Research on morphological indexes and body composition change under starvation and excessive feeding situation for juvenile Pampus argenteus

doi:10.3969/j.issn.1001-909X.2015.04.010

Abstract

Abstract: In order to explore the influence on body weight, relative fatness, hepatosomatic index and body composition under starvation and excessive feeding for juvenile Pampus argenteus, the juveniles (2.61±0.65 g) were fed by starvation and experimental groups. The physical parameters of juveniles, relative fatness, hepatosomatic index and fish essential nutrients were investigated under the conditions of normal feeding group (C), hunger 5 days (S5), starvation 9 days (S9) and the excess feeding group (D). The results are as follows: (1) Compared with the normal feeding group, all indexes of the D group are significantly increased (p<0.05), and weight gain rates (73.89±9.78)% are two times more than those in the normal group, the hepatosomatic index and relative fatness are increased 55.00% and 25.10% respectively. (2) The hepotosomatic index and relative fatness are significantly decreased under starvation stress (p<0.05). After starvation of 5 days and 9 days, the hepotosomatic indexes decreased by 8.75% and 11.25%, and the relative fatness is decreased by 21.18% and 32.16%. (3) Crude fat of starvation juvenile P. argenteus has maximum loss, and it is only 22.10% and 18.10% of the normal group respectively after starvation of 5 days and 9 days. In the meantime, the crude protein losses are only 4.06% and 4.90%. It may explain that starvation juvenile P. argenteus use the fat as the main energy, and the protein and carbohydrates as the subsidiary energy. (4) In the death group resulting from starvation, the relative fatness is no significant difference (p>0.05) in different body length groups, but the rates of weight loss are affected by body length. The loss rates are 22.89% in 2.20~2.80 cm group and increased to 35.79%~40.28% in 2.80~3.40 cm group. The relative fatness is substantially decreased with body length increasing. Body length and hunger resistance ability of juvenile P. argenteus are positively correlated.

Key words: Pampus argenteus, starvation, relative fatness, hepotosomatic index, body composition

CLC Number:

S965.331

WANG Teng-fei, GUO Xiao-ge, GU Jiang-wen, YAN Xue-mei, XU Shan-liang. Research on morphological indexes and body composition change under starvation and excessive feeding situation for juvenile Pampus argenteus[J]. Journal of Marine Sciences, 2015, 33(4): 83-89.

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