7045

• UCREFRP Catalog Number: 7045
• Author: Severson, S. H., H. M. Tyus and G. B. Haines
• Title: Evaluation of Feeds for Raising Razorback Sucker,
• USFW Year: 1992
• Copyright Material: YES

58

JOURNAL OF APPLIED AQUACULTURE

TABLE 1. Proximate analysis (%) of diets used to feed razorback sucker fry: B-
250, A-250, A-400, AP-l00, BioDry, SCSS.

Di~ts

B-250 A-250

A-400

AP-100 BioDry sess

composition

Protein

57.2

52.8

53.5

51.0

48.2 55.3

Fat

14.7

21.8

22.4

14.7

15.7 19.5

Moisture

1.9

1.8

1.7

4.2

8.6 4.9

Ash

11.6

10.8

10.3

10.7

9.9 10.4

Carbohydrates"

14.6

12.8

12.1

19.4

17.6 9.9

.. B~ difference: , Carbohydrates = 100% - (protein + fat +
moisture + ash)

l("~

to 3 I/minute. Water exchange in the new tubes was through a
screened bottom and four 48-mm circular holes cut in each tube.
Based on fish ,growth during Phase II, A-250 and SCSS were
chosen as the diets for Phase III. Fish fed A-250 during Phase II
were pooled, and a sample of 300 fish selected and their mean
weight determined (mean = 0.073 g, SD = 0.0087). These fish
were randomly divided into three lots of 100 fish each. Two of the
lots were kept on their original diet of BioKyowa-A (250 ....), and
the other lot was changed to diet SCSS. Fish fed SCSS during Phase
II were also pooled, and a sample of 200 fish was selected and the
fish's mean weight determined (mean = 0.038 g, SD = 0.0021).
These fish were randomly divided into two lots of 100 fish each.
One lot was kept on the original diet of SCSS and the other lot
switched to diet A-250.
This diet reversal was performed in order to more fully evaluate
the diets, i.e., would fish response be similar with reversed diets or
affected by prior .conditioning. A-250 was chosen for Phase III be-
cause of its superior performance, and the SCSS diet was chosen

I