scholarly journals Effects of Water Temperature and Estradiol-17β on the Sex Ratio and Growth of the Japanese Eel, Anguilla japonica

2013 ◽  
Vol 23 (12) ◽  
pp. 1454-1459 ◽  
Author(s):  
Dae-Jung Kim ◽  
Nam-Sil Lee ◽  
Shin-Kown Kim ◽  
Bae-Ik Lee ◽  
Ki-Baik Seong ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Water Temperature ◽  
Anguilla Japonica ◽  
Japanese Eel ◽  
Estradiol 17Β

scholarly journals Regulation of water temperature, feeding frequency and larval stocking density leads to shorter duration of larval stage of Japanese eel Anguilla japonica

2013 ◽  
Vol 79 (2) ◽  
pp. 198-205 ◽  
Author(s):  
YOSHITSUGU MASUDA ◽  
TADAO JINBO ◽  
HITOSHI IMAIZUMI ◽  
HIROSHI HASHIMOTO ◽  
KENTARO ODA ◽  
...  
Keyword(s):  
Water Temperature ◽  
Larval Stage ◽  
Stocking Density ◽  
Anguilla Japonica ◽  
Japanese Eel ◽  
Feeding Frequency

Effect of water temperature on embryonic development and hatching time of the Japanese eel Anguilla japonica

Aquaculture ◽  
2012 ◽  
Vol 330-333 ◽  
pp. 100-105 ◽  
Author(s):  
Hyojin Ahn ◽  
Yoshiaki Yamada ◽  
Akihiro Okamura ◽  
Noriyuki Horie ◽  
Naomi Mikawa ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Water Temperature ◽  
Anguilla Japonica ◽  
Japanese Eel ◽  
Effect Of Water ◽  
Hatching Time

scholarly journals The sex-ratio reversal of the Japanese eel Anguilla japonica in the Kaoping River of Taiwan: The effect of cultured eels and its implication

Aquaculture ◽  
2006 ◽  
Vol 261 (4) ◽  
pp. 1230-1238 ◽  
Author(s):  
Yu-Wei Chu ◽  
Yu-San Han ◽  
Chia-Hui Wang ◽  
Chen-Feng You ◽  
Wann-Nian Tzeng
Keyword(s):  
Sex Ratio ◽  
Anguilla Japonica ◽  
Japanese Eel

Effect of starvation, body size, and temperature on the onset of metamorphosis in Japanese eel (Anguilla japonica)

2012 ◽  
Vol 90 (12) ◽  
pp. 1378-1385 ◽  
Author(s):  
Akihiro Okamura ◽  
Yoshiaki Yamada ◽  
Naomi Mikawa ◽  
Noriyuki Horie ◽  
Katsumi Tsukamoto
Keyword(s):  
Body Size ◽  
Water Temperature ◽  
Critical Size ◽  
Anguilla Japonica ◽  
Japanese Eel ◽  
Efficient Production ◽  
High Plasticity ◽  
Total Length ◽  
Morphological Criteria ◽  
Wide Range

We assessed the effects of starvation, body size, and water temperature on the onset of metamorphosis in leptocephali of Japanese eel ( Anguilla japonica Temminck and Schlegel, 1846) as determined by the morphological criteria of proportion, preanal length, and body depth to total length. Leptocephali of mean total length 55.6 mm that had been reared in captivity for 241 days from hatching were divided into unfed (n = 28) and fed (n = 30) groups in triplicate and reared for an additional 2 weeks. The mean percentage of larvae starting metamorphosis within 2 weeks was significantly higher in the unfed than in the fed groups (70% vs. 28.6%), suggesting that food deprivation acted as a cue for metamorphosis. The critical size for metamorphosis was a total length of 50–55 mm; smaller larvae did not start metamorphosis even in the absence of food, whereas larvae reaching that critical size were induced to undergo metamorphosis by starvation. The start of metamorphosis under unfed conditions was independent of diel-varying water temperature (day 23 °C; night 21–29 °C), suggesting a high plasticity in response to a wide range of environmental temperatures. These findings suggest methods for the efficient production of glass eels, as well as new insights into the mechanism of eel metamorphosis.

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