HEMATOLOGICAL CHANGES IN SOME FARMING CYPRINIDS UNDER THE HIBERNATION CONDITIONS

C. MISĂILĂ, RADA ELENA MISĂILĂ, GIANINA COMĂNESCU, GABRIELA VASILE

Abstract


The study presents the hematological results of comparative determinations made before and after winter period (2006-2007 in one summer-old common carp, silver carp and bighead carp (C0+). Our previous researches (Misăilă et al., 2004) show that, hypothermia and high storage density induce in farming fish a winter chronic stress state. So, in the two summer-old common carp, silver carp and bighead carp evidenced a pronouncedly hematological insufficiency, with the diminution of hemoglobin level at the end of winter with 11-26% against those from the winter beginning, as well as diminution of the hematocryte with 18-20% and of the number of erythrocytes with 25-45%. Also, Bejerano (1984) point out the diminution of Hb level from 4.5 to 3.8 g/dl in tilapia after a rapid acclimatization to under-lethal temperatures. The results of these researches made in one summer-old cyprinid fries: common carp (Cyprinus carpio), silver carp (Hypophthalmichthys molitrix) and bighead carp (Aristichthys nobilis), subjected to the wintering density of 15 t/ha and in unusual gentle winters conditions (2006-2007) evidenced a different response, suggesting the absence of conditions of stress installation, through the hematological indices values. In addition, was observed a differentiate response of three species in the experimental mentioned conditions. Thus, in common carp, the average of obtained values in the end of the winter (March) were comparable with the one from November-December, differences registered being situate below 3% in the case of Hb concentration (g/dl), hematocryte (%) and number of erythrocyte (mil./μl) and below 5% in the case of MCH and MCHC values. In silver carp, differences are situate below 3% in the Hb case, number of erythrocytes and MCH and of 7-11% in the case of Ht, MCV and MCHC. In bighead carp, the values from the end of the winter are less than prehibernation period ones with 5% to Ht, 16% to MCH and 30% in the case of MCHC, respectively, bigger values than these with 11.5% (Hb), 20% (MCHC) and 37% (number of erythrocytes).


Keywords


social stress; thermal stress; farmed cyprinids

Full Text:

PDF

Refbacks

  • There are currently no refbacks.


Copyright (c)


Scientific Papers Animal Science and Biotechnologies publish open access articles under the terms of the Creative Commons Attribution 4.0 Licence (read full legal code).


LUCRARI STIINTIFICE ZOOTEHNIE SI BIOTEHNOLOGII (SCIENTIFIC PAPERS ANIMAL SCIENCE AND BIOTECHNOLOGIES)

ISSN print 1841 - 9364
ISSN online 2344 - 4576
ISSN-L  1841 - 9364
(former ISSN 1221-5287, E-ISSN 1841-9364)

PUBLISHER: AGROPRINT Timisoara, Romania
PAPER ACCESS: Full text articles available for free
FREQUENCY: Semiannual
PUBLICATION LANGUAGE: English
_________________________________________________________________

Banat´s University of Agricultural Sciences and Veterinary Medicine "King Michael I of Romania" from Timisoara
Bioengineering Faculty of Animal Resources
300645, Timişoara, Calea Aradului 119, Romania

E-mail: spasb [at] animalsci-tm.ro
Phone: +40-256-277160, Fax.: +40-256-277110