fish studies

8/13/2019 fish studies

1/4

DISCUSSION

Energy is stored in the chemical structure of the complex molecules

of the food materials. The energy needs of fish are supplied by fats, carbohydrates

and proteins. The energy expended increases with increasing feeding level

(Brooby, 19!". #or rearing $a%or &ndian carp fingerlings in ponds 'ashmana et

al., (19)*" suggested that the feed to be provided in the first month be e+uivalent to

be body weight, and in the second and the third month twice those initial weight of

the fry stoced. en and -harabarthy (199" provided feeding e+uivalent to the

initial body weight of the fry stoced for three months.

/hingran (199", reported characteristics of the successful fish feed

include palatability, high conversion value abundant availability and low cost. The

choice of the food items for the experiments was based on these considerations.

The items are also valuable as there nutritive value is as close as possible to natural

food. &t should be noted that in the present investigation of the * plant and animal

feed, the Catla catlais having the food maximum preferenceAmaranthus spinosus

(*.!0 2.22 gm dry wt" , -hicen sin (*.30 2.22 gm dry wt" and minimum

preference towards Raphanus Sativus(.3* 2.22 gm dry wt" 4oat liver (0.39

2.220 gm dry wt".

68


2/4

everal authors have reported variations in energy budget of fish ,

due to +uality (5andian and 6auramab,193" and +uality of food (5andian and

$adhavan , 19)"7 8iveandandan et al ., 19 7 aniffa and 8enatachalam,

19*2 . &n the present investigation also, variation in energy budget of -atla catla

was noticed as a function of +uality food. $aximum feeding rate was (2.2*9

2.22* mg : gm :day" and (2.2* 2.22* mg : gm :day" -atla catla plant and animal

feedsAmaranthus spinosusand chicen sin. #eeding rate of -atla catla reported

in the present investigation is much lesser in the comparable with the previous

authors. #or instance, (5andian and 6raguraman, 193" reported (!* mg:gm:day"

feeding rate for Tilapia mossambica. ;ccording to 8iveandan et al., (19", the

feeding rate ofAnabassandensranged from ().3 to 39.3 mg:gm:day" ebastian 19*3,

reported 0. to !. mg:gm:day feeding rate for Cirrhiinus mirgalafed on different

typed of Molluscan flesh and labeo calbasu ranged from (1*.) to 121.!

mg:gm:day".

anifa and 8enatachalam (3221" reported absorption efficiency

ranging from )!


3/4

efficiency (9* ="L.rohitafed on 4oat liver and minimum conversion efficiency (!

>" fed on egg white.

8enatesh and hetty (19*", reported )2 of

absorption efficiency for the Catla catla fed on!drillaand Ceratoph!lam. ;ccording

to aniffa and venatachalam (19*2", the absorption was more in plant diet (*>"

when compared with the animal diet (!>". &n the present investigation, the

maximum and minimum efficiency (.03>, !.)3>" and (.29, .30>" for the

test fish fed onAmaranthus spinosus, Raphanus sativus, Chic"ens"in, #oat liver,and

were noticed. ;ccording to 6iclefs (190", absorption efficiency is largely

determined by the +uality of this diet.

aniffa to ?rupaucer (19)", there was no growth for the Catla catlafed

on plant food and he drew a conclusion that exclusively plant food must lead to

death of fish. &t is clear that not only feeding rate is 0


4/4

&n the present study, the experimental fish were fed with plant and animal

diets. The same methods of feeding have been reported by Brinda and ;ravindan

(199". The maximum absorption efficiency was found to be (9*.3>" and

91.9)>" when the common crap was fed with feed and dry feed respectively.

The present study investigation, the maximum feeding rate ( 2.2*92.22*

mg:g:day" for the fish Catla catla fed on Amaranthus spinosus , -hicen sin,

5atni, #leming,elvanayagam (3223" observed the maximum food consumed

(11.*!)2.21* gm dry wt" the test fish Ctenophar!ngodon idellafed onDaucus carrota.

The minimum food consumed (9.2.223) gm dry wt" fed on $rassica oleracea.

The present wor showed maximum food consumption and the food converted

(*.!0 2.22 gm dry wt" and (2.2.221 gm dry wt" respectively that the fish fed

onAmaranthus spinosusand -hicen sin.

$erlin Aayana, #leming, shanthi, irmala observed the maximum

consumption rate (2.222)3 2.2222 mg:gm:day", absorption rate (2.2212.2220

mg:gm:day" the test Ctenophar!ngodon idella fed%ichoniacrassipes.The present

investigation showed them maximum absorption efficiency (.03, .29>" and

maximum conversion efficiency (9.!, *.9>" the test fish Catla catla fed on

Amaranthus spinosusand -hicen sin.

71

Documents

fish studies