Effects of Bacillus methylotrophicus WM‐1 on water quality dynamics and cultural fish in grass carp culture system

2021 ◽  
Author(s):  
Mi Jiang ◽  
Wenjin Zhang ◽  
Lijun Luo ◽  
Xiaoqi Tang ◽  
Yanhong Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Grass Carp ◽  
Culture System ◽  
Bacillus Methylotrophicus

WATER QUALITY IN AN INTEGRATED CULTURE OF WHITE SHRIMP (Litopenaeus vannamei)-TOMATO (Lycopersicon esculentum) USING LOW SALINITY GROUNDWATER IN SONORA, MEXICO

2013 ◽  
Vol 50 (2) ◽  
pp. 306-319 ◽  
Author(s):  
M. MARTIN MARISCAL-LAGARDA ◽  
FEDERICO PÁEZ-OSUNA ◽  
JOSÉ LUIS ESQUER-MÉNDEZ ◽  
ILDELFONSO GUERRERO-MONROY ◽  
ALONSO-ROMO DEL VIVAR ◽  
...  
Keyword(s):  
Water Quality ◽  
Lycopersicon Esculentum ◽  
Water Consumption ◽  
Litopenaeus Vannamei ◽  
Culture System ◽  
White Shrimp ◽  
Semiarid Region ◽  
Total N ◽  
Tomato Plants ◽  
Low Salinity

SUMMARYThe aim of this work was to test the performance of a shrimp-tomato culture system (STCS) in an arid-semiarid region (Sonora, Mexico) and to evaluate the water quality variables and phytoplankton variation of shrimp effluent and that water returning from the tomato module culture. The field study was conducted using groundwater and consisted of three circular tanks that were used for shrimp (Litopenaeus vannamei) farming and were coupled to one culture module of tomato plants (Lycopersicon esculentum). The shrimp effluent was used to irrigate the tomato plants. The yield was 11.1±0.2 kg shrimp per tank (3.9±2.0 ton ha−1) and 33.3 kg tomatoes per 45 plants (36.1±2.3 ton ha−1). During the culture, the concentrations of nutrients were (mg L−1): total N-ammonia, <0.001–0.848; N-nitrite, <0.001–1.45; N-nitrate, 5.2–172.2; dissolved reactive-P, <0.005–0.343. A total of 35 taxa belonging to three different algal classes were observed: Chlorophyta (87 to 98%), Bacilliariophyta (2 to 9%) and Cyanophyta (0–3%). This STCS allowed us to harvest the equivalent of 3.9 ton ha−1 of shrimp and 36.3 ton ha−1 of tomatoes, with a water consumption of 2.1 m3 per kg harvested of both products.

The Ecological Engineering Mode Design for the Purification of Miniature Landscape Lake

2012 ◽  
Vol 209-211 ◽  
pp. 305-309
Author(s):  
Liu Guo ◽  
Feng Mei Hu
Keyword(s):  
Water Quality ◽  
Grass Carp ◽  
Rational Design ◽  
Higher Plants ◽  
Ecological Engineering ◽  
Purification Method ◽  
Mode Design ◽  
Landscape Lake ◽  
Filter Feeders ◽  
Ideal Method

According to the requirement of water quality function of the miniature landscape lake, the ecological engineering mode has been used to search for the purification method of miniature landscape lake through rational design for size and density of filter feeders, plant-eating fish and aquatic higher plants. The predication results show that: The chub and bighead with the dosing density of 300 fix phosphorus 11.767 kg. The mussels with the dosing density of 0.15 fix phosphorus 1.731 kg. The phosphorus fixed by 70 grass carp and lotus is 0.192 kg and 1.5 kg. The removal of phosphorus is total 15.19 kg, which exceeds the annual phosphorus input of the lake. The prediction effect on ecological engineering mode design is ideal and it can be looked as an ideal method to purify miniature landscape lakes.

scholarly journals The Effectiveness of pen‒culture construction for cultivation of sea cucumber

2018 ◽  
Vol 17 (1) ◽  
pp. 26
Author(s):  
Pitjont Tomatala ◽  
Petrus Paulus Letsoin ◽  
Evangelin Martha Yulia Kadmaer
Keyword(s):  
Water Quality ◽  
Survival Rate ◽  
Culture System ◽  
Sea Cucumber ◽  
Economic Value ◽  
Ocean Waves ◽  
Visual Observation ◽  
Marine Biota ◽  
Sea Cucumbers ◽  
Waves And Currents

<p align="center"><strong>Abstract</strong></p><p>Sea cucumber <em>Holothuria </em>sp. is a marine biota that has economic value. The rearing activity of sea cucumbers is still limited to the have bay or strait areas with relatively calm coastal. This research aimed to determine the effectiveness of two types of pen‒culture system for sea cucumber rearing to the influence of ocean waves and currents. This research was done from February to July 2017 in the coastal of Rat village, Southeast Maluku Regency. The two of cultivated containers tested were a conventional pen‒culture (treatment A) and engineered pen‒culture (treatment B). A total of 30 individuals sea cucumber seeds sized 4‒6 cm were released at each pen‒culture. Survival rate and water quality were also calculated as supporting data. Observation of endurance and clearance of pen‒culture was done every two weeks. The result of visual observation showed that conventional pen‒culture treatment A was more quickly damaged and it was more damaged compared to engineered pen-culture treatment B.Through t‒test we got T <sub>count</sub> (1.065) &lt; T<sub>table</sub> (6.313) for survival and T <sub>count</sub> (0.084) &lt; T<sub>table</sub> (1.782) for growth. The result means that treatment A and treatment B have the same effect onsurvival rate and growth of sea cucumber. The results showed that treatment B was better applied to more open waters than treatment A.</p><p> </p><p>Keyword: endurance, pen‒culture, sea cucumber, survival, growth</p><p> </p><p> </p><p align="center"><strong>Abstrak</strong></p><p>Teripang <em>Holothuria </em>sp. merupakan biota laut yang memiliki nilai ekonomis. Kegiatan budidaya teripang masih terbatas pada daerah‒daerah yang berteluk atau berselat dengan perairan yang relatif tenang. Penelitian ini bertujuan untuk membandingkan efektivitas dua sistem budidaya teripang dalam kurungan tancap terhadap pengaruh gelombang laut dan arus. Penelitian ini berlangsung dari bulan Februari hingga Juni 2017 di perairan Desa Rat, Kabupaten Maluku Tenggara. Dua tipe wadah budidaya yang diujicobakan adalah kurungan tancap konvensional (perlakuan A) dan kurungan tancap yang direkayasa (perlakuan B). Pada setiap kurungan tancap, dimasukkan teripang pasir berukuran 4‒6 cm sebanyak 30 ekor. Sebagai data pendukung, dihitung persentase kelangsungan hidup dan pengukuran kualitas air. Pengamatan ketahanan dan kebersihan kurungan tancap dilakukan setiap dua minggu sekali. Hasil pengamatan visual diketahui bahwa kurungan tancap perlakuan A lebih cepat rusak dan mengalami kerusakan yang lebih besar dibandingkan perlakuan B. Melalui uji-tdiperoleh hasil T<sub>hitung</sub> (1,065) &lt; T<sub>tabel</sub> (6,313) untuk kelangsungan hidup, dan T<sub>hitung </sub>(0,084) &lt; T <sub>tabel</sub> (1,782) untuk pertumbuhan.  Hasil uji‒t bermakna bahwa perlakuan A dan perlakuan B memiliki pengaruh yang sama terhadap kelangsungan hidup dan pertumbuhan teripang. Hasil pengamatan menunjukkan bahwa perlakuan B lebih baik diaplikasikan pada perairan yang lebih terbuka dibandingkan perlakuan A.</p><p> </p><p>Kata kunci: ketahanan, kurungan tancap, teripang, kelangsungan hidup, pertumbuhan</p><p> </p>

scholarly journals Bacterial Communities Associated With Penaeus vannamei Boone, 1931 Surface and Its Rearing Water in Biofloc Culture System

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
PALLAVI BALIGA ◽  
PUNEETH THADOORU GOOLAPPA ◽  
MALATHI SHEKAR ◽  
S.K. GIRISHA ◽  
RAMESH K.S. ◽  
...  
Keyword(s):  
Water Quality ◽  
Bacterial Community ◽  
Water Samples ◽  
Bacterial Communities ◽  
Culture System ◽  
Bacterial Community Composition ◽  
Pond Water ◽  
Penaeus Vannamei ◽  
Shrimp Culture ◽  
Surface Samples

The biofloc system is an ecologically sustainable shrimp culture system. The conglomerates of beneficial bacteria, algae and protozoa in pond water serve as a water quality management system and as a feed additive to the shrimps. This study aimed to characterise the microbial communities associated with the biofloc pond water and the surface of Penaeus vannamei Boone, 1931, reared in it using the Illumina Miseq sequencing technology. The multiple alpha diversity measures indicated the shrimp surface samples to be richer in diversity than the pond water samples. Analysis of the bacterial community revealed that Proteobacteria, Bacteroidetes, Planctomycetes and Cyanobacteria formed the principal phyla. There was a shift in the relative abundance of bacterial communities at each time point. The operational taxonomic units (OTU) analyses revealed that 18.38 % OTUs were shared by the pond water samples, the shrimp surface samples shared 29.35 % at the three different time points. PICRUST analysis revealed that the bacterial communities in the biofloc rearing water, and shrimp surface, were likely involved in intensive microbial metabolism and core housekeeping functions. The information generated will help understand the bacterial community composition associated with optimal water quality and shrimp health in a biofloc culture system.

scholarly journals Modified photoperiods and light intensities for grow-out production of nile tilapia (O. niloticus) under indoor tank culture system

2018 ◽  
Vol 192 ◽  
pp. 03011
Author(s):  
Marvin Cinense ◽  
Ireneo Agulto ◽  
Armando Espino ◽  
Romeo Gavino ◽  
Emmanuel Sicat ◽  
...  
Keyword(s):  
Water Quality ◽  
Light Intensity ◽  
Growth Performance ◽  
Culture System ◽  
High Water ◽  
Control Treatment ◽  
Feed Conversion ◽  
Tank Culture ◽  
Light Intensities ◽  
Set Up

The study aimed to evaluate the effect of modified photoperiods and light intensities on grow-out production of tilapia under indoor tank culture system; specifically on water quality and on growth performance of tilapia. The study was conducted inside the greenhouse and considered two factors: photoperiod (24L:0D, 20L:4D and 16L:8D); and light intensity (40 watts m-2, 60 watts m-2 and 80 watts m-2); also, a control treatment was set-up outside the greenhouse to receive the normal environmental condition. Light manipulations inside the greenhouse were able to sustain the water quality within the desirable level for tilapia cultured in tank; while control tanks shows high water quality variation. Growth performance of tilapia cultured in tank responds positively in prolonged photoperiod at different light intensities. However, light manipulation gave insignificant difference on feed conversion ratio and survival rate compared to normal condition. Results indicated that 20-hours photoperiod and 40 watts m-2 light intensity is just enough to sustain the recommended water quality and better growth performance of the cultured tilapia in indoor tank system. It can be concluded that longer photoperiod and restrained light intensity can improved the growth performance of tilapia under indoor tank culture.

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