OmniAkuatika最新文献_第5页

Validation of INDO12 Ocean Model at Makassar Strait INDO12海洋模型在望加锡海峡的验证

OmniAkuatika Pub Date : 2020-12-31 DOI: 10.20884/1.OA.2020.16.2.663

B. Priyono, M. Trenggono, T. Agustiadi

{"title":"Validation of INDO12 Ocean Model at Makassar Strait","authors":"B. Priyono, M. Trenggono, T. Agustiadi","doi":"10.20884/1.OA.2020.16.2.663","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.2.663","url":null,"abstract":"INDO12, a 1/12 regional configuration of the NEMO3.1 physical ocean model covering the whole Indonesian EEZ has been developed and was running with 3D daily and 2D surface hourly outputs in the framework of the INDESO project. Validate the model results highly required for any downstream applications (services or scientific studies). In order to enhance confidence in using the INDO12 model outputs in Makassar Strait, qualitative comparisons with observed variables is performed. The datasets were used in this study provided by the INSTANT and MITF programs. Validation of model outputs was performed by compare the value of variables from simulation with observation results.The method of comparisons was conducted as follows:current velocities, temperature and salinity, volume transport. The volume transports differences especially occurred below the thermocline layer. The model was colder and fresher in the thermocline layer, whereas deeper the model was warmer and saltier.The differences of the volume transport and temperature distribution affected the transport-weighted temperature and 16°C isotherm depth. The model produced warmer transport-weighted temperature and deeper 16°C isotherm depth compared to the observations. It is concluded from the validation results that the model give a fairly good comparison with the in-situ data, especially for seasonally signals.Keywords: Validation, INDO12, Ocean Model, Makassar Strait, INSTANT and MITF Programe","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42272361","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}

引用次数: 1

Masculinization of Banggai Cardinalfish (Pterapogon kauderni) using 17α-Methyltestosterone-enriched Artemia sp. 富17α-甲基睾酮的蒿属植物对邦盖红雀的雄性化作用。

OmniAkuatika Pub Date : 2020-12-31 DOI: 10.20884/1.OA.2020.16.2.809

M. Safir, D. Tobigo, S. F. Mangitung, Madinawati Madinawati, Z. Zainab

{"title":"Masculinization of Banggai Cardinalfish (Pterapogon kauderni) using 17α-Methyltestosterone-enriched Artemia sp.","authors":"M. Safir, D. Tobigo, S. F. Mangitung, Madinawati Madinawati, Z. Zainab","doi":"10.20884/1.OA.2020.16.2.809","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.2.809","url":null,"abstract":"Banggai Cardinalfish (Pterapogon kauderni) is one of the endemic fish from the waters of the Banggai Islands, Central Sulawesi Province. One factor challenging the production of P. kauderni larvae is the male fish will nurture the eggs and larvae for 30 days, hindering next spawning cycle. One effort to overcome this problem an increase of male fish number should be performed, for example through sex reversal. This study aimed to determine the effectiveness of the hormone 17α-methyltestosterone (17α-MT) through Artemia sp. to increase male sex percentage P. kauderni. This study used a completely randomized design by testing four treatments namely feeding Artemia sp. which has been soaked with 2.0 mg of the 17α-MT hormone for two- hours given to P. kauderni larvae for 10 days (A); 20 days (B); 30 days (C), and without hormone treatment 17α-MT (control). Each treatment included control was performed in triplicates. The percentage of male sex was 93.33 % at 30 days treatment and was higher (P<0.05) compared to controls (53.3 %). Additionally, the results showed that daily growth rate, biomass gain and survival rate of all treatments were not significantly different (P>0.05) with those of control. In conclusion, Artemia sp. contained 17α-methyltestosterone enhanced male percentage of P. kaurderni. Keywords: growth, male percentage, Artemia sp., survival rate, Pterapogon kauderni","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44521431","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}

引用次数: 5

Shoreline Change Analysis of Pontang Cape of Serang Regency of Banten Province 万丹省色朗县蓬塘岬海岸线变化分析

OmniAkuatika Pub Date : 2020-12-31 DOI: 10.20884/1.OA.2020.16.2.800

Abdurrahman Al Farrizi, A. Taofiqurohman, S. Subiyanto

{"title":"Shoreline Change Analysis of Pontang Cape of Serang Regency of Banten Province","authors":"Abdurrahman Al Farrizi, A. Taofiqurohman, S. Subiyanto","doi":"10.20884/1.OA.2020.16.2.800","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.2.800","url":null,"abstract":"Coastal areas, being vulnerable to environmental problems, have one of the most frequent problems which are the change in the shorelines. Shoreline changes, namely abrasions, can cause problems such as land degradations or loss of land in a coastal zone. This problem occurs in many areas, one of which is Pontang Cape. This study aims to determine the distance and rate of shoreline changes that occured in the Cape and its surroundings, as well as explaining the analysis points based on similar studies that had been conducted. This research used ArcMap software and Digital Shoreline Analysis System (DSAS) toolset to determine the distance and rate of shoreline changes for 19 years (1999-2018). Based on the results, there were two shoreline segments where different phenomena of shoreline change took place, namely Banten Bay (accretion) and Pontang Cape-Lontar (abrasion). The most likely causes of changes in the shorelines are sediment runoffs from rivers that lead to bay and sediment transports that affect Banten Bay accretions, while sea sand mining and conversions of mangrove swamps into fishery ponds are factors affecting abrasions in Pontang Cape.Keywords: Abrasion, Accretion, Pontang Cape, Banten Bay, DSAS","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45540576","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}

引用次数: 0

Investment Feasibility of Ecotourism Development in Small Island 小岛屿生态旅游开发的投资可行性

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.855

Agus Romadhon, S. Suhartono, Dyah Ayu Sulistyo Rini

引用次数: 1

Organic Feed Enrichment Effects toward Growth Performance and Egg Production of Oithona similis 有机饲料富集对水松生长性能和产蛋量的影响

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.852

D. Chilmawati, J. Hutabarat, S. Anggoro, Suminto Suminto

{"title":"Organic Feed Enrichment Effects toward Growth Performance and Egg Production of Oithona similis","authors":"D. Chilmawati, J. Hutabarat, S. Anggoro, Suminto Suminto","doi":"10.20884/1.OA.2020.16.3.852","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.3.852","url":null,"abstract":"The optimum condition of culture media and feed diets which fit the necessities of Oithona similis life (ecophysiological) is very important for it to grow and develop in its maximum. The enrichment of O. similis feed can be done by adding fermented organic feed. Providing organic feed with optimum protein content is necessary to support the growth process and reproduction of O. similis. Osmoregulation process of water organism which is influenced by media salinity is related to bioenergetics process as the effort to use feed energy for the growth. This research aimed to examine the effect of different organic feed protein content and to determine the optimum point which may result in the best growth and egg production of O. similis in the optimum condition of culture media. The study used an experimental method with a completely random design consisting of 4 treatments and 4 repetitions each, i.e. O. similis culture with A. 25%; B. 30%; C. 35%; and D. 40% organic feed protein content. The results showed that the difference of protein content in organic feed affects the growth and production of O. similis eggs. The optimum point of protein content in the fermented organic feed is on protein content B, i.e. 30%, which resulted in the best growth performance (70.44 ± 0.43 ind.mL-1 total density, 0.213 ± 0.001.day-1 population growth rate, and 27.38 ± 0.48 eggs.ind-1 egg production. (ttujuan dan pembahasan harus past tense), Tujuan di abstrak minimal harus menggambarkan atau sama denga tujuan di pendahuluan)Keywords: enrichment, Oithona similis, organic feed, protein, reproduction","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42741190","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}

引用次数: 1

Fishers’ resilience towards extreme weather conditions in the South China Sea: A case study of Natuna Islands, Indonesia 渔民对南海极端天气条件的适应能力：以印度尼西亚纳土纳群岛为例

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.856

R. Hafsaridewi, H. Hikmah, A. Zulham, P. A. Soejarwo, B. V. I. Yanti

{"title":"Fishers’ resilience towards extreme weather conditions in the South China Sea: A case study of Natuna Islands, Indonesia","authors":"R. Hafsaridewi, H. Hikmah, A. Zulham, P. A. Soejarwo, B. V. I. Yanti","doi":"10.20884/1.OA.2020.16.3.856","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.3.856","url":null,"abstract":"Factors influencing fishers’ lives are climate change and extreme change in local weather. Climate change and extreme weather conditions are expected to affect marine fisheries’ productivity and modify fish distribution because of changes in water temperature, ocean currents, and other oceanic conditions. Both are issues faced by fishers in Natuna. The purpose of this study was to identify climate and weather changes in the research location, investigate the socio-economic effects, and analyse fishers’ adaptability patterns in relation to climate change. The method used in this study includes surveys, questionnaires, in-depth interviews, and focus group discussions. The results reveal climate change, and extreme weather affects the socio-economic dynamics of fishers in the Natuna Islands. The socio-economic dynamics as fishers’ resilience towards extreme climate are done by adjusting the number of workers and workforce, adjusting the size of fishing boats/ships, adjusting the composition of fishing gears, and changing fishing grounds. Keywords: Resilience, fishermen, climate change, Natuna, South China Sea","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49366305","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}

引用次数: 0

The Size and The Shape of Sagittal Otolith of Redtail Scad, Decapterus kurroides Blekeer 1855 from Kema Bay, North Minahasa Regency, North Sulawesi, Indonesia 印度尼西亚北苏拉威西省北米纳哈萨县凯马湾1855年红尾Scad，Decapterus kurroides Blekeer的矢状耳石的大小和形状

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.861

Fransine B. Manginsela, Gybert E. Mamuaya, R. Rompas, L. Lumingas

{"title":"The Size and The Shape of Sagittal Otolith of Redtail Scad, Decapterus kurroides Blekeer 1855 from Kema Bay, North Minahasa Regency, North Sulawesi, Indonesia","authors":"Fransine B. Manginsela, Gybert E. Mamuaya, R. Rompas, L. Lumingas","doi":"10.20884/1.OA.2020.16.3.861","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.3.861","url":null,"abstract":"This study aimed to examine the difference in the otolith size and otolith shape of redtail scad Decapterus kurrodes between sex in North Sulawesi. The otoliths of D. kurroides were studied for sagitta otolith pair samples of 34 juveniles, 58 females and 75 males from Kema Bay. These pairs sagitta otolith images were interpreted using ImageJ tool to describe the otolith size (length, width, perimeter, and area), then we calculated the shape index (form factor, roundness, circularity, rectangularity, ellipticity and aspect ratio or length-width ratio). No significant difference was found in otolith length between left and right otoliths of juveniles of D. kurroides or called symmetrical but significant differences or asymmetrical were found in all sample, females and males. The regressions of total length against otolith sizes (otolith lengt, otolith width otolith perimeter and otolith area of D. kurroides follow a power function. The growth patterns showed dominant allometric growth in total length–otolith sizes relationships of D. kurroides from Kema Bay, Key Words: size, shape index, otolith, Decapterus kurroides, Kema Bay.","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43494845","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}

引用次数: 2

The Correlation Between Plankton Abundance And Water Quality in Donan River 多南河浮游生物丰度与水质的相关性研究

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.844

Nuraina Andriyani, A. Mahdiana, E. Hilmi, Samuel Kristian

引用次数: 3

The Fishing Ground of Bottom Longline Vessels and Exploitation Rate of Tiger Grouper (Epinephelus aerolatus) in Arafura Waters 阿拉福拉海域底层延绳渔船渔场及虎斑鱼的开发利用率

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.850

A. Pane, R. Alnanda, Prihatiningsih Prihatiningsih, Hufiadi Hufiadi, A. Suman

{"title":"The Fishing Ground of Bottom Longline Vessels and Exploitation Rate of Tiger Grouper (Epinephelus aerolatus) in Arafura Waters","authors":"A. Pane, R. Alnanda, Prihatiningsih Prihatiningsih, Hufiadi Hufiadi, A. Suman","doi":"10.20884/1.OA.2020.16.3.850","DOIUrl":"https://doi.org/10.20884/1.OA.2020.16.3.850","url":null,"abstract":"As excessive capture activity adversely impacts fisheries sector, fish resources management is a necessity. This study was conducted as a scientific contribution for the managements of bottom longline fisheries in Arafura Waters and areolate grouper (Epinephelus areolatus) as one of the target catches. It was carried out from February to December 2017 and in November 2018. Data on the fishing grounds of eight bottom longline vessels were obtained from the vessel monitoring system (VMS) of Probolinggo Marine and Fisheries Resources Supervisory Unit, Mayangan Probolinggo Fishing Port, and Marine and Fisheries Resources Surveillance (PSDKP) Tual Station. Based on the analysis of the coordinates from the VMS, the fishing grounds of the bottom longline vessels in Arafura waters were found around Dolak until the border with Merauke and around Timika until Aru Islands. The composition of dominant catches consisted of croaker (Pennahia spp.) and snapper (Lutjanus spp.), as well as grouper (Epinephelus spp.) in a smaller proportion. The size structure of the areolate grouper caught with bottom longlines was 21.5–54.5 cmTL; its length at first capture (Lc) was 33.9 cmTL; and its asymptotic length was 70.5 cmTL. Its growth rate (K) was found 0.26 per year. The fishing mortality (F) of the species was found higher than its natural mortality (M), and its exploitation level (E) was 0.74, meaning that the species was already overfished. The exploitation should be reduced by 40–50% to keep the fish resources in Arafura sustainable, especially for areolate grouper. Keywords: fishing ground, bottom longline, exploitation level, tiger grouper, Arafura ","PeriodicalId":31102,"journal":{"name":"OmniAkuatika","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49522554","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}

引用次数: 1

The Prediction of Plankton Diversity and Abundance in Mangrove Ecosystem 红树林生态系统浮游生物多样性和丰度的预测

OmniAkuatika Pub Date : 2020-12-30 DOI: 10.20884/1.OA.2020.16.3.843

E. Hilmi, L. K. Sari, A. Amron

引用次数: 5