|
KMID : 0894520110150020077
|
|
Development & Reproduction
2011 Volume.15 No. 2 p.77 ~ p.85
|
|
|
Influence of Density and Feeding Frequency on Early Life History and Cannibalism of River Puffer, Takifugu obscurus
|
|
Kang Duk-Young
Kim Hyo-Chan
Kang Hee-Woong
|
|
|
Abstract
|
|
|
|
To investigate the influence of density and feeding frequency (food amount) on growth, cannibal dynamics and survival of puffer Takifugu obscurus (TL mm, BW g) during early life history, we conducted one experiment composed with 6 density groups set up as 1.43 inds./, 2.14 inds./, 2.86 inds./, 3.57 inds./, 4.29 inds./ and 7.14 inds./. The experiment was triplicately performed in 1 ton FRP tank for 30 days. Daily food intake (DFI), feed efficiency (FE), growth, cannibal frequency, and survival rates were examined. Although not find any significant relation of density to DFI and FE, we found that growth decreased significantly with the increasing of density under 3.57 inds./, but significantly increased with the increasing of density over 4.29 inds./. Cannibal frequency and daily mortality rate was significantly increased with increasing density and decreasing feeding frequency, inducing the most poor survival rate in the highest density group and low feeding frequency. Therefore, we concluded that the density and the feeding frequencies affect sibling cannibal dynamics and survival of puffer stock.
|
|
|
KEYWORD
|
|
|
Density, Feeding frequency, Takifugu obscurus, Early life history, Cannibalism
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|