Haematological Characterization of a Neotropical Fish, Corydoras paleatus (Pisces, Callichthyidae), Captured from Pristine and Polluted Water

CAZENAVE, J.; WUNDERLIN, D. A.; HUED, A. C.; ÁNGELES BISTONI, M.A.

HYDROBIOLOGIA

Kluwer Academic Publishers.

Año: 2005 vol. 537 p. 25 - 33

0018-8158

We report normal ranges of haematological indices in healthy Corydoras paleatus from an unpollutedCorydoras paleatus from an unpolluted 14 area. Haematological parameters studied include: erythrocyte counts (Er), haematocrit (Ht), haemoglobinarea. Haematological parameters studied include: erythrocyte counts (Er), haematocrit (Ht), haemoglobin 15 concentration (Hb), mean cell volume (MCV), mean cell haemoglobin (MCH) and mean cell haemo-concentration (Hb), mean cell volume (MCV), mean cell haemoglobin (MCH) and mean cell haemo- 16 globin concentration (MCHC). Normal red blood parameters did not change according to maturationglobin concentration (MCHC). Normal red blood parameters did not change according to maturation 17 stages, sex or seasons. Then, we compared them with those coming from fish captured in a site pollutedstages, sex or seasons. Then, we compared them with those coming from fish captured in a site polluted 18 by sewage. Fish exposed to pollution presented significantly higher values of Er, Ht, Hb, MCH andby sewage. Fish exposed to pollution presented significantly higher values of Er, Ht, Hb, MCH and 19 MCHC than those captured in an unpolluted area. Discriminant analysis showed that Hb is a keyMCHC than those captured in an unpolluted area. Discriminant analysis showed that Hb is a key 20 parameter to point out differences between populations exposed to different environmental conditions.parameter to point out differences between populations exposed to different environmental conditions. 21 We suggest that haematological values of C. paleatus, registered during this study, could be used asWe suggest that haematological values of C. paleatus, registered during this study, could be used as 22 biomarkers in future works evaluating the incidence of environmental stress on fish as well as pointingbiomarkers in future works evaluating the incidence of environmental stress on fish as well as pointing 23 out changes in the water quality.out changes in the water quality.