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3.4.2. Studying of a state of health of commodity fishes in conditions astayotichnogo and constant termorezhnmov in UZV.

З.4.2.1. Hematological indicators.

Hematological indicators of the catfishes who have been grown up in the conditions of different thermomodes, were within norm and there corresponded to indicators prakyoticheski healthy catfishes (tab.

28).

Table 28

Results of hematological researches klarievyh the catfishes who have been grown up at different termorezhnmah

Variants Length

Sm

Mass

g

N,

g %

SOE,

Mm/ch

Erythrocytes

Thousand/mkl

Leucocytes

Thousand/mkl

1 362 580 8,60,3 8,70,2 182020 805
2 351,2 600 8,70,3 8,03 160019,5 1204,6

The note: 1 bunch of the catfishes who have been grown up at astatichnom a thermomode;

2 bunch of the catfishes who have been grown up at a constant thermomode.

Apparently from the data resulted in table 28, hematological indicators of the fishes who have been grown up at astatichnom a thermomode, even were better under the maintenance of erythrocytes (above on 12 %) and leucocytes (more low on 30 %) in comparison with those some the fishes who have been grown up at constant termoyorezhime that testifies to more congenial given mode vyyorashchivanija a commodity catfish.

3.4.2.2. Studying of a sensibility of catfishes to parasites.

In the scientific literature it is known, that klarievyj the catfish in natural usyolovijah is practically free from patogenov (95). In the conditions of artificial cultivation of fish are exposed to stress that can relax them rezistentyonost and raise a sensibility to patogenam. So, at molodi catfishes (Clarias fuocus) 3 sm in the conditions of artificial cultivation have been revealed by length aeromonoz, invoked by bacteria A. lwoffi, led to a considerable withdrawal of fishes (128).

For sensibility check klarievogo a catfish to infestation paraziyotami in the conditions of artificial cultivation experiment has been put. In landlocked pool in capacity 250л, catfishes in mass 600г, soyoderzhashchiesja have been planted earlier at astatichnom (skilled bunch) and constant (konyotrolnaja bunch) thermomodes. In this pool the gold small fishes infested with helminths of sort Dactylogyrus have been placed in a mesh corf. Contact of catfishes to infested fishes proceeded within 3 weeks. Then both catfishes, and gold small fishes have been subjected parazitologicheskomu and gemayotologicheskomu to research. Results of experiment are presented in tabyolitsah 29, 30.

Table 29

Results parazitologicheskih researches klarievyh catfishes, you - rashchennyh at different termorezhnmah

Variants

Experience

Length of fish, sm Mass,

g

Infection rate gelyomintami Dactylogyrus sp Withdrawal in %
AI EI
1 362 580 ed, 25 % 0
2 351,2 600 ed, 30 % 10

The note: Variants of bunches klarievyh catfishes - 1 grown up at astatich - nom a thermomode (24-30С); 2 - grown up at a constant thermomode (27С).

And. I. - intensity invazii - ekz/fish, E. And extensiveness inyovazii in %.

Apparently from table 29, klarievye the catfishes who have been grown up at different thermomodes, had no essential distinctions on indicators zarazhennoyosti helminths of sort Dactylogyrus. The sensibility to parasites was neyoznachitelnoj at catfishes of both bunches.

The carried out analysis of hematological indicators of the catfishes who infested and have been not infested with helminths of sort Dactylogyrus, has revealed defined razyolichija (tab. 30). Infested fishes had the level lowered on 12 % geyomoglobina and indicator SOE increased in 2 time. Hematological pokayozateli the gold fishes considerably infested with helminths, had sushchestyovennye the deflections testifying about kompensatornoj their reaction orgayonizma on influence patogenov, expressed in augmentation of indicators geyomoglobina, erythrocytes and monotsitov.

Table ZO

Influence of infection rate by parasites on hematological indicators of fishes

\ Indicators.

Names ryo\

DliYO

On

Fishes,

Sm

MasYO

sa,

g

ZarazhenYO

nost

parazi

tami

Hb,

r %

SOE,

Mm/ch

Ernt -

PO -

TSITY

THOUSAND

/mkl

LejYO

Which

tsity

tys/

mkl

LejkotsitarYOnaja the formula (In %)
Lima

fo -

tsi -

You

monoyo

tsity

Klarievyj a catfish (ibaziroyovannyj) 38

1

600 Dactylogyrus er.do 10экз. 7,9

0,05

12,5

3,7

1620 140 95 5
Klarievyj

Catfish

34,6

yo

0.7

580 Are not infested 8,9

0,2

6,6

1,2

1832

10S

864,1 99 1
Gold small fish Dactylogyrus

$р. AI> 60экз.

9,8 13 2360 On 70 30

Thus, ekologo-physiological researches of objects ryyobovodstva, containing in artificial conditions, have allowed to estimate soyostojanie health of fishes and to establish the causes of trouble separate ekzemyopljarov. At maintenance of fishes with optimum ecological conditions (maintenances and feedings) their physiological indicators estimated by birth, corresponded standard, that has been shown on klarievyh soyomah. Hematological indicators of the catfishes containing at different termoyorezhimah (astatichnom and constant) were within norm. The revealed distinctions testified to more congenial conditions at astatichyonom a thermomode. The sensibility klarievyh the catfishes who have been grown up at different thermomodes, to parasites (helminths of sort Dactylogynis) has appeared insignificant. In the presence of originators of diseases at klarievyh catfishes insignificant hematological changes have been revealed. At karpovyh

Fishes (gold small fish), which infestation was intensive (over 60 copies on fish), patogeny invoked essential deflections of indicators of blood, in particular in the leukocytic formula that testified to intensifying kompensatornoj reactions of their organism. The carried out researches have shown,

That for successful cultivation klarievogo a catfish in artificial conditions

At various thermomodes it is necessary to provide optimum usloyovija maintenances (hydrochemical and sanitarko-bacteriological rezhiyomy), and also to avoid their joint maintenance with the fish infested parayozitami.

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A source: Kovalyov Konstantin Viktorovich. Technological aspects of growing catfish (Clarias gariepinus) in a hatchery with closed-loop water supply (UZV). Thesis for the degree of candidate of agricultural sciences. Moscow - 2006.

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