Effects of stocking density and presence or absence of soil base on growth, weight variation, survival and body composition of pearlspot, Etroplus suratensis (Bloch) fingerlings

被引：14
作者：
Biswas, Gouranga [1 ,3 ]
Ghoshal, Tapas K. [1 ]
Natarajan, Maruthamuthu [2 ]
Thirunavukkarasu, Arunachalam R. [2 ]
Sundaray, Jitendra K. [1 ]
Kailasam, Muniyandi [2 ]
De, Debasis [1 ]
Sukumaran, Krishna [2 ]
Kumar, Prem [2 ]
Ponniah, Alphis G. [2 ]
机构：
[1] Cent Inst Brackishwater Aquaculture ICAR, Kakdwip Res Ctr, Kakdwip, W Bengal, India
[2] Cent Inst Brackishwater Aquaculture ICAR, Madras, Tamil Nadu, India
[3] Miyazaki Univ, Fac Agr, Miyazaki 8892192, Japan
来源：
AQUACULTURE RESEARCH | 2013年 / 44卷 / 08期
关键词：
stocking density; soil base; growth; survival; pearlspot; fingerlings rearing; CATFISH HETEROBRANCHUS-LONGIFILIS; AFRICAN CATFISH; CLARIAS-GARIEPINUS; FOOD-INTAKE; SKIN COLOR; PERFORMANCE; WELFARE; JUVENILES; HAMILTON; CULTURE;
D O I：
10.1111/j.1365-2109.2012.03132.x
中图分类号：
S9 [水产、渔业];
学科分类号：
0908 ;
摘要：
With the objective to develop an indoor tank seed rearing system for pearlspot (Etroplus suratensis), effects of three stocking densities in presence or absence of soil base were evaluated on growth, weight variation, survival and body composition in a 60-day trial. The experiment had a 3x2 factorial design with three levels of stocking density (150, 300 and 450 fishm(-3)) and two levels of soil base (with and without) in triplicates. Pearlspot fry (27.5 +/- 0.5mm/0.39 +/- 0.02g) were stocked in experimental tanks (LengthxBreadthxHeight: 0.65x0.50x0.48m) and fed with a formulated diet containing 29.85% crude protein. Increasing the stocking density from 150 to 450 fishm(-3) significantly decreased the growth (average body weight and total length), daily weight gain, specific growth rate and survival (P<0.001) and increased the feed conversion ratio (P<0.01). Significantly lower growth and survival were observed in treatment having soil base compared with that of without soil base (P<0.001). However, coefficients of variation at harvest weight and body composition of fingerlings were independent to stocking density and presence or absence of soil base (P>0.05). A significant positive interaction effect of stocking density and presence or absence of soil base was observed on average body weight (P<0.05) and survival (P<0.001) of pearlspot fingerlings. This study suggests that stocking density of 150 fishm(-3) without soil base in tanks would be appropriate for raising pearlspot fingerlings in brackishwater indoor seed rearing system.
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页码：1266 / 1276
页数：11
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