Abstract
The rapid coagulation of fish blood makes the use of anticoagulants in hematological analysis necessary and means that choosing the most appropriate product is important. The aim of the present study was to evaluate the effect of two different anticoagulants (heparin sodium and K2EDTA), storage time, and temperature on the hematological values of Arapaima gigas juveniles. Twelve juveniles (905.79 ± 111.2 g and 49 ± 1.74 cm) kept in captivity were used for the tests. Blood was collected from the caudal vein and divided for the analysis of the effects of K2EDTA 10% and heparin sodium 5000 IU, storage time (0, 5, 10, and 24 h), and temperature (4 and 28 °C). The hematocrit, erythrocyte count, hemoglobin, mean corpuscular volume (MCV), mean corpuscular hemoglobin concentration (MCHC), mean corpuscular hemoglobin (MCH), and differential leukocyte count were evaluated. The results revealed significant differences in the hematocrit, lymphocytes, and neutrophils when the anticoagulants were compared at 0 h of storage. In the hematocrit, heparin sodium produced variations, while K2EDTA maintained the values constant at 5 h, the erythrocyte count constant for up to 24 h, with the exception of at 4 °C, while hemoglobin produced variations in all the groups at 5 h. The blood indices MCV, MCHC, and MCH were best preserved, without variations, using K2EDTA at 28 °C for up to 5 h. In conclusion, K2EDTA 10% at 28 °C maintained constant hematological values of Arapaima gigas for 5 h, with the exception of hemoglobin, which should be analyzed as soon as possible.
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The present study was funded by the project “Reproductive and nutritional study to increase the yield of aquaculture production in Loreto” (41-2016) of the Instituto de Investigaciones de la Amazonia Peruana (IIAP).
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by APGF, FIMP, KAHQ, IYSC, and JLVR. The first draft of the manuscript was written by CFM, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Experimental procedures with animals were carried out in accordance with Peruvian legislation for animal protection and welfare in compliance with the protocol of the ethics committee for the use of animals in acts of experimentation, research, and teaching (30407/2016).
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Gonzales-Flores, A.P., Mejia Perez, F.I., Huanuiri Quinteros, K.A. et al. Effect of heparin and EDTA as anticoagulants on hematological values in farmed juvenile of Arapaima gigas. Aquacult Int 30, 263–271 (2022). https://doi.org/10.1007/s10499-021-00796-1
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DOI: https://doi.org/10.1007/s10499-021-00796-1