Microplastics contamination in molluscs from mangrove forest of Situbondo, IndonesiaYona, D; Mahendra, B A; Fuad, M A Z; Sartimbul, A
doi: 10.1088/1755-1315/1191/1/012016pmid: N/A
Mangrove ecosystem that lies between the land and the sea is vulnerable from the microplastics pollution caused by both land and marine-based activities. Mangrove ecosystem is home to many different faunas including molluscs and the presence of microplastics could be potential threats to the organisms. Thus, this study was conducted to evaluate the occurrence of microplastics in two different types of molluscs, which were bivalvia (Geloina erosa) and gastropoda (Telescopium telescopium) from the mangrove forest in Situbondo, East Java Province, Indonesia. Microplastics were analysed from 40 individual molluscs representing two different species. Overall, 459 particles of microplastics were retrieved from the samples. All samples of G. erosa contained microplastics particles and only one sample of T. Telescopium was found without microplastic. Four types of microplastics were identified from the samples: fiber, fragment, film and microbeads and fiber were the dominating type in both species. G. erosa contained higher number of microplastics particles than T. telescopium. The result of this study showed that there is a positive relationship between the size of organism and the occurrence of microplastics.
Quality of riparian habitat and its influence on water quality in some ecosystems of waterfalls and springs in Bawean IslandRetnaningdyah, C; Arisoesilaningsih, E; Vidayanti, V; Purnomo, ; Burhanuddin, A D; Febriansyah, S C; Sa’adah, U
doi: 10.1088/1755-1315/1191/1/012010pmid: N/A
This study aims to evaluate the quality of riparian habitats based on the index of riparian quality (QBR), quality of riparian tree vegetation (community structure and Naturalness index), and anthropogenic activity (Hemeroby Index) and their relationship to water quality in some waterfall and spring ecosystems on Bawean Island. This Ex Post Facto study was conducted on six waterfall ecosystems (Candi, Putri, Suwari, Talomon, Laccar and Kuduk Kuduk) and two spring water ecosystems (Kuduk Kuduk and Laccar). Analysis of riparian tree vegetation at each location was observed from three plots with size 50 x 50 m2. The physics chemical quality of water observed at each location included pH, dissolved oxygen/DO, total suspended solid/TSS, total Kjeldahl nitrogen/TKN, and biochemical oxygen demand/BOD. The results showed that the quality of the riparian habitat affected the water quality.
Substitution of Water Hyacinth Flour (Eichhornia crassipes) in Feed on The Growth Performance of Bileh Fish (Rasbora sp.)Islama, D; Diansyah, S; Diana, F; Mariana, R; Muktaridha, O
doi: 10.1088/1755-1315/1191/1/012013pmid: N/A
The objective of the present study was to determine the optimal dose substitution of water hyacinth flour (Eichhornia crassipes) in feed on the growth performance of Bileh (Rasbora sp.) fingerlings. The Completely Randomized Design (CRD) used in this study consisted of four treatments and three replications. Four doses of Eichhornia crassipes were tested: P0 = Feed without substitution of fermented water hyacinth flour as control, P1 = The substitution of fermented water hyacinth flour 5% in feed, P2 = The substitution of fermented water hyacinth flour 10 % in feed, P3 = The substitution of fermented water hyacinth flour 15% in feed. Bileh used as test fish have a length range of 2-2,5 cm. Feed was given three times with at satiation method. Bileh is stored for 30 days. The results showed that the absolute weight growth, absolute length growth, specific growth rate, and feed efficiency were higher in substituting 15% water hyacinth flour in Feed (P3). However, the substitution of water hyacinth flour in Feed had no significant effect on the survival rate and daily growth rate of bileh (P>0.05). The best dose of substitution of water hyacinth flour to increase the growth of Bileh fish and is more economical is 15% in Feed.
Pathway analysis of pH in whiteleg shrimp, Litopenaeus vannamei concrete pond intensifies in Banyuwangi East JavaSupriatna, ; Darmawan, A; Maizar, A
doi: 10.1088/1755-1315/1191/1/012015pmid: N/A
The study aims to understand the pH analysis path model in white shrimp-intensive ponds. The method used is the ex-post-facto analytical analysis by observing changes in the pH of pond water and other water quality parameter factors that affect it—shrimp farming method under the intensively patterned BAPC. The measured water parameters were pH, temperature, salinity, transparency, TOM, carbonate, bicarbonate, and total alkalinity. The collected research data were analyzed by regression and correlation to create a path analysis model for pH. The results showed that changes in the pH of pond water are influenced directly and indirectly by salinity, TOM, and total alkalinity. The most significant direct influence comes from the total alkalinity and the smallest of TOM.
The habitat of Varuna litterata in the bengawan solo riverFariedah, F; Rahayu, S; Marhendra, APW; Arfiati, D
doi: 10.1088/1755-1315/1191/1/012003pmid: N/A
Varuna litterata is a crab that belongs to the Varunidae and has been caught to fulfill the need for the availability of an animal protein source. The purpose of this study was to determine the existing habitat of V. litterata in the Bengawan Solo River Estuary. Sampling of V. litterata was carried out every month for five months in three stations by using fixed nets. Water and substrate quality parameters were measured and examined. The samples of V. litterata that had been obtained were then counted and differentiated based on sex and size. The morphological characteristics were then recorded. The sample was then weighed, the width and length of the carapace were measured. The results showed that the abundance of V. litterata was even at each station. The carapace width distribution was dominated by 3.5-3.99 cm in size. The ratio of male and female individuals is still in balance. The results of this study indicated that V. litterata can be found in waters that are directly opposite the sea and spread as far as 32 km from the estuary. V. litterata can be found in waters that are still affected by tidal currents with salinity ranging from 20-25 ppt, temperature ranging from 31-33.2, river surface water current ranging from 0, 39-0,52 m/s with a textured bottom consisting of silty, clayey, sandy, and muddy.
Update on fish community in the mangrove ecosystems of Banyuasin Regency, South Sumatra, Indonesia, with the addition of the first record of the genus BostrychusHernawati, R T; Wahyudewantoro, G; Wibowo, K; Rusdianto, R
doi: 10.1088/1755-1315/1191/1/012005pmid: N/A
Mangrove ecosystem is one of the unique ecological niches and the ideal habitat for several groups of fishes. The total area of mangroves in Indonesia is estimated at 3,489,140.68 ha. Although many studies have been conducted, there are still many fish species of this ecosystem that have not been revealed. This study aims to determine the fish community in several mangrove hotspots in Banyuasin Regency, South Sumatra. Specimen collection was carried out in May–June 2021 by using various fishing gears including hand net, seine net, and gill net. Water parameters, e.g., pH, salinity, and temperature, were also measured. This research has succeeded in collecting 31 fish species consisting of 20 families and 26 genera with a total of 145 individuals. Gobiidae and Butidae are the two most abundant families in term of number of species with 7 and 4 species, respectively. The remaining families each were represented by 1 species. Oryzias javanicus, Planiliza subviridis, and Ambassis macracanthus had the highest relative abundance values compared to other species. This study also found the first record for Bostrychus cf. scalaris from Indonesian water which B. scalaris was previously known only from Peninsular Malaysia.
Abundance and composition analysis of dinoflagellates in Mayangan and Binor Coastal Area, Probolinggo, East Java, IndonesiaHerawati, E Y; Valina, R; Dini, C A F; Cahyani, V; Khasanah, R I; Wiratno, E N; Samuel, P D
doi: 10.1088/1755-1315/1191/1/012001pmid: N/A
Dinoflagellates are one of the phytoplankton groups that an important role as primary producers in waters. However, in very abundant conditions (blooming) it can be dangerous for ecosystems and aquatic biota. This study aims to determine the composition and abundance of harmful dinoflagellates and environmental factors that influence the presence of dinoflagellates in coastal area of Mayangan and Binor, Probolinggo Regency, East Java. The method used in this study is a survey method by determining the sample point by purposive sampling. The research was conducted in March 2022. The result showed that the abundance of dinoflagellates in Mayangan waters 255 – 1511 cells/mL consisting of 10 genera namely Alexandrium, Ceratium, Dinophysis, Gambierdiscus, Glenodinium, Gymnodinium, Ostreopsis, Peridinium, Phyrodinium, and Prorocentrum. The abundance of dinoflagellates in Binor waters 716 – 2536 cells/mL consisting of 10 genera namely Alexandrium, Amphydinium, Bysmatrum, Cochlodinium, Gambierdiscus, Glenodinium, Gymnodinium, Peridinium, Protoperidinium, and Scrippsiella. The highest genus in Mayangan waters Ceratium 18% and Binor waters Protoperidinium 21%. The abundance of dinoflagellates in the Mayangan and Binor waters has no potential for blooming, but the presence of the dinoflagellate genus in the waters can still endanger coastal ecosystems because it can produce toxins. The presence of dinoflagellates is influenced by environmental factors such as salinity, nitrate, and phosphate.
Peer Review Statementdoi: 10.1088/1755-1315/1191/1/011002pmid: N/A
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.• Type of peer review: Open Review• Conference submission management system: Morressier• Number of submissions received: 20• Number of submissions sent for review: 20• Number of submissions accepted: 0• Acceptance Rate (Submissions Accepted / Submissions Received × 100): 100• Average number of reviews per paper: 2• Total number of reviewers involved: 11• Contact person for queries:Name: Ekwan Nofa Wiratno, S.Si., M.SiEmail: [email protected]: Faculty of Fisheries and Marine Science
Plankton composition in Milkfish’s (Chanos chanos) stomach cultivated in traditional pondArfiati, D; Zebadiah, Z; Safara, R; Orchida, K; Inayah R, Z N; Pratiwi, K
doi: 10.1088/1755-1315/1191/1/012008pmid: N/A
Milkfish is a brackish-water cultured fish that is widely cultivated in traditional ponds because the business capital is relatively small and the feed provided is only from natural food in the form of plankton. This study aims to determine the type of plankton in the stomach and the frequency of feeding occurence milkfish in order to determine the type of plankton preferred by milkfish. This study used a survey method. The composition of plankton found in milkfish consists of 8 divisions, namely Bacillariophyta, Chlorophyta, Cryptophyta, Cyanophyta, Myozoa, Charophyta, Rotifera, and Arthropoda. However, Charophyta and Arthropoda divisions not found in the stomach of milkfish in the Probolinggo pond. The highest composition of plankton in the milkfish stomach in the Pasuruan pond was the Chlorophyta division (38%), while in the pond of Probolinggo, Bacillariophyta division (52.4%). Feeding occurrence frequency of milkfish is in the second pond 100% for the division of Chlorophyta, Cyanophyta, and Bacillariophyta. The similarity index based on the plankton composition in the milkfish stomach from two ponds was around 66.9%, indicating that the similarity of the plankton types consumed by milkfish was sufficiently high between the two ponds. Based on the results of this study, milkfish can be said to be herbivores because in their stomachs there are 99.8% phytoplankton and 0.2% zooplankton.
Effects of fentin acetate molluscicide on biological performance and haematological of the common carp, Cyprinus carpio cultivated at rice field waterSetijaningsih, L; Setiadi, E; Taufik, I
doi: 10.1088/1755-1315/1191/1/012011pmid: N/A
Molluscicide of fentin acetate (C20H18O2Sn) is commonly used at the present due to effective in terms to control of molluscs in the rice field. The aims of this experiment is to determine toxicity effect of fentin acetate on growth, productivity, and blood glucose on the common carp, Cyprinus carpio cultured at rice field water. A 12 of rice field plots with size of 25m2 each were used. The stocking density of common carp was 25 fish/m2 for each rice plot. The culture period of the common carp was 21 days. The different fentin acetate concentration as treatments were as followed M0) without molluscicide; M1) 0.375 g/L of molluscicide; M2) 0.75 g/L of molluscicide); and M3) 1.5 g/L of molluscicide. Statistical analysis using one-way ANOVA with three replicates for each treatment was performed. The result showed that the treatment of molluscicide at 0.75 g/L was significantly different to the others on survival rate and productivity (p<0.05). Application of 0.75 g/L of molluscicide showed a positive correlation on blood glucose value.