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Volume 12 (1962)
- Issue 6 Pages 203-
- Issue 5 Pages 163-
- Issue 4 Pages 123-
- Issue 3 Pages 83-
- Issue 2 Pages 43-
- Issue 1 Pages 1-
Predecessor
Volume 12, Issue 2
Displaying 1-13 of 13 articles from this issue
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Article type: Cover
1962 Volume 12 Issue 2 Pages Cover1-
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
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Article type: Cover
1962 Volume 12 Issue 2 Pages Cover2-
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSDownload PDF (32K) -
Article type: Appendix
1962 Volume 12 Issue 2 Pages App1-
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
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Hiroshi YAMAGISHIArticle type: Article
1962 Volume 12 Issue 2 Pages 43-53
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSYAMAGISHI, Hiroshi (Tokyo Metropolitan Univ., Tokyo) Growth relation in some small experimental populations of the rainbow trout fry, Salmo gairdneri RICHARDSON with special reference to social relations among individuals. Jap. J. Ecol. 12,43-53,(1962). In several small experimental populations of minute size-variation, the growth of the fry was studied with observations on social behaviour. 1. In the earlier course of the experiment it was seen that a socially dominated fry grew not always faster than the subordinated ones. In the later course, however, the former grew most rapidly and ranked first in size. These facts showed the existance of some periods in which the "size hierarchy" is not directly effective to growth. 2. Under the same population density both growth and survival rates increased. with an increase of bottom area of tanks. These rates were especially high when the bottom area was far greater than the potential maximum size of the territory which one fry could occupy (about 3500〜4000cm^2). 3. Differences of growth of individuals and mortality of the population were increased when food was given to the limited area. 4. Observations of social behaviour of the fry under natural and experimental conditions showed that visual isolation by bottom topography played an important role in the formation of trout territory.View full abstractDownload PDF (1378K) -
Satoshi YAMAGISHIArticle type: Article
1962 Volume 12 Issue 2 Pages 54-59
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSYAMAGISHI, Satoshi (Tenryu Low. Sec. School, Nagano Pref.) Roosting behaviour in crows. 1. Autumnal and wintry roosting behaviour in Nagano Prefecture. Jap. J. Ecol. 12,54〜59 (1962) The roosting behaviour of crows was observed in Nagano Prefecture, and the results are as follows : (1) In the daytime in autumn crows form small flocks in their habitat and feed there. Before sunset they gather at their regular assembling places, and then move to roost in groups. The group at the farthest assembling place from the roost move first, joining the nearest group, one by one, and at last all of the crows reach the roost. (Fig. 1) (2) There are three roosts in autumn in Upper Ina-gun and Lower Ina-gun ; in winter one of these three is used as their wintry roost, and the other two are canelled, being used only as their assembling places. Crows' number in each of these three autumnal roosts is about 900,and the number in one wintry roost is about 3,000. (Fig. 2) (3) The numbers of the above-mentioned wintry roosts are seven in Nagano Prefecture ; crows' number in each of them is 1,000〜3,000. Only ever-green woods are used as the wintry roosts, the main tree species of which is Japanese red-pine. (Fig. 3,Table 1) (4) In the future I intend to investigate on crows' roost in their breeding season and the actual organization of their society.View full abstractDownload PDF (1747K) -
Kazutosi AKITAKE, Ituo MIYATAArticle type: Article
1962 Volume 12 Issue 2 Pages 59-67
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSAKITAKE, Kazutoshi and Ituo MIYATA (Univ. Kyushu, Fukuoka) The vegetational structure of a secondary forest on Mt. Seburi, Kyushu, South-west Japan. I. Vegetational analysis on the basis of the physiographical gradients and the similarity index. Jap. J. Ecol. 12,59-66 (1962). A secondary forest of developmental stage, which was abandoned after deforestation for charcol making, was investigated employing 32 quadrats established along the topography and altitude transectlines on the north slope of Mt. Seburi, Kyushu, South-west Japan. Phytosociological analysis was carried out along the two gradients of topography and altitude. The distributional pattern of both the tree-and herb-layer species along the topography gradient is classified into three types as follows : (a) the species which are more predominant on the ridges, (b) the species which are more predominant in the valleys and (c) the species which are distributed almost uniformly throughout the area. Also, three types of the distribution of both layer species are shown along the altitude gradient, although some of the species exhibit conspicuous variation of occurrence at 800m in altitude. There is suggested that the vegetational structure concerning Nt, TR^2/Nt, St and Sh varies along the two gradients. Using the index c (SφRENSEN 1948), A (BARKMAN 1958) and C_λ (MORISITA 1959), similarity or dissimilarity among the community-groups developed on different topographical or altitudinal sites was detected. As the result, it is concluded that the community-groups on the ridges or in the valleys are similar in composition and structure to each other, and the community-groups of the ridges differ from those of the valleys, and that the group I of 800m in altitude is dissimilar to the other three groups of 750m, 700m and 650m in altitude.View full abstractDownload PDF (1001K) -
Jun-ichi HASEGAWAArticle type: Article
1962 Volume 12 Issue 2 Pages 67-72
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSHASEGAWA, Jun-ichi (Sapporo-kosei Gakuen, Hokkaido) Altitudinal zones of the vegetation on Mt. Yotei, Prov. Shiribeshi, Hokkaido. From the investigations on the changes in distribution of trees and their quantity with the increase of altitude, four vegetation zones were recognized, viz. Pinus pumila zone at the altitudes of 1700〜1850m, Betula Ermani zone 1050〜1700m, Picea jezoensis-Betula Ermani zone 650〜1050m, montane broad-leaf forest zone 500〜650m. This zonation is caused by comparatively sudden alternation of one or two dominant species with altitude. But each species in general has its own distribution area and the plant communities change continuously with altitude.View full abstractDownload PDF (1005K) -
Juro KOYAMAArticle type: Article
1962 Volume 12 Issue 2 Pages 72-73
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
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[in Japanese]Article type: Article
1962 Volume 12 Issue 2 Pages 73-78
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
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Article type: Appendix
1962 Volume 12 Issue 2 Pages 78-82
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
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Article type: Appendix
1962 Volume 12 Issue 2 Pages App2-
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
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Article type: Appendix
1962 Volume 12 Issue 2 Pages App3-
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSDownload PDF (36K) -
Article type: Appendix
1962 Volume 12 Issue 2 Pages App4-
Published: April 01, 1962
Released on J-STAGE: April 08, 2017
JOURNAL FREE ACCESSDownload PDF (36K)
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