Pub Date : 2022-06-25DOI: 10.20884/1.oa.2022.18.1.957
V. Akinjogunla, O. O. Soyinka
The size composition, growth pattern and condition factor of One thousand, two hundred and sixty (1260) mangrove oyster - Crassostrea tulipa (C. tulipa) from the mangrove swamp, Lagos Lagoon were studied using recommended morphometric methods. The total shell length ranged from 1.5cm to 18.4cm, maximum width ranged from 1.5cm – 10.4cm and the total weight was between 1.92g – 132.1g. The oysters showed a unimodal size distribution. Also, there is strong significant correlation between the shell total length and the total flesh weight suggesting that an increase in length gives a corresponding increase in weight of an individual oyster. The total length-total weight and total weight-flesh weight relationships were positively correlated with calculated “b†of 0.5826 and 0.5887 for combined sexes respectively. Negative allometric growth observed was verified from the b < 3 value. The condition factor of the oysters ranged between 6.5 and 10.5 for both male and female species indicating that the species are in good condition despite reported contaminations of the lagoon water.Keywords: Bivalve, C. tulipa, Lagos Lagoon, length-weight.
{"title":"Morphometric Assessment and Condition Factor of the Mangrove Oyster from a tropical mangrove swamp, off Lagos Lagoon, South-West, Nigeria","authors":"V. Akinjogunla, O. O. Soyinka","doi":"10.20884/1.oa.2022.18.1.957","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.957","url":null,"abstract":"The size composition, growth pattern and condition factor of One thousand, two hundred and sixty (1260) mangrove oyster - Crassostrea tulipa (C. tulipa) from the mangrove swamp, Lagos Lagoon were studied using recommended morphometric methods. The total shell length ranged from 1.5cm to 18.4cm, maximum width ranged from 1.5cm – 10.4cm and the total weight was between 1.92g – 132.1g. The oysters showed a unimodal size distribution. Also, there is strong significant correlation between the shell total length and the total flesh weight suggesting that an increase in length gives a corresponding increase in weight of an individual oyster. The total length-total weight and total weight-flesh weight relationships were positively correlated with calculated “b†of 0.5826 and 0.5887 for combined sexes respectively. Negative allometric growth observed was verified from the b < 3 value. The condition factor of the oysters ranged between 6.5 and 10.5 for both male and female species indicating that the species are in good condition despite reported contaminations of the lagoon water.Keywords: Bivalve, C. tulipa, Lagos Lagoon, length-weight.","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47041372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-25DOI: 10.20884/1.oa.2022.18.1.964
H. Hartoyo, A. Amron, A. Fitri, Y. Darmanto
Anthropogenic activities have the potential to put pressure on the marine environment. Crude oil was one of the pressure that give rise to any response of the aquatic organism, such as sound. This study aimed to analyze the sound productivity of spiny lobster Panulirus homarus (Linnaeus, 1758) in waters contaminated with crude oil. Observation of lobster sound was carried out on a laboratory scale using the passive acoustic method. A hydrophone and Closed Circuit Television (CCTV) camera coupled with a decoder and personal computer used to record the movements and sounds of P. homarus during the treatment of crude oil at concentrations 1; 5; 10 and 100 mgL-1. The result showed that crude oil contamination in water was impacted the sound productivity of P. homarus. In the low concentration of crude oil (1 - 5 mgL-1), P. homarus was responded with more sound produced. Afterwar, until concentration off 10 mgL-1, the response of P homarus showed different between individuals. In the 100 mgL-1 concentration, the sound productivity of all P. homarus was decreased. Based on this study, we concluded that the sound of P. homarus has the potential as an indicator of water pollution.Keywords: Panulirus houmarus, crude oil, fish sound
{"title":"Sound Productivity of Spiny Lobster Panulirus homarus (Linnaeus, 1758) due to Crude Oil Contamination","authors":"H. Hartoyo, A. Amron, A. Fitri, Y. Darmanto","doi":"10.20884/1.oa.2022.18.1.964","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.964","url":null,"abstract":"Anthropogenic activities have the potential to put pressure on the marine environment. Crude oil was one of the pressure that give rise to any response of the aquatic organism, such as sound. This study aimed to analyze the sound productivity of spiny lobster Panulirus homarus (Linnaeus, 1758) in waters contaminated with crude oil. Observation of lobster sound was carried out on a laboratory scale using the passive acoustic method. A hydrophone and Closed Circuit Television (CCTV) camera coupled with a decoder and personal computer used to record the movements and sounds of P. homarus during the treatment of crude oil at concentrations 1; 5; 10 and 100 mgL-1. The result showed that crude oil contamination in water was impacted the sound productivity of P. homarus. In the low concentration of crude oil (1 - 5 mgL-1), P. homarus was responded with more sound produced. Afterwar, until concentration off 10 mgL-1, the response of P homarus showed different between individuals. In the 100 mgL-1 concentration, the sound productivity of all P. homarus was decreased. Based on this study, we concluded that the sound of P. homarus has the potential as an indicator of water pollution.Keywords: Panulirus houmarus, crude oil, fish sound","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44808819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-25DOI: 10.20884/1.oa.2022.18.1.895
B. Setyadji, R. R. Zedta
The study focused on stock health bioindicator of skipjack tuna (i.e., size structure, length-weight relationship, and length-at-first-capture/Lc), which can be used as a reference for species-specific stock assessment in the western part of Sumatra waters. All size data were acquired from Kutaraja, Aceh, and Sibolga, North Sumatra, as part of the enumeration program, courtesy of the Research Institute for Tuna Fisheries, from January 2016 to December 2020. The result showed that the skipjack stock’s health is heading in an unsustainable direction. Further management actions are imminent to prevent any stock from declining shortly.Keywords: length-weight relationship, growth pattern, catch-at-size
{"title":"Stock Health Bioindicator of Skipjack Tuna, Katsuwonus pelamis (Linnaeus, 1758) From Purse Seine Fishery in Western Part of Sumatra","authors":"B. Setyadji, R. R. Zedta","doi":"10.20884/1.oa.2022.18.1.895","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.895","url":null,"abstract":"The study focused on stock health bioindicator of skipjack tuna (i.e., size structure, length-weight relationship, and length-at-first-capture/Lc), which can be used as a reference for species-specific stock assessment in the western part of Sumatra waters. All size data were acquired from Kutaraja, Aceh, and Sibolga, North Sumatra, as part of the enumeration program, courtesy of the Research Institute for Tuna Fisheries, from January 2016 to December 2020. The result showed that the skipjack stock’s health is heading in an unsustainable direction. Further management actions are imminent to prevent any stock from declining shortly.Keywords: length-weight relationship, growth pattern, catch-at-size","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47569628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-25DOI: 10.20884/1.oa.2022.18.1.901
Ahmad Uzair Baihaqi, H. Handajani, Wanda Rahmania, H. Heryanto
Climbing perch (Anabas testudineus) has a high economic value. Females grow faster than males. Sex reversal is one of genetic engineering by manipulating their hormone that is able to change the phenotype from male to female or vice versa. “Cepoka†eggplant (Solanum torvum) has been known as a medicinal and kitchen ingredient. Phytochemical test on S. torvum showed revealed that this plant contains tannins, saponins, flavonoids, steroids, alkaloids and terpenoids. Solasodine is a steroidial glycoalkaloid compound contained in S. torvum which has anti-fertility effects. Besides solasodine, the content of Gosipol in phenol compounds with BM 518.55 Dalton also has been known to be able to inhibit spermatogenesis by reducing the concentration, motility and viability of spermatozoa. The solasodine contained in S. torvum has the potential to be used for sex transfer in A. testudineus. Based on many studies, the utilize of solasodine from S. torvum could decrease the motility of spermatozoa. Even the results of the histological test on spermatogenesis, S. torvum gave a positive trend in inhibiting tilapia testicular cells in microscopic observation. Based on it, the chances of successful feminization of S. torvum utilizing cepoka eggplant are very high. A factor that must be considered in feminization is the age of the larvae, immersion dosige, immersion time and environment.Key Words : eggplant, Climbing perch, sex reversal, spermatozoa, solasodine
{"title":"Potentiality of Solanum torvum as an agent of feminization Anabas testudineus Bloch 1792: a Review","authors":"Ahmad Uzair Baihaqi, H. Handajani, Wanda Rahmania, H. Heryanto","doi":"10.20884/1.oa.2022.18.1.901","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.901","url":null,"abstract":"Climbing perch (Anabas testudineus) has a high economic value. Females grow faster than males. Sex reversal is one of genetic engineering by manipulating their hormone that is able to change the phenotype from male to female or vice versa. “Cepoka†eggplant (Solanum torvum) has been known as a medicinal and kitchen ingredient. Phytochemical test on S. torvum showed revealed that this plant contains tannins, saponins, flavonoids, steroids, alkaloids and terpenoids. Solasodine is a steroidial glycoalkaloid compound contained in S. torvum which has anti-fertility effects. Besides solasodine, the content of Gosipol in phenol compounds with BM 518.55 Dalton also has been known to be able to inhibit spermatogenesis by reducing the concentration, motility and viability of spermatozoa. The solasodine contained in S. torvum has the potential to be used for sex transfer in A. testudineus. Based on many studies, the utilize of solasodine from S. torvum could decrease the motility of spermatozoa. Even the results of the histological test on spermatogenesis, S. torvum gave a positive trend in inhibiting tilapia testicular cells in microscopic observation. Based on it, the chances of successful feminization of S. torvum utilizing cepoka eggplant are very high. A factor that must be considered in feminization is the age of the larvae, immersion dosige, immersion time and environment.Key Words : eggplant, Climbing perch, sex reversal, spermatozoa, solasodine","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67596673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-25DOI: 10.20884/1.oa.2022.18.1.921
Y. Ramili, H. Umasangaji
Research on the occurrence and the characteristics of microplastics (MPs) sedimentary in seagrass meadows at the area of Mare Island conservation is the very first study in this region. The objectives of this work is to determine the abundance and the characteristics of MPS and its diversity in the two villages namely Maregam and Marekofo at the Island. Samples are collected using sediment core, then dried and extracted using NaCl to separate the density. MPs were identified under a microscope after going through the filtering process. The abundance of MPs particles ranges from 17,000 - 37,000 particles. kg-1dry weight (dw) sediment at Station 1 (Maregam) and 13.839 - 30,666 particles.kg-1 dw sediment at Station 2 (Marekofo). In general, the average value of MPs abundance at station 1 higher than station 2 were 27.090 ± 13.908 particles.kg-1 dw of sediment and 18,368 ± 10,625 particles.kg-1 dw of sediment, respectively. Statistically there no significance difference of the MPs abundance between the two station Furthermore, the predominance of MPs types were fiber and fragments, while the majority of colors of particles were blue. While the results of the microplastic diversity test indicated that MPS particles at Mare Island were not too complex and were in unstable conditions. Even though the less density of the population at the island, MPs were quite high compared to other areas in the world. This finding is allegedly that those MPs were supplied from the distance which transmitted by hydro-oceanographic and meteorology factors, beyond of local contribution.Keywords: Microplastic, seagrass bed, sediment, conservation area, Mare Island
{"title":"An Assessment of Microplastics (MPs) Sedimentary Accumulation in Seagrass Meadows of Mare Island Conservation Area, North Maluku, Indonesia","authors":"Y. Ramili, H. Umasangaji","doi":"10.20884/1.oa.2022.18.1.921","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.921","url":null,"abstract":"Research on the occurrence and the characteristics of microplastics (MPs) sedimentary in seagrass meadows at the area of Mare Island conservation is the very first study in this region. The objectives of this work is to determine the abundance and the characteristics of MPS and its diversity in the two villages namely Maregam and Marekofo at the Island. Samples are collected using sediment core, then dried and extracted using NaCl to separate the density. MPs were identified under a microscope after going through the filtering process. The abundance of MPs particles ranges from 17,000 - 37,000 particles. kg-1dry weight (dw) sediment at Station 1 (Maregam) and 13.839 - 30,666 particles.kg-1 dw sediment at Station 2 (Marekofo). In general, the average value of MPs abundance at station 1 higher than station 2 were 27.090 ± 13.908 particles.kg-1 dw of sediment and 18,368 ± 10,625 particles.kg-1 dw of sediment, respectively. Statistically there no significance difference of the MPs abundance between the two station Furthermore, the predominance of MPs types were fiber and fragments, while the majority of colors of particles were blue. While the results of the microplastic diversity test indicated that MPS particles at Mare Island were not too complex and were in unstable conditions. Even though the less density of the population at the island, MPs were quite high compared to other areas in the world. This finding is allegedly that those MPs were supplied from the distance which transmitted by hydro-oceanographic and meteorology factors, beyond of local contribution.Keywords: Microplastic, seagrass bed, sediment, conservation area, Mare Island","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41575667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-16DOI: 10.20884/1.oa.2022.18.1.906
M. Safir, K. Mansyur, N. Serdiati, S. F. Mangitung, Fachri Ramadhan Tamrin
Crown of thorns star (Acanthaster planci) is one of the aquatic organisms that contains protein and amino acids similar to fish meal, and has not been used properly for feed ingredients. This research was conducted to examine A planci flour as a feed ingredient on the growth of tilapia. The research method was a completely randomized design, consisting of 4 treatments with doses of A planci flour, 7 %, 14 %, 21 % and 0 % (control), given three replications. The results showed growth (daily growth rate and biomass increase) of 3.84 %, 3.81 %, 4.00 %, and 4.21 % per day, and 61.00 g, 49.33 g, 54.33 g, and 52.67 g. This growth did not show any difference between treatments (P>0.05). Feed consumption ranged from 129.20 g – 132.24 g (P>0.05). Feed conversion ratio and survival rates ranged from 2.13 – 2.75 and 94.44 % - 100.00 % (P>0.05). A. planci flour can be used up to 21 % as a source of protein for feed ingredients in minimizing fish meal as feed ingredients.Â
{"title":"Growth and Survival Rate of Tilapia (Oreochromis niloticus) Given Acanthaster planci Based Feed","authors":"M. Safir, K. Mansyur, N. Serdiati, S. F. Mangitung, Fachri Ramadhan Tamrin","doi":"10.20884/1.oa.2022.18.1.906","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.906","url":null,"abstract":"Crown of thorns star (Acanthaster planci) is one of the aquatic organisms that contains protein and amino acids similar to fish meal, and has not been used properly for feed ingredients. This research was conducted to examine A planci flour as a feed ingredient on the growth of tilapia. The research method was a completely randomized design, consisting of 4 treatments with doses of A planci flour, 7 %, 14 %, 21 % and 0 % (control), given three replications. The results showed growth (daily growth rate and biomass increase) of 3.84 %, 3.81 %, 4.00 %, and 4.21 % per day, and 61.00 g, 49.33 g, 54.33 g, and 52.67 g. This growth did not show any difference between treatments (P>0.05). Feed consumption ranged from 129.20 g – 132.24 g (P>0.05). Feed conversion ratio and survival rates ranged from 2.13 – 2.75 and 94.44 % - 100.00 % (P>0.05). A. planci flour can be used up to 21 % as a source of protein for feed ingredients in minimizing fish meal as feed ingredients. ","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49098336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-10DOI: 10.20884/1.oa.2022.18.s1.986
H. Prasetia, F. Zulpikar, J. Renyaan, M. Safaat, A. H. I. Putri
The COVID-19 pandemic has impacted the seaweed industry and business. The export-import trade is the most severely impacted sector, mainly the raw material export of seaweed. The purpose of this study was to determine how smallholder farmers in West Nusa Tenggara, Indonesia, can survive under adverse conditions and maintain their businesses during a pandemic. The research was conducted through a combination of field surveys and in-depth interviews with respondents. Interviews were performed using a variety of instruments, including questionnaires and cameras. According to the study's findings, smallholder farmers are impacted by a decline in prices and demand. Smallholder farmers in West Nusa Tenggara, Indonesia, are attempting to adapt or adjust their operations to maintain profitability. Seaweed farmers make significant savings and cut their spending in the event of a pandemic. What is intriguing is that respondents did not reduce their spending on food. Instead, they prioritize reducing tertiary needs. Additionally, the same holder farmer borrows from collectors, borrows from the bank, and works side jobs. Thus, seaweed farmers are relatively unaffected by this pandemic and recover more quickly than other types of fishery businesses.Keywords: Covid 19, seaweed, smallholder farmer, Nusa Tenggara Barat
新冠肺炎疫情对海藻行业和企业造成了影响。进出口贸易是受影响最严重的行业，主要是海藻原料出口。这项研究的目的是确定印度尼西亚西努沙登加拉的小农户如何在不利条件下生存，并在疫情期间维持他们的业务。这项研究是通过实地调查和对受访者的深入访谈相结合的方式进行的。访谈使用了各种工具，包括问卷调查和摄像机。根据研究结果，小农户受到价格和需求下降的影响。印尼西努沙登加拉的小农户正试图调整或调整他们的经营，以保持盈利能力。海藻养殖户节省了大量开支，并在疫情发生时削减了开支。有趣的是，受访者并没有减少他们在食品上的支出。相反，他们优先考虑减少第三层次需求。此外，同一个持有者农民向收藏者借款，向银行借款，并从事副业。因此，海藻养殖户相对而言不受这一流行病的影响，而且比其他类型的渔业企业恢复得更快。关键词：新冠肺炎19，海藻，小农户，Nusa Tenggara Barat
{"title":"The Impact of Covid 19 on Seaweed Smallholder Farmers in Nusa Tenggara Barat, Indonesia","authors":"H. Prasetia, F. Zulpikar, J. Renyaan, M. Safaat, A. H. I. Putri","doi":"10.20884/1.oa.2022.18.s1.986","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.s1.986","url":null,"abstract":"The COVID-19 pandemic has impacted the seaweed industry and business. The export-import trade is the most severely impacted sector, mainly the raw material export of seaweed. The purpose of this study was to determine how smallholder farmers in West Nusa Tenggara, Indonesia, can survive under adverse conditions and maintain their businesses during a pandemic. The research was conducted through a combination of field surveys and in-depth interviews with respondents. Interviews were performed using a variety of instruments, including questionnaires and cameras. According to the study's findings, smallholder farmers are impacted by a decline in prices and demand. Smallholder farmers in West Nusa Tenggara, Indonesia, are attempting to adapt or adjust their operations to maintain profitability. Seaweed farmers make significant savings and cut their spending in the event of a pandemic. What is intriguing is that respondents did not reduce their spending on food. Instead, they prioritize reducing tertiary needs. Additionally, the same holder farmer borrows from collectors, borrows from the bank, and works side jobs. Thus, seaweed farmers are relatively unaffected by this pandemic and recover more quickly than other types of fishery businesses.Keywords: Covid 19, seaweed, smallholder farmer, Nusa Tenggara Barat","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48697874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-21DOI: 10.20884/1.oa.2022.18.1.893
A. Y. Yuliardi, S. Heltria, Kemal Taj, N. M. Natih
The waters of the Bangka Belitung islands are shallow waters that are affected by tides. The tides in these waters originate from the propagation of the Natuna and Java Seas, so they have unique characteristics. This study aims to analyze the amplitude and phase difference at 2 stations representing Bangka and Belitung Islands with the final output of LAT and HAT information as marine cadastral recommendations at Tanjung Pesona and Tanjung Tinggi stations and safe depths for ports in PPN Sungailiat and PPN Tanjung Pandan. . Tidal data for 1 year with time intervals of 1 hour in 2015 were used to extract the harmonic components to determine the type of tide and calculate the tidal level at each station. The results obtained are 19 harmonic components with a diurnal tide type. The water level at Tanjung Pesona is higher than the high Tanjung, which is described by tidal levels with HAT 2.64 and 1.72 m. Safe depth of harbor pond. In the LAT condition (lowest recess), the water level at Tanjung Pesona station is above the Sungailiat PPN pool's maximum depth; on the other hand, the Tanjung Pandan PPN LAT is 0.44 m below the maximum depth of the port pool.Key Word: Bangka Belitung, chart datum, LAT, HAT, tidal level
{"title":"The amplitudes and phases of tidal constituents from Harmonic Analysis at two stations in the Gaspar Strait of Bangka Belitung","authors":"A. Y. Yuliardi, S. Heltria, Kemal Taj, N. M. Natih","doi":"10.20884/1.oa.2022.18.1.893","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.1.893","url":null,"abstract":"The waters of the Bangka Belitung islands are shallow waters that are affected by tides. The tides in these waters originate from the propagation of the Natuna and Java Seas, so they have unique characteristics. This study aims to analyze the amplitude and phase difference at 2 stations representing Bangka and Belitung Islands with the final output of LAT and HAT information as marine cadastral recommendations at Tanjung Pesona and Tanjung Tinggi stations and safe depths for ports in PPN Sungailiat and PPN Tanjung Pandan. . Tidal data for 1 year with time intervals of 1 hour in 2015 were used to extract the harmonic components to determine the type of tide and calculate the tidal level at each station. The results obtained are 19 harmonic components with a diurnal tide type. The water level at Tanjung Pesona is higher than the high Tanjung, which is described by tidal levels with HAT 2.64 and 1.72 m. Safe depth of harbor pond. In the LAT condition (lowest recess), the water level at Tanjung Pesona station is above the Sungailiat PPN pool's maximum depth; on the other hand, the Tanjung Pandan PPN LAT is 0.44 m below the maximum depth of the port pool.Key Word: Bangka Belitung, chart datum, LAT, HAT, tidal level","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45675389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-18DOI: 10.20884/1.oa.2022.18.s1.984
L. Setijaningsih, I. Taufik, D. Puspaningsih
The culture of fish and vegetable plants in aquaponic ebb-tide system is based on the principle of zero-waste aquaculture. The purpose of this study is to see how effective the use of different vegetable plants in an aquaponic ebb-tide system for intensive culture. As much as 3000 catfish (Clarias sp.) were stocked per pond (measuring 4 x 2 m2), with individual lengths of 8-10 cm. A completely randomized design (CRD) with three treatments and three replications was used in this study. With 60 days of observation, the research treatments included a variety of vegetable plants: (A) water spinach, (B) caisin, and (C) no plants (control). Absolute weight gain and survival rate, water physico-chemistry parameters, Total N and Total P analyses on vegetable plants among the observation parameters. Treatment was found to have the highest average weight gain and survival rate (73.63 g and 87.41%, respectively). Water spinach biomass was 102 kg at the end of the study, whereas caisin biomass was 72.54 kg. Total N and Total P absorption percentages in water spinach were 38.72% and 54.43%, respectively, while 36.00% and 49.55% in caisin. The catfish condition factor showed correlation coefficients with fish weight R2 = 0.978, R2 = 0.956, and R2 = 0.357 and R2 = 0.892, R2 = 0.8215 and R2 = 0.369 for length in the water spinach, caisin, and control treatments, respectively. This study's analysis of water quality parameters indicated that the A treatment had the lowest levels of ammonia, nitrite, and nitrate when compared to the B and C treatments.Keywords: catfish, aquaponic ebb-tide, water spinach, caisin
鱼类和蔬菜在水培退潮系统中的养殖是基于零浪费水产养殖的原则。本研究的目的是观察在水培退潮系统中如何有效地使用不同的蔬菜进行强化培养。每个池塘放养多达3000条鲶鱼（Clarias sp.）（尺寸为4 x 2 m2），个体长度为8-10厘米。本研究采用了三次处理和三次重复的完全随机设计（CRD）。经过60天的观察，研究处理包括各种蔬菜植物：（a）空心菜、（B）菜心和（C）无植物（对照）。观察参数中包括绝对增重率和成活率、水分理化参数、植物总氮和总磷分析。发现治疗具有最高的平均体重增加和存活率（分别为73.63g和87.41%）。研究结束时，空心菜的生物量为102 kg，而caisin的生物量则为72.54 kg。空心菜对总氮和总磷的吸收率分别为38.72%和54.43%，而Caicin的吸收率为36.00%和49.55%。在空心菜、caisin和对照处理中，鲶鱼状况因子与鱼重R2=0.978、R2=0.956、R2=0.357和R2=0.892、R20.8215和R2=0.369分别具有相关系数。本研究对水质参数的分析表明，与B和C处理相比，A处理的氨、亚硝酸盐和硝酸盐含量最低。关键词：鲶鱼、养殖退潮、空心菜、菜心
{"title":"Effectiveness of Different Vegetable Plants on Intensive Culture of Catfish (Clarias sp.) using Aquaponic Ebb-tide System","authors":"L. Setijaningsih, I. Taufik, D. Puspaningsih","doi":"10.20884/1.oa.2022.18.s1.984","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.s1.984","url":null,"abstract":"The culture of fish and vegetable plants in aquaponic ebb-tide system is based on the principle of zero-waste aquaculture. The purpose of this study is to see how effective the use of different vegetable plants in an aquaponic ebb-tide system for intensive culture. As much as 3000 catfish (Clarias sp.) were stocked per pond (measuring 4 x 2 m2), with individual lengths of 8-10 cm. A completely randomized design (CRD) with three treatments and three replications was used in this study. With 60 days of observation, the research treatments included a variety of vegetable plants: (A) water spinach, (B) caisin, and (C) no plants (control). Absolute weight gain and survival rate, water physico-chemistry parameters, Total N and Total P analyses on vegetable plants among the observation parameters. Treatment was found to have the highest average weight gain and survival rate (73.63 g and 87.41%, respectively). Water spinach biomass was 102 kg at the end of the study, whereas caisin biomass was 72.54 kg. Total N and Total P absorption percentages in water spinach were 38.72% and 54.43%, respectively, while 36.00% and 49.55% in caisin. The catfish condition factor showed correlation coefficients with fish weight R2 = 0.978, R2 = 0.956, and R2 = 0.357 and R2 = 0.892, R2 = 0.8215 and R2 = 0.369 for length in the water spinach, caisin, and control treatments, respectively. This study's analysis of water quality parameters indicated that the A treatment had the lowest levels of ammonia, nitrite, and nitrate when compared to the B and C treatments.Keywords: catfish, aquaponic ebb-tide, water spinach, caisin","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49144568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-18DOI: 10.20884/1.oa.2022.18.s1.976
Rizky Ade Candra, Sesilia Rani Samudra, Nuning Vita Hidayati
Banjaran River is a river that is widely used by local people for their daily needs, including for bathing, drinking water, washing, and irrigation of agricultural land. These activities will cause changes in the quality of the waters of the Banjaran River so that it will cause water pollution, especially pollution from organic materials. This pollution will cause changes in the structure of the biota community, one of which is the phytoplankton in the Banjaran River. Phytoplankton are organisms that play a role in providing nutrients and maintaining the balance of aquatic ecosystems. The purpose of this study was to determine the structure of the phytoplankton community in the Banjaran River, Banyumas Regency. The method used in this research is purposive sampling, with 4 sampling points and 3 repetitions. Sampling was carried out in April-May 2021 with an interval of 2 weeks. Data analysis in this study includes the calculation of abundance, diversity index, and phytoplankton dominance index. The results showed that the abundance of phytoplankton in the Banjaran River was 453-720 individuals.L-1, the diversity index was 1.97-2.25, and the dominance index was 0.13-0.18. These results indicate that the structure of the phytoplankton community in the Banjaran River is in moderate diversity and there is no particular species that dominates in these rivers.Keywords: Phytoplankton, Banjaran River, Aquatic Ecosystem.
{"title":"Phytoplankton Community Structure in Banjaran River, Banyumas Regency","authors":"Rizky Ade Candra, Sesilia Rani Samudra, Nuning Vita Hidayati","doi":"10.20884/1.oa.2022.18.s1.976","DOIUrl":"https://doi.org/10.20884/1.oa.2022.18.s1.976","url":null,"abstract":"Banjaran River is a river that is widely used by local people for their daily needs, including for bathing, drinking water, washing, and irrigation of agricultural land. These activities will cause changes in the quality of the waters of the Banjaran River so that it will cause water pollution, especially pollution from organic materials. This pollution will cause changes in the structure of the biota community, one of which is the phytoplankton in the Banjaran River. Phytoplankton are organisms that play a role in providing nutrients and maintaining the balance of aquatic ecosystems. The purpose of this study was to determine the structure of the phytoplankton community in the Banjaran River, Banyumas Regency. The method used in this research is purposive sampling, with 4 sampling points and 3 repetitions. Sampling was carried out in April-May 2021 with an interval of 2 weeks. Data analysis in this study includes the calculation of abundance, diversity index, and phytoplankton dominance index. The results showed that the abundance of phytoplankton in the Banjaran River was 453-720 individuals.L-1, the diversity index was 1.97-2.25, and the dominance index was 0.13-0.18. These results indicate that the structure of the phytoplankton community in the Banjaran River is in moderate diversity and there is no particular species that dominates in these rivers.Keywords: Phytoplankton, Banjaran River, Aquatic Ecosystem.","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41892372","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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