scholarly journals Impact of control of the golden mussel on the production costs of tilapia bred in net cages

2018 ◽  
Vol 44 (1) ◽  
pp. 110-115
Author(s):  
Jesaías Ismael COSTA ◽  
Maria Inez Espagnoli MARTINS ◽  
Daercy Maria Monteiro de Rezende AYROZA
Keyword(s):  
Production Costs ◽  
Net Cages ◽  
Golden Mussel

scholarly journals BIOACCUMULATION OF METALS AND EVALUATION OF GOLDEN MUSSELS ENCRUSTED ON DIFFERENT SCREENS OF NET CAGES

2021 ◽  
Vol 47 ◽  
pp. e624
Author(s):  
Mateus Antonio BESEN ◽  
Nilton Garcia MARENGONI
Keyword(s):  
Experimental Design ◽  
Total Mass ◽  
Metal Accumulation ◽  
Average Mass ◽  
Net Cage ◽  
Net Cages ◽  
Golden Mussel

This study aimed to evaluate the characterization and bioaccumulation of metals of the golden mussel encrusted in the screens of net cages installed in the reservoir of Itaipu Binacional. The experimental design was completely randomized, composed of two types of screens (PVC and Bezinal) distributed on four sides (Sides I, II, III, and IV) of the net cage. The total mass, the average mass, and the dimensions (width, height, and length) of the mollusks were evaluated. The mussels adhered to the Bezinal screen presented a higher average mass, length, height, and width than those colonized on the PVC screen (p <0.05). However, the PVC screen provided a greater (p <0.05) total mass of encrusted mussels. Regardless of the screen used, the average mass and length of mussels had higher values on Side I (p <0.05) than to the Sides II and IV, but not different from Side III. The mussels evaluated showed high levels of metals, and those encrusted in the Bezinal screen presented higher levels of Al, Zn and Cr than the individuals on the PVC screen (p <0.05). The use of a Bezinal screen is more efficient than a PVC screen, as an antifouling material. Mussels with shorter lengths had a higher incidence on the PVC screen. The mussels encrusted in the Bezinal screen bioaccumulate higher content of Al, Zn, and Cr. The type of screen used in the net cages influences the mass and size of adhered mussels, as well as can interfere with the metal accumulation in the golden mussel.

scholarly journals IPTEKS Bagi Masyarakat Kelompok Pembudidaya Lobster

2021 ◽  
Vol 1 (1) ◽  
pp. 25-29
Author(s):  
Muhammad Junaidi ◽  
Ayu Adhita Damayanti ◽  
Bagus Dwi Hari Setyono ◽  
Nunik Cokrowati
Keyword(s):  
Raw Materials ◽  
Monitoring And Evaluation ◽  
Production Costs ◽  
Group Training ◽  
Feed Costs ◽  
Increasing Demand ◽  
Net Cages ◽  
The Cost ◽  
Activity Method ◽  
Additional Income

Due to the increasing demand for lobster raw materials, the demand for lobster seeds continues to increase. UD Sari Laut as a lobster farming group is struggling to meet the demand for lobsters due to the limited number of floating net cages (In Indonesian called KJA) for running lobster seed farms. In an intensive lobster farming business, it is estimated that about 70% of production costs come from feed costs. The aim of this activity is to implement waste fishing technology using floating maps to increase the scale of lobster farming and reduce feed purchase costs. The activity method used is the demonstration plot directly with activity partners with activity stages including preparation for the purchase of floating net cages (KJA) and floating maps, group training, coaching, monitoring and evaluation. The result of this activity was the addition of KJA plots to 9 plots, previously only 6 plots giving a positive value to UD Sari Laut. Besides being able to house about 1,350 lobster seeds, with the addition of KJA plots it can also be used for lobster seed nursery operations with a profit of Rp. 2,970,000/month. The results of the garbage floating cards purchasing activity to meet the need for comprehensive lobster culture feed in KJA provides positive value for KUB Cinta Bahari. Where before having a floating card, the growers usually bought waste fish from fishermen around the site. The cost of buying waste fish ranges from Rp. 30,000 - Rp 50,000, depending on the season and the size of the business. So, with the operation of the floating card, the production cost of feed can be reduced. The existence of this floating card provides additional income, selling fish of high commercial value in the market. The conclusion of this activity is that this activity has a positive value for the target group, by increasing the number of floating net cages for the storage and breeding of lobster seeds and the availability of floating card cages.

Net cages enhance golden mussel ( Limnoperna fortunei ) larval density and condition factor

2019 ◽  
Vol 64 (9) ◽  
pp. 1593-1602
Author(s):  
Daercy Maria Monteiro de Rezende Ayroza ◽  
Clovis Ferreira do Carmo ◽  
Antonio Fernando Monteiro Camargo ◽  
Márcia Divina Oliveira ◽  
Maria Letizia Petesse
Keyword(s):  
Condition Factor ◽  
Larval Density ◽  
Limnoperna Fortunei ◽  
Net Cages ◽  
Golden Mussel

Establishment and Production Costs for Peach Orchards in Florida: Enterprise Budget and Profitability Analysis

EDIS ◽  
2017 ◽  
Vol 2017 (4) ◽  
Author(s):  
Ariel Singerman ◽  
Marina Burani Arouca ◽  
Mercy A. Olmstead
Keyword(s):  
Discount Rate ◽  
Production Costs ◽  
Fixed Costs ◽  
Average Price ◽  
Land Preparation ◽  
Profitability Analysis ◽  
Enterprise Budget ◽  
Marketable Fruit ◽  
Peach Orchard

The article summarizes the establishment and production costs, as well as the potential profitability of a peach orchard in Florida. Our findings show the initial investment required for a peach operation in Florida to be $6,457 per acre; the expense in land preparation and planting alone in year 1 is $2,541 per acre. Variable and fixed costs in years 2 through 15 average $5,680 per acre. As an example of profitability, when using a 10% discount rate, an operation yielding 6,525 (7,254) pounds of marketable fruit per acre during its most productive years obtains a positive NPV when the average price is $2.38 ($2.13) per pound.

Peeping at nature with the Reverend Charles A. Hall FRMS (1872–1965)

2015 ◽  
Vol 42 (1) ◽  
pp. 10-22 ◽  
Author(s):  
P. G. Moore
Keyword(s):  
Nineteenth Century ◽  
Natural History ◽  
Production Costs ◽  
Visual Appeal ◽  
Young Readers ◽  
Simple Language ◽  
Quality Production

Attention is drawn to the contents, pedagogic style and visual appeal of the 17-volume “Peeps at nature” series published by A. & C. Black between 1911 and 1935. Edited by the Reverend Charles Albert Hall (a Swedenborgian minister), who also contributed most of the titles, this series was a quality production but one that was cheap enough to be readily accessible to young readers. Its volumes were written in simple language and included colour pictures. With time, the flamboyant artistry of the covers that so characterized the earlier volumes was replaced by more muted designs, possibly to reduce production costs. Later contributors abandoned anthropomorphism and the moralizing tone of many nineteenth-century popularizers of natural history, although styles of writing varied between the early and later contributors to the series, becoming less technical with time.

CONVEYOR MODEL AND IMPLEMENTATION OF THE REAL NUMBERS ADDER ON FPGA

2020 ◽  
Vol 33 (109) ◽  
pp. 21-31
Author(s):  
І. Ya. Zeleneva ◽  
Т. V. Golub ◽  
T. S. Diachuk ◽  
А. Ye. Didenko
Keyword(s):  
Performance Improvement ◽  
Experimental Studies ◽  
Production Costs ◽  
Floating Point ◽  
Computing Device ◽  
Quartus Ii ◽  
Functional Blocks ◽  
Mental Testing ◽  
Processor Cores ◽  
Floating Point Numbers

The purpose of these studies is to develop an effective structure and internal functional blocks of a digital computing device – an adder, that performs addition and subtraction operations on floating- point numbers presented in IEEE Std 754TM-2008 format. To improve the characteristics of the adder, the circuit uses conveying, that is, division into levels, each of which performs a specific action on numbers. This allows you to perform addition / subtraction operations on several numbers at the same time, which increas- es the performance of calculations, and also makes the adder suitable for use in modern synchronous cir- cuits. Each block of the conveyor structure of the adder on FPGA is synthesized as a separate project of a digital functional unit, and thus, the overall task is divided into separate subtasks, which facilitates experi- mental testing and phased debugging of the entire device. Experimental studies were performed using EDA Quartus II. The developed circuit was modeled on FPGAs of the Stratix III and Cyclone III family. An ana- logue of the developed circuit was a functionally similar device from Altera. A comparative analysis is made and reasoned conclusions are drawn that the performance improvement is achieved due to the conveyor structure of the adder. Implementation of arithmetic over the floating-point numbers on programmable logic integrated cir- cuits, in particular on FPGA, has such advantages as flexibility of use and low production costs, and also provides the opportunity to solve problems for which there are no ready-made solutions in the form of stand- ard devices presented on the market. The developed adder has a wide scope, since most modern computing devices need to process floating-point numbers. The proposed conveyor model of the adder is quite simple to implement on the FPGA and can be an alternative to using built-in multipliers and processor cores in cases where the complex functionality of these devices is redundant for a specific task.

ZONGULDAK İLİNDE İHRACAT YAPAN FİRMALARIN İHRACATTA KARŞILAŞTIKLARI SORUNLAR

2014 ◽  
Vol 1 (3) ◽  
pp. 249
Author(s):  
Ramazan Aksoy ◽  
Canan Yıldıran
Keyword(s):  
Production Costs ◽  
International Competition ◽  
Face To Face ◽  
Chamber Of Commerce ◽  
Statistical Program

In this study, it is subjected to define what kind of export problems come up for the company exporting in Zonguldak. It is interviewed with 35 exporter companies recorded in Turkey Exporters Assembly and Chamber of Commerce and Industry. Prepared questionnaire form’s data are analyzed with SPSS 15 statistical program as the results of the activity which is performed through face to face meetings with company’s executives. As the result of the analysis, it is defined that exporter companies face big problems in production costs as for carrying, storing and distribution and international competition conditions. As the result of the activities, we see that there is a relevance regarding whether there is an exporter department in the companies and regarding being a proactive and reactive exporter.

PENGARUH KADAR PROTEIN DAN LEMAK PAKAN TERHADAP PERTUMBUHAN DAN KOMPOSISI BADAN IKAN KERAPU MACAN, Epinephelus fuscoguttatus

2016 ◽  
Vol 5 (2) ◽  
pp. 277
Author(s):  
Usman Usman ◽  
Neltje Nobertine Palinggi ◽  
Kamaruddin Kamaruddin ◽  
Makmur Makmur ◽  
Rachmansyah Rachmansyah
Keyword(s):  
Lipid Content ◽  
Lipid Level ◽  
Block Design ◽  
High Growth ◽  
Biological Variables ◽  
Randomized Block Design ◽  
Tiger Grouper ◽  
Test Fish ◽  
Net Cages ◽  
Protein Diets

Penelitian ini dilakukan untuk mendapatkan informasi tentang kebutuhan optimum kadar protein dan lemak pakan terhadap pertumbuhan dan komposisi badan ikan kerapu macan ukuran konsumsi. Sembilan pakan uji dibuat dalam bentuk moist pelet dengan tiga dosis protein (46%, 49%, dan 52%) dan tiga dosis lemak (9%, 11%, dan 13%). Ikan uji dipelihara dalam 27 keramba jaring apung ukuran 1 m x 1 m x 2 m selama 140 hari, diberi pakan uji secara satiasi dua kali sehari dan diset dalam rancangan acak kelompok pola faktorial berdasarkan kelompok ukuran bobot awal ikan yaitu (i) 122,0±4,2 g; (ii) 144,0±7,1 g; dan (iii) 172,9±10,5 g. Hasil penelitian menunjukkan bahwa laju pertumbuhan spesifik dan sintasan ikan relatif sama (>0,05) di antara perlakuan. Efisiensi pakan cenderung meningkat dengan meningkatnya kadar protein dan lemak pakan. Tingkat efisiensi pemanfaatan protein cenderung menurun dengan meningkatnya kadar protein pakan, tetapi meningkat dengan meningkatnya kadar lemak pakan. Hasil analisis proksimat badan ikan menunjukkan bahwa kadar bahan kering dan lemak ikan relatif tidak dipengaruhi (P>0,05) oleh peningkatan kadar protein pakan, namun kadar bahan kering dan lemak ikan tersebut sedikit naik dengan meningkatnya kadar lemak pakan. Kadar protein dan abu ikan relatif tidak dipengaruhi oleh perubahan kadar protein dan lemak pakan. Berdasarkan hasil penelitian ini tampak bahwa pakan dengan kadar protein 49% dan lemak sekitar 11% mampu memberikan pertumbuhan dan komposisi badan ikan kerapu macan yang baik.This experiment was conducted to investigate the optimum dietary protein and lipid level for growth and body composition of tiger grouper. Nine dietary experiments were formulated to moist pellet contain three levels of protein (46%, 49%, and 52%) and three levels of lipid (9%, 11%, and 13%). The fish were fed twice daily to satiation for 140 days in twenty seven net cages of 1 m x 1 m x 2 m, were set up factorial randomized block design based on fish size group i.e. (i) 122.0±4.2 g, (ii) 144.0±7.1 g, and (iii) 172.9±10.5 g. The results shown that specific growth rate and survival rate were not significant different (P>0.05) for all treatments. Feed efficiency increased when protein and lipid content increased. Protein efficiency decreased when protein diets increased and increased when lipid diets increased. No interaction occurred between protein and lipid content to all observable biological variables. Dry matter and lipid content of test fish were not affected by protein diets increase but by lipid diet content. Protein and ash of test fish were not affected by either protein or lipid contained in diet. To assure high growth rates and high quality of fish product, it is suggested to feed tiger grouper with diet containing 49% protein and 11% lipid. 

Sign in / Sign up

Export Citation Format

Share Document