著者

松田 達郎

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.71, no.11, 1962-12-15

著者

浜口 幸久 井上 信也

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.92, no.4, 1983-12-25

著者

佐々木 忠次郎

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.32, no.383, 1920-10-12

著者

菅野 文和 石井 圭一

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.87, no.4, 1978-12-25

著者

土屋 勇之輔

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.5, no.51, 1893-01-15

著者

波磨 忠雄

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.61, no.3, 1952-04-15

著者

Yasukawa Yuichirou Ota Hidetoshi Iverson John B.

出版者

社団法人日本動物学会

雑誌

Zoological science (ISSN:02890003)

巻号頁・発行日

vol.13, no.2, pp.303-317, 1996-04-15

被引用文献数

4 30

---

The batagurid turtle, Mauremys mutica, is widely distributed in tropical to temperate East Asia. Analyses of morphometric characters and coloration revealed that the southern Ryukyu populations of this species are much diverged from the other populations, presumably as a result of their long geographical isolation. We describe those populations as a new subspecies, M. m. kami. Analysis of geographic variation also suggested that distinctly isolated populations of the central and northern Ryukyus, and Kyoto and Shiga Prefectures of central Japan have originated from animals artificially introduced from the Yaeyama Group, and Taiwan, respectively. We confirmed the absence of "larger female" sexual size dimorphism (SSD) in M. mutica unlike most other aquatic batagurids, and further demonstrated variation in SSD pattern between the subspecies: in M. m. kami, the adult male has a significantly greater carapace length than adult females, whereas the adult carapace length does not differ significantly between sexes in the nominotypical subspecies. It is hypothesized that these dimorphic patterns evolved from the widely prevailing "larger female" condition through epigamic selection involving forcible copulatory behavior.

著者

小林 弘 越智 尚子

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.81, no.1, pp.67-71, 1972-01-15

被引用文献数

13

---

The ginbunas (Carassius auratus langsdorfii) captured in the Kanto district were exclusively females, and there was no report of capture of male fish. For understanding this curious phenomenon, comparative studies were made on the chromosomes of the ginbuna and F_1 hybrids derivatived from a cross between the ginbuna and the kinbuna (Carassius auratus subsp.) and between the ginbuna and the loach (Misgurnus anguillicaudatus). Three females of the ginbuna captured in the Kanto district were used for the present investigation. The eggs spawned by each of the females were divided into two groups; the eggs of one group were artificially inseminated with sperms of the kinbuna, and the eggs of the other group with sperms of the loach. All the larvae grown up from the two types of hybrid crosses were identical with the maternal ginbuna in their appearance. Chromosome preparations were made from kidney and gill cells with the usual air-drying technique, after pretreatment with colchicine and hypotonic solution. The results of chromosome analysis showed that the maternal ginbuna had 156 chromosomes, consisting of 17 pairs of metacentrics, 31 pairs of submetacentrics and 30 pairs of acrocentrics. The chromosomes of 14 offsprings by the hybrid crosses, so far examined, had the same chromosome number of 156. Comparing the karyotypes of the maternal ginbuna and their offsprings, we found a gross similarity in their chromosomes as far as the morphological analysis is concerned. In the present study we failed to examine the chromosomes of the paternal kinbuna and loach. However, it is generally accepted that the kinbuna has 100 chromosomes and the loach has 50 chromosomes in both sex. The most likely explanation for the present results would be that the production of the triploid offspring might be arisen by gynogenesis, as was already pointed out by Kobayasi et al. (1970) and Kobayasi (1971).

著者

竹脇 潔

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.43, no.514, pp.546-547, 1931-08-15

著者

竹脇 潔

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.43, no.515, 1931-09-15

著者

H.I.生

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.23, no.275, pp.528-529, 1911-09-15

著者

Ohara Kenichi Dong Shi Taniguchi Nobuhiko

出版者

社団法人日本動物学会

雑誌

Zoological science (ISSN:02890003)

巻号頁・発行日

vol.16, no.6, pp.909-913, 1999-12-15

被引用文献数

14 25

---

The silver crucian carp, Carassius langsdorfii has three reproductive characteristics : gynogenesis, polyploidy (triploid or tetraploid), and genetic homogeneity within a family. In natural water, the silver crucian carp populations consist of multiple clonal lines. In the present study, three microsatellite DNA loci were used to distinguish several clonal lines of the silver crucian carp sampled from natural water. Progeny and the maternal fish had the same genotype in the three loci. In 237 fish collected from the wild, nine alleles were observed in GF1^*, sixteen alleles in GF17^*, and nine alleles in GF29^*. Ten genotypes were observed in GF1^*, seventeen in GF17^* and eight in GF29^*. The proportion of heterozygotes was very high in each locus (1.000). Sixteen clonal lines were distinguished by the combined genotypes of three microsatellite loci. Two subtypes were also detected within the clonal line KOC-011.