Population Discrimination by Strontium-calcium Concentration Ratios of Sagittal Otoliths Taken from the Japanese Flounder, Paralichthys olivaceus

1999 ◽  
Vol 09 (01n02) ◽  
pp. 11-19 ◽  
Author(s):  
I. KAKUTA ◽  
D. CHIBA ◽  
K. ISHII ◽  
H. YAMAZAKI ◽  
S. IWASAKI ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Calcium Concentration ◽  
Paralichthys Olivaceus ◽  
Japanese Flounder ◽  
Genetic Characteristics ◽  
X Ray ◽  
Population Discrimination ◽  
Significant Difference ◽  
Northern Regions ◽  
Concentration Ratios

For the purpose of obtaining basic data to understand the population dynamics of the Japanese flounder, Paralichthys olivaceus, inhabiting the Sanriku coastal waters, the concentration ratios of Ca and Sr in otoliths of juvenile fishes being cultivated for releasing to the regions, and those of adult fishes captured in both the Sanriku area (Aomori, Iwate and Miyagi) and Shizuoka prefecture coastal regions (as a comparison) were analysed using a particle induced X-ray emission (PIXE) technique. The Sr/Ca ratios of otoliths taken from juvenile Japanese flounders had significant differences between Sanriku and Shizuoka sea-farming groups. The differences in otolith Sr/Ca ratios between Sanriku and Shizuoka sea-farming stations would thus differentiate flounder populations. No significant difference in otolith Sr/Ca ratios was observed among the Sanriku group. However, the values for Aomori group formed by small fishes in the Sanriku group seemed to be lower in proportion to their body size. Therefore, genetic characteristics of the juvenile Japanese flounder being reared at the sea-farming stations in Iwate and Miyagi prefectures are possibly different from those at an Aomori station. On the other hand, statistically significant differences in the otolith Sr/Ca ratios among Aomori, Iwate, Miyagi and Shizuoka groups were found in the adult Japanese flounder. That is, higher values for the otolith Sr/Ca ratios were found in the groups inhabiting in the northern regions. The differences in otolith Sr/Ca ratios among these groups probably indicate that there are differences in the fish populations among these sample sites.

scholarly journals Feeding Habits of the Japanese Flounder Paralichthys olivaceus in Pacific Coastal Waters of Tohoku District, Northeastern Japan.

1998 ◽  
Vol 64 (2) ◽  
pp. 249-258 ◽  
Author(s):  
Hideaki Yamada ◽  
Keiichi Sato ◽  
Sachio Nagahora ◽  
Atsushi Kumagai ◽  
Yoh Yamashita
Keyword(s):  
Coastal Waters ◽  
Feeding Habits ◽  
Paralichthys Olivaceus ◽  
Japanese Flounder ◽  
Northeastern Japan

scholarly journals FLUCTUATION OF POST-PRANDIAL PLASMA MINERAL LEVEL OF JUVENILE JAPANESE FLOUNDER, Paralichthys olivaceus FED DIETARY PHOSPHORUS AND PHYTASE SUPPLEMENTATION

2010 ◽  
Vol 5 (2) ◽  
pp. 117 ◽  
Author(s):  
Asda Laining ◽  
Rachmansyah Rachmansyah ◽  
Lideman Lideman ◽  
Shunsuke Koshio
Keyword(s):  
Paralichthys Olivaceus ◽  
Peak Level ◽  
Inorganic Phosphorus ◽  
Japanese Flounder ◽  
Feeding Time ◽  
Post Feeding ◽  
Dietary Phosphorus ◽  
P Content ◽  
Significant Difference ◽  
Fish Tank

In order to investigate the phytic acid degradation in the gut of post juvenile Japanese flounder, indirect method was carried out by measuring the pre-prandial and postprandial plasma mineral and alkaline phosphatase (ALP) level as well as liver phosphorus content. The experiment was designed into a Randomized Block in which experiment units were grouped according to sampling days at 10, 20 and 30 days of feeding time. Experimental diets contained three levels of dietary inorganic phosphorus at 0.0; 0.25 and 0.5% combined with two levels of dietary phytase at 0 and 2,000 FTU/kg diet. Juvenile Japanese flounder (IBW = 36.2 g) were randomly distributed into 6 tanks of a 200 L capacity with density of 15 fish/tank. Blood sampling was carried out at 0 hour (before feeding or pre-prandial) and at 1, 3, 6 and 12 hour post feeding (post-prandial) time in three sampling days, respectively. Plasma was measured for mineral and ALP levels, while liver was analyzed for P content. The observation showed that fish fed without both dietary IP and phytase supplements had the lowest postprandial plasma IP, Mg and ALP levels during 12-h postprandial period. Plasma IP level at 6-h post-feeding in groups fed dietary 0.25 and 0.5% IP were significant higher when diet supplemented with phytase than those without phytase supplement. Peak level of plasma IP in fish fed 0.25% IP was similar to fish fed 0.5% with the presence of dietary phytase. At 1 and 3-h post-feeding, plasma Ca level increased in all groups, but significant difference was only observed between group fed diet without both dietary IP and phytase and other groups. Similar to plasma IP level, peak of plasma Mg and ALP concentration occurred in fish fed 0.25% IP together with phytase, and did not significantly differ from fish fed with 0.5% IP even when phytase was included in diet.

scholarly journals Seasonal changes in swimming behavior of adult Japanese flounder Paralichthys olivaceus in the coastal waters off Nagasaki Prefecture, Japan

2014 ◽  
Vol 80 (3) ◽  
pp. 339-348 ◽  
Author(s):  
NAOYUKI NAKATSUKA ◽  
TOHYA YASUDA ◽  
HIROKO KATSUMATA ◽  
SEISHIRO FURUKAWA ◽  
YUTAKA KURITA ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Seasonal Changes ◽  
Paralichthys Olivaceus ◽  
Japanese Flounder ◽  
Swimming Behavior ◽  
Nagasaki Prefecture

Localization of calcium and zinc in the sperm storage tubules of chicken, quail and turkey using X-ray microanalysis

Reproduction ◽  
2000 ◽  
pp. 331-336 ◽  
Author(s):  
L Holm ◽  
H Ekwall ◽  
GJ Wishart ◽  
Y Ridderstrale
Keyword(s):  
Calcium Concentration ◽  
Sperm Storage ◽  
X Ray ◽  
Elemental Concentrations ◽  
Low Concentrations ◽  
Intracellular Content ◽  
Wet Weight ◽  
The Mean ◽  
Sperm Storage Tubules ◽  
Scanning Electron

Sperm storage tubules from the utero-vaginal junction of chickens, quails and turkeys were analysed for calcium and zinc using X-ray microanalysis of ultra-rapidly frozen tissue in a scanning electron microscope. This technique enabled the tubular fluid surrounding the stored spermatozoa and the intracellular content of the cells of the sperm storage tubules to be analysed separately and, by using standards with known concentrations, their elemental concentrations were estimated. The mean (+/- SEM) concentration of calcium in the tubular fluid from chickens, quails and turkeys was 17 +/- 3, 19 +/- 3 and 17 +/- 4 mmol kg(-1) wet weight, respectively. The intracellular calcium concentration of the cells of the tubules did not differ significantly from these values and was also similar in the mucosal epithelial cells of the utero-vaginal junction. Zinc was localized in the cells of turkey sperm storage tubules and tubular fluid, but at low concentrations. No zinc could be detected in corresponding structures from chickens and quails. The concentration of calcium in the tubular fluid is within the range known to inhibit the motility of spermatozoa, supporting this function for calcium during storage. Zinc is known to depress turkey sperm metabolism and it may also be involved in inducing quiescence of spermatozoa during storage in this species.

Mapping QTLs for principle components of growth traits using distorted markers in Japanese flounder Paralichthys olivaceus

2017 ◽  
Vol 24 (3) ◽  
pp. 440
Author(s):  
Ning LI ◽  
Liyi ZHANG ◽  
Ting LI ◽  
Yanhong LI ◽  
Haijin LIU ◽  
...  
Keyword(s):  
Growth Traits ◽  
Paralichthys Olivaceus ◽  
Japanese Flounder
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