The effect of sudden temperature decrease on common carp

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027162%3A_____%2F19%3AN0000168" target="_blank" >RIV/00027162:_____/19:N0000168 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The effect of sudden temperature decrease on common carp

Original language description

19th International Conference on Diseases of Fish and Shellfish, Porto - Portugal, 9th-12th September 2019 – poster. Introduction: One of the most important stress in fisheries is thermal stress caused by sudden temperature change leading to inability of keeping the homeostasis. The objective of the present study was assessment of stress caused by temperature decrease on common carp under experimental conditions. Methodology: Total of the 56 tested individuals of Cyprinus carpio (94.54 ± 27.99 g) were exposed to temperature 27.8°C (T1). After 14 days of acclimatization, 28 individuals were moved to the 16.8°C (T2); the rest was kept in the original water (T1). The water analysis together with the gaining of samples (n = 7) for haematological and biochemical analysis, biometrical data and analysis of digestive tract activity was performed after 6, 12, 24 and 48 hours for both tested groups. Results: Significance was found for weight of digestive tract and weight intestinal content between both temperature groups. For almost all fish in colder T2 water, the digestion was slowed and finished after 48 hours; however, in warmer T1 water, the intestine was empty already after 24 hours. Haematological findings showed the similar trend among T2 groups presented as decreased values for haematocrit, haemoglobin, erythrocytes and leucocytes count when compared to T1 water. The neutrophils to lymphocytes ratio was found to be higher among all samplings made in T2 groups. Observed biochemical parameters (ammonia, triglycerides, total protein and albumin) were decreased when fish were exposed to the colder T2 water; in opposite, lactate was increased in T2. Conclusion: The digestion process was slowed when fish were exposed to colder T2 water and the liquid constitution of digested feed in intestine was observed along with the visibly inflated intestine. Examined haematological and biochemical parameters were found to be decreased in T2. The lower ability of detoxification and excretion of endogenous ammonia was reported for T2 at 6 and 12 hours in conclusion to water analysis. However, the concentration of ammonia in fish plasma was at comparable levels in the same time interval for both tested groups.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

40301 - Veterinary science

Project

<a href="/en/project/EF16_019%2F0000869" target="_blank" >EF16_019/0000869: Sustainable production of healthy fish in various aquaculture systems - PROFISH</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů