Trout Production Research Articles

Somatic coliphages as bioindicators of contamination in Lake Guamuez, Colombia

Lake Guamuez is the second largest lake in Colombia and economically supports hundreds of families in the area. The main activities carried out in the region have focused on tourism, agriculture, livestock, and rainbow trout production; however, these activities have been associated with contamination of the lake. This research aimed to evaluate the water quality of Lake Guamuez using somatic coliphages (SCs) as bioindicators. For this purpose, periodic sampling was carried out for six months at 9 strategic points of the lake. For the detection of SCs, the method described in 9211 D of the Standard Methods for the Examination of Water and Wastewater was used. The genomic variability and presence of virulence genes in the isolated SCs were determined. Water contamination in the lake is evident, and the SCs titer is greater in areas with a high flow of anthropogenic activities. An important degree of genetic diversity and a high prevalence of virulence genes could be observed among the SCs analyzed. The results when compared with guidelines and water quality standards from various countries, showed concentrations of SCs higher than those allowed. The high prevalence of gastrointestinal diseases in the region suggests a link to water contamination.

Impact of Average Atmospheric Temperature on Rainbow Trout Production in South Africa: A Time Series Analysis Approach

Climate change has various effects on the global food supply and the environment as a whole. Similarly, the production of fish like Rainbow Trout is affected by variation in the atmospheric temperature higher than 21oC, leading to fluctuations in yield. Therefore, this study sought to investigate the impact of average atmospheric temperature on Rainbow Trout production in South Africa using time series data spanning from 2000 to 2022. The unit root test, Johannsen cointegration test, and the Vector Error Correction model were employed to analyse the data. The results show that the change in average atmospheric temperature affects the production of Rainbow Trout. The correlation between average temperature and Rainbow Trout production is positive in the short-run and long-run. I Prolonged exposure to high temperature may lead to fish stress, migration and increased susceptibility to diseases which ultimately affects the economic viability of the sector in both the short-run and the long-run. In addition, the overall change in the atmospheric temperature has a negative effect on the production of the fish highlighting the need for climate change intervention to sustain fish production. The study recommends implementing strategies that reduce the impact of temperature changes on fish production to support both economic growth and food security.

The application of Global Burden of Animal Diseases methodology to aquatic animal production.

The Global Burden of Animal Diseases (GBADs) programme's key objective â€" to provide a systematic approach to determine the burden of animal disease â€" is as relevant to aquatic as to terrestrial animal production systems. However, to date GBADs methods have mainly been applied to terrestrial animal production systems. The challenges in applying GBADs methods, notably the Animal Health Loss Envelope (AHLE), vary considerably by production system. The authors demonstrate how the AHLE can be calculated for rainbow trout production in England and Wales and acknowledge that its application to other systems (e.g. hatchery production, polyculture and no-feed mollusc production) is more complex. For example, in small scale tropical fish production the impact of suboptimal nutrition on production would need to be addressed. Recirculating aquaculture systems have inherent high levels of biosecurity and disease control, and thus low levels of disease. Removing the capital and running costs associated with biosecurity fundamentally changes the system and invalidates the AHLE calculation. Lack of data from many systems, notably small-scale tropical finfish farming, means that expert opinion will be needed to support the application of GBADs methods. While calculation of the AHLE is the focus of this article, it should be noted that attribution to causes and value chain modelling are needed to generate data on the wider societal impact of aquatic animal diseases (and possible interventions), which governments require to support decision-making about resource allocation.

Innovative structure to mount demand feeders to concrete raceways at a production fish hatchery

AbstractObjectiveAs a type of automatic feeder, demand feeders reduce labor costs and can improve fish‐rearing efficiencies. However, mounting demand feeders can be problematic because of the variety of nonstandardized fish‐rearing units. This article describes an innovative, simple, sturdy, and durable demand feeder mount for rectangular, concrete raceways.MethodsThe feeder mount was made from aluminum and sits flat on a raceway wall or walkway. A horizontal base plate, secured to the wall by vertical plates, holds a vertical riser of aluminum tubing. Attached to this tubing is a rod that secures the demand feeder.ResultThis feeder mount design has proven durable over several years of actual use. Over this time, it has needed no maintenance other than occasional cleaning with water to remove spilled fish food. The feeder can be easily and quickly removed from the mount by simply pulling a pin and sliding the feeder off of the tubing. The mount is constructed to dramatically reduce tripping hazards and occupational safety and health risks.ConclusionThis simple, inexpensive (~US$50 to construct), and no‐maintenance mount is a viable solution to the typically difficult problem of mounting demand feeders to concrete raceways used for trout production.

Towards circularity in aquaculture systems: Environmental impact of Hermetia illucens meal inclusion in diets for rainbow trout reared in aquaponics

In advancing towards more sustainable aquaculture, the inclusion of insect meals in aquafeeds has significant potential to increase circularity and reduce environmental impacts, especially in aquaponics. Nevertheless, there is a lack of information regarding the environmental performance of these innovative feeding and management solutions. This study assessed the environmental impact associated with the dietary inclusion of Hermetia illucens (HI) meal (0%, 6% and 12%) in diets for rainbow trout (Oncorhynchus mykiss) reared in a low-tech aquaponic system characterised by nine independent experimental units (6.06 kg/m3 of fish and 14 strawberry plants per unit). A cradle-to-gate attributional life cycle assessment model was used to consider the impacts related to the whole aquaponic system (AQ-FISH) and those only related to the production and use of the aquafeed (AQ-FEED). The impact categories were 100-year global warming (kg CO2-eq) – with (GWP_LUC) and without (GWP) the emissions associated with land-use change (LUC), acidification (AP, g SO2-eq) and eutrophication (EP, g PO4-eq) potentials, cumulative energy demand (CED, MJ), land occupation (LO, m2/y) and water scarcity (WS, m3-eq). The functional unit was a 1 kg live weight increase of rainbow trout. Data originated from a previous 76-d fish performance trial. Data regarding HI meal were derived from an interview with the manufacturer. An economic method was used to partition the impacts between HI meal, HI fat and the frass (exhausted substrate). The effect of the HI meal inclusion level on the AQ-FISH and AQ-FEED impact values was tested using one-way analysis of variance.A 1 kg live weight increase of rainbow trout reared in the aquaponic system (AQ-FISH) produced 15.6 kg CO2-eq (GWP), 18.3 kg CO2-eq (GWP_LUC), 67 SO2-eq and 55 g PO4-eq and used 354 MJ, 3.5 m2/y and 311 m3-eq. The dietary inclusion of HI meal did not affect the AQ-FISH results, except for CED (+2%–5%). When considering the impact resulting from feed production (AQ-FEED), the inclusion of HI meal did not affect GWP_LUC, AP, EP and LO, but it negatively affected GWP (+13%–26%) and CED (+34%–68%). Results from AQ-FISH and AQ-FEED scenarios showed low sensitivity to the methodological choices. Overall, our findings suggest that general improvements to reduce the environmental impact associated with rainbow trout production in aquaponics should be concurrently directed towards both the system setting and management, as well as towards the HI meal production process, with a particular emphasis on enhancing energy efficiency. To minimise potential trade-offs, especially from an environmental perspective, future studies should prioritise the investigation of energy use and greenhouse gas emission associated with feed production. This requires a thorough evaluation of all changes in the diet formulation resulting from the inclusion of a new ingredient.

A long-term study of the impact of the invasive species Eurasian minnow Phoxinus phoxinus on brown trout Salmo trutta production in a high mountain lake, Southern Norway

The shallow Lake Skjerja was originally one of the most outstanding brown trout lakes on the Hardangervidda mountain plateau. During the period 1973–1985, the annual yield was on average 3.35 kg ha-1. In the mid-1980s, Eurasian minnow established a dense population in the lake. Since 1994, 5304 kg of Eurasian minnow have been removed with baited traps, which correspond to an annual mean catch of 177 kg year-1 or 1.12 kg ha-1. The competition for food, in addition to longer food chains, has had a strong negative impact on the brown trout production, with an annual yield reduced to 1.07 kg ha-1, or 32% of the historical catches (1973-1985). The total removed biomass of the two fish species correspond to 65% of the brown trout yield before the invasion of the Eurasian minnow. In Lake Skjerja, the two crustacean species Gammarus lacustris and Lepidurus arcticus, have historically been staple food items for brown trout. Fishing with baited traps on the minnows, and the presence of a large fraction of predatory brown trout, may have reduced the predation pressure on the two crustacean species, and they are still a part ofthe brown trout diet. The availability of fish as food has resulted in a significant increase in the presence of large individuals of brown trout with maximum weights above four kg. Despite reduced annual yield of brown trout, Lake Skjerja is still a popular fish destination with nearly 200 big-sized brown trout (mean annual weight 1065 grams) landed annually. On Hardangervidda, an increase in air temperature has been observed since the 1980s, with a corresponding change in water temperature which may benefit Eurasian minnow. In warm summers, water temperature approaches 14°C which has proved to be near to the upper thermal threshold for Lepidurus arcticus.

Determination of water characteristics of trout farms for organic farming in Feke

Organic aquaculture represents a comprehensive approach to farm management and food production. It integrates the best environmental practices, promotes biodiversity conservation, preserves natural resources, and places a strong emphasis on ensuring the well-being of the fish, all in alignment with the preferences of discerning consumers. In this study, water quality and suitability of two different trout production enterprises in Feke/Adana city in Turkey for organic fish culture was investigated. The water quality parameters evaluated include temperature, dissolved oxygen, pH, Ca, Mg, Na, K, alkalinity, nitrate nitrogen, nitrite nitrogen, ammonium nitrogen, orthophosphate phosphorus, and alkalinity. It is seen that the head waters have a high water quality standard in terms of all their physical and chemical properties.

Assessing the environmental impacts of conventional and organic scenarios of rainbow trout farming in France

In France, rainbow trout farming in conventional flow-through systems raises environmental concerns. To address this, there is a growing interest in organic aquaculture. In this study, we employed an attributional life cycle assessment (LCA) to analyze the environmental impacts of rainbow trout production, comparing conventional and organic practices in a model fish farm. Our life cycle impact assessment revealed that organic farming significantly reduced environmental impacts per tonne of trout in seven of the nine selected impact categories. Notably, freshwater ecotoxicity exhibited the most significant difference, with organic systems showing a 35% decrease. The only exceptions were freshwater eutrophication and water dependence, where organic production led to higher impacts per tonne of trout. In conventional farming, emissions amounted to 14 kg of P eq./tonne, whereas in organic farming, the emissions were slightly higher (15 kg of P eq./tonne). For water dependence, one tonne of trout production in the conventional system mobilized 128 103 m3 vs. 185 103 m3 in the organic system. The environmental benefits of organic production were even more marked when using a surface-based functional unit (m2y). We demonstrated the benefits of organic trout production from an environmental perspective. However, our findings highlight the caution needed when interpreting LCA comparisons of such production systems that can be highly influenced by methodological choices such as the functional unit used.

The emission intensity of the freshwater aquaculture production value chain in Georgia

This contribution assesses the greenhouse gas (GHG) emission intensity among two freshwater aquaculture sub-chains: both the carp and catfish and the trout and sturgeon sub-chains in Georgia. The data were derived from 155 semi-structured interviews conducted in Georgia in 2021. The GHG per kilogram of production and per Georgian Lari (GEL) of value added of specific farm types were calculated. Emission intensity per kg of production is similar for both sub-chains, while value-added differs more significantly. Our results show the existence of economies of scale in trout production due to the ability of larger farms to use less feed per kilogram of fish. From this perspective, increasing the production scale can lead to lower emission intensity and improved economic performance. In the case of the carp sub-chain, economies of scale are not present. Therefore, we recommend conducting research on increasing the scale of production through the use of larger ponds. This solution brings obvious economic benefits, but from an environmental point of view, it may pose certain threats. Moreover, the countereffects of scaling production, such as wild fish depletion, water pollution, and the spreading of fish diseases and the farmed fish escaping, must also be adequately addressed.

A new approach in rainbow trout (Oncorhynchus mykiss Walbaum, 1792) industry: "Turkish Salmon" production and marketing trends

With favorable environmental conditions and the adoption of new technologies, Türkiye has 1703 enterprises producing trout as of 2022. These enterprises collectively produce 167,286 tons of trout per year, including portioned fish (200-250 g), fillet candidates (400-600 g), and fillets (known as Turkish Salmon) (>3000 g). The production chain for Turkish Salmon involves hatcheries, dam lake net cage systems, and offshore net cage systems. There are 680 hatcheries producing trout eggs and fry, with a total annual production of 1,360,029,485 eggs. Additionally, 622 pond/dam lake net cage systems are used for producing Turkish Salmon candidates weighing 400-600 g, with a total production capacity of 163,525,079 kg per year. Offshore net cage systems in the Black Sea region, spread across six provinces, are utilized for Turkish Salmon production. Production planning is underway for two provinces, with a total planned production area of 15,650,000 m2 and a projected capacity of 221,188,000 kg per year. Türkiye is actively involved in the global aquaculture sector, paying close attention to its advancements. Türkiye has a strong egg/juvenile production capacity compared to other countries involved in trout production globally. However, the importation of biotechnology-applied and observed eggs continues, posing biological and genetic risks to Türkiye's natural aquatic areas. Over the past 20 years, Türkiye's trout production has grown significantly, reaching 167,286 tons per year, marking it as a significant food production industry. This success can be attributed to favorable environmental conditions, increasing consumer demand, the adoption of new technologies, and consistent investments. However, the rapid growth in the trout farming sector over the past five years has led to an uncontrollable decline in survival rates. This decline can be attributed to the spread of diseases, incorrect treatment methods, improper breeding management practices, flawed business management, unregulated fish transport, and compromised sanitary and environmental conditions.

Integrated alternative approaches to select feed-efficient rainbow trout families to enhance the plant protein utilization

Improving feed utilization efficiency is a challenge in aquaculture. Therefore, we developed an indirect benchmark to use in selecting trout for improved efficiency of feed utilization on plant protein (soy)-based diets, with the long-term goal of reducing the cost of commercial trout production. We used a four-part integrative approach to identify feed efficient individuals among 1595 fish coming from 12 genetically selected families by establishing the phenotypic relationship between feed conversion ratio (FCR) and body weight variations using compensatory feeding regimes. Additionally, we examined the nutritional composition of fish filet for each efficiency phenotype during the compensatory regimen. Our findings showed that the fish with the lowest weight loss during a feed deprivation period and the highest weight gain during the refeeding period (FD−/RF +) demonstrated the lowest FCR (FCR = 0.99) and consisted of individuals from several lines. This finding confirms the possibility of improving feed efficiency in mixed lines. Although feeding period has an effect on nutritional composition of fillet, such selection criteria did not show an effect on groups. Overall, successful selection for the improvement of feed efficiency will have a broad application to commercial fish selective breeding programs, leading to increased aquaculture sustainability in the long run.

Effect of dietary starch, amylase and ash on nutrient digestibility, faecal waste production and faecal characteristics of rainbow trout, (Oncorhynchus mykiss).

Waste management is a critical issue in aquaculture. In this study, we examined nutrient digestibility, faecal waste production, faecal removal efficiency and the faecal characteristics of rainbow trout (Oncorhynchus mykiss) in response to the dietary starch level, amylase and ash supplementation and the interaction of dietary starch with amylase and ash. A basal mixture predominantly consisting of plant-based ingredients was formulated. The basal mixture was diluted with 100, 200, 300 and 400 g/kg gelatinised wheat flour, resulting in four diets of varying starch levels, referred to as 10-WF, 20-WF, 30-WF and 40-WF, respectively. Amylase was supplemented at 125 k-novo-α-amylase units (KNU)/kg to the 20-WF and 40-WF diets and referred to them as 20-WFα and 40-WFα. Two high ash diets were prepared by supplementing 20 g diamol/kg to the 10-WF and 30-WF diets and termed as 10-WFA and 30-WFA. Triplicate group of 25 fish (mean weight, 210 g) were restrictively fed one of the eight diets for five weeks. Higher dietary starch level led to increased faecal waste production, lowered faecal removal efficiency and resulted in greater accumulation of non-removed faeces in the system. Moreover, higher dietary starch level also diminished faecal stability, as evident by an increased share of particles <40 μm size in 40-WF upon exposure to mechanical stress. Amylase supplementation in the diet enhanced starch digestibility without influencing faecal waste production, removal efficiency, or the particle size distribution (PSD) of non-stressed faeces. Conversely, dietary ash supplementation increased faecal waste production and altered faecal characteristics by enhancing density and sinking velocity, although without improving its removal efficiency. In summary, this study underscores the potential of dietary manipulations to affect faecal waste production, removal efficiency, and various faecal characteristics, including viscosity, density, sinking velocity, particle size distribution, and stability.

Supply chain analysis of coral trout (Plectropomus leopardus) in simeulue regency: case study of production value and contribution of PiSiSi MPA

Coral Trout (Plectropomus leopardus) is a species of grouper that is highly valued and the main commodity in Simeulue Regency. This research aims to identify the supply chain, calculate the value of fisheries production and the percentage of production of Coral Trout (Plectropomus leopardus) in the PiSiSi Simeulue MPA. It is hoped that the benefit of this research will be market literacy so that it can be used as consideration for management policies and optimization of fisheries marketing in Simeulue Regency. The research was carried out in March-April 2023 through interviews, field surveys and collecting data on purchases/sales of Coral Trout from collectors. The results of the research show that there is a production value of Coral Trout that is different for each buyer in Simeulue Regency. The production value generated by buyers (collectors) was IDR 1,293,195,632 with a total weight of 10.23 tons. The fisheries sector in the PiSiSi MPA contributes to Coral Trout fish production of 41.47% or IDR. 536.3 million in 2022. Based on this research, Coral Trout fish is sold to local communities, processing coMPAnies and exporters in Belawan, North Sumatra and Jakarta.

Quality and risk management in aquaculture: a case study of trout production in the “Slupia Valley” landscape park

Quality and risk management in aquaculture: a case study of trout production in the “Slupia Valley” landscape park

Trout Production in District Ganderbal – An Analysis of Economic Challenges

The present study carried during the year 2022-23, worked on the impact of the introduction of genetically improved strains of rainbow trout on the economy of the fish farmers, in comparison to the normal strains. The economy of 40 farmers in groups of 20 Normal stock (NS) and Genetically Improved Stock (GIS) each was conducted and interviewed using a pre-tested questionnaire. The investigation showed that fixed capital investment on sample farm was Rs.1.25 lakh per raceway in both the set ups. The major share of investment was for the construction of raceway, which accounted for 68.53% of total investment on sample farms. The share of total variable cost was 58.37% in NS and 48.50 in GIS per cent and fixed cost was 41.62 in NS and 51.49 in GIS group. Feed was the major cost component accounting for about 46.43 per cent of the total cost in NS, while as it was reduced to 37.15% in GIS, thereby encouraging as a key factor in deciding profitability of trout farming. Resource use efficiency showed that feed was overutilized while labor was under-utilized in NS, while as it was optimally utilized in GIS group. The returns to scale in trout production of 1.25 indicates increasing returns to scale in trout production. High price of feed and seed are found to be the major constraints in trout culture. The B-C ratio worked out to be 1.37 in NS group and 1.87 in GIS group, indicating the economic feasibility of trout farming in the Kashmir valley, and better economic profile of farmers farming GIS strain.

Physicochemical characterization and presence of heavy metals in the trout farming area of Lake Titicaca, Peru

&lt;p&gt;Certain areas of Lake Titicaca exhibit signs of contamination from urban drainage, mining tailings, and waste from trout cage farming. The objective of this study was to determine the physicochemical conditions of the water and the concentration of heavy metals in sediments of a trout (&lt;em&gt;Oncorhynchus mykiss&lt;/em&gt;) farming area in Puno Bay, Lake Titicaca. Water samples were collected at depths of 1, 5, 10, and 15 meters from the surface, as well as from sediments at the bottom of the lake. Additionally, samples were taken 500 meters from the trout breeding area, where no farming activities took place. The study was carried out over a period of 10 months. Some physical-chemical measurements were taken in situ using a multiparametric device, while others were carried out at IMARPE’s laboratory. The results indicate that the physical-chemical quality of the water does not exceed the tolerance limits recommended by the Environmental Quality Standards - ECA Peru. The water pH was 8.79 and the dissolved oxygen was 6.81. The heavy metals (Hg, Cd, Pb, Zn, Cu) found in the sediments were within the permissible limits compared to the ISQG Canada Standard. However, the concentration of As, at 41 mg kg&lt;sup&gt;-1&lt;/sup&gt;, exceeded the tolerance limit. Uncontrolled trends in trout production volumes could compromise water quality and sustainability.&lt;/p&gt;

Türkiye'de Alabalık Üretimi, Fiyatı ve Sübvansiyon Arasındaki Nedensel İlişkinin Araştırılması

Although there have been trout subsidies in Türkiye for many years, the fact that trout production has been below expectations, especially in recent years, has led to the need to investigate the effects of the subsidies. Thus, the present study was conducted to estimate the long-run relationship among trout production, producer price, and subsidy in Türkiye. The time-series data covering 1984-2016 regarding trout production, sales prices, and subsidies were used. The Vector Error Correction Model (VECM) and Granger Causality Analysis were utilized to estimate the time-dependent causality relationship among the variables. The VECM results, which estimate the existence of a long-run relationship among the variables, revealed that 46.8% of the long-run deviations in the price and subsidy variables will be corrected in the next period. The analysis results indicated that sales prices affect trout production negatively in the long term. Granger causality analysis indicated that the prior period values of production and price variables were the reason for the changes in the subsidy variable. In the short-term VECM model, it was revealed that changes in production and prices positively affect the subsidy. A percent increase in production and price increased the subsidy amount by 1.79 and 3.14 percent, respectively. To increase trout production, the current subsidy policy should be revised to improve the infrastructure and capacity of aquaculture farms. Subsidies for the fishery sector should also be increased in real terms to achieve their objectives.

Состояние экосистемы озера Хедо (западная Карелия) в условиях рыбоводной деятельности

The article highlights the analyzes of the ecosystem of Lake Khedo (Republic of Karelia) under conditions of growing anthropogenic load caused by using the lake for breeding trout in fish cages based on the proper and literature data. Comparative analysis of hydrochemical data before the operation of the farm (until 2005) and after showed a twofold increase in water color (70-150°), which indicates an increased content of organic pollutants (humus, peat, silt). Also in the reservoir there are increased nitrogen and phosphorus compounds. Previously, the concentration of total phosphorus did not exceed 0.01 mg/l, today it reaches 0.02 mg/l. The main factor contributing to the satisfactory state of Lake Khedo is the high water flow rate, due to which most biogens are flown outside the lake. The data on the main hydrobiological indicators of the lake (phytozooplankton and zoobenthos) are presented. It has been stated that if earlier the reservoir corresponded to the mesohumous oligotrophic type, at present it reaches the initial level of mesotrophy, which is probably facilitated by the long-term cage cultivation of the aquaculture object. In terms of the abundance of organisms of the initial trophic levels, the reservoir corresponds to α-mesotrophic type. The lake is inhabited by 8 species of fish, and the valuable ones include whitefish Coregonus lavaretus (L.) and vendace Coregonus albula (L.). The results of the research made it possible to clarify the total production of commercial trout, which amounted to 300 tons per year and doesn’t exceed the total biogenic load. Recommendations on timing the regular ecological expertise of the lake and the adjustment of production volumes are given

Nodular gill disease in Northeastern Italy: An investigation on the prevalence of the disease and the risks of introduction in rainbow trout farms.

Nodular Gill Disease (NGD) is an emerging pathogenic condition that causes gill damage and mainly affects farmed freshwater fish, rainbow trout (Oncorhynchus mykiss) in particular, and this inevitably generates noticeable economic losses for the industry. The present study aimed to assess the prevalence of NGD in the Autonomous Province of Trento, a highly productive area located in Northeastern Italy, traditionally suited to rainbow trout production, and to identify possible risk factors for the introduction of this disease in trout farms. The necessary data were obtained through a questionnaire and the collection of fish samples. According to the data analysis, 42% of the investigated farms tested positive for NGD. The two possible risk factors identified for its introduction in farms are the presence of other diseases in the same farm (OR = 17.5; 95% CI = 2.7; 111.5) and having farms located 5 km upstream (OR = 24.8; 95% CI = 2.9; 211.1). These results highlight (i) a possible impairment of the immune system caused by other diseases as a predisposing factor to the manifestation of the pathology and (ii) the role of water in spreading pathogens.

Influence of economic profitability in the production and commercialization of trout (Oncorhynchus mikiss) in the district of Congalla

The research was carried out in the Congalla district between April and September 2018 and focused on analyzing the production and economic profitability of trout (Oncorhynchus mykiss) farming by the local market. The production areas, profitability, supply, demand and forms of consumption were determined; in local and regional market; As a primary source of information, it was obtained through interviews with trout producers, traders and consumers in (Congalla-Angaraes) in the main markets of each province, likewise; Secondary information was collected, such as historical production of the last 10 years, quantity of production, and yield per well. It was concluded that the main trout producing areas in the Congalla district for the year 2018 were "improved valley" fish farms, with 48. 000 trout produced, the other fish farms produce less and therefore the largest suppliers of trout in the Congalla district is the "Valle mejorada" fish farm (2017 - 2018). The total amount of trout and its commercialization produced at the Congalla district level from 2007 to 2018, were also determined from the Angaraes Agrarian Agency (AGA) and from the surveys carried out during 2018. Its production was around 126,000 kg trout. Another reality that could be verified is that trout breeding is currently being developed; but the technical assistance of professionals has not achieved major advances in recent years. The other fish farms produce less and therefore the largest suppliers of trout in the Congalla district is the "Valle mejorada" fish farm (2017 - 2018). The total amount of trout and its commercialization produced at the Congalla district level from 2007 to 2018, were also determined from the Angaraes Agrarian Agency (AGA) and from the surveys carried out during 2018. Its production was around 126,000 kg trout. Another reality that could be verified is that trout breeding is currently being developed; but the technical assistance of professionals has not achieved major advances in recent years. The other fish farms produce less and therefore the largest suppliers of trout in the Congalla district is the "Valle mejorada" fish farm (2017 - 2018). The total amount of trout and its commercialization produced at the Congalla district level from 2007 to 2018, were also determined from the Angaraes Agrarian Agency (AGA) and from the surveys carried out during 2018. Its production was around 126,000 kg trout. Another reality that could be verified is that trout breeding is currently being developed; but the technical assistance of professionals has not achieved major advances in recent years. They were also determined from the Angaraes Agrarian Agency (AGA) and from the surveys carried out during the year 2018. Its production was around 126,000 kg of trout. Another reality that could be verified is that trout breeding is currently being developed; but the technical assistance of professionals has not achieved major advances in recent years. They were also determined from the Angaraes Agrarian Agency (AGA) and from the surveys carried out during the year 2018. Its production was around 126,000 kg of trout. Another reality that could be verified is that trout breeding is currently being developed; but the technical assistance of professionals has not achieved major advances in recent years.