山階鳥類研究所研究報告
Online ISSN : 1883-3659
Print ISSN : 0044-0183
ISSN-L : 0044-0183
1 巻 , 13 号
選択された号の論文の4件中1~4を表示しています
  • 山階 芳麿, 高野 伸二
    1959 年 1 巻 13 号 p. 505-521
    発行日: 1959/10/05
    公開日: 2008/11/10
    ジャーナル フリー
    1.1957年夏南ロデシアで開かれた第X回国際鳥類保護会議においてDr.E.Schüz氏が近年減少しつつあるコウノトリの国際調査を提案し,1958年をその調査年とする事が決定した。我国もこの調査に参加する事とし,日本鳥類保護連盟が主体となって各機関協力の下に全国的な調査を行った。
    2.明治以前にはコウノトリは日本に広く分布していたらしい。江戸の社寺の屋上にも営巣したという事が古文献に多く残っている。しかしその後減少し殆ど姿を消し,現在「日本鳥類目録」で承認されている記録,北海道(十勝)•本州(秋田,福井,石川,千葉,横浜,兵庫)•四国(徳島)の中,石川,福井,兵庫のみが近年のもので,他は北海道(1923年)を除けば全て明治前半の記録である。
    3.林野庁の1958年コウノトリ調査結果は第1表~第3表に示した。現在棲息及び繁殖が確認されている兵庫県及び福井県以外ではコウノトリが常住している所は発見出来なかった。なお,第3表の栃木県大田原市立羽田小学校所蔵標本はコウノトリではなく,オオハクチョウCygnus cygnusである事が確かめられた。
    4.「週刊朝日」の協力によるコウノトリの調査結果によれば,秋田,宮城,石川,福井,兵庫,滋賀,大阪,山口諸府県における記録の報告があったが,新らしいコウノトリの常住地は発見されなかった。最も報告の多かった秋田県のものはアオサギの誤認と思われる。唯石川県及び山口県では近年迄コウノトリが繁殖していたらしい事が推察された。
    5.兵庫県出石附近のコウノトリは明治27年に一番が再発見されてから,次第に数を増し,昭和5~6年頃が最盛期で約百羽と推定された。その後又数が減り,昭和31年には20羽となった。昭和33年の調査では少くとも7巣,15羽,昭和34年には8巣17羽が棲息する事が判った。
    6.福井県下でコウノトリの繁殖が初めて確認されたのは昭和32年で,武生市と小浜市の2ヶ所であった。同地にはその後毎年営巣している。確認された数は昭和32年8羽,昭和33年6羽,昭和34年7羽であるがその中3羽は死亡が認められている。
    7.コウノトリの保護については現在未だ充分な対策がたてられていないが,次第に地方の人々の関心も高まりつつある。現在保護の対策として次の事が考えられる。
    1.農薬の使用制限2.農薬の害を受けない給餌場の設置3.営巣場所としての林の保存4.人工営巣場所の設置5.サギ類との関係の調査
  • 高島 春雄
    1959 年 1 巻 13 号 p. 522-530
    発行日: 1959/10/05
    公開日: 2008/11/10
    ジャーナル フリー
    The Gotô Islands are under the administration of Nagasaki Prefectural Government in Kyûshû District. These islands consist of more than one hundred isles scattered over an area of 100km. to the northwest of the main island Fukaé, which is situated approximately 92km. away in the due west of the Port Nagasaki. Gotô means five islands, and they are represented by the five principal islands among the above isles, namely, Fukaé, Naru, Wakamatsu, Nakadôri and Uku.
    The investigation on the fauna of these islands has scarcely been made so far, and I have referred in my report to the following questions:
    1. Mammals of the Gotô Islands-I have made a detailed report especially on Musk Shrew Suncus murinus (Linné) brought into the island Fukae from Nagasaki and its neibourhood after the War. It seems that these Musk Shrew were brought in with the ships' cargo, etc. and came to breed there.
    2. Regarding reptiles, there seem to be at least 15 species including Sea Turtles and Sea Serpents. I have given a key to discriminate these species.
    3. On amphibians: 7 species are now known. However, the number of species is supposed to be increased with further investigation in the future.
    4. Among insects, cicadas and butterflies are known to considerable extent. 6 species of cicadas have already been put on record so far. As for butterflies, 45 species have been recorded, the number of the species will be increased up to 60, there being some other common species which have not yet been collected. The noteworthy ones among the above species of butterfly are Papilio memnon thunlergii Siebold, Celastrina argiolus ladonides (de l'Orza), Everes lacturnus kawaii Matsumura, Precis orithya (Linné), Hypolimnas misippus (Linnré), etc
  • 佐藤 晶子
    1959 年 1 巻 13 号 p. 531-534
    発行日: 1959/10/05
    公開日: 2008/11/10
    ジャーナル フリー
    性的に未成熟な,あるいは成熟したハツカネズミ(Mus musculus)の雌に,血清性性腺刺激ホルモン「セロトロピン」を5国際単位,絨毛性性腺刺激ホルモン「プリモゴニール」を10国際単位,40時間の間隔を置いて筋肉内に注射した。それにより成熟ハツカネズミの少数例において生産仔数の増加を認めた。産仔数は最高15頭,最少11頭,平均12.6頭であった。対照区の産仔数は最高12頭,最少2頭,平均6.5頭であるから,実験区においては平均して約2倍の増加である。出産仔は生後2日の間に死亡する個体があり,成長仔数は最高9頭,最少7頭,平均8.4頭である。未成熟個体では出産に至ったのは1例のみで産仔数は7頭であった。成熟した雌ハツカネズミを用いて,その年令,出産経験の有無,ホルモン投与量ならびに出産前後における母体の栄養について研究し,実験を行なうことにより,一時に大量の出産を得ることも不可能なことではないと考えられる。
  • 黒田 長久
    1959 年 1 巻 13 号 p. 535-552
    発行日: 1959/10/05
    公開日: 2008/11/10
    ジャーナル フリー
    Continued from the Part 2, reported in No. 10 of this journal, the following are described: 1) 90 eggs of 17 first and 3 second clutches were measured and the Size Index (length x width), Shape Index (width/length %) and Volume Index (weight/size index %) were calculated. The details are treated in other separate paper and only the comparison between the first and second clutches is reported. The general trend was smaller and rounder in the second clutches but in a second clutch of a pair the eggs were distinctly larger (in two other pairs smaller). 2) Eggs are hatched on the 12th day of incubation. A chick became strong enough to gape 40-50 minutes after complete hatching. The growth curve in weight a little inclines from the 12th day (but straight in case of the brood of one chick) when the feathers begin to grow. The maximum, 83gm. being the extreme, is reached at the 15th day, and they fly at the average of 77-78gm. on the 21st and 22nd days. Those grew heavier than about 80gm. loose and the light ones below 70gm. gain the weight on flying. 3) In small broods of 2 or 3 chicks the size difference in chicks is rather distinct until flying but in larger broods the growth rate of chicks interchange in course of time and the growth curves become rather uniform. The brood of 4 chicks seems to be most efficient in this 'number effect' in correlation with timing of digestion to become hungry in turn. 4) The correlation with growth of the body length (from shoulder to cloaca), body temperature (below the theigh) and breathing rate (number in 15 seconds) was recorded and from these the nestling period could be divided into three stages: The 1st week, the naked stage, when the breathing rate rarely reaches or overs 20 and the body temperature 35°C at about the 5th day, the Growth Index (body weight/body length %) not reaching 70% until about 6th day. The 2nd week when the feather sheaths appear. The body temperature reaches 39°C and from the 7th day the breathing rate reaches 20-22, which are the average of matured birds, but still decreases to 15-17 by cooling and on the other hand becomes capable of increasing up to 25-28 or 30 in the nest as high as 90-100°C or by feeling 'anxiety' taken in human hand. The Growth Index reaches 90-100% at 10th-13th day. In the 3rd week when the feathers cover the whole body, the body temperature becomes constant and averages at 40°C. The body weight reaches the maximum and the Growth Index overs 100%, but then decreasing with the loss in body weight after 17th day. 5) The increase of body length is rather constant but the body weight, breathing rate and body temperature are very susceptible to the cooling and hunger as shown in Tables 18, 19 and 20. 6) The feeding rate of parents is subject to the age and number of chicks and a case of low feeding rate in the brood of two chicks is reported. At first, the male continues the watching which he used to do during the incubation period and the female needs some time to brood the chicks, which may take rather long time to digest the large food given. 7) The interval of 5 minutes may be the maximum feeding rate for a parent as it flies 100-800m. chiefly in search of secretive Mole-crickets. This means 12 times an hour, hence 24 times an hour by two parents. But the actual most frequent feeding was 14 times an hour. Parents with 7 chicks worked very hard and raised them successfully. Also they worked hard for experimental 9 chicks whose growth was, however, much lower than average (result of 1957). When a parent was lost two and three chicks only could survive from brook sizes of 5 and 4. Individual difference in feeding ability of parents is well reflected in the growth rate of chicks of Nos. 10, 15 and 7 (Fig. 12).
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