scholarly journals PENGARUH PENGAYAAN Artemia sp. DENGAN SUMBER DHA YANG BERBEDA TERHADAP SINTASAN LARVA LOBSTER PASIR (Panulirus homarus)

2021 ◽  
Vol 16 (1) ◽  
pp. 21
Author(s):  
Zeny Widiastuti ◽  
Fahruddin Fahruddin ◽  
I Gusti Ngurah Permana
Keyword(s):  
Water Quality ◽  
Spiny Lobster ◽  
Water System ◽  
Isochrysis Galbana ◽  
Larval Survival ◽  
The Body ◽  
Larval Rearing ◽  
Water Quality Control ◽  
Growth And Survival ◽  
Nutrient Contents

Kegiatan pembenihan lobster masih dikembangkan di Indonesia. Sintasan yang rendah dan pakan yang sesuai masih menjadi masalah utama dalam kegiatan pembenihan lobster. Artemia sebagai pakan utama diduga belum mencukupi kebutuhan nutrisi larva lobster. Upaya pemberian bahan pengaya sebagai alternatif untuk meningkatkan nutrisi diharapkan dapat meningkatkan sintasan larva lobster. Pemberian bahan pengaya yang mengandung asam lemak dokosa heksanoid acid (DHA) ke Artemia dianggap penting bagi pertumbuhan dan sintasan pada krustasea. Tujuan penelitian ini untuk mengetahui performa larva lobster berdasarkan tingkat sintasan maupun perkembangan larva dengan pemberian pakan artemia yang diperkaya dengan DHA. Perlakuan yang diberikan meliputi Artemia yang baru menetas (A), Artemia yang diperkaya dengan plankton Isochrysis galbana strain Tahiti konsentrasi (1-1,5 x 106 sel/mL) (B), DHA selco dosis 0,6 g/L (C), dan Artemia inkubasi 18 jam tanpa pengayaan (D). Pemeliharaan larva dilakukan pada bak 100 L dengan sistem air stagnan. Perkembangan larva yang mampu dicapai pada semua perlakuan adalah stadia-IIIa. Pemberian Artemia yang diperkaya dengan DHA selco menunjukkan hasil sintasan yang lebih baik pada pemeliharaan enam hari pertama namun tidak memberikan pengaruh yang signifikan. Pada masa pemeliharaan sampai 20 hari terjadi penurunan sintasan (SR) mencapai hanya 1%. Hal ini disebabkan adanya bakteri dan protozoa seperti jenis protozoa Zoothamnium sp. dan bakteri berfilamen teramati menempel pada tubuh larva sehingga mengganggu pergerakan dan kemampuan larva dalam menangkap mangsa. Berdasarkan penelitian ini maka penggunaan pakan Artemia yang diperkaya DHA Selco dapat menjadi alternatif pakan larva lobster namun tetap diperlukan kontrol kualitas air yang baik.Efforts to culture spiny lobster, Panulirus homarus larvae are still being developed in Indonesia. One of the main challenges in lobster hatcheries is to find an appropriate feed and improving larval survival. Artemia has been used as the main feed and considered to have insufficient nutritional ingredient for lobster larvae. Enrichment of feed to improve its nutrient contents is expected to increase the larval survival. DHA-enriched feed is considered essential for growth and survival of crustaceans. The aim of this study was to determine the survival and development of larvae fed with DHA-enriched Artemia. The treatments consisted of newly hatched Artemia (A), enriched Artemia with phytoplankton, Isochrysis galbana strain Tahiti at a density of 1-1.5 x 106 cells/mL (B), enriched Artemia with DHA selco at a dose of 0.6 g/L (C), and Artemia incubated for 18 hours without DHA enrichment (D). Each Artemia enrichment was performed for 18 hours. Larval rearing was carried out in a 00 L tank with static water system. The achieved larval developmental stage in all treatments was stage-IIIa. Administration of enriched Artemia with DHA selco showed a better larval survival during the first six days of larval rearing. But, it did not give any significant effect. The survival was then decreased to only 1% on day-20. This was due to the presence of bacteria and protozoa which decreased water quality. Protozoa Zoothamnium sp. and filamentous bacteria were observed attaching to the body of the larvae, disrupting the movement and ability of larvae in capturing prey. Based on this research, the use of Artemia enriched with DHA selco as an alternative for lobster larvae feed, but better water quality control is still needed.

scholarly journals Transformation of the water system of the Education City in Doha into a smart water system

2019 ◽  
Vol 295 ◽  
pp. 01003
Author(s):  
Abdallah AL-NAEMI ◽  
Isam SHAHROUR
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Real Time ◽  
Fire Protection ◽  
Water Solution ◽  
Water System ◽  
Management Systems ◽  
Water Quality Control ◽  
Smart Water ◽  
Education City

This paper presents the transformation of the water system of the Education City in Doha (Qatar) into a smart water system. This city covers an area of 14 km2 and includes 80 buildings. The water system provides drinking, irrigation and fire protection services. It suffers from the use of fragmented management systems and from a lack of real-time monitoring, which result in a deterioration of efficiency of the water system and users’ information The paper describes the water system and then the architecture of the smart water solution and its use for leak detection, water quality control and operation safety.

scholarly journals Growth and survival of spiny lobster, Panulirus homarus fed fresh food and formulated diet

2021 ◽  
Vol 890 (1) ◽  
pp. 012036
Author(s):  
Sudewi ◽  
N W W Astuti ◽  
Fahrudin ◽  
I N A Giri ◽  
B Slamet
Keyword(s):  
Spiny Lobster ◽  
Water System ◽  
Good Survival ◽  
Good Growth ◽  
Feeding Experiment ◽  
Growth And Survival ◽  
Formulated Diet ◽  
Fresh Food ◽  
Randomized Design ◽  
Small Mussel

Abstract To date, lobster aquaculture relies on fresh food for feeding; however, the availability of fresh food is limited and its excessive use causes environmental degradation. Therefore, formulated diet is required to establish sustainable lobster aquaculture. Concerning this issue, this study was carried out to assess the growth and survival of spiny lobster Panulirus homarus fed fresh food and formulated diet. The study was conducted in a completely randomized design (CRD) with 3 groups of treatments and 3 replicates for each treatment. Feeding experiment was performed in a flow-through water system using 9 fibre tanks, 4000 L in volume. Each tank was stocked with 40 lobsters, with initial weight of 78.08 ± 0.22 g. Each group of lobsters was fed with fresh food (A), formulated diet (pellet) (B) and a combination of pellet and fresh food (C). The fresh food was a mixture of fish, crabs, shrimp and small mussel (3:1:1:1). Feeding experiment was done for 15 weeks. Results of the experiment showed that the highest specific growth rate of lobster was obtained from lobsters fed with the combination of pellet and fresh food (0.52 ± 0.02 %/day) and the lowest growth was resulted from lobsters fed formulated diet (0.16 ± 0.03 %/day). In contrast, the highest survival was achieved in lobsters fed formulated diet (51.67%). Whereas the lowest survival was found in lobsters fed fresh food (10%). This study indicated that good growth of lobster was resulted from feeding with formulated diet combined with fresh food, while good survival was supported by feeding with formulated diet.

scholarly journals Short Communication: The lifecycle of Neocaridina denticulata and N. palmata in aquariums

2020 ◽  
Vol 21 (6) ◽  
Author(s):  
HANAN HASSAN ALSHEIKH MAHMOUD ◽  
MOH. HUSEIN SASTRANEGARA ◽  
Endang Srimurni K Kusmintarsih
Keyword(s):  
Water Quality ◽  
Life Cycle ◽  
Short Communication ◽  
Ammonia Level ◽  
Quality Parameters ◽  
The Body ◽  
Maturity Stage ◽  
Water Parameters ◽  
Growth And Survival ◽  
Neocaridina Denticulata

Abstract. Mahmoud HHA, Sastranegara MH, Kusmintarsih ES. 2020. Short Communication: The lifecycle of Neocaridina denticulata and N. palmata in aquariums. Biodiversitas 21: 2396-2402. The study on the life cycle of Neocaridina spp. is important because it plays a major role in the economy and trade between countries. However, there is a lack of sufficient studies on this particular topic. One of the factors that influence Neocaridina spp. life production is its life cycle and the associated water parameters. The objectives of this study were to conduct, observe, and record the life cycle of Neocaridina denticulata and N. palmata and the associated with water parameters (temperature, pH, ammonia, nitrite, and oxygen) in the aquarium. The results showed that there was no difference in the life cycle stages between the two shrimp species. Both species reached the first sexual maturity stage of the life cycle at 75 days, with the maximum body length of the mature shrimp ranging from 2.30-3.00 cm. The eggs became larvae in 15 days, larvae reached the juvenile stage after 60 days, and the juvenile became mature in 15 days. The number of eggs was influenced by the body size of the female shrimps; smaller females produced fewer eggs. Optimal water quality varies by species and must be monitored to ensure growth and survival. The temperature range in this study was 25-28°C and the pH was 6.5-8.0. The ammonia level was in the range between 1.21 and1.72 mg/L, the nitrate was between 0.06 and 7.91 mg/L, and the oxygen was around 5.5-7.9 mg/L. All of the water quality parameters in this study are within the acceptable range for Neocardina cultivation.

QUALIDADE DAS ÁGUAS E NÍVEL TRÓFICO DA BACIA DO RIO PACIÊNCIA NA ILHA DO MARANHÃO, BRASIL

2019 ◽  
Vol 21 (2) ◽  
pp. 437-453
Author(s):  
Elna Lucilia Santos Corrêa ◽  
Karina Suzana Feitosa Pinheiro ◽  
Cláudio José Da Silva de Sousa ◽  
Luiz Jorge Bezerra da Silva Dias
Keyword(s):  
Water Quality ◽  
Trophic Status ◽  
The Body ◽  
Chemical Parameters ◽  
Public Supply ◽  
Physico Chemical ◽  
Great Availability ◽  
Del Rio ◽  
Fluvial Environments

O Brasil apresenta grande disponibilidade de água doce em seus mananciais. Fazendo parte desse recurso encontra-se, o rio Paciência, localizado na Ilha do Maranhão destacado pela sua importância local, principalmente por contribuir com suas águas para recarga dos mananciais subterrâneos, fonte de abastecimento público de vários bairros de São Luís, capital do estado. No entanto, este rio vem sofrendo comprometimento da qualidade de suas águas, consequência do processo de uso e ocupação dos espaços em sua bacia. Destacando-se como um dos principais problemas relacionados a qualidade de ambientes fluviais,  a eutrofização, que consiste no processo em que o corpo d’água adquire elevados níveis de nutrientes (fosfatos e nitratos), é um indicador determinante da qualidade da água. Neste sentido, o objetivo deste trabalho foi caracterizar a qualidade da água e do estado trófico na bacia hidrográfica do rio Paciência atráves dos parâmetros fisico-químico evidenciando os trechos mais comprometidos conforme os valores alcançados nas análises. Os resultados das análises foram comparados com a CONAMA No. 357/05 que indicaram uma situação preocupante quanto à qualidade da água no local de estudo.Palavras-chave: Qualidade de água; Eutrofização; Ilha do Maranhão. ABSTRACTThe Brazil has great availability of fresh water in its springs. Within these contexts, the Paciência River, located on the Island of Maranhão stands out for its local importance, mainly for contributing its waters to the recharge of the underground springs, source of public supply of several districts of São Luís, capital of the state. However, this river has been compromising the quality of its waters, a consequence of the process of use and occupation of the spaces in its basin. Highlighting as one of the main problems related to the quality of fluvial environments, eutrophication, which consists of the process in which the body of water acquires high levels of nutrients (phosphates and nitrates), is a determinant indicator of water quality. In this sense, the objective of this work was to characterize the water quality and trophic status in the Paciência river basin through the physico-chemical parameters, showing the most compromised stretches according to the values reached in the analyzes. The results of the analyzes were compared with CONAMA No. 357/05 which indicated a worrying situation regarding the quality of the water at the place of study.Keywords: Water quality; Eutrophication; Island of Maranhão. RESUMENBrasil tiene gran disponibilidad de agua dulce en sus manantiales. Parte de este recurso es el río Paciencia, ubicado en la isla de Maranhão, que destaca por su importancia local, principalmente porque contribuye con sus aguas a recargar las fuentes subterráneas, fuente de suministro público de varios barrios de São Luís, capital del estado. Sin embargo, este río se ha visto afectado por la calidad de sus aguas, como consecuencia del proceso de uso y ocupación de los espacios en su cuenca. Destacando como uno de los principales problemas relacionados con la calidad de los ambientes fluviales, la eutrofización, que consiste en el proceso en el que el cuerpo de agua adquiere altos niveles de nutrientes (fosfatos y nitratos), es un indicador determinante de la calidad del agua. En este sentido, el objetivo de este trabajo fue caracterizar la calidad del agua y el estado trófico en la cuenca del río Paciência a través de los parámetros fisicoquímicos, mostrando las secciones más comprometidas de acuerdo con los valores alcanzados en los análisis. Los resultados de los análisis se compararon con CONAMA N°. 357/05, que indicó una situación preocupante con respecto a la calidad del agua en el sitio de estudio.Palabras clave: Calidad del agua; Eutrofización, Isla Maranhão.

Влияние экологического состояния водоисточника на режим работы водопроводных очистных сооружений

2020 ◽  
Author(s):  
P. Bykova ◽  
I. Egorova ◽  
A. Strelkov ◽  
L. Talovyria ◽  
O. Nesterenko ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Reservoir ◽  
Water Source ◽  
Optimal Dose ◽  
Source Water ◽  
Regulatory Requirements ◽  
Water Quality Control ◽  
Water Abstraction ◽  
The City

При изучении качества воды источника водоснабжения г. Самары Саратовского водохранилища особое внимание было уделено основным показателям, влияющим на выбор реагентной обработки: мутность, перманганатная окисляемость и цветность. Сезонные изменения качества воды водохранилища требуют постоянной корректировки дозы реагентов с целью достижения нормативных требований к качеству очищенной воды. Приводятся результаты производственных исследований изменения качества воды Саратовского водохранилища в створе водозаборов г. Самары за 20172019 годы по мутности, перманганатной окисляемости и цветности. В связи с аномальными температурными перепадами и наступлением осеннего паводка (конец декабря 2019 г. и январь 2020 г.) резко изменилось качество воды водохранилища по цветности и перманганатной окисляемости. Отмечено, что увеличение указанных показателей потребовало повышения дозы реагентов при очистке исходной воды. Оптимальная доза реагентов постоянно коректируется в зависимости от состава исходной воды на флокуляторе Lovibond ЕТ-750 . Регулярное проведение пробного коагулирования позволило поддерживать качество очищенной воды в соответствии с нормативными требованиями СанПиН 2.1.4.1074-01 Питьевая вода. Контроль качества , кроме цветности и железа общего, так как превышение этих показателей наблюдалось в пределах погрешности методов измерения.While studying the water quality of the water source of the city of Samara the Saratov water reservoir, special attention was paid to the main indicators that influence the choice of chemical treatment: turbidity, permanganate index and color. Seasonal changes in the water quality of the water reservoir require constant adjustment of the chemical dose in order to meet the regulatory requirements to the quality of treated water. The results of the studies of changes in the water quality of the Saratov reservoir at the water abstraction points of the city of Samara for 20172019 by turbidity, permanganate index and color are presented. Due to the abnormal temperature differences and onset of autumn flood (end of December 2019 and January 2020), the water quality in the water reservoir dramatically changed in color and permanganate index. It was noted that an increase in these indicators required an increase in the dose of chemicals during the source water purification. The optimal dose of chemicals is selected with Lovibond ET-750 flocculator depending on the composition of the source water. Regular test coagulation allowed maintaining the quality of purified water in accordance with the regulatory requirements of SanPiN 2.1.4.1074-01 Drinking water. Quality control , except for color and total iron since the values of these indicators were increased within the measurement accuracy.

Sewers and the Quality of Canals and Ditches in Amsterdam

1993 ◽  
Vol 27 (5-6) ◽  
pp. 61-67 ◽  
Author(s):  
E. Jacobs ◽  
J. W. van Sluis
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Sediment Quality ◽  
Water System ◽  
Water Systems ◽  
Sewer System ◽  
Water And Sediment ◽  
Combined Sewer ◽  
Water And Sediment Quality

The surface water system of Amsterdam is very complicated. Of two characteristic types of water systems the influences on water and sediment quality are investigated. The importance of the sewer output to the total loads is different for both water systems. In a polder the load from the sewers is much more important than in the canal basin. Measures to reduce the emission from the sewers are much more effective in a polder. The effect of these measures on sediment quality is more than the effect on water quality. Some differences between a combined sewer system and a separate sewer system can be found in sediment quality.

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