Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates
Body length and weight are key parameters measured to provide information about the growth and condition of larval, juvenile, and adult fishes from both the wild and aquaculture. The goal of this study was to evaluate the effects of preservation in formalin and alcohol on juvenile rainbow trout, Onc...
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Sciendo
2024-12-01
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| Series: | Fisheries & Aquatic Life |
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| Online Access: | https://doi.org/10.2478/aopf-2024-0019 |
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| author | Greszkiewicz Martyna Fey Dariusz P. |
| author_facet | Greszkiewicz Martyna Fey Dariusz P. |
| author_sort | Greszkiewicz Martyna |
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| description | Body length and weight are key parameters measured to provide information about the growth and condition of larval, juvenile, and adult fishes from both the wild and aquaculture. The goal of this study was to evaluate the effects of preservation in formalin and alcohol on juvenile rainbow trout, Oncorhynchus mykiss (Walbaum) standard body length (SL) and weight changes. Standard length (19.43–32.98 mm SL) decreased after 60 days of preservation by an average of 2.98% in 96% alcohol and 2.26% in 10% formalin. In contrast, fish body weight (0.094–0.63 g) decreased in alcohol (31.22%) but increased in formalin (11.65%). These percentage values can be used as correction factors, with the exception of fish body weight in alcohol since the size of individuals affected the magnitude of change. Accordingly, a correction formula accounting for fish weight must be applied (fresh weight (g) = -0.0363 + 1.667 × preserved length). Changes in fish length and body weight in different preservatives resulted in significant differences in the Fulton condition factor, with underestimation in alcohol (fresh F = 1.58; preserved F = 1.20) and overestimation in formalin (fresh F = 1.60; preserved F = 1.92). |
| format | Article |
| id | doaj-art-516ca872aa194da789749cdb50594197 |
| institution | Kabale University |
| issn | 2545-059X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Sciendo |
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| series | Fisheries & Aquatic Life |
| spelling | doaj-art-516ca872aa194da789749cdb505941972025-02-10T13:25:25ZengSciendoFisheries & Aquatic Life2545-059X2024-12-0132421822610.2478/aopf-2024-0019Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimatesGreszkiewicz Martyna0Fey Dariusz P.11National Marine Fisheries Research Institute, Department of Fisheries Oceanography and Marine Ecology, ul. Kołłątaja 1, 81-332, Gdynia, Poland1National Marine Fisheries Research Institute, Department of Fisheries Oceanography and Marine Ecology, ul. Kołłątaja 1, 81-332, Gdynia, PolandBody length and weight are key parameters measured to provide information about the growth and condition of larval, juvenile, and adult fishes from both the wild and aquaculture. The goal of this study was to evaluate the effects of preservation in formalin and alcohol on juvenile rainbow trout, Oncorhynchus mykiss (Walbaum) standard body length (SL) and weight changes. Standard length (19.43–32.98 mm SL) decreased after 60 days of preservation by an average of 2.98% in 96% alcohol and 2.26% in 10% formalin. In contrast, fish body weight (0.094–0.63 g) decreased in alcohol (31.22%) but increased in formalin (11.65%). These percentage values can be used as correction factors, with the exception of fish body weight in alcohol since the size of individuals affected the magnitude of change. Accordingly, a correction formula accounting for fish weight must be applied (fresh weight (g) = -0.0363 + 1.667 × preserved length). Changes in fish length and body weight in different preservatives resulted in significant differences in the Fulton condition factor, with underestimation in alcohol (fresh F = 1.58; preserved F = 1.20) and overestimation in formalin (fresh F = 1.60; preserved F = 1.92).https://doi.org/10.2478/aopf-2024-0019preservationsample storageshrinkagesize measurements |
| spellingShingle | Greszkiewicz Martyna Fey Dariusz P. Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates Fisheries & Aquatic Life preservation sample storage shrinkage size measurements |
| title | Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates |
| title_full | Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates |
| title_fullStr | Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates |
| title_full_unstemmed | Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates |
| title_short | Effects of preserving juvenile rainbow trout (Oncorhynchus mykiss) in formalin and alcohol on body length, mass, and condition factor estimates |
| title_sort | effects of preserving juvenile rainbow trout oncorhynchus mykiss in formalin and alcohol on body length mass and condition factor estimates |
| topic | preservation sample storage shrinkage size measurements |
| url | https://doi.org/10.2478/aopf-2024-0019 |
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