scholarly journals Biomass production of Azolla microphylla as biofilter in a recirculating aquaculture system

2018 ◽  
Vol 2 (01) ◽  
pp. 14-19
Author(s):  
SUMOHARJO SUMOHARJO ◽  
MOHAMMAD MA’RUF ◽  
IRWAN BUDIARTO
Keyword(s):  
Growth Rate ◽  
Water Flow ◽  
Biomass Production ◽  
Oreochromis Niloticus ◽  
Recirculating Aquaculture System ◽  
Azolla Microphylla ◽  
Alternative Feed ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Set Up

Sumoharjo, Ma’ruf M, Budiarto I. 2018.Biomass production of Azolla microphylla as biofilter in a recirculating aquaculture system. Asian J Agric 2: 14-19. This study utilized macrophyte (Azolla microphylla Kaulf.) as biofilter and perhaps that biomass produced in aquaculture system can be potential for alternative feed. This experiment such a first step of that vision and was aimed to determine the Azolla microphylla growth rate and its efficiency in removing ammonia from a simple recirculating aquaculture system. The experimental units were set up in three different water flow, i.e. 3 lpm, 5 lpm, and 7 lpm onto the three different geometrically baseboard of Tilapia (Oreochromis niloticus) growing tanks (prism, rectangular and limas).The result showed that water flow did not give significant effect(P < 0.10) on the growth rate of Azolla.The lower water flow (3 lpm) resulted in the highest amonia biofiltration efficiency which can remove ammonia up to 32.2±3.0% of the total NH3-N and NH4+-N (TAN).

Effects of water flow rates on growth and welfare of Nile tilapia (Oreochromis niloticus) reared in a recirculating aquaculture system

2019 ◽  
Vol 27 (2) ◽  
pp. 449-462 ◽  
Author(s):  
Kwasi Adu Obirikorang ◽  
Nelson Winston Agbo ◽  
Christian Obirikorang ◽  
Daniel Adjei-Boateng ◽  
Sefakor Esinam Ahiave ◽  
...  
Keyword(s):  
Water Flow ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Recirculating Aquaculture System ◽  
Flow Rates ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Nile Tilapia Oreochromis Niloticus

Variability of the nitrifying bacteria in the biofilm and water column of a recirculating aquaculture system for tilapia ( Oreochromis niloticus ) production

2019 ◽  
Vol 50 (9) ◽  
pp. 2537-2544 ◽  
Author(s):  
Alessandro Del’Duca ◽  
Dionéia Evangelista Cesar ◽  
Thiago Archangelo Freato ◽  
Raíza dos Santos Azevedo ◽  
Edmo Montes Rodrigues ◽  
...  
Keyword(s):  
Water Column ◽  
Oreochromis Niloticus ◽  
Nitrifying Bacteria ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System

scholarly journals Performance of Brooders, Fry and Growth of the Nile Tilapia (<i>Oreochromis niloticus</i>) Cultured in an Experimental Recirculating Aquaculture System

2015 ◽  
Vol 06 (09) ◽  
pp. 1014-1022 ◽  
Author(s):  
José Luis Arredondo-Figueroa ◽  
Laura Georgina Núñez-García ◽  
Jesús T. Ponce-Palafox ◽  
Irene de Los Ángeles Barriga-Sosa
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System

scholarly journals Growth Performance of GMT and Mixed Sex Nile Tilapia Oreochromis niloticus on Natural and Supplemental Feeds

2007 ◽  
Vol 20 (4) ◽  
Author(s):  
P.W. PERSCHBACHER
Keyword(s):  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Food Sources ◽  
Natural Food ◽  
Ictalurus Furcatus ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Genetically Improved

Attention has been focused on genetically-improved stocks and strains of tilapia. A greenhouse recirculating aquaculture system (RAS) of three 540 L tanks stocked with 100 37.2 g genetically male tilapia (GMT) Nile tilapia, Oreochromis niloticus, and three identical tanks with the same number of 38.1 g mixed sex Nile tilapia, was used to measure response to floating 3.0 mm catfish pellets (32 % protein) fed once per day at four different rates based on body weight day-1 (2-4 % BW day-1). Feed rate and amount were changed every 14 days based on growth measurements. For growth comparisons on natural feeds (primarily phytoplankton), two 10.5 m3 net pens were each stocked in August with 105 7.7 g Nile tilapia m-3 of each group in each of two 1.0 ha blue catfish Ictalurus furcatus fingerling ponds and not fed. Fish were harvested in November. GMT fish outperformed mixed sex fish on both feed sources, and at most feed rates. In RAS trials at 2, 2.5, 3.0 and 4.0 % BW feeding, percentage growth day-1 was 1.95, 2.11, 2.21 and 3.31 for GMT, and 1.60, 2.22, 1.97 and 2.86 for mixed sex; and the associated food conversion ratio (FCR) was 1.54, 1.37, 1.37 and 1.04 and 1.64, 1.35, 1.42 and 1.20, respectively. At harvest in net pens, GMT fish were 25 % larger than mixed sex. Growth was 1.3 and 1.0 g day-1 on natural food sources for GMT and mixed sex, respectively.

Impact of feed ration on the growth and body weight variation in pikeperch (Sander lucioperca L.) at different life stages in a recirculating aquaculture system

2018 ◽  
Vol 26 (4) ◽  
pp. 201-210
Author(s):  
Michał Kozłowski ◽  
Mirosław Szczepkowski ◽  
Iwona Piotrowska ◽  
Bożena Szczepkowska
Keyword(s):  
Growth Rate ◽  
Body Weight ◽  
The Body ◽  
Fish Biomass ◽  
Recirculating Aquaculture System ◽  
Sander Lucioperca ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Vital Functions ◽  
The Impact

Abstract The aim of the study was to determine the impact of different feed rations (0.5, 0.8, 1.1% fish biomass) on the rearing parameters of pikeperch, Sander lucioperca (L.), reared in a recirculating aquaculture system. The study comprised two experiments. In the first, the material used had been sorted by a mean body weight of 35.5 g, while in the second the pikeperch were divided into three size classes: smallest individuals (class S) with a mean body weight of 59.5 g, medium-sized individuals (class M) with a mean weight of 69.3 g, and largest individuals (class L) with a mean body weight of 84.8 g. The experiments ran for 42 days. At the conclusion of the experiments, the highest body weight and length, daily growth rate, and specific growth rate were attained by the group of fish fed the ration of 1.1% of the fish biomass in both experiments I and II. The feed conversion ratio was also the lowest in this feed ration group, and it differed significantly statistically among the experimental groups (P < 0.05). The feed ration of 0.5% of the fish biomass was only sufficient to maintain vital functions, but it contributed only slightly to growth. The different feed rations did not have a significant impact on the final value of the body weight coefficient of variation of the pikeperch reared in the two experiments. The results of the experiment also indicated that pikeperch is a species with weak stock hierarchy and domination structure.

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