THE EFFECT OF ALTERNATING TEMPERATURE ON VERTEBRAL COUNT IN THE MEDAKA (ORYZIAS LATIPES)

1965 ◽  
Vol 43 (1) ◽  
pp. 99-104 ◽  
Author(s):  
C. C. Lindsey ◽  
M. Y. Ali

Eggs reared at different sustained temperatures ranging from 20° to 34 °C produced young with vertebral counts progressively lower at higher temperatures. Eggs transferred from 20° to 30° 2 days after fertilization produced significantly fewer vertebrae, and eggs transferred 6 days after fertilization produced significantly more vertebrae than did those reared at either sustained temperature. Eggs subject to temperatures alternating between 22° and 30° every 12 hours throughout development produced intermediate counts, corresponding to those resulting from sustained rearing at 26°, and showed the highest survival and no abnormalities.

1971 ◽  
Vol 28 (9) ◽  
pp. 1235-1240 ◽  
Author(s):  
C. C. Lindsey ◽  
M. Y. Ali

In each of two sets of experiments, two female medaka, Oryzias latipes, that laid different-size eggs were crossed reciprocally with two males. Vertebral counts of the offspring differed significantly between batches, but there was no consistent correlation between egg size and vertebral count. Both the highest and lowest counts resulted from crosses with females laying large eggs. Other experiments are reviewed, and it is concluded that within the same race of fish there is no causal connection between vertebral number and egg size, although between different races or related species large adult size is often correlated with high vertebral count. The possible advantages of variation in vertebral number are discussed.


2003 ◽  
Vol 31 (1) ◽  
pp. 88-91 ◽  
Author(s):  
William E. Hawkins ◽  
William W. Walker ◽  
John W. Fournie ◽  
C. Steve Manning ◽  
Rena M. Krol

2013 ◽  
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Author(s):  
Jian-Zhong LI ◽  
Qiong LIU ◽  
De-Shou WANG ◽  
Lin-Yan ZHOU ◽  
Fumie SAKAI ◽  
...  

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Author(s):  
Hiroshi Ishibashi ◽  
Masaya Uchida ◽  
Masashi Hirano ◽  
Taka Hayashi ◽  
Ryoko Yamamoto ◽  
...  

2012 ◽  
Vol 11 (3) ◽  
pp. 2200-2246 ◽  
Author(s):  
Z.L. Yao ◽  
H. Wang ◽  
L. Chen ◽  
K. Zhou ◽  
C.Q. Ying ◽  
...  

1998 ◽  
Vol 15 (1) ◽  
pp. 123-126 ◽  
Author(s):  
Hironori Wada ◽  
Atsuko Shimada ◽  
Shoji Fukamachi ◽  
Kiyoshi Naruse ◽  
Akihiro Shima
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