scholarly journals Effect of Mechanical Vibrations During Transport Operations of Nilo Tilapia (Oreochromis niloticus)

2019 ◽  
Vol 11 (17) ◽  
pp. 295
Author(s):  
P. M. Rebouças ◽  
J. S. Almeida ◽  
W. I. S. Paula ◽  
R. S. Rocha ◽  
S. A. A. Almeida ◽  
...  
Keyword(s):  
Fish Farming ◽  
Mechanical Stimuli ◽  
Mechanical Vibrations ◽  
Average Value ◽  
Future Performance ◽  
Physical Injuries ◽  
Live Fish ◽  
Mechanical Shocks ◽  
Dirt Road ◽  
Asphalt Road

Oscillatory movements present in the transport of live fish may compromise the physiological stability and the future performance of the animals. Therefore, the objective of this research was to evaluate the effect of mechanical vibrations in the transport of Nile tilapia through vibration levels and shocks occurred in transport boxes previously installed in a truck. The research was carried out in a fish farming integrating company in the state of Ceará, Brazil, with the monitoring of 5 live fish loads. The transport truck used was of the open type, with capacity for five boxes of fiberglass with a useful volume of 2400 L, density of 236 kg m-3. The data were recorded through five dataloggers, to monitor the vibration level (m s-2) and the occurrence and amplitude of mechanical shocks on the roads. Hematological, metabolic and ionic responses of fish were evaluated as well as visual observations of physical injuries. The most intense shocks occurred with the truck between 60 and 80 km h-1, with vibrations 1.151 m s-2 in the transport box, as well as in the water 0.489 m s-2. Larger vibration levels occurred on the asphalt road, with an average value of 1.13 m s-2, while on the dirt road they registered an average of 0.57 m s-2. Vibratory and mechanical stimuli presented secondary responses to blood level stress with alterations in glycemia, hematocrit, hemoglobin and magnesium ions. Physical lesions with 34% severe and 21% moderate, showed an uncomfortable environmental condition to fish.

Results of experimental work on the application of the aquacrop rotation practice in fish ponds in Iraq

2021 ◽  
pp. 56-67
Author(s):  
Farhan Yasin Hamed Farhan Yasin Hamed ◽  
Lydia Mikhailovna Vasilyeva ◽  
Natalia Viktorovna Sudakova ◽  
Ali Attala Muheisin ◽  
Adelia Zakirovna Anokhina
Keyword(s):  
Crop Rotation ◽  
Production Efficiency ◽  
Crop Yields ◽  
Fish Farming ◽  
Fish Ponds ◽  
Average Value ◽  
Fish Breeding ◽  
Feed Costs ◽  
The Cost ◽  
Fish Productivity

The use of the crop rotation method in fish farming makes it possible to increase fish productivity and crop yields in ponds. In the countries of the Middle East, in recent years, the Aqua Crop rotation practice has been developing, in particular, the consistent cultivation of fish and rice in fish ponds, which allows eliminating the contradictions between these crops and increasing production efficiency. In Iraq, an experiment was carried out on the variable cultivation of rice and carp in fish ponds for four years, with the aim of introducing this practice into the country’s agriculture. Four ponds, each with an area of 7.5 hectares, were involved. The research was carried out in two variants: in experiment No.1 rice was grown in the first year, fish in the second, then rice again and in the fourth year — fish, in the second experiment, on the contrary, at the beginning of the fish, then rice, etc. The fish-breeding season lasted 9 months (March to November). Fish-breeding indicators were studied in detail: survival rate, feed costs, fish productivity, the results of rice cultivation were judged by yield. In addition, indicators of economic efficiency were determined according to a simplified scheme. The results indicate that, in general, fish-breeding indicators turned out to be higher when growing fish in ponds after rice, so fish productivity increased by almost 30% with an average value of 3.9 t/ha, feed costs decreased, while rice yield increased by 15–16% and averaged 3.6 t/ha. The best fish-breeding indicators were obtained in the second experiment after rice was grown in the ponds for two years. Economic calculations confirmed the advantages of using the aquacrop rotation practice, so in the second experiment the cost of marketable fish decreased by 10%, and the profitability increased by almost 30%.

scholarly journals ANALISIS USAHA IKAN HIAS AIR TAWAR DI KOTA JAMBI

2020 ◽  
Vol 3 (1) ◽  
pp. 25-37
Author(s):  
Dodi Hadisaputra ◽  
Ernawati ◽  
Suandi
Keyword(s):  
Qualitative Method ◽  
Large Scale ◽  
Fish Farming ◽  
Ornamental Fish ◽  
Small Scale ◽  
General Description ◽  
Average Value ◽  
A Value ◽  
Net Benefits ◽  
Business Cost

Ornamental fish is a fish that has a distinctive shape, color and character so as to create an aquarium atmosphere that supports spatial layout and is able to provide a peaceful atmosphere. The purpose of this study was to determine the description of ornamental fish business and analyze the feasibility of ornamental fish business in Jambi City. The qualitative method is used to describe descriptively the general description of the location of the study and the characteristics of ornamental fish farmers, while the quantitative method uses the Analysis of Income and Revenue of ornamental fish business, cost analysis, income analysis and cost balance (R/C Ratio), Net Benefits - Cost Ratios (Net B/C), and institutionally descriptive for the betta fish, guppy and botia ornamental fish business. Overall, the general description of ornamental fish farming business in Jambi City is conducted conventionally. The average R/C ratio of the Betta ornamental fish business is 2.60, guppy is 2.02 and botia is 1.22. The highest average NPV in the betta ornamental fish in the mid-scale farming business is Rp. 60,745,160.71, guppy on a large scale is Rp. 31,385,065.48, and botia on a large scale with a value of Rp. 78,034,144.35. Overall, this ornamental fish business has an NPV value of> 0. The ornamental fish business in Jambi City is feasible to run and develop, betta ornamental fish business on a small scale with an average B/C Ratio of 1.15 and medium with an average value of average 1.60, guppy on a small scale with an average value of 1.02, and botia on a medium scale with an average value of 1.00 and large with a value of an average of 1.22. Keywords: Ornamental Fish, Jambi City.

scholarly journals Entropy Based Classification of Road-Profiles

2010 ◽  
Author(s):  
S. C¸ag˘lar Bas¸lamıs¸lı ◽  
Selis O¨nel
Keyword(s):  
Nonlinear Damping ◽  
Operating Parameters ◽  
Vertical Acceleration ◽  
Vehicle Speed ◽  
Mean Square ◽  
The Road ◽  
Dirt Road ◽  
Asphalt Road ◽  
Acceleration Signals

In this study, the Shannon entropies of six different road-profiles ranging from “very good asphalt road” to “dirt road (terrain)” were calculated. Results indicate that each type of road has a well defined entropy value and that the entropies of roads ranging from “very good asphalt” to “dirt road (terrain)” lie on a nearly linear locus. A second approach presented in this paper consists in measuring the sprung mass vertical acceleration of a vehicle running over segments of roads of different qualities and calculating the entropies of the acceleration signals. This procedure has been applied to assess the influence of nonlinear damping and vehicle speed. It has been seen that it is possible to identify the type of the road surface through the calculation of entropy if the vehicle operating parameters are known. Finally, it is observed that the locus of entropy values is concave on the plot of acceleration entropy versus root mean square (RMS) acceleration.

scholarly journals THE STUDY OF THRESHOLDS OF PAIN SENSITIVITY OF ORAL MUCOSA TO MECHANICAL STIMULI

2018 ◽  
Vol 22 (1) ◽  
pp. 11-17
Author(s):  
A. S Arutyunov ◽  
S. S Pertsov ◽  
Sergey Aleksandrovich Muslov ◽  
Z. L Shanidze
Keyword(s):  
Oral Cavity ◽  
Mucous Membrane ◽  
Oral Mucosa ◽  
Pain Sensitivity ◽  
Mechanical Action ◽  
Mechanical Stimuli ◽  
Average Value ◽  
Dental Prostheses ◽  
The Subject ◽  
The Mathematical Model

Tactile and pain sensitivity of the oral mucosa has been the subject of study of a number of researchers. However, the numerical values of the thresholds of the excitation of the baro - and mechanoreceptors of the mucosa of the oral cavity not sufficiently detailed in the literature, experimental data is highly scattered, often presented without specifying the method of measurement or sections of the jaws, which were received. However, the authors note the unequal sensitivity of the mucous membrane in its different areas and its dependence on the presence or absence of a number of chronic diseases. Systematic study on the diagnosis of sensitivity associated with dental prostheses of the prosthetic bed tissues to pressure, virtually no. In this report the authors made some attempt to rectify this gap. It shows the numerical values of thresholds of pain sensitivity of the mucous membrane of the oral cavity of humans and animals by mechanical action on the basis of literary data and results of numerical analysis of the mathematical model “obturator maxillary prosthesis - mucosa the edges of the defect of the upper jaw”. The average value of the lower threshold of pain sensitivity was 20,72 g/m2 according to the data of different authors, and the upper limit was 63,82 g/m2.

scholarly journals PEMBERDAYAAN MASYARAKAT MELALUI PENYULUHAN KEWIRAUSAHAAN UNTUK MEMANFAATKAN SUMBER DAYA PERIKANAN DI DESA KAPUR KABUPATEN KUBU RAYA

2019 ◽  
Vol 15 (2) ◽  
pp. 1
Author(s):  
Fita Kurniasari ◽  
Koriyantika Koriyantika
Keyword(s):  
Economic Growth ◽  
Freshwater Fish ◽  
Fish Farming ◽  
Entrepreneurial Spirit ◽  
Live Fish ◽  
Aquaculture Products ◽  
Lack Of Knowledge

The abundance of freshwater fish farming in Desa Kapur is one of the potential resources of the villages. However, there are still problems with the processing of aquaculture products in Desa Kapur, namely the lack of knowledge of the community in utilizing the results of the cultivation. As a result, many farmers only sell live fish at uncompetitive prices. In addition, there is a need for society to have knowledge to market their products outside the Kapur Village. Therefore, it is necessary to cultivate aquaculture products to improve economic growth and a better entrepreneurial spirit. Thus it is expected to help improving the economy of the community and entrepreneurial spirit in Desa Kapur.

scholarly journals Normal and Tangential Drag Forces of Nylon Nets, Clean and with Fouling, in Fish Farming. An Experimental Study

Water ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 2238
Author(s):  
Yarko Niño ◽  
Kevin Vidal ◽  
Aldo Tamburrino ◽  
Luis Zamorano ◽  
Juan Felipe Beltrán ◽  
...  
Keyword(s):  
Reynolds Number ◽  
Drag Coefficient ◽  
Drag Force ◽  
Fish Farming ◽  
Operating Conditions ◽  
Relevant Parameter ◽  
Sea Lion ◽  
Drag Coefficients ◽  
Average Value ◽  
Drag Forces

Experiments in a laboratory tank have provided measurements of the normal and tangential drag forces exerted on flat nets for different flow conditions. From those forces, normal and tangential drag coefficients of the nets have been obtained as functions of the Reynolds number and the solidity index. The experiments used two types of nets employed in the operation of a cultivation center: the fish net and the sea lion net, for the clean situation and for real operating conditions, with fouling adhered to the nets. Polyethylene ropes were used to characterize the presence of fouling in the nets. The experiments were carried out to determine equations for the normal and tangential drag coefficients. For the normal drag coefficient, the equations are linear with the Reynolds number, and the coefficients of the equations are linear with the solidity index. The equations are not so accurate for the tangential drag coefficient. The Reynolds number is not a relevant parameter for this coefficient and neither is the solidity index for the fish net, but the coefficient grows slightly with it for single and double sea lion nets with fouling. The literature review on the drag forces of nets reports that the tangential drag force is around 30% of the normal drag force. This value is approximately an average value of the ratio for the sea lion net and is higher for the clean fish net in this article.

scholarly journals Genioglossal response to mechanical vibrations of the mandible and the submandibular muscles

2019 ◽  
Vol 127 (1) ◽  
pp. 11-21
Author(s):  
Ferhat Erdogan ◽  
Mesut Sahin
Keyword(s):  
Healthy Subjects ◽  
Primary Objective ◽  
Mechanical Stimuli ◽  
Upper Airways ◽  
Mechanical Vibrations ◽  
Reflex Pathways ◽  
Lower Jaw ◽  
Custom Made ◽  
Pharyngeal Muscles ◽  
Muscle Responses

The extrinsic tongue muscles are activated in coordination with pharyngeal muscles to dilate the airways as needed during breathing. The genioglossus (GG) activity is known to be modulated by several reflexes evoked via the mechanoreceptors of the upper airways. The primary objective of this paper was to investigate the effectiveness of activating these reflex pathways using mechanical stimulation of the mandible or the submandibular muscles. In eight healthy subjects, 3-s long, 5-mm vertical mechanical vibrations were delivered at 8 and 12 Hz to the lower jaw in a seated position, while the GG EMG was recorded using a custom-made sublingual electrode, along with the activity of the masseter (MS) and mylohyoid (MH). All three muscle activities were significantly higher during stimulation compared with the baseline ( P < 0.02), and the increase was larger at 12 Hz versus 8 Hz ( P < 0.02). All three muscle responses had components that synchronized with the mechanical stimuli, but those of MS were much more strongly phase-locked to the vibrational cycle. In 10 healthy subjects, we also applied mechanical vibrations to the submandibular muscles at three different stimulation intensities, while subjects were lying in a supine position. The GG activity increased significantly above the baseline ( P = 0.026) in 9 out of 10 subjects, and the elevated activity persisted after termination of the stimulus for a few seconds. The results demonstrate that GG muscle responses can be evoked with mechanical vibrations applied to the lower jaw or the submandibular muscles in healthy subjects during wakefulness. NEW & NOTEWORTHY The evoked responses observed in the genioglossus (GG) activity during mechanical vibrations of the lower jaw or the submandibular muscles may lead to therapeutic applications for improving the patency of airways during sleep. The presence of these GG reflexes may also explain a mechanism by which the vibrations produced during snoring can help the airways stay open in individuals who may otherwise have obstructed airways in sleep.

scholarly journals PARIWISATA BERBASIS MASYARAKAT UNTUK PENINGKATAN PENDAPATAN ASLI DAERAH KABUPATEN KEPULAUAN ANAMBAS

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tinnike Coster ◽  
Lala M Kolopaking ◽  
A. Faroby Falatehan
Keyword(s):  
Community Participation ◽  
Fish Farming ◽  
Community Empowerment ◽  
Public Infrastructure ◽  
Community Based ◽  
Marine Transportation ◽  
Recreational Facilities ◽  
Average Value ◽  
The Government ◽  
Tourism Community

ABSTRACTThere are several objectives in the study: (1) the potential of tourism and regions support that can meet the needs of the tourists, (2) the forms of community empowerment in the development of community-based tourism and (3) the strategy of the development of community-based tourism to increase local revenues. The potencies of  tourism supports that should be improved in the development of Anambas Archipelago tourism are the improvement of infrastructure, both public infrastructure and tourism infrastructure, such as marine transportation and recreational facilities of nautical tourism, which has an average value of 4.93 that means it should be more focused on its development. While the region that can meet the needs of travelers in the development of tourism is located in Siantan district that is in the first rank and becomes the only district in the hierarchy I that is 59.54. The forms of community participation or community empowerment in the development of community-based tourism are in the form of fish farming, the increase of regional typical crafts and foods with the value of 4.79 that is to be developed, and that these activities are usually done by Anambas Archipelago community so that it can be beneficially used and should be developed in order to participate in the development of community-based tourism to generate profits for the government it self in the form of local revenue.Keywords: Tourism, Community, Increase Local Revenues, Tourism  ABSTRAKPenelitian bertujuan untuk (1) menganalisis sarana prasarana pendukung pariwisata dan wilayah yang dapat memenuhi kebutuhan para wisatawan, (2) Menganalisis pemberdayaan masyarakat dalam pengembangan pariwisata berbasis masyarakat dan (3) Menyusun strategi pengembangan pembangunan pariwisata berbasis masyarakat untuk peningkatan pendapatan asli daerah. Sarana prasarana pendukung pariwisata yang harus ditingkat dalam pengembangan pembangunan pariwisata Kabupaten Kepulauan Anambas adalah peningkatan sarana prasarana umum maupun sarana prasarana bidang pariwisata yaitu transportasi laut dan sarana rekreasi wisata bahari yang memiliki nilai paling tinggi sebesar 4.93 artinya harus lebih difokuskan dalam pembangunannya. Sedangkan untuk wilayah yang dapat memenuhi kebutuhan wisatawan untuk pengembangan pembangunan pariwisata terletak di Kecamatan Siantan yang menempati ranking satu dan menjadi satu-satunya kecamatan yang berada di hierarki I sejumlah 59.54. Bentuk keikutsertaan masyarakat atau pemberdayaan masyarakat dalam pengembangan pembangunan pariwisata berbasis masyarakat yaitu pada pembudidayaan ikan, peningkatan kerajinan dan makanan khas daerah dengan nilai paling tinggi sebesar 4.79, merupakan aktifitas yang sering dilakukan masyarakat Kabupaten Kepulauan Anambas dimana hal tersebut dimanfaatkan dan harus dikembangkan dalam berpartisipasi untuk pengembangan pembangunan pariwisata berbasis masyarakat yang dapat menghasilkan keuntungan bagi pemerintah itu sendiri berupa pendapatan asli daerah.Kata kunci: Pariwisata, Masyarakat, Pendapatan Asli Daerah, Pariwisata

scholarly journals Hydraulic structures and devices works providing a non-contact technology for fish release, seining and transfer of fish cultivated in fish breeding complexes

2021 ◽  
Author(s):  
V. N. Shkura ◽  
◽  
A. V. Shevchenko ◽  
Keyword(s):  
Water Body ◽  
Fish Farming ◽  
Design Solution ◽  
Hydraulic Structures ◽  
Fish Processing ◽  
Planting Material ◽  
Fish Breeding ◽  
Live Fish ◽  
Fish Traps ◽  
Bottom Fish

Purpose: development of an outlet and fishing structures works, providing for fish release from fish-breeding reservoirs, their seining, transfer and inlet into feeding reservoirs using non-contact technology. Materials and methods. The basis of the research was the data of studying the applied technologies, structures and means of intra-complex fish transfer between fish-breeding facilities and during stocking of reservoirs. Results. When fish are cultivated in fish breeding complexes, it is necessary to transfer them from nursery reservoirs to wild or stocked objects for fish farming and their biological reclamation. When providing fish-breeding activities, fish are released from nursery reservoirs by means of water outlets, seined in fish-traps, transfered and released into a water body. The applied complexes of structures provide for a physical effect on fish, which leads to injury to a part of the fish planting material. To exclude this, design solutions for fish outlet and fish processing facilities and live fish containers operating in the complex, providing the release, seining, transfer and inlet of fish using non-contact technology with technical means are proposed. Conclusions. A layout and design solution for a unit of linearly spaced interconnected fish-breeding structures, including a bottom fish outlet and a container fish trap, providing, when they work together, release and seining fish fry cultivated in fish-breeding reservoirs, is proposed. The applied and proposed technological schemes of functioning of the complex of structures, devices and means for fish release from fish-breeding basins, their catching, transfer and admission to the feeding reservoir are presented. A constructive solution for a live fish container for non-contact fishing, movement and admission of fish stocking material into the reservoir to be stocked is proposed.

The distribution and density of ciliary tufts on the siphons of Anodonta cygnea (Mollusca: Bivalvia)

1990 ◽  
Vol 48 (3) ◽  
pp. 518-519
Author(s):  
Wen-lung Wu
Keyword(s):  
Osmium Tetroxide ◽  
Internal Surface ◽  
Mechanical Stimuli ◽  
Type Ii ◽  
Sensory Receptors ◽  
Anodonta Cygnea ◽  
Type Iv ◽  
Sem Study ◽  
Inhalant Siphon ◽  
Type V

The mantle of bivalves has come entirely to enclose the laterally compressed body and the mantle margin has assumed a variety of functions, one of the pricipal ones being sensory. Ciliary tufts, which are probably sensory, have been reported from the mantle and siphons of several bivalves1∽4. Certain regions of the mantle margin are likely to be more or less, sensitive to certain stimuli than others. The inhalant siphon is likely to be particularly sensitive to both chemical and mechanical stimuli, whereas the exhalant siphon will be less sensitive to both. The distribution and density of putative sensory receptors on the in-and ex-halant siphon is compared in this paper.The excised siphons were fixed in glutaraldehyde and osmium tetroxide, the whole procedure of SEM study is recorded in Wu's thesis.Type II cilia cover the tips of tentacles, 6.13um. Type IV and type V cilia are found on the surface of tentacles. Type IV cilia are occasionally present at the tips of tentacles, 8 um long. They are the commonest type on the surface of tentacles. Type VI cilia occor in the internal surface of the inhalant siphon, but are not found on the surface of tentacles, 6.7-10um long.

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