scholarly journals ​​Nursery Rearing of Penaeus vannamei in Biofloc Systems with Different Salinities and Organic Carbon Sources

2022 ◽  
Author(s):  
T. Anand ◽  
A. Srinivasan ◽  
P. Padmavathy ◽  
P. Jawahar ◽  
J. Stephen Sampathkumar
Keyword(s):  
Present Experiment ◽  
Carbon Sources ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Nitrogenous Waste ◽  
Significant Difference ◽  
Farming Industry ◽  
Waste Accumulation ◽  
Average Body ◽  
Lower Production

Background: Nursery rearing of Penaeus vannamei became inevitable in the Indian shrimp farming industry, since intensification of culture practices in grow-out systems caused nitrogenous wastes accumulation, diseases, mortality and premature harvests resulted in high food conversion ratio, lower production and profits. The nursery rearing in traditional water exchange systems often getting failure because of nitrogenous waste accumulation. Hence, the present experiment was planned to rear P. vannamei in bioflocs systems (BFS) with different salinities and carbon sources. Methods: The experiment was conducted in 0.22 m3 tanks with three different salinity groups viz., 35 ppt, 20 ppt and 5 ppt and in each salinity sugar, molasses used as carbon sources to maintain an estimated C/N ratio of 15:1 and controls without carbon sources. Experimental tanks were stocked @6 post larvae/l, with pre-salinity acclimatized P.vannamei seeds having 0.0029±0.0003g size and nursed for a period of 5 weeks. Result: The nitrogenous waste accumulation was reduced significantly (p less than 0.05), also average body weight and survival rate of the seeds showed significant difference (p less than 0.001) between treatments and controls and within treatments (p less than 0.05). Salinity, carbon sources and their interaction influenced the growth characteristics significantly (p less than 0.01). The present experiment manifested promising results of bioflocs nurseries in rearing of P. vannamei seeds at different salinities.

scholarly journals Determination of the Infectious Agent of Translucent Post-Larva Disease (TPD) in Penaeus vannamei

Pathogens ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 741 ◽  
Author(s):  
Ying Zou ◽  
Guosi Xie ◽  
Tianchang Jia ◽  
Tingting Xu ◽  
Chong Wang ◽  
...  
Keyword(s):  
Clinical Signs ◽  
Infectious Agent ◽  
Systematic Investigation ◽  
Shrimp Farming ◽  
Histopathological Analysis ◽  
Penaeus Vannamei ◽  
Challenge Tests ◽  
Acute Hepatopancreatic Necrosis Disease ◽  
Farming Industry

A new emerging disease called “translucent post-larvae disease” (TPD) or “glass post-larvae disease” (GPD) of Penaeus vannamei, characterized by pale or colorless hepatopancreas and digestive tract, has become an urgent threat to the shrimp farming industry. Following this clue that treatment of an antibacterial agent could alleviate the disease, systematic investigation of the potential infectious agent of TPD was conducted using bacterial identification and artificial challenge tests to fulfill Koch’s postulates. A dominant bacterial isolate, Vp-JS20200428004-2, from the moribund individuals was isolated and identified as Vibrio parahaemolyticus based on multi-locus sequence analysis. However, Vp-JS20200428004-2 differed from the V. parahaemolyticus that caused typical acute hepatopancreatic necrosis disease. Immersion challenge tests revealed that Vp-JS20200428004-2 could cause 100% mortality within 40 h at a dose of 1.83 × 106 CFU/mL, and experimental infected shrimp showed similar clinical signs of TPD. The Vp-JS20200428004-2 could be re-isolated and identified from the experimental infected individuals. Moreover, histopathological analysis of diseased samples indicated that Vp-JS20200428004-2 caused severe necrosis and sloughing of epithelial cells of the hepatopancreas and midgut in shrimp individuals both naturally and experimentally infected. Our present results indicated that Vp-JS20200428004-2 is a highly virulent infectious agent associated with the TPD and deserves further attention.

scholarly journals Sustainable Shrimp Farming: Biosecure Systems to Prevent or Control Emerging Diseases

2020 ◽  
Vol 3 (3) ◽  
Keyword(s):  
White Spot Syndrome Virus ◽  
Emerging Diseases ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Business Sustainability ◽  
Bacterial Diseases ◽  
Yellow Head Virus ◽  
Infectious Myonecrosis Virus ◽  
Specific Pathogen ◽  
Farming Industry

In any aquaculture business, sustainability of a system improved profits. At present although biosecurity and BAqP are in place, more needed to be done. With emerging disease challenges innovated designs and operation systems are developing for sustainable production. One of the most important factors the investors, shrimp farmers and technicians need to be aware of is that whatever waste discharged into environment will come back to you in a form of disease sooner or later. Before mid1990s major threats to shrimp farming was mainly bacterial diseases. In Asia from late 1994 appearance of viral diseases such as white spot syndrome virus (WSSV) and a few others like yellow head virus (YHV), infectious myonecrosis virus (IMNV). In 2001 with availability of Specific Pathogen Free (SPF) Penaeus vannamei broodstock from Hawaii, the shrimp farming industry took off much faster.

Assimilation of various organic carbon sources by Haematococcus strains

2009 ◽  
Vol 57 (2) ◽  
pp. 231-237
Author(s):  
M. Zych ◽  
A. Stolarczyk ◽  
K. Maca ◽  
A. Banaś ◽  
K. Termińska-Pabis ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Organic Compounds ◽  
Present Experiment ◽  
Carbon Sources ◽  
Growth Conditions ◽  
Mixotrophic Growth ◽  
Naturally Occurring ◽  
Organic Carbon Sources ◽  
Secondary Carotenoids ◽  
Colour Changes

Differences in the assimilation of individual organic compounds (5 mM sugars and L-asparagine) under mixotrophic growth conditions were described for three naturally occurring Haematococcus strains.The effects of assimilation were measured by the growth intensity and size of algal cells, and the effect of colour changes in the cultures was observed. Some compounds caused the cell colouration to change from green to yellow, being the result of chlorophyll disappearance and the accumulation of yellow secondary carotenoids. In the present experiment none of the cultures turned red, thus excluding the intense accumulation of the commercially interesting carotenoid, astaxanthin.

scholarly journals Sustainability and feasibility assessments of nanobubble aeration technology in economic-socio environment of Penaeus vannamei shrimp farming

2021 ◽  
Vol 33 ◽  
pp. 05005
Author(s):  
Lily Susanti ◽  
Suyud Warno Utomo ◽  
Noverita Dian Takarina
Keyword(s):  
Net Present Value ◽  
Ammonia Nitrogen ◽  
Payback Period ◽  
Economic Feasibility ◽  
Shrimp Farming ◽  
Penaeus Vannamei ◽  
Present Value ◽  
Community Members ◽  
The Social ◽  
Total Ammonia

Penaeus vannamei shrimp farming in Indonesia is faced with several challenges in the environmental, economic, and social aspects. Therefore, this study aims to assess the benefits of novel nanobubble aeration systems for the ecosystem, businesses, and communities. This is an experimental study conducted by comparing P. vannamei post larva 10 reared at a density of 2000 inds./L in a pond treated with nanobubble and without treatments (control). Furthermore, the Net Present Value (NPV) and payback period were calculated to assess the economic feasibility of nanobubble, while community interviews were used for the social sectors. Based on the results, environmental wastes of shrimp farming in form of total ammonia nitrogen (TAN) were reduced by 9% from 2.58 mg/l (95%CI: 0,91, 4,25) in control compared to 2.35 mg/l (95%CI: 0,86, 3,84) in treatment. Furthermore, the revenues from post larva sales for five years and nanobubble investment costs showed that the estimated NPV was IDR 64,824,374 with a payback period of 1.7 years. The interviews on traditional shrimp farming showed that 61.1% to 72.2% of community members agreed on the use of nanobubble aeration to support livelihoods. Therefore, the use of nanobubbles is feasible to support sustainable P. vannamei farming.

scholarly journals Changes in Adherence to the 24-Hour Movement Guidelines and Overweight and Obesity among Children in Northeastern Japan: A Longitudinal Study before and during the COVID-19 Pandemic

Obesities ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 167-177
Author(s):  
Hyunshik Kim ◽  
Jiameng Ma ◽  
Junghoon Kim ◽  
Daolin Xu ◽  
Sunkyoung Lee
Keyword(s):  
Environmental Changes ◽  
Preventive Measures ◽  
Overweight And Obesity ◽  
Health Programs ◽  
Average Body Mass Index ◽  
Northeastern Japan ◽  
Significant Difference ◽  
Community Health Programs ◽  
Average Body Mass ◽  
Average Body

There are few studies comparing adherence to Canadian 24-hour Movement Guidelines (24-h MG) before and during the COVID-19 pandemic and exploring the pandemic’s effect on childhood obesity. This survey-based 2-year study investigated changes in obesity and adherence to the 24-h MG in children before and during the COVID-19 pandemic. Data were collected at two points in time: pre-COVID-19 (May 2019; T1; n = 247) and during-COVID-19 (May 2021; T2; n = 171). Participants were healthy elementary school children aged between 6–12 years in northeastern Japan. The questionnaire comprised items on physical activity, screen time, sleep duration, adherence to the 24-h MG, and anthropometric and demographic characteristics. Among all participants, a statistically significant difference (p < 0.001) between the average body mass index at T1 (M = 16.06 kg/m2, SD = 2.08 kg/m2) and T2 (M = 18.01 kg/m2, SD = 3.21 kg/m2) was observed, where 17.8% were overweight and obese at T1 and 24% at T2, and 10.9% adhered to all 24 h MG at T1 and 4.1% at T2. To prevent obesity in children during the COVID-19 pandemic, environmental changes should be evaluated and appropriate preventive measures taken, including pro-community health programs that encourage parent-children outdoor activities.

scholarly journals Carbon sources and trophic position of the main species of fishes of Baía River, Paraná River floodplain, Brazil

2003 ◽  
Vol 63 (2) ◽  
pp. 283-290 ◽  
Author(s):  
G. I. Manetta ◽  
E. Benedito-Cecilio ◽  
M. Martinelli
Keyword(s):  
Trophic Position ◽  
Carbon Sources ◽  
Paraná River ◽  
C3 Plants ◽  
River Floodplain ◽  
Parana River ◽  
Main Species ◽  
Significant Difference ◽  
Iheringichthys Labrosus ◽  
Paraná River Floodplain

In order to verify the carbon source and trophic position of the main species of fishes, of the Paraná River floodplain, we analysed the proportion of stable carbon (delta13C) and nitrogen (delta15N) isotopes in muscle of fishes sampled in the rainy season. We analyzed adult individuals of Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, Auchenipterus osteomystax, Iheringichthys labrosus, Leporinus friderici, and Serrasalmus marginatus. These data were compared with the results obtained by the analyzing stomach contents. The primary producers found in the Baía River were the C3 plants (riparian vegetation, macrophytes, periphyton, and phytoplankton) and the C4 plants (macrophytes). The results of the contribution analysis revealed that the carbon used by the species was derived from C3 plants. According to the trophic position estimates (diet and delta15N), the species primarily consumed Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, and Leporinus friderici and, secondarily Auchenipterus osteomystax, Iheringichthys labrosus, and Serrasalmus marginatus. There was no significant difference between the two methods utilized.

scholarly journals Performance of perisel as shelter and periphyton substrate in the floating cage of vanname shrimp culture

2021 ◽  
Vol 20 (1) ◽  
pp. 65-71
Author(s):  
Rifka Liling Palinggi ◽  
Tatag Budiardi ◽  
Daniel Djokosetiyanto
Keyword(s):  
Negative Impact ◽  
Initial Density ◽  
Shrimp Farming ◽  
Production Performance ◽  
Feed Conversion ◽  
Shrimp Culture ◽  
Randomized Design ◽  
Significant Difference ◽  
Feed Source ◽  
Completely Randomized Design

Shrimp culture in the floating cage is expected to reduce the utilization of land and its possible negative impact to the environment. The advantages of shrimp farming in the sea include the high dissolved oxygen concentration and the better meat quality. This research aimed to enhance the production performance of shrimp through the utilization of periphyton as a natural feed for shrimp. A completely randomized design with 3 treatments (in triplicates) were applied in this experiment, i.e floating cage without perishel (control), floating cage with PE perishel and PA perishel. Shrimp with body weight of 2.5 ± 0.2 g were stocked at the initial density of 2,000 shrimp in each cage, and maintained for 90 days. No significant difference was observed in the survival amongst treatments. The lowest feed conversion ratio (1.74) and coefficient of variance (3.21) were showed in treatment PA. The highest attachment and abundances of periphyton were found in treatment PA. It was concluded that the addition of perishel inside the floating cage may contribute as natural feed source for the shrimp and thus increase the production performance of shrimp. Keywords: floating cage, Litopenaeus vannamei, periphyton, perisel, shelter ABSTRAK Budidaya udang di KJA diharapkan dapat menekan isu pemanfaatan daratan sebagai tambak yang berdampak pada permasalahan lingkungan. Keunggulan laut untuk budidaya udang, antara lain adalah kadar oksigen terlarut relatif tinggi sehingga tidak perlu kincir, dan mutu daging udang yang dihasilkan relatif lebih baik. Penelitian ini ditujukan untuk meningkatkan kinerja produksi dan memanfaatkan kesuburan perairan laut berupa perifiton sebagai pakan alami bagi udang. Penelitian ini terdiri atas tiga perlakuan, yakni: (A) kontrol (tanpa perishel), (B) jaring benang nilon (PE), dan (C) jaring benang serabut pendek (PA 6.6), masing-masing perlakuan terdiri dari tiga ulangan. Udang dengan bobot 2,5 ± 0,2 g ditebar sebanyak 2.000 ekor perwadah, dan dipelihara selama 90 hari. Hasil analisis kinerja produksi menunjukkan bahwa kelangsungan hidup tidak berbeda nyata antarperlakuan. Nilai konversi pakan terendah diperoleh pada perlakuan jaring benang PA dengan nilai 1,74. Nilai koefisien keragaman terendah diperoleh pada perlakuan jaring benang PA dengan nilai 3,21. Penempelan dan kepadatan perifiton yang cukup baik diperoleh pada jenis perishel jaring benang serabut pendek PA. Dengan demikian dapat disimpulkan bahwa dengan penambahan perishel sebagai shelter dan penumbuh perifiton diperoleh hasil produksi yang baik. Udang dapat memanfaatkan keberadaan perishel dalam wadah pemeliharaan sebagai tempat berlindung dan memperoleh makanan tambahan berupa pakan alami yang menempel pada perishel. Kata kunci: karamba jaring apung, perifiton, perisel, selter, udang vaname

scholarly journals ALKALINE PROTEASE, AMYLASE AND CELLULASE ACTIVITIES OF YELLOW RASBORA, Rasbora lateristriataBlkr., AT DIFFERENT FEEDING LEVELS

Molekul ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. 190
Author(s):  
Untung Susilo ◽  
Purnama Sukardi ◽  
Ridwan Affandi
Keyword(s):  
Body Weight ◽  
Alkaline Protease ◽  
Fish Biomass ◽  
Alkaline Proteases ◽  
Protein Digestion ◽  
Feeding Level ◽  
Significant Difference ◽  
The Difference ◽  
Average Body ◽  
Average Body Weight

Alkaline proteases, amylase and cellulase activities of digestive organ of yellow rasbora, Rasbora lateristriata Blkr., was evaluated with four different feeding levels of 0.34g protein+0.03g fiber, 1.01g protein+0.10g fiber, 1.69g protein+0.16g fiber and 2.36g protein+0.23g fiber/day/100 g fish biomass. A total of 280 fish with average body weight of 0.71±0.06g were used in this study. The results showed that the difference in the feeding levels resulted in a significant difference in trypsin and chymotrypsin  activities (P <. 05), but not for amylase and cellulase activities (P > .05). In conclusion, protein digestion capacity increased, but not to the digestion of starch and fiber in response to different feeding levels and the optimal feeding level for yellow rasbora was 1,01g protein+0,10g fiber/day/100 g fish biomass.

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