Changes In Blood Ion Levels And Mortality Rates In Different Sized Rainbow Trout (Oncorhychus Mykiss) Following Direct Transfer To Sea Water

Türker, Ali; Ergün, Sebahattin; Yiğit, Murat

doi:10.46989/001c.20360

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Due to the osmoregulation ability of rainbow trout, a member of the Pacific salmon genus (Oncorhynchus sp. ), the production strategy of growing the fish in fresh water facilities to a certain size, and transferring to brackish water conditions from 10 to 30 grams (Turker et al, 2004) has become widespread over time. It has been noted that rainbow trout can adapt to even higher saline waters such as 28‰ salinity without adverse effects on fish health (Buyukates et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Assessment of Initial Investment Strategies for Different Farm-Scale Scenarios with Economic Cost Analyses in Offshore Salmon Farming

Yigit

2024

Annals of Animal Science

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The simulation of investment strategies with different farm-scale scenarios has been evaluated for best management plan in cage farming business for the establishment of a salmon production with either full capacity – or progressive investment. Economical revenues were analyzed with business risk assessment based on operating-and fixed costs for each of the four scenarios. In the theoretical model projected for the stimulation of best management plans, structural elements for the construction of an offshore Turkish salmon farm in the Black Sea were designed and investment costs for an annual production capacity of 4,000 tons were re-scaled by 25, 50 and 75% reduction, corresponding to 3,000, 2,000 and 1,000 tons per year, respectively. Economic variables of operational costs were comparatively evaluated with the revenues and annual profit conditions by sales of harvested fish. The break-even points for all investment strategies with different farm-scale scenarios were remarkably lower (on average 302,574.7 kg/year) than the harvest yields from the farms (on average 3,702,857.1 kg/year). Based on break-even points and margin of safety (MOS over 85%), all farms gained net profits with low risks in the first year, whether the farm received full investment, or initiated business with reduced investment expenditures for a gradual and progressive expansion plan. Findings of this study exhibit useful indications for farm management in understanding conditions of a step-wise establishment of business plans for salmon farming in offshore conditions.

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Section: Discussionmentioning

confidence: 99%

Assessment of Initial Investment Strategies for Different Farm-Scale Scenarios with Economic Cost Analyses in Offshore Salmon Farming

Yigit

2024

Annals of Animal Science

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“…Cage farming in the Black Sea was initiated with rainbow trout production in early 1990s, when Yigit ( 1996 ) and Yigit and Aral ( 1999 ) achieved better growth performance in brackish water compared to the individuals raised in freshwater conditions. Turker et al ( 2004 ) focused on the osmoregulation ability of rainbow trout and underlined that the transfer of 10 to 30 g fish from freshwater facilities to the cage farms in the Black Sea could be a good move for better harvest gains that has become a new farm management strategy over time. Recently, Buyukates et al ( 2022 ) evidenced that rainbow trout could be acclimated to even higher saline waters with salinities up to 28 ‰ with no adverse impacts on fish welfare.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the economic performance of salmon farming in submerged and surface cages in the Black Sea

Yigit,

Ergün

et al. 2023

Aquacult Int

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The production period for salmon farming in the Black Sea comprises the winter period and is limited to seven months, due to high water temperatures during the summer time. As an alternative strategy, temporary cage submersion during the summer season might be a solution for salmon grow-out throughout the year. Therefore, this study was conducted for comparative evaluation of economic performance of submerged and surface cages, by analyzing structural costs and returns for Turkish salmon farming in the Black Sea. As a result of the temporary cage submersion strategy, economic profits increased by nearly 70%, granting higher values of financial indicators with increased net profit (685,652.5 $ year −1 ) and margin of safety (89.6%), compared to the traditional surface cage (397,058.5 $ year −1 net profit and 88.4% margin of safety). The “What-if” analysis showed that profits from both cage systems were sensitive to variations in sale price, and the simulation by 10% reduced export market value may decrease revenues, with less financial profit loss for the submerged cage over the surface once. Hence, temporary cage submersion seems to be an alternative farm management strategy with extended production cycle and higher profits for the sustainable development of Turkish salmon farming in the Black Sea.

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Temporal Variations in Hematological, Immunological and Serum Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss) Acclimated to High-Saline Water in the Northern Aegean Sea

Büyükateş

Kesbiç

Yiğit

et al. 2023

Annals of Animal Science

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The present study evaluated the health status of rainbow trout (30.24±5.34 g) acclimated to high-saline water (28‰). Among adaptation procedures, gradually-acclimated (for 48 h) fish showed best performance, which were then introduced to the offshore cage-farm for further monitoring of fish health in marine environment over a long-term period of 100 days, until harvest weight of 319.9±48.51 g. Fish health and welfare was evaluated by means of biochemical parameters (viscerasomatic index, hepatosomatic index, mesenteric fat index, and spleen somatic index), hematological parameters (serum glucose, triglyceride, cholesterol, total protein, albumin, globulin), and immune parameters (lysozyme, myeloperoxidase, respiratory burst and potential killing values). Gradual acclimation to high-saline water did not show any adverse effects on health parameters. No significant differences were found in biometric measures (P>0.05). However, a time-dependent increase was recorded in hematology markers (P<0.05) after seawater transfer, and the health status improved over long-term from March 7 to June 14, 2018. All serum biochemical markers, except the total protein showed significant alterations (P<0.05) in long-term but without detrimental influence by day-100. Therefore, it seems possible to expand trout farms from brackish water sites to higher saline environments up to 28‰ salinity, with no detrimental impacts on fish health, that in turns may significantly contribute to the extension of potential aquaculture sites to wider areas.

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Changes In Blood Ion Levels And Mortality Rates In Different Sized Rainbow Trout (Oncorhychus Mykiss) Following Direct Transfer To Sea Water

Cited by 3 publications

References 14 publications

Assessment of Initial Investment Strategies for Different Farm-Scale Scenarios with Economic Cost Analyses in Offshore Salmon Farming

Assessment of Initial Investment Strategies for Different Farm-Scale Scenarios with Economic Cost Analyses in Offshore Salmon Farming

Analysis of the economic performance of salmon farming in submerged and surface cages in the Black Sea

Temporal Variations in Hematological, Immunological and Serum Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss) Acclimated to High-Saline Water in the Northern Aegean Sea

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