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Volume 9 (1940 - 1941･･･
- Issue 6 Pages 225-
- Issue 5 Pages 181-
- Issue 4 Pages 133-
- Issue 3 Pages 91-
- Issue 2 Pages 47-
- Issue 1 Pages 1-
Volume 9, Issue 4
Displaying 1-10 of 10 articles from this issue
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Morisaburô TAUTI1940 Volume 9 Issue 4 Pages 133-135
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSA study on the stock of Thunnus orientalis (TEMMINCK et SCHLEGEL), in which the catch records for each body-weight class were utilized as bases, showed that survival rate is •30 for young fish, medi, but •75 for the adults, while fishing rate is •55 for the youngs but •10 for the adults.View full abstractDownload PDF (193K) -
Morisaburô TAUTI1940 Volume 9 Issue 4 Pages 136-138
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSBased on the catch records given for each body-length and body-weight classes, the stock of Neothunnus macropterus (TEMMINCK et SCHLEGEL) was studied. If the natural mortality rate, is assumed to be •20, the survival rate is known to be •75 for young fish but •57 for the adults while the fishing rate to be •06 for the youngs but •29 for the adults.View full abstractDownload PDF (180K) -
Morisaburô TAUTI1940 Volume 9 Issue 4 Pages 139-141
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSStock of Germo germo (LACÉPÈDE) was studied on the bases of catch records classified according to the body-length and body-weight. Survival rate was estimated to be about •66, while fishing rate as about •18.View full abstractDownload PDF (171K) -
III. Sperm Whale in the Adjacent Waters of JapanYoshio MATSUURA1940 Volume 9 Issue 4 Pages 142-144
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSThe present account is based on the statistics received by the Bureau of Fisheries from the various whaling companies in the period extending from 1933 to 1939.
(1) Of the 364 sperm whale foetuses 170 were males and 189 females. Out of these foetuses only two cases of twins were met with: - 1) 1935 June Mother 10•3m., male foetuses 2•4 and 1•8m. 2) 1939 May Mother 10•0m., female foetuses 3•0 and 1•8m. both stranded at Ayukawa, Miyagi Prefecture.
(2) Inferring from the 364 recorded foetuses it may be stated that the sperm whale has a period of maximum frequency of probable impregnations in the season from January to May and probable parturitions in the season from May to August as is shown in the accompanying figure in the text. The length of gestation period suggested by these figures is about sixteen months. These results coincide fairly well with those obtained by MATTHEWS (1938) on the sperm whale in the southern hemisphere.View full abstractDownload PDF (189K) -
Mititaka UDA1940 Volume 9 Issue 4 Pages 145-148
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSSome tentative studies of the fishing conditions of “Katuo”, Euthynnus vagans (LESSON), as a function of several oceanographic elements, including surface temperature, are given here.
The fishing locality of “Katuo” moves from the region off Nozimazaki in May, passing off Tyosi in June, to the region off Kinkwazan in July. The paths seem to follow the warm branches of currents, which are recognizable by the tongs of isotherms either at the surfase or at the subsurface of 100m depth. The concentration of the shoals seems to be defined not only by the surface water temperature but also by the vertical distribution of vertical tem-perature gradient in the uppermost 100m layer. The paths also have close bearing to the migration of sardine shoals and to the distribution of copepoda, both being the natural food fauna for “Katuo”
In the sea-region south off Kagosima Pref., the catch of “Katuo” varies with salinity throughout the periods from March to September (Fig. 6). The value of transparency and of salinity giving the mode for the catch are shown in Figs. 5 and 7.View full abstractDownload PDF (287K) -
Syûzô NAKASIMA, Kendi AKIMA1940 Volume 9 Issue 4 Pages 149-150
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSResearches on the distribution of ascorbic acid in animal organs, such as with mammals by PLANT and BÜLOW, FUJITA and EBIHARA and SVIRBELY, with fish by LUDANY and with invertebrata by ÔYA and HIROSAWA, and SVIRBELY, were extended to snapping turtle, Amyda japonica. As shown in the annexed table, it was known that among the examined organs, - muscle, lung, pancreas, liver, heart, kidny, spleen and intestine, - spleen is the richest in ascorbic acid, liver and kidny are rather rich, while muscle contains the least.View full abstractDownload PDF (105K) -
Takeo ÒYA, Norikage ISII1940 Volume 9 Issue 4 Pages 151-153
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAlthough the problem, whether the Vitamin C is an indispensable constituent of the nutrition for the invertebrata or not, was only recently researched with insects and with negative conclusions, many authors have hitherto reported the existence of vitamin C in the organs of invertebrata. The present paper adds to the similar results of determination of the ascorbic acid in edible marine invertebrata and algae, as listed in table 1. That no variation in the vitamin C in porphyra is caused by drying is also examined.View full abstractDownload PDF (171K) -
Ituo KUBO1940 Volume 9 Issue 4 Pages 154-158
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSMy observations on 64 males (54-64cm long) and 61 females (52-65cm long) of O. keta as well as 69 males (54-64cm long) and 84 females (50-62cm long) of O. nerka caught in Kamchatski Gulf during a period from May 26th to June 17th, 1940 confirmed that the former is distinguishable from any other species of the genus Oncorhynchus in having 13-17 silvery caudal rays besides ordinary ones (Fig. 2, B). The silvery lustre is preserved for a long duration of time in salted or smoked condition whereas it does not last more than three weeks when fixed in formalin, a fact that accounts for the total absence of such a feature put on record. The depth (vertical diameter or median width, Fig. 1, A) and thickness (side diameter or sagittal width Fig. 1, B) of the caudal peduncle are variable, but the depth proved smaller in O. keta than in O. nerka and the ratio of depth to thickness was also found smaller in the former than in the latter when statistically examined (Tables 1-3, Fig. 3).View full abstractDownload PDF (1041K) -
Itirô MIYAZAKI1940 Volume 9 Issue 4 Pages 159-180
Published: November 25, 1940
Released on J-STAGE: February 29, 2008
JOURNAL FREE ACCESSAcanthogobius flarimanus (T. et S.) is one of the most common and important gobies which is found very abundantly in all coastal areas of Japan. It is also very familiar to the nation as a popular game fish as well as a delicious food fish. But little is as yet known of its life-history and habits and no one, so far as I am aware, has ever given a scientific description concerning this point. It seems, therefore, worth while to put on record the details of my recent observations, which were made at Kanazawa Laboratory from 1938 up to 1940. The present communication embodies the following sections; 1) distribution, 2) annual yield, 3) habitats, 4) fishing methods and season, 5) food and feeding habit, 6) spawning season and habit, 7) secondary sexual charactors, 8) seasonal cycle in the gonad, 9) number of matured ovarian eggs, 10) young with reference to those of other gobies, 11) relation between body-weight and length, 12) scale, 13) age, 14) growth, 15) maturation, 16) stock, 17) sex-propor-tions, 18) seasonal change of activity concluded from long-line fishery experiments, and 19) diseases.View full abstractDownload PDF (4049K) -
1940 Volume 9 Issue 4 Pages e1
Published: 1940
Released on J-STAGE: April 22, 2008
JOURNAL FREE ACCESSDownload PDF (40K)
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