated by large pelagic fish, namely tuna (Thunnus sp). The type of fishery business is dominated by fishermen who operate vessels measuring 0 - 5 GT (57.9%) with fishing areas between the coast to 2 nautical miles. Fishermen in Sabang Waters are categorized as small businesses. because use small boats and using handlines as fishing gear that aim to meet daily needs, not for business scale.Keywords:
      Fish production
      Fishing gear
      Fishing fleet
      Fishing ground
      Capture fisheries
      PubDate: 2022-10-18
      DOI: 10.13170/depik.11.3.22182
      Issue No: Vol. 11, No. 3 (2022)
  • The prevalence and intensity of ectoparasites that infects tilapia
           (Oreochromis niloticus) in floating net cages

    • Authors: Kavinta Melanie, Sayyid Afdhal El Rahimi, Amaliah Suryani, Siska Mellisa, Rianjuanda Djamani, Ratna Mutia Aprilla
      Pages: 271 - 274
      Abstract: Ectoparasites which often attack tilapia include Trichodina sp., Dactylogyrus spp., Gyrodactylus spp., and Epistylis spp. This research aims to determine the types, prevalence, and intensity of ectoparasites found on tilapia (Oreochromis niloticus) in the floating net cages of Batanghari River, Jambi. The research was conducted from February through March 2020. A survey method is carried out through direct sampling at the study site to identify the tilapia ectoparasites. The sampling technique is done using random sampling. Ninety fish were taken for parasite inspection at the Fish Quarantine, Quality Control, and Safety of Fishery Products Class I Jambi Station. The observations found three types of ectoparasites namely Dactylogyrus sp., Epistylis sp., and Oodinium sp. The highest ectoparasite prevalence rate was found from the species Epistylis sp. with a value of 37.7% and an intensity value of 24.7 ind/fish. The prevalence of Dactylogyrus sp. was 26.6% and an intensity value of 1.3 ind/fish. The lowest prevalence value was from Oodinium sp. with a prevalence value of 7.7% and an intensity value of 3.2 ind/fish. The prevalence and intensity values of tilapia ectoparasites based on their locations were 56.6% and 23 ind/fish (station I), 50% and 18.6 ind/fish (station II) and 43.3% and 17.6 ind/fish (station III). The types of ectoparasites found on tilapia in this study were Epistylis sp., Oodinium sp., and Dactilogyrus sp. The parasite with the highest prevalence and intensity found during the survey was Epistylis sp.Keywords:EctoparasitesTilapiaPrevalenceIntensityFloating net cages
      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.23310
      Issue No: Vol. 11, No. 3 (2022)
  • Modification of togok (tidal trap) for reducing bycatch by using BRD vent

    • Authors: Nofrizal Nofrizal, Muhamad Mauliddin, Romie Jhonnerie
      Pages: 275 - 281
      Abstract: One effort to reduce bycatch in togok is to modify the togok by creating a vent to reduce bycatch by BRD. The BRD installed on the togok was a rope BRD vent made of Polyethelene (PE) with a diameter of 2 mm. The rope BRD vent is attached to the top of the cod-end as an escape vent 25 x 50 cm. The escape vent and the stash cod-end are covered with a net with a mesh size of 5 mm. The cover net aims to collect data on fish catches that pass through the rope BRD vent. The percentage of fish that pass through the rope BRD vent can be calculated, and measure the size of the fish caught in the cod-end and covered as an indicator of the effectiveness of the rope BRD vent on togok. This experiment was carried out for 20 days of fishing operation and 40 hauls. The results showed that the catch of togok without rope BRD vent (conventional) and togok with modified rope BRD vent were different (p < 0.05), where the catch of conventional togok was 468.34 kg, and the catch of modified togok was 305.235 kg. The fishing catches in the cod end and cover sections the most are bycatch with 51% and 54% of the percentage of the total catch, and the least in the cod end is the discarded catch, which is 21% of the percentage of the total catch and on the cover is the main catch (main catch) with 19% of the percentage of the total catch.The average size of the catch of togok species of fish is there are many immature sizes, and the average size of the catch of togok species of shrimp is there are in maturity size.Keywords:BycatchBycatch excluder device (BRD)DiscardMain catch 
      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.26067
      Issue No: Vol. 11, No. 3 (2022)
  • Distribution of heavy metal (Pb, Cd and Hg) concentrations in sediment of
           Bone River, Gorontalo

    • Authors: Miftahul Khair Kadim, Endang Herawati Yuli, Diana Arfiati, Asus Maizar Suryanto Hertika, Faizal Kasim
      Pages: 282 - 287
      Abstract: The concentration of three heavy metals Pb, Cd and Hg ware measured in Bone River, Gorontalo sediment. The heavy metal pollution on sediment in Bone River have not been explored longitudinally. The samples were taken in July 2021 at 8 stations.  The trend of metals ware observed in sediment as Pb>Cd>Hg. The level of studied metals Cd and Hg did not exceed the safe limit by ANZECC, OSQG LEL and CCME TEL meanwhile Pb was met the limit by by ANZECC. However, the investigated showed that fluctuations due to differences in the characteristics of each location. Contamination factor (CF) and geoaccumulation index (Igeo) demonstrated that the sediment samples were low contamination and lightly polluted. Contamination by heavy metals in the Bone River implies that the conditions are much frightening for the biota and residents around the river.
      PubDate: 2022-11-02
      DOI: 10.13170/depik.11.3.27775
      Issue No: Vol. 11, No. 3 (2022)
  • Study on shipyard location and model development

    • Authors: Thaib Rizwan, Husaini Husaini, Husni Husin, Akhyar Akhyar
      Pages: 288 - 294
      Abstract: The shipyard location and model highly influence shipyard industry development. This study aims to assess the location feasibility and determine the shipyard model suitable for shipyard industry development in Kutaraja Fishing Port. The study was conducted in Kutaraja Fishing Port. AHP method was used to determine the location and model, then analyzed using the Expert Choice v11 software. The data were collected using questionnaire interviews and further allocated the value using paired comparison scale table. The result shows that the shipyard industry is feasible to be developed in an area where land parameters adjacent to the waters have a maximum value of 37.3% compared with the five other parameters. The suitable shipyard model to be developed in Kutaraja Fishing Port is the slipway type with a value of 46.1%.Keywords:LocationModelShipyard
      PubDate: 2022-11-16
      DOI: 10.13170/depik.11.3.28347
      Issue No: Vol. 11, No. 3 (2022)
  • Reducing ammonia levels in catfish cultivation water using several aquatic

    • Authors: Mustaqim Mustaqim, Mutasar Mustasar, Yusrizal Akmal, Mida Wahyuni, T. Irfan Fajri, Zaitun Ritaqwin
      Pages: 295 - 298
      Abstract: Catfish farming is one of the businesses that is very much in demand by the community, because it can improve the community's economy. However, not all catfish farming businesses can produce maximum results. This can be caused by several factors, both from feed, management and water quality. Decrease in water quality can be caused by feces and fish feed residue. Poor water quality can cause the growth process, physiology and level of fish behavior to be disturbed. Efforts that can be done is to use aquatic plants as phytoremediation. The plants used in this study were Azolla sp, Eichhornia crassipes, Lemna sp, Ipomoea aquatic. The design used in this study was a completely randomized design with 4 treatments and 3 replications. The parameters observed in this study were ammonia levels, pH, and plant population. The results showed that Eichhornia crassipes and Lemna sp were able to reduce ammonia levels in catfish cultured water by <0.01 mg/l at the end of the study.Keywords:AmmoniaWater plantsCatfish
      PubDate: 2022-11-16
      DOI: 10.13170/depik.11.3.27723
      Issue No: Vol. 11, No. 3 (2022)
  • Biological aspects of Diopatra sp. (Onuphidae, Polychaeta) collected from
           mangrove habitats of Jeruklegi, Cilacap Regency

    • Authors: Eko Setio Wibowo, IGA Ayu Ratna Puspitasari, Atang Atang, Joko Pamungkas
      Pages: 299 - 305
      Abstract: Diopatra species are members of the family Onuphidae (Polychaeta, Annelida) that are widely used as fishing bait. These tubicolous worms are common in particular mangrove areas of Cilacap. However, biological aspects of Diopatra sp. inhabiting the areas have not been studied. In the present work, we investigated several biological aspects of the worms, including the segment number, the body weight and the sex ratio, based on Diopatra samples collected from four mangrove habitats of Jeruklegi Village, Cilacap Regency, between June and July 2021. The results show that the average numbers of segments of Diopatra sp. obtained ranged from 195 to 216 segments, whereas the average body weights ranged from 2.03 to 3.12 g, and the average sex ratios ranged from 0.5 to 1.3. In general, the biological aspects of Diopatra sp. between sampling sites were relatively similar; this can be attributed to the similar environmental conditions at all sampling sites, including salinity (25–32 ppt), water temperature (30–32 oC), dissolved oxygen (6.4–8.8 ppm) and pH (7). While Diopatra worm farming is necessary so that local people do not rely on natural catch, a further taxonomic study is required to reveal the identity of this economically important local species.Keywords:Biological aspectDiopatraMangrove habitatPolychaetesTubicolous worms
      PubDate: 2022-11-22
      DOI: 10.13170/depik.11.3.25787
      Issue No: Vol. 11, No. 3 (2022)
  • The influences of the Indian Ocean Dipole (IOD) on rainfall in South Aceh

    • Authors: Ratna Permatasari, Yopi Ilhamsyah, Syahrul Purnawan, Ichsan Setiawan, Mutia Ramadhaniaty, Sutarni Sutarni, Eko Cahyo Pristiwantoro
      Pages: 306 - 312
      Abstract: This study aimed to examine the influences of the Indian Ocean Dipole (IOD) on rainfall in three districts in South Aceh. The analysis was undertaken using Dipole Mode Index (DMI) data and five years of rainfall (2016 to 2020) in West Labuhan Haji, Tapak Tuan, and Bakongan areas. This research employed a correlation analysis and the Principal Component Analysis, followed by Cluster Analysis to investigate the relationship between IOD and rainfall at the study location. The negative IOD occurred in 2016, and the positive IOD occurred in 2017, 2018, 2019, and 2020. The strongest positive DMI was in October 2019 (1.123˚C), while the strongest negative DMI was in July 2016 (0.661˚C). Generally, the sub-districts of West Labuhan Haji, Tapak Tuan, and Bakongan always have high rainfall. The highest rainfall in West Labuhan Haji was recorded in January 2017 (1014 mm/month), in Tapak Tuan in November 2017 (1073 mm/month), and in Bakongan in July 2020 (605 mm/month). The correlation between DMI and rainfall in the three locations shows different findings. Although it was very small, the IOD affected the rainfall in West Labuhan Haji, Tapak Tuan, and Bakongan. In West Labuhan Haji, the highest correlation was in lag 1 (0.188); in Tapak Tuan, the highest correlation was in lag 2 (0.156), while in Bakongan, the highest correlation was in lag 2 (-0.191). The correlations in these three locations are considered weak. Thus, the IOD is not the main factor affecting the rainfall in West Labuhan Haji, Tapak Tuan, and Bakongan. As South Aceh is located in windward, the orographic effect may influence high rainfall in this region.Keywords:DMIRainfallPrincipal component AnalysisWest Labuhan HajiTapak TuanBakongan
      PubDate: 2022-11-18
      DOI: 10.13170/depik.11.3.25984
      Issue No: Vol. 11, No. 3 (2022)
  • The effect of aquous extract of johar leaves (Senna siamea) injection on
           survival rate and blood profile of snakehead fish (Channa striata)

    • Authors: Amalia Sutriana, Budianto Panjaitan, Tasya Luthfiah Siddik, Farida Farida, Muhammad Hanafiah, Nuzul Asmilia, Rosmaidar Rosmaidar, Rahmad Rahmad
      Pages: 313 - 318
      Abstract: Aqueous extract of johar leaf contains metabolite compounds such as flavonoids, sponins, tannins, phenols, anthraquinones, anthocyanins, and cardiac glycosides which can be used to substitute commercial antibiotics. The use of aqueous extract of johar leaf has been known to have antibacterial activity in vitro. This study aims to determine the effect of aqueous extract of johar leaves (Senna siamea) injection on survival and blood profile of snakehead fish (Channa striata) in vivo. This research was a laboratory study using a completely randomized design (CRD) with 5 treatments and 3 replications with a total sample of 75 snakehead fish. The fish in KA, KB, KC and KD groups were injected with aqueous extract of johar leaves with concentrations of 10%, 20%, 40%, and 60% respectively, while in KE group the fish was injected with distilled water (control). The parameters of this study were the survival rate and blood profile of snakehead fish. Blood hematology examination included calculation of erythrocyte count, hemoglobin level, and hematocrit percentage, leukocyte count, and thrombocyte count. The research data obtained were analyzed using one-way analysis of variance and followed by Duncan's Multiple Distance test. Injection of aqueous extract of johar leaf did not affect the survival rate of snakehead fish. However, hemoglobin and platelet levels significant decrease in the group given 60% concentration of aqueous extract of johar leaf. It can be concluded that aqueous extract of johar leaf at a concentration of 10%, 20%, 40% is safe to use in snakehead fish.Keywords:Johar leaves extractSnakehead fishBlood profileSurvival rate
      PubDate: 2022-11-22
      DOI: 10.13170/depik.11.3.26841
      Issue No: Vol. 11, No. 3 (2022)
  • Improving quality of cassava peel meal as raw material for tilapia feed

    • Authors: Achmad Noerkhaerin Putra, Unah Indayah, Nokiyah Nokiyah, Mas Bayu Syamsunarno
      Pages: 319 - 326
      Abstract: Cassava peel meal (CPM) has potential as a raw material for fish feed due to its abundant availability and good nutritional content. The high crude fiber content inhibits the use of CPM as a raw material for fish feed. Therefore, this study aims to evaluate the effect of Aspergillus niger fermentation of CPM on dietary nutrient digestibility and growth performance of tilapia (Oreochromis niloticus). It was conducted in 2 stages. The first stage was a fermentation process of CPM, which used a factorial randomized design consisting of a dose difference of A. niger, namely 10, 15, 20, 30 and a fermentation time of 0, 12, 24 hours with 3 replications each. At a dose of 1.5% of A. niger during 24 hours of fermentation, the crude fiber content of fermented CPM was reduced up to 7.19%. the second stage was a 45 days feeding trial on tilapia used a completely randomized design consisting of 3 different treatments with 3 replications, namely: reference feed, unfermented cassava peal meal based diet (CPMD), and A. niger fermented CPMD. A. niger fermented CPMD showed an increase in growth, dry matter, protein, energy, and raw material digestibility, as well as daily growth rate compared to unfermented CPMD. The daily growth rate of fermented CPMD of 1.32%/day was significantly higher with P<0.05 than the unfermented CPMD of 0.72%/day. Furthermore, the digestibility value of material test in the fermented CPMD (48.73%) was significantly higher (P<0.05) than unfermented CPMD (11.74%). These results indicate that A. niger fermented CPM has the potential to be used as raw material for tilapia fish feed. Keywords:
      Aspergillus niger
      Crude fiber
      PubDate: 2022-10-01
      DOI: 10.13170/depik.11.3.24620
      Issue No: Vol. 11, No. 3 (2022)
  • The effect of cryoprotectant on the viability and motility of goldfish
           Carassius aurtus sperm after 48 hours refrigerated

    • Authors: Nurlaili Nurlaili, Itsnatani Salma, Kartini Eriani, Siti Maulida, Zainal Abidin Muchlisin
      Pages: 327 - 332
      Abstract: The principle of sperm preservation is to prolong the viability of spermatozoa by reducing the degree of metabolism during storage at low temperatures, and one method involved was a cryoprotectant as a sperm protector. This study aimed to determine the best type of cryoprotectant for refrigeration storage of goldfish Carrasius auratus sperm. A completely randomized design was used, and five types of cryoprotectant were tested, namely Methanol, Ethanol, Ethylene Glycol, Glycerol, and DMSO at a 10% concentration combined with 15% egg yolks. The sperm was diluted with Ringer’s solution and stored at 4⁰C for 48 hours. The ANOVA test revealed that cryoprotectant significantly affected the motility and viability of sperm after 48 hours of refrigeration (P<0.05). The results showed that 10% DMSO combined with 15% egg yolk could maintain sperm motility and viability better than other treatments, with values of 85.80% and 86.50%, respectively, which were significantly different from the other treatments. Glycerol produced the second-best sperm quality with motility and viability values of 71.13% and 74.13%, respectively. Therefore, DMSO is the most effective cryoprotectant for refrigeration storage of goldfish sperm.
      PubDate: 2022-11-23
      DOI: 10.13170/depik.11.3.28480
      Issue No: Vol. 11, No. 3 (2022)
  • Application of fermented product feed to growth performance of fish: A

    • Authors: Muhamad Dwi Cahya, Yuli Andriani, Kiki Haetami, Risdiana Risdiana
      Pages: 333 - 340
      Abstract: Aquaculture activities cannot be separated from the availability of artificial feed, even 70% of the total production cost is spent on feed, so the availability of good feed, in terms of quality and quantity, is an effort to maintain the success of aquaculture activities. Feeds with high protein have relatively higher prices because some of their raw materials still rely on imports from other countries. The solution to this problem is to use alternative feed ingredients that have good nutritional content, are easy to obtain and do not compete with humans. Organic waste originating from food scraps and agricultural industry residues has considerable potential. However, it is necessary to have a fermentation process as an effort to improve the nutrition and quality of these materials. The purpose of this paper is to determine the extent of utilization of fermented organic waste as fish feed ingredients that can help improve fish growth performance.Keywords:Alternative feed ingredientsFermentationFish feedOrganic waste

      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.26361
      Issue No: Vol. 11, No. 3 (2022)
  • Antioxidant activity of silver nanoparticles synthesized using Holothuria
           atra extract

    • Authors: Irwan Irwan, Mutia Ramadhaniaty, Eli Nurliza
      Pages: 341 - 346
      Abstract: Sea cucumber (Holothuria atra) was used as a reducing and capping agent in the green synthesis process to produce silver nanoparticles (AgNPs). The antioxidant activity of the generated silver nanoparticles was then evaluated. Seacucumber extract was mixed with the AgNO3 solution and homogenized using a magnetic stirrer to create the silver nanoparticles. It was determined that silver nanoparticle production had occurred using a UV-Vis spectrophotometer. Before being examined for antioxidant activity, the generated nanoparticles were first given a characterizing using Fourier Transform Infra Red (FTIR) spectrometers. The maximum uptake was obtained at wavelengths of 440 cm-1 using a UV-Vis spectrophotometer. Functional groups that play a role in the synthesis of nanoparticles were -OH- C=O, and –C-O groups. The free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) with an absorbance maximum (517 nm) was used for antioxidant properties. The antioxidant assay showed that Silver nanoparticles had higher antioxidant activity than sea cucumber extract alone, with an IC50 value of 4 ppm.Keywords:AntioxidantSeacucumberGreen SynthesisSilver NanoparticlesDPPH 
      PubDate: 2022-12-08
      DOI: 10.13170/depik.11.3.28485
      Issue No: Vol. 11, No. 3 (2022)
  • Stock conditions and status of blue swimming crab (Portunus pelagicus) in
           Demak water area, the northern coast of Central Java

    • Authors: Aisyah Nur Nabila, Am Azbas Taurusman, Budy Wiryawan, Mochammad Riyanto
      Pages: 347 - 454
      Abstract: Blue swimming crab (Portunus pelagicus) is the dominant catch in Betahwalang, Demak, and the most important export fish commodity, particularly to USA. The high demand for this crab has been promoting an excessive fishing effort, causing a decrease in the crab's natural stock. This study aims to investigate the biological condition of P. pelagicus on the northern coast of Central Java and assess the crab stock exploitation status in this study area. Carapace width, body weight, Gonad Maturity Stages (GMS), and sex of crab samples were collected from the fishers and collectors landing sites or meeting points. This study employs a simple random sampling technique with no replacement. This study revealed that the maximum carapace width of female crabs was 56-164 mm, and the estimated carapace width at first maturity (Lm) was 98.2 mm. The relationships between carapace width and body weight between male and female crabs indicated positive and negative allometric growth patterns. During this assessment, the P. pelagicus stock indicated an 'over-exploited’ status, with an LB-SPR parameter of 19 percent and an exploitation rate (E) of 0.66. Management measures such as minimum legal size, reduced effort, and open-close areas and seasons should be implemented to achieve sustainable use of the crab fishery.Keywords:Blue swimming crabFishing gearDemak watersCarapace lengthSpawning potential ratio
      PubDate: 2022-10-05
      DOI: 10.13170/depik.11.3.24226
      Issue No: Vol. 11, No. 3 (2022)
  • Relationship of ENSO (El Niño – Southernoscillation ) and monsoon index
           on variability of rainfall and sea surface height in coastal City
           Semarang, Central Java

    • Authors: Rosyidah Rosyidah, Kunarso Kunarso, Elis Indrayanti
      Pages: 455 - 462
      Abstract: The city of Semarang is one of the coastal areas in Indonesia that is prone to flooding. Flood events that often occur in the Semarang City area can be triggered by high rainfall. Variations in rainfall and sea level are closely related to global atmospheric circulation such as ENSO and regional atmospheric circulation, Monsoon. This study aims to examine the relationship between ENSO and Monsoon with the distribution of rainfall and sea level in coastal city Semarang from 2012 to 2021. Correlation and composite analysis were used to analyze the relationship and impact of ENSO and Monsoon phenomena on rainfall and sea level. The results showed the strong correlation of the ENSO index (Southern Oscillation Index) to rainfall in the JJA and SON periods. Generally, El Niño (La Niña) has an impact on increasing (decreasing) rainfall. Meanwhile, Australian Summer Monsoon Index (AUSMI) only strongly correlates with rainfall in the SON period. The westerly (eastern) wind indicated by a positive (negative) monsoon index in the SON period has the effect of increasing (reducing) rainfall. The ENSO phenomenon with sea level during the JJA period has a strong relationship. In JJA, the highest sea level (maximum tide) rises by 12.6 cm during El Niño and decreases by 0.6 cm during La Niña. Meanwhile, the lowest sea level (minimum low tide) decreased by 16.6 cm during El Niño and increased by 0.7 cm during La Niña. These results can explain the influence of global and regional atmospheric circulation on a local scale on the coast of Semarang City.Keywords:RainfallSea levelEl NiñoLa NiñaMonsoon
      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.26699
      Issue No: Vol. 11, No. 3 (2022)
  • The addition of papaya seed flour (Carica papaya) to the growth of
           ‘Cantang’ hybrid grouper fish (Epinephelus fuscoguttatus> <
           Epinephelus lanceolatus)

    • Authors: Muhammad Bahrus Syakirin, Linayati Linayati, Tri Yusufi Mardiana, Sisca Yuniarty, Muhammad Zulkham Yahya
      Pages: 463 - 468
      Abstract: This research was carried out to examine the effects of papaya seed flour at different doses on the growth of hybrid groupers and to determine the most optimal dose of papaya seed flour on fish growth. A complete randomized design with 4 treatments and 3 replications was used, which treatments consisted of: treatment A Without papaya seed flour (Control), treatment B with 2.5 grams/kg of papaya seed flour, treatment C with 5 grams of papaya seed flour per kg feed, and treatment D of 7.5 grams papaya seed flour/kg feed. Treatment C was found the most optimal treatment, resulting in an absolute biomass value of 26.97 grams and feed conversion ratio of 1.19. Analysis of variance (ANOVA) of the absolute biomass development of the hybrid grouper obtained an F count of 41.3892 higher than F table of 5%, indicating significant effects on the fish growth. The water quality was set at an ideal level, with temperature ranging between 28-29 0C, pH between 7.0-7.5 and salinity between 30-33 ppt.Keywords:Hybrid groupersPapaya seed flourGrowth
      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.27702
      Issue No: Vol. 11, No. 3 (2022)
  • Trophic status analysis and estimation of fish production in Aneuk Laot
           Lake aquatic resources management, Sabang City

    • Authors: Nurfadillah Nurfadillah, Irma Dewiyanti, Sri Riska Rahayu, Siswani Sari, Indri Karina, Hasfiandi Hasfiandi
      Pages: 469 - 475
      Abstract: Aneuk Laot Lake is located in Sabang City, Weh Island, Aceh Province. Changes in water quality can affect the life of aquatic organisms found in Aneuk Laot Lake. The purpose of this research estimates fish production and trophic status for the aquatic resource management of Aneuk Laot Lake, Sabang. This research was conducted in September 2019 in Lake Aneuk Laot using the TRIX, TSI (Trophic State Index) and Nygaard index methods to determine fish production and trophic status. Observation stations were determined using stratified random sampling method and analysis of chlorophyll-a was done using the Trichomatic method. The results showed that the waters of Aneuk Laot Lake can be categorized as eutrophic to hypereutrophic. The estimated value of fish production in Aneuk Laot Lake based on the chlorophyll-a approach is 109.84 kg/ha/year, with a lake area of 61.6 ha. Water quality parameters are still in a state that can be tolerated by aquatic organisms in Aneuk Laot Lake.Keywords:Fish production potential Water qualityTRIX indexBiomass productionWater productivity
      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.27499
      Issue No: Vol. 11, No. 3 (2022)
  • Identificaton of grouper parasites (Epinephelus coioides) in Talawi
           District, Batubara Regency

    • Authors: Rumondang Rumondang, Harmayani Harmayani, Heri Prasuhandra Manurung, Adlidar Putri, Ingka Sari
      Pages: 476 - 482
      Abstract: Batu Bara Regency is a region with abundant natural resources, one of which is the cultivation of grouper fish. Grouper is a member of the Serranidae family of coral reef fish. Many groupers are raised in ponds, which makes them susceptible to disease due to environmental and dietary factors that are not adapted to grouper fish, which is a native species. Parasites are one of the grouper-infecting diseases that, if left untreated, can result in mass mortality and harm farmers. The aim of this study was to identify parasites in ponds in Mesjid Lama Village, Talawi District, so that it would be easier to determine the type of parasite, its level of attack, and subsequent efforts to eradicate it. This research employs a sampling technique, specifically a random sampling of orange-spotted grouper. The results of the performed analysis include analyses of both ectoparasites and endoparasites. Several types of ectoparasites were identified, including Cryptocaryon irritans, Pseudorhabdosynochus sp, Benedenia epinepheli, and Caligus sp, while Prosorynchus sp was identified as the endoparasite. The most prevalent parasite found in the fish is Cryptocaryon irritans.Keywords:
      PubDate: 2022-10-15
      DOI: 10.13170/depik.11.3.27131
      Issue No: Vol. 11, No. 3 (2022)
  • Analysis of changes in mangrove ecosystems in Banda Aceh city 17 years
           after the 2004 tsunami

    • Authors: Maulana Gogo, Faisal Abdullah, Saumi Syahreza, Muhammad Budi
      Pages: 483 - 490
      Abstract: Mangrove has the most important role especially in the coastal area. The existence of mangrove habitats in Banda Aceh which got decreasing and loss after tsunami disaster in 2004. The purpose of this study was to the distribution of mangrove in Banda Aceh divided into five (5) sub districts including Jaya Baru, Kuta Alam, Kuta
      Raja, Meuraxa, and Syiah Kuala. This study the mangrove changes after tsunami 2004, began from 2005, 2010, 2015, and 2022. The main data used in this study are Landsat 5 and Sentinel 2A images. Methods of image processing applied in this study are NDVI analysis and supervised classification-based image classification. The
      results are able to show the changes of mangrove area in Banda Aceh from 2004 to 2022. Mangrove area in 2005 is 28.89 ha, 2010 is 81.38 ha, 2015 is 180.27 ha, and 2022 is 121.34 ha. It can be seen that there is a decreasing of mangrove area from 2015 to 2022. The analysis results are also able to show that Kuta raja sub district has the largest mangrove area of 60.11 ha or 49.54 % of the overall area. According to the overall results, it can be said that remote sensing satellite images such as Landsat and Sentinel 2A are very useful in conducting the spatio-temporal research from the long-term periods. This study is hoped to be able to become a reference data in efforts to restore the mangrove in Banda Aceh in order to create the sustainable ecosystem area.Keywords:
      Mangrove ecosystems
      Supervised classification
      Spatio temporal
      PubDate: 2022-12-20
      DOI: 10.13170/depik.11.3.28515
      Issue No: Vol. 11, No. 3 (2022)
  • Prevalence and abundance of coral disease in Aceh Besar regency Aceh,

    • Authors: Maria Ulfah, Iqbal Nindo Turnip, Chitra Octavina, Irma Dewiyanti, Syahrul Purnawan
      Pages: 490 - 496
      Abstract: The aims of this research was to  knew the prevalence, abundance and types of coral diseases detected in Peukan Bada Aceh Besar Regency. Method used in this research was a 20x2m belt transect with 3 replicates. Results show that the prevalence value was between 27,94% – 58,25%. The value was quite higher if compared with other prevalence on some place in indonesia. Average value of coral disease abundance in this research was 0,23 ind/m2. There was 13 types of coral disease found during sampling, including Fish Bite, Drupella Predation, Acanthaster planci Predation, White Syndrome, Ulcerative White Spot, Focal Bleaching, Non-Focal Bleaching, Invertebrate Galls, Sponge Overgrowth, Cyanobacteria, Pigmentation Response, Sedimentation Damage, Algae Overgrowth. The most infected coral genus was Acropora with branching growth form.Keywords:AbundanceConditionCoral diseasePrevalence
      PubDate: 2022-10-31
      DOI: 10.13170/depik.11.3.26593
      Issue No: Vol. 11, No. 3 (2022)
  • Plankton potential as bioindicator of trophic status of Lokop River Leuser

    • Authors: Andri Yusman Persada, Suri Purnama Febri, Kartika Aprilia Putri, Herlina Putri Endah Sari, Rianjuanda Djamani
      First page: 497
      Abstract: Lokop is one of the villages in East Aceh which has a watershed in the Leuser Ecosystem. Human activities have the potential to disrupt the Trophic Status of Lokop River, such as the use of pesticides for agriculture, household waste and the use of potassium for fishing. It is necessary to research the quality of the waters in the Lokop River. The plankton community present in river waters can be an indicator of environmental pollution by analyzing the saprobic index. This study aims to determine the index of plankton diversity and water quality in the Leuser Ecosystem of the Lokop River through the saprobic index. The research was conducted at three stations. A sampling of plankton was taken in the form of a 10 cc filtrate and five replications were carried out for each study site. Water quality measurements include pH, TDS, Temperature, transparancy, depth, and current. 11 potential species can be used as pollution indicators in the Lokop River, namely Cladophora sp, Diatoma elongatum, Fragilaria capucina, Oedogonium sp., Gonatozygon sp, Lyngbya agardh, Melosira sp., Merismopedia punctata, Microspora sp, Pinnularia sp, Synedra ulna. The plankton diversity index is in the medium category. Based on the Saprobic Index, the level of pollution at the research site was not to lightly loaded of organic pollution and lowly loaded of organic pollution.Keywords:
      PubDate: 2022-11-23
      DOI: 10.13170/depik.11.3.25034
      Issue No: Vol. 11, No. 3 (2022)
  • Detection parasites of Indian Mackerel (Rastrelliger kanagurta) in North
           Sumatera, Indonesia

    • Authors: Eri Yusni, Luvi Syafrida Handayani
      Pages: 503 - 507
      Abstract: The purpose of this study was to identify ectoparasites and their prevalence infecting Rastrelliger kanagurta in North Sumatera, Medan. So far, people use this fish as a processed product. The method used in this study is a survey method with direct collection at the research site. Samples were taken using random sampling technique. Sampling was carried out in five places in Belawan with the number of samples studied as many as 30 individuals with an average length of 25.3 cm and a weight of 193.7 grams. Identification was carried out in a laboratory using a light microscope at the Faculty of Agriculture, University of North Sumatra. The results of this study found seven types of parasites that infect the surface in the muscles, fins and gills. The parasites found in their respective prevalence were infected Dactylogyrus sp. 13.33% was found in muscus, Austrobdella sp. 30% found in fin. While the parasites found in the gills were Zoothamnium sp as much as 6.67%, Diphyllobothrium sp as much as 16.67%, Rhadinorynchus sp. 53.33%, Camallanus sp. 20% and Anisakis sp. 3.33%. Rhadinorynchus sp. is the parasite with the highest prevalence rate, found on the scales, gills and fins respectively of mackerel.
      PubDate: 2022-12-27
      DOI: 10.13170/depik.11.3.26814
      Issue No: Vol. 11, No. 3 (2022)
  • Description scleractinian coral from Miang Island, East Kalimantan

    • Authors: Rosdianto Rosdianto, Sayyid Afdhal El Rahimi, Adrian Kryk, Sulastri Arsad, Oktiyas Muzaky Luthfi, M Azurea Bahri Luthfi
      Pages: 508 - 516
      Abstract: The exact number of coral species in Indonesia is not unclear yet, in 2002 the coral taxonomist, JEN Veron, stated 590 species, and it was supported by an Indonesian coral taxonomist, Suharsono, eight years later. The current coral species data is 605 but it is from Coral Triangle Region area (CT).  The eastern of Indonesia, which is located in the Coral Triangle Region, has received a lot of attention from coral researchers, due to coral species that have been described. On the other hand, the coral reef from the western part of Indonesia, including in the East Kalimantan, has not been explored much in recent times. Through the ecoregion view, E. Kalimantan region is clustered into ecoregion 43 (Sulu Sea) which has 540 coral species. Miang Island is one of the inhabited islands from E. Kalimantan, and has an unexplored coral reef ecosystem. The method had been used in this research is descriptive, which uses photos of live corals to describe colony characteristics corals. The results of the study have described 36 species of coral and several invertebrates that make up coral reefs on Miang Island.Keywords:Hard coralAcroporaPoritesIdentificationPulau Miang
      PubDate: 2022-12-27
      DOI: 10.13170/depik.11.3.29277
      Issue No: Vol. 11, No. 3 (2022)
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