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Effect of four rearing water temperatures on some performance parameters of larval and juvenile crucian carp, Carassius carassius , under controlled conditions
Author(s) -
Sikorska Justyna,
Kondera Elżbieta,
Kamiński Rafał,
Ługowska Katarzyna,
Witeska Małgorzata,
Wolnicki Jacek
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13855
Subject(s) - crucian carp , biology , juvenile , zoology , larva , carassius auratus , carp , fish <actinopterygii> , fishery , ecology
Abstract The performance of larvae and juveniles of the crucian carp, Carassius carassius , held at temperatures of 22, 25, 28 and 31°C was evaluated in terms of growth, survival and, only in juveniles, haematological indices. The best growth in both larvae and juveniles was recorded at 28°C (relative growth rate (RGR) of 27.52% and 3.50%/day, respectively). The highest final survival rates were found at temperatures of 25–28°C, exceeding 99% in larvae and equal to 100% in juveniles. Haematopoietic activity and leucocyte count were significantly disturbed at temperatures of 28 and 31°C. These temperatures were stressing to the juveniles, as shown by the lymphopaenia and neutrophilia found in their peripheral blood and haematopoietic kidney. Thus, the optimum temperature for growth of larval and juvenile crucian carp is close to 28°C. However, stress indicators found at this temperature in juvenile fish strongly suggest that the most favourable temperature range for long‐term rearing is below 28°C and near to 25°C.