著者

日高 敏隆 米川 誠

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.68, no.1, pp.27-31, 1959-01

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In full-grown larvae (50mm or a little more in body length) of Malacosoma neustria testacea Motschulsky, extirpation of either the prothoracic or the mesothoracic ganglion results in a marked distension of the body within about 24 hours. The body becomes fully stretched, attaining about 70mm in length. The larvae become almost unable to move, except that they show a continuous biting and swallowing movement of mouth-parts. The alimentary canal is filled with air thus swallowed. When punctured by needle, the air escapes from the alimentary canal and the body immediately becomes reduced in size (see Figs. 1 and 2). After removal of the subesophageal ganglion or of the brain, the mouth-parts become immobile. In these larvae, extirpation of the prothoracic ganglion no longer causes the distension of the body. If the mouth and anus are closed with paraffin immediately after removal of the prothoracic ganglion, no distension of body can be observed. It is obvious, therefore, that the body distension following removal of the prothoracic ganglion is largely attributable to an abnormal intake of excess amount of air into the alimentary canal. Extirpation of the prothoracic ganglion appears to bring about a failure of a proprioceptic inhibitory mechanism. In younger larvae, mature larvae or prepupae no distension of body takes place after removal of the prothoracic ganglion. In the silkworm (Bombyx mori, L., J-122×C-115) deprived of the prothoracic ganglion, the distension is very slight.

著者

Kajihara Hiroshi Gibson Ray Mawatari Shunsuke F.

出版者

日本動物学会

雑誌

Zoological Science (ISSN:02890003)

巻号頁・発行日

vol.20, no.4, pp.491-500, 2003-04

被引用文献数

7

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Potamostoma shizunaiense gen. et sp. nov. (Nemertea: Hoplonemertea: Monostilifera) is described from the mouth of the River Shizunai, Hokkaido, Japan. This genus is readily distinguished from other monostiliferans by an oesophagus opening far anteriorly into the rhynchodaeum, a well developed excretory system extending the whole body length, terminals of the excretory collecting tubules situated between the body wall circular muscle layer and the dermis, and bilobed testes in males.

著者

宮尾 嶽雄 両角 徹郎 両角 源美 花村 肇 佐藤 信吉 赤羽 啓栄 酒井 秋男

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.72, no.5, pp.133-138, 1963-05

被引用文献数

4

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From April, 1962 to March, 1963, the authors collected small mammals (Rodentia and Insectivora) monthly by snap traps in the subalpine forest zone (Tsugadiversiforia-Abies Mariesii forest zone, alt. 1,300-2,400m) on Mt. Yatsugatake in Honshu. Total number of captured mice and voles was 961 with the following proportional breakdown: Rattus rattus 1, Apodemus speciosus 14, Apodemus argenteus 308, Clethrionomys andersoni 616, Anteliomys smithii 20, Microtus montebelli 2. The number of moles and shrews taken was 231 with the following breakdown: Euroscaptor mizura 1, Urotrichus talpoides hondonis 18, Dymecodon pilirostris 151, and Sorex shinto shinto 61. Rattus rattus and Microtus montebelli were found in this area. Apodemus speciosus and Urotrichus talpoides hondonis were only found in the lower part of this grassy area. On the other hand, Apodemus argenteus, Clethrionomys andersoni, Anteliomys smithii, Dymecodon pilirostris, Sorex shinto shinto were widely found in this forest zone. It was noted that the largest number of Apodemus argenteus appeared in spring, but the peak of Clethrionomys andersoni was seen from autumn to winter (Fig. 2). The average embryo sizes of each species were as follows: Apodemus speciosus 5.7, Apodemus argenteus 3.9, Clethrionomys andersoni 3.3, Anteliomys smithii 3.5, Microtus montebelli 3.0, Urotrichus talpoides hondonis 4.5, Dymecodon pilirostris 3.5, Sorex shinto shinto 3.7. The highest capture rate (number of captured small mammals/no. of set traps) occurred in October and the lowest rate in February. They reflect the effect of the population density and the snow fall, etc.

著者

Ogawa,M.

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.5, no.4, 1904

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.13, no.1, 1930-11-01

著者

宮尾 嶽雄 赤羽 啓栄 花村 肇 佐々木 泉 藤田 善和 大賀 将夫

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.75, no.8, pp.227-235, 1966-08

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A supplemental tubercle is often seen on the mesiobuccal part of the lamina on the lower molar of Rattus. We call this the mesiobuccal tubercle to distinguish it from the others. The main aim of this paper is to report on regional differences in its frequency of appearance on the mesiobuccal tubercle and to report on various supplemental tubercles on the lower molar of Rattus norvegicus. I. Regional difference: We have examined the regional difference of frequency of the appearance of the mesiobuccal tubercle in Rattus norvegicus, which were collected in the following four districts; Matsumoto City, Shiga Heights in Nagano Prefecture, Nagoya City and Fukuoka City. The most noticeable difference is found on the second lamina of the second molar. A quite significant difference is that the rate of frequency appearance on the right molar in Nagoya is 66.7%, which is far lower than the others; in Shiga Heights it is 91.7%, in Matsumoto City 95.1%, and in Fukuoka City 92.6%. On the second lamina of the third molar we recognize a regional difference, and especially the rate on the right molar in Nagoya, as well as that of the second lamina of the second molar, is much lower than the rate in the other three districts. II. Various supplemental tubercles which appear on the lower molar are as follows: 1) The supplemental tubercles found on the lingual surface between the first and the second lamina of the second molar. 2) The tubercle found on the distal surface of second lamina of the third molar. This tubercle is homologous to the posterior heel of the first and second molar and seems to be its remnant. 3) The tubercle found on the distobuccal of the first lamina of the first molar.

著者

[記載なし]

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.17(3,4), 1938-11-18

著者

Ogawa,Minori

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.6, no.5, 1908-12-18

著者

大島 正満

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.66, no.1, 1957-01

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As the results of the extensive collections made by the writer in the year 1949 and 1950, assisted by his student Mr. Sadahiko Imai, assistant professor of the Faculty of Fisheries of Kagoshima University, in order to compilate complete list of freshwater fishes inhabit in the streams of south werstern part of Kiushiu, it was affirmed that there exist two species of freshwater salmons in the head waters of main streams, treated under the same vernacular name 'Enoha''. One of which is evidently the river form of Oncorhynchus masou (Brevoort), while the other is the same of Oncorhynchus rhodurus Jordan & McGregor. Distributional area of the two is quite distinct, the former inhabiting in the headwaters of mam rivers which flow down to Pacific while the latter's habitats are limited to the upper streams of long rivers which enter into the Inland Sea. Oncorhynchus masou is the salmon of northern element, its distributional center being Hokkaido, instead of Oncorhynchus rodurus which is the form originated in Lake Biwa in the remote past. This facts show that the Pacific coasts of Kiushiu had been washed by the cold current coming down from Japan Sea in the prehistoric time, enabling southward migration of anadromous Salmonoid fishes like Oncorhynchus masou and Oncorhynchus keta as well. Occasional occurence of the former at the offshore of Kumamoto district and usual autumn run of the latter into several rivers in northern Kiushiu supports this supposition very strongly.

著者

KAWAKATSU,Masaharu

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.51, no.3, 1978-09-20

著者

Kuroda,Nagamichi

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.10, no.4, 1922-05-31

著者

林,良二

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.17, no.1, 1938-03-30

著者

Ijima,Isao

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.9, no.2, 1916-06-24

著者

KURODA,Nagamichi

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.24, no.1, 1950-12-25

著者

青柳 兵司

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.61, no.8, pp.233-236, 1952-08

被引用文献数

2

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I inclucle here all the fishes belonging to the families, Gobiesocidae, Limnichthidae, Parapercidae, Brotulidae, Bothidae and Soleidae, which are hitherto known from the coral reefs of the Riukiu Islands. These fishes contain fifteen species, including one new species, four of which are the additional species to the ichthyofauna of both Japan and the Riu-kiu Islands, as fllows: Limnichtlhys fasciatus WAITE Parapercis cylindrica (BLOCH) Monothrix polylepis OGILBY Dinematichthys riukiucnsis n. sp. Dinematichthys rinkiuensis n. sp. Total length 101.7mm; standard length 90.3mm. Depth 4.1 in length; head 3.5. Snout 4.1 in head; eye 9.3; interorbital space 3.2; depth of caudal peduncle 6.3; maxillary 2. D. 77; A. 61; V. 1. Scales in longitudinal series 127. Body cylindrical anteriorly, strongly compressed posteriorly; snout short, obtuse; maxillary extending backward for beyond hind margin of eye; eye exceedingly small, 2.8 in interorbital space; opercle with one short spine; tongue somewhat pointed; dorsal and anal not connected with caudal; caudal 10.9 in length, rounded; ventral close together, 4.2 in length, inserted on throat just before base of pectoral, but not reaching to anus; small, well-inbricated, cycloid scales covering body entirely; predorsal scales extending forward to above hind margin of preopercle; cheek covered with minute cycloid scales posteriorly; opercle, infraorbital and snout naked; jaws, vomers and palatines with bands of minute spine-like teeth. Color in formalin pale brown generally; fins pale. This new species closely resembles GUENTHER'S D. mizolepis. It is, however, distinguishable from the latter in having smaller eyes, a smaller number of dorsal rays and a large number of scales in the longitudinal series. I obtained one specimen, 101.7mm in length, at Ishigaki Island and eight specimens, 51.4mm to 83mm in length, at Okinawa-Honto. The above description was based upon the specimen collected at Ishigaki Island.

著者

江原 有信 佐藤 利夫

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.80, no.10, pp.358-363, 1971-10

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Square pulse (17.5 V, 50 msec) was applied to oyster ventricle which had been isolated and mounted on a separation box. Myocardial activity was intracellularly recorded by means of microelectrode filled with 3 M KCl. Electric stimulation of threshold strength affected the beat interval as follows: Length of beat interval was changed by the simulation applied even during repolarization phase which corresponded to so-called refractory period. Depolarizing current did not always produce an extra action potential, and sometimes delayed the production of succeeding spontaneous action potential according to stimulating moment (Fig. 1). Hyperpolarizing current did not always elongate the interval, and often evoked an extra action potential as the result of rebound excitation th shorten the interval. Compensatory pause could not be found in these experiments. The change in length of the beat interval caused by the stimulation applied before the critical point (Fig. 2) had an opposite relation against that applied after it. The change in the beat interval caused by depolarizing current differed markedly from that produced by hyperpolarizing current. The effect of depolarizing stimulation was essentially similar to that of small potential (Ebara, 1964b) which conceivably had an important role in rhythm formation of the whole ventricle.

著者

長谷川 和

出版者

日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.62, no.6, pp.206-211, 1953-06

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By heat-treatment (for 5-40 minutes at 25-34℃) of fertilized eggs of the toads, Bufo vulgaris formosus (Boulenger), four double-headed tadpoles, which lived more than 30 days, were obtained. Generally in the head portions of these animals the organs were formed doubly, while in the tail portions singly; and intermediate forms of the two portions were recognized in the trunk portions. It may be considered that these animals were produced by the division of the direction of primary invagination.

著者

HASHIMOTO,Hiroshi

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.54, no.3, 1981-09-20

著者

Nishi Hirotaka Sota Teiji

出版者

日本動物学会

雑誌

Zoological Science (ISSN:02890003)

巻号頁・発行日

vol.24, no.5, pp.475-485, 2007-05

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We studied genetic variation within the Japanese land snail Euhadra herklotsi, which occurs on Kyushu and the surrounding islands, using partial sequences of the mitochondrial COI gene and nuclear ITS2 genes. The phylogenetic analysis revealed the existence of two major clades: clade N in the north and clade S in the south. These clades were parapatric and overlapped in southern Kyushu. Genetic divergence was high in clade N, whereas it was much lower in clade S. In addition, isolation-by-distance within each clade was implied. Since no current geographical barriers separate these clades, the genetic structure of clade S might have been influenced by historical events, such as volcanic activity, and a resulting population bottleneck followed by range expansion. The genital characteristics of clade-S snails were distinct from those of clade-N snails, and snails in both clades were sympatric at one locality. The shells of clade-N snails were generally larger than those of clade-S snails, but the shell-size variation within each clade could not be explained simply by environmental variables. Our study suggests that E. herklotsi likely consists of two sibling species. The taxonomic status of the previously proposed subspecies of E. herklotsi and related species requires reassessment.

著者

徳田 御稔

出版者

日本動物学会

雑誌

日本動物学彙報

巻号頁・発行日

vol.13, no.5, pp.577-585, 1932

被引用文献数

1