Dokumen ini membahas pengelolaan pascapanen dan pemanfaatan Artemia lokal. Dokumen menjelaskan tentang cara pengolahan Artemia dewasa menjadi blok beku untuk pakan udang dan ikan hias, serta manfaat Artemia sebagai pakan alami dan sumber protein.
Kajian menunjukkan bahwa pemberian artemia dewasa kepada ikan hias clownfish dapat meningkatkan frekuensi pemijahan menjadi 4 kali per bulan dibandingkan dengan pemberian udang dan cacing yang hanya 2-3 kali per bulan. Jumlah larva yang dihasilkan juga lebih banyak dan stabil, berkisar antara 508-697 ekor per kali pemijahan.
Factibilidad de cultivo de tres cepas de artemia (artemia salina) en sistemas...emadagp
El documento presenta un estudio realizado por un grupo de estudiantes sobre la factibilidad del cultivo de tres cepas de Artemia salina en sistemas de aprovechamiento de sal por evaporación solar. El estudio buscó determinar cual de las tres cepas (Artemia Permísilis, Artemia Franciscana y Artemia Mónica) presenta mayor tamaño y sobrevivencia. Las tres cepas fueron cultivadas adecuadamente y se les aplicaron análisis para evaluar su rendimiento. Como resultado, las tres cepas obtuvieron buenos resultados pero
Water pollution is a major problem in Indonesia, impacting rivers, lakes, and seas. The main causes are human activities like domestic and industrial waste, as well as deforestation and erosion. Two case studies of highly polluted rivers are the Citarum River in West Java and Siak River in Riau Province. Eutrophication from excess nutrients is a significant issue for reservoirs on the Citarum River. Other cases of severe pollution have occurred in Southeast Asian seas and the Timor Sea in Indonesia from oil spills. While laws and regulations exist, enforcement remains a challenge, and polluters often face few consequences.
Impact of aquaculture activity on phytoplankton diversity in djuanda reservoi...Fiddy Prasetiya
[Ringkasan]
Dokumen tersebut membahas hubungan antara tingkat kepadatan karamba jaring apung (KJA) dengan struktur komunitas fitoplankton di Waduk Ir. H. Djuanda, Jawa Barat. Parameter yang diamati meliputi kelimpahan, indeks diversitas, dominansi serta komposisi fitoplankton. Hasilnya menunjukkan dominansi fitoplankton Cyanophyceae terutama Microcystis pada lokasi dengan kepadatan KJA tinggi.
This study investigated the harpacticoid copepod communities associated with degradation zones of the deep-sea coral Lophelia pertusa. Over 800 harpacticoid specimens were collected from coral, sediment, and sponge samples, representing 157 species. Diversity did not significantly differ between microhabitats. The majority of diversity was attributed to differences between sampling sites. While community structures were defined for coral and sediment samples, similarity was low within samples. Certain taxa like Pseudotachidiidae were more common on sponges. Overall trends in harpacticoid composition and diversity in the coral degradation zone were difficult to assess conclusively.
This document discusses using remote sensing to monitor seagrass ecosystems. Seagrass provides important coastal ecosystem functions but faces threats from natural disasters and human activities. Remote sensing allows monitoring of large areas in a cost-effective manner, though resolution and water conditions can pose difficulties. The document analyzes Landsat satellite imagery from 1988-2003 to detect changes in seagrass cover in Wallis Lake and Chwaka Bay in Australia, finding both losses and gains. While remote sensing shows potential for seagrass monitoring, challenges remain in species discrimination, sensor resolution, and accounting for water quality.
This document presents toxicity data for several metal species and chemicals using different species groups. It provides no-observed-effect concentration (NOEC) and lethal concentration 50% (LC50) toxicity values for copper, cadmium, and chlordane using algae, crustaceans, and fish species. It then calculates risk quotients (RQs) by dividing predicted environmental concentrations (PECs) by predicted no-effect concentrations (PNECs), finding that cadmium has the highest RQ and potential risk of the three chemicals analyzed.
This document discusses toxicity testing of chemicals in marine environments. It defines aquatic toxicity, degradability, and bioaccumulation as key properties to assess the potential hazards of chemicals. The goal of toxicity tests is to determine the concentration of a chemical that causes unacceptable negative effects. Toxicity data from species in three trophic levels (algae, invertebrates, fish) is used to calculate the predicted no-effect concentration (PNEC). The document outlines how to determine toxicity through dose-response relationships and endpoints like median lethal concentrations and no observed effect concentrations.
Kajian menunjukkan bahwa pemberian artemia dewasa kepada ikan hias clownfish dapat meningkatkan frekuensi pemijahan menjadi 4 kali per bulan dibandingkan dengan pemberian udang dan cacing yang hanya 2-3 kali per bulan. Jumlah larva yang dihasilkan juga lebih banyak dan stabil, berkisar antara 508-697 ekor per kali pemijahan.
Factibilidad de cultivo de tres cepas de artemia (artemia salina) en sistemas...emadagp
El documento presenta un estudio realizado por un grupo de estudiantes sobre la factibilidad del cultivo de tres cepas de Artemia salina en sistemas de aprovechamiento de sal por evaporación solar. El estudio buscó determinar cual de las tres cepas (Artemia Permísilis, Artemia Franciscana y Artemia Mónica) presenta mayor tamaño y sobrevivencia. Las tres cepas fueron cultivadas adecuadamente y se les aplicaron análisis para evaluar su rendimiento. Como resultado, las tres cepas obtuvieron buenos resultados pero
Water pollution is a major problem in Indonesia, impacting rivers, lakes, and seas. The main causes are human activities like domestic and industrial waste, as well as deforestation and erosion. Two case studies of highly polluted rivers are the Citarum River in West Java and Siak River in Riau Province. Eutrophication from excess nutrients is a significant issue for reservoirs on the Citarum River. Other cases of severe pollution have occurred in Southeast Asian seas and the Timor Sea in Indonesia from oil spills. While laws and regulations exist, enforcement remains a challenge, and polluters often face few consequences.
Impact of aquaculture activity on phytoplankton diversity in djuanda reservoi...Fiddy Prasetiya
[Ringkasan]
Dokumen tersebut membahas hubungan antara tingkat kepadatan karamba jaring apung (KJA) dengan struktur komunitas fitoplankton di Waduk Ir. H. Djuanda, Jawa Barat. Parameter yang diamati meliputi kelimpahan, indeks diversitas, dominansi serta komposisi fitoplankton. Hasilnya menunjukkan dominansi fitoplankton Cyanophyceae terutama Microcystis pada lokasi dengan kepadatan KJA tinggi.
This study investigated the harpacticoid copepod communities associated with degradation zones of the deep-sea coral Lophelia pertusa. Over 800 harpacticoid specimens were collected from coral, sediment, and sponge samples, representing 157 species. Diversity did not significantly differ between microhabitats. The majority of diversity was attributed to differences between sampling sites. While community structures were defined for coral and sediment samples, similarity was low within samples. Certain taxa like Pseudotachidiidae were more common on sponges. Overall trends in harpacticoid composition and diversity in the coral degradation zone were difficult to assess conclusively.
This document discusses using remote sensing to monitor seagrass ecosystems. Seagrass provides important coastal ecosystem functions but faces threats from natural disasters and human activities. Remote sensing allows monitoring of large areas in a cost-effective manner, though resolution and water conditions can pose difficulties. The document analyzes Landsat satellite imagery from 1988-2003 to detect changes in seagrass cover in Wallis Lake and Chwaka Bay in Australia, finding both losses and gains. While remote sensing shows potential for seagrass monitoring, challenges remain in species discrimination, sensor resolution, and accounting for water quality.
This document presents toxicity data for several metal species and chemicals using different species groups. It provides no-observed-effect concentration (NOEC) and lethal concentration 50% (LC50) toxicity values for copper, cadmium, and chlordane using algae, crustaceans, and fish species. It then calculates risk quotients (RQs) by dividing predicted environmental concentrations (PECs) by predicted no-effect concentrations (PNECs), finding that cadmium has the highest RQ and potential risk of the three chemicals analyzed.
This document discusses toxicity testing of chemicals in marine environments. It defines aquatic toxicity, degradability, and bioaccumulation as key properties to assess the potential hazards of chemicals. The goal of toxicity tests is to determine the concentration of a chemical that causes unacceptable negative effects. Toxicity data from species in three trophic levels (algae, invertebrates, fish) is used to calculate the predicted no-effect concentration (PNEC). The document outlines how to determine toxicity through dose-response relationships and endpoints like median lethal concentrations and no observed effect concentrations.
This document provides an overview of environmental risk assessment (ERA) of chemical pollutants. ERA determines or predicts the negative impact of chemicals on the aquatic environment. It involves estimating the predicted environmental concentration (PEC) of chemicals and comparing it to the predicted no effect concentration (PNEC) to calculate the risk quotient. PEC is estimated through exposure assessment, while PNEC is derived through effects assessment using toxicity data from multiple species. The European Union System for Evaluation of Substances (EUSES) is a tool that can be used to conduct a comprehensive ERA.
Relational databases allow data to be stored and linked across multiple tables. This structured format makes the data more organized, avoids duplications, and enables complex queries across different aspects of the data. The key components are tables with unique identifiers, relationships between tables established through common fields, and queries to extract specific data combinations. Proper database design upfront is important to ensure the tables and relationships accurately capture and connect all the relevant entities and attributes in the study.
Data formats can vary greatly, from handwritten text to complex electronic formats. There are many reasons for using different formats, including historical reasons, the data generator, and formats agreed upon for certain data types. Common formats include ASCII, binary, spreadsheets, relational databases, images, maps, and more. Proper documentation of file contents and structure is important for understanding and using data in different formats.
- Historically, scientific data was often hidden or only accessible to paying subscribers of journals. This began to change in the 1950s with the science citation index and in the early 2000s with declarations supporting open access to data.
- When developing data policies, it is important to consider questions of data ownership, access, use restrictions, revision timelines, and how the data may be used. Effective policies clarify these aspects and can encourage data sharing by outlining benefits like requiring data originators be co-authors on publications using the data.
The document provides an introduction to working with databases in Microsoft Access. It discusses how data mining requires data to be stored in a database format. Relational databases store all data and metadata together with links between tables, making the data easier to retrieve, back up, and query. The document demonstrates how to design database tables with different field types, set relationships between tables, and construct basic queries to select and filter data across multiple tables.
This document discusses principles and best practices for data management. It covers a variety of data formats, from simple text files to more complex relational databases and geospatial images. Common file formats are described, along with their advantages and disadvantages for different types of data. Considerations for data access, preservation, and sharing are also presented. The goal is to help ensure data is organized, documented, and stored using standard practices to facilitate future use and analysis.
Weekly samples of phytoplankton and water were taken from four stations around Djuanda reservoir with different levels of fish cage aquaculture (FCA) density. Phytoplankton abundance was analyzed along with diversity and similarity indices. There was a positive correlation between FCA density and phytoplankton abundance but higher FCA density decreased diversity. Four classes of phytoplankton from 18 genera were identified with Cyanophyceae being the most abundant. Microcystis sp. had the highest individual abundance and station IV the overall highest phytoplankton levels. A negative correlation was found between FCA density and diversity indices. Further study of FCA carrying capacity is needed to ensure sustainable
Water quality degradation & cyanobacterial bloomsFiddy Prasetiya
This study analyzed water samples from 18 lakes and ponds in Hanoi, Vietnam to assess water quality degradation and cyanobacterial blooms. High concentrations of phosphorus and nitrogen indicated hypertrophic conditions. Cyanobacterial biovolumes exceeded thresholds for safe drinking water. Nutrient levels, pH, temperature, and dissolved oxygen correlated with increased cyanobacterial growth. All water bodies showed moderate to high probability of adverse health effects from cyanobacteria. The study recommends comprehensive monitoring and pilot restoration projects to improve water quality and reduce cyanobacterial blooms in Hanoi.
Sea bird mortality at cabo san luca: presentation_fiddyFiddy Prasetiya
The document summarizes evidence that toxic diatom blooms responsible for sea bird mortality are spreading. Researchers analyzed stomach contents of pelicans and mackerel that died at Cabo San Lucas, Mexico, finding structures resembling the diatom Pseudonitzschia. Extracts from pelican viscera injected in mice showed low levels of the toxin domoic acid, causing diarrhea, convulsions and death. The study identifies Pseudonitzschia blooms as the source of bird toxicity from domoic acid, and recommends monitoring programs to detect future harmful algal blooms.
Primary production in Spuikom lagoon, BelgiumFiddy Prasetiya
This document presents a study that measured primary production in the Spuikom lagoon at different water depths. The objectives were to see if primary production differed between surface and bottom water and how it changed over time. Samples were taken from the surface and bottom at different times and oxygen levels were measured using Winkler titration to calculate net primary production, respiration, and gross primary production. Preliminary results showed slight increases in oxygen and net primary production over time but no clear differences between surface and bottom. More data is needed to fully evaluate the hypothesis.
This study analyzed the concentrations of heavy metals (Cu, Cr, Ni, Zn, Fe, Mn) and radioactive cesium (137Cs) in mussels (Mytilus galloprovincialis) collected from Thermaikos Gulf in Greece between April and October 2000. The metals levels were generally low and similar to unpolluted areas. Two temporal patterns were observed: cesium, nickel, and iron had minimum levels in spring and autumn, while copper, zinc, and manganese-chromium had maximum levels during those seasons. Overall, the results indicate low pollution levels in the gulf and validate the use of mussels as effective bioindicators of metal contamination in the marine ecosystem.
This document summarizes a study on changes in benthic fauna in the inner part of Ariake Bay between 1989 and 2006. The mean number of species, abundances, and biomass of macrobenthos declined significantly over this period. Benthic communities shifted from large, long-lived species to smaller, short-lived species, indicating long-term organic pollution. Distribution of dominant bivalve species also changed. The deterioration of the benthic ecosystem is likely due to increased hypoxia, sediment changes, and pollution stressors in the bay. Continued monitoring is needed to inform management decisions for restoring marine ecosystems and benthic habitats in Ariake Bay.
Allelopatic haslea ostrearia on different species of diatomsFiddy Prasetiya
1) The study examines the potential prophylactic effect of using the diatom Haslea ostrearia as feed for oysters by determining its allelopathic effects on other diatom species.
2) The methodology involves culturing H. ostrearia with other diatom species and measuring their growth rates and biovolumes over time under a microscope. Marennine concentration is also measured in each culture using HPLC analysis.
3) The results show reductions in growth rates and biovolumes of other diatom species when cultured with H. ostrearia, indicating allelopathic effects of marennine. This suggests H. ostrearia may have potential prophylactic effects for oysters.
The document consists of a long list of unintelligible symbols. As there is no meaningful information that can be understood or summarized from the document, it is not possible to provide a useful summary in 3 sentences or less.
2 kriteria plb3 agro & hasil 01 juni 2011 hh ok.pptFiddy Prasetiya
Bimbingan teknis tersebut membahas pengelolaan limbah berbahaya dan beracun (limbah B3) di sektor agroindustri, mencakup aspek-aspek peraturan, pengelolaan limbah B3, penggunaan pihak ketiga, dan pengujian mutu.
Dokumen tersebut membahas berbagai klasifikasi xenobiotik (bahan asing bagi tubuh) berdasarkan sumber, wujud, sifat kimia-fisika, proses terbentuknya, efek kesehatan, organ target, dan status hidup/matinya. Jenis xenobiotik yang dijelaskan meliputi racun alami, mikroba, tanaman, dan jamur yang dapat menyebabkan berbagai penyakit seperti kolera, botulisme, dan kanker.
This document provides an overview of environmental risk assessment (ERA) of chemical pollutants. ERA determines or predicts the negative impact of chemicals on the aquatic environment. It involves estimating the predicted environmental concentration (PEC) of chemicals and comparing it to the predicted no effect concentration (PNEC) to calculate the risk quotient. PEC is estimated through exposure assessment, while PNEC is derived through effects assessment using toxicity data from multiple species. The European Union System for Evaluation of Substances (EUSES) is a tool that can be used to conduct a comprehensive ERA.
Relational databases allow data to be stored and linked across multiple tables. This structured format makes the data more organized, avoids duplications, and enables complex queries across different aspects of the data. The key components are tables with unique identifiers, relationships between tables established through common fields, and queries to extract specific data combinations. Proper database design upfront is important to ensure the tables and relationships accurately capture and connect all the relevant entities and attributes in the study.
Data formats can vary greatly, from handwritten text to complex electronic formats. There are many reasons for using different formats, including historical reasons, the data generator, and formats agreed upon for certain data types. Common formats include ASCII, binary, spreadsheets, relational databases, images, maps, and more. Proper documentation of file contents and structure is important for understanding and using data in different formats.
- Historically, scientific data was often hidden or only accessible to paying subscribers of journals. This began to change in the 1950s with the science citation index and in the early 2000s with declarations supporting open access to data.
- When developing data policies, it is important to consider questions of data ownership, access, use restrictions, revision timelines, and how the data may be used. Effective policies clarify these aspects and can encourage data sharing by outlining benefits like requiring data originators be co-authors on publications using the data.
The document provides an introduction to working with databases in Microsoft Access. It discusses how data mining requires data to be stored in a database format. Relational databases store all data and metadata together with links between tables, making the data easier to retrieve, back up, and query. The document demonstrates how to design database tables with different field types, set relationships between tables, and construct basic queries to select and filter data across multiple tables.
This document discusses principles and best practices for data management. It covers a variety of data formats, from simple text files to more complex relational databases and geospatial images. Common file formats are described, along with their advantages and disadvantages for different types of data. Considerations for data access, preservation, and sharing are also presented. The goal is to help ensure data is organized, documented, and stored using standard practices to facilitate future use and analysis.
Weekly samples of phytoplankton and water were taken from four stations around Djuanda reservoir with different levels of fish cage aquaculture (FCA) density. Phytoplankton abundance was analyzed along with diversity and similarity indices. There was a positive correlation between FCA density and phytoplankton abundance but higher FCA density decreased diversity. Four classes of phytoplankton from 18 genera were identified with Cyanophyceae being the most abundant. Microcystis sp. had the highest individual abundance and station IV the overall highest phytoplankton levels. A negative correlation was found between FCA density and diversity indices. Further study of FCA carrying capacity is needed to ensure sustainable
Water quality degradation & cyanobacterial bloomsFiddy Prasetiya
This study analyzed water samples from 18 lakes and ponds in Hanoi, Vietnam to assess water quality degradation and cyanobacterial blooms. High concentrations of phosphorus and nitrogen indicated hypertrophic conditions. Cyanobacterial biovolumes exceeded thresholds for safe drinking water. Nutrient levels, pH, temperature, and dissolved oxygen correlated with increased cyanobacterial growth. All water bodies showed moderate to high probability of adverse health effects from cyanobacteria. The study recommends comprehensive monitoring and pilot restoration projects to improve water quality and reduce cyanobacterial blooms in Hanoi.
Sea bird mortality at cabo san luca: presentation_fiddyFiddy Prasetiya
The document summarizes evidence that toxic diatom blooms responsible for sea bird mortality are spreading. Researchers analyzed stomach contents of pelicans and mackerel that died at Cabo San Lucas, Mexico, finding structures resembling the diatom Pseudonitzschia. Extracts from pelican viscera injected in mice showed low levels of the toxin domoic acid, causing diarrhea, convulsions and death. The study identifies Pseudonitzschia blooms as the source of bird toxicity from domoic acid, and recommends monitoring programs to detect future harmful algal blooms.
Primary production in Spuikom lagoon, BelgiumFiddy Prasetiya
This document presents a study that measured primary production in the Spuikom lagoon at different water depths. The objectives were to see if primary production differed between surface and bottom water and how it changed over time. Samples were taken from the surface and bottom at different times and oxygen levels were measured using Winkler titration to calculate net primary production, respiration, and gross primary production. Preliminary results showed slight increases in oxygen and net primary production over time but no clear differences between surface and bottom. More data is needed to fully evaluate the hypothesis.
This study analyzed the concentrations of heavy metals (Cu, Cr, Ni, Zn, Fe, Mn) and radioactive cesium (137Cs) in mussels (Mytilus galloprovincialis) collected from Thermaikos Gulf in Greece between April and October 2000. The metals levels were generally low and similar to unpolluted areas. Two temporal patterns were observed: cesium, nickel, and iron had minimum levels in spring and autumn, while copper, zinc, and manganese-chromium had maximum levels during those seasons. Overall, the results indicate low pollution levels in the gulf and validate the use of mussels as effective bioindicators of metal contamination in the marine ecosystem.
This document summarizes a study on changes in benthic fauna in the inner part of Ariake Bay between 1989 and 2006. The mean number of species, abundances, and biomass of macrobenthos declined significantly over this period. Benthic communities shifted from large, long-lived species to smaller, short-lived species, indicating long-term organic pollution. Distribution of dominant bivalve species also changed. The deterioration of the benthic ecosystem is likely due to increased hypoxia, sediment changes, and pollution stressors in the bay. Continued monitoring is needed to inform management decisions for restoring marine ecosystems and benthic habitats in Ariake Bay.
Allelopatic haslea ostrearia on different species of diatomsFiddy Prasetiya
1) The study examines the potential prophylactic effect of using the diatom Haslea ostrearia as feed for oysters by determining its allelopathic effects on other diatom species.
2) The methodology involves culturing H. ostrearia with other diatom species and measuring their growth rates and biovolumes over time under a microscope. Marennine concentration is also measured in each culture using HPLC analysis.
3) The results show reductions in growth rates and biovolumes of other diatom species when cultured with H. ostrearia, indicating allelopathic effects of marennine. This suggests H. ostrearia may have potential prophylactic effects for oysters.
The document consists of a long list of unintelligible symbols. As there is no meaningful information that can be understood or summarized from the document, it is not possible to provide a useful summary in 3 sentences or less.
2 kriteria plb3 agro & hasil 01 juni 2011 hh ok.pptFiddy Prasetiya
Bimbingan teknis tersebut membahas pengelolaan limbah berbahaya dan beracun (limbah B3) di sektor agroindustri, mencakup aspek-aspek peraturan, pengelolaan limbah B3, penggunaan pihak ketiga, dan pengujian mutu.
Dokumen tersebut membahas berbagai klasifikasi xenobiotik (bahan asing bagi tubuh) berdasarkan sumber, wujud, sifat kimia-fisika, proses terbentuknya, efek kesehatan, organ target, dan status hidup/matinya. Jenis xenobiotik yang dijelaskan meliputi racun alami, mikroba, tanaman, dan jamur yang dapat menyebabkan berbagai penyakit seperti kolera, botulisme, dan kanker.