伊佐 良信 (1)
加納 光樹 (1)
向井 貴彦 (1)
増子 勝男 (1)
1916 年 (1)
1918 年 (1)
1955 年 (1)
1960 年 (1)
1979 年 (1)
1955年 4 巻 4-6 号 212-217
In this note the present author has annotated on twelve unrecorded species of fishes with brief descriptions, to be included into the ichthyofauna of Echigo and Sado, Japan, and two species which are thought to be omitted from the ichthyofauna of this region.
1. Among the fishes to be added herein, there are two kinds of remarkable and rare subtropical fishes, which are young
and medium sized
. It should be mentionel that Sado and its neighbouring region are northern limit for their occurrence. The counts and measurements of the specimens of these two species are as follows: -
(1) Diploprion bifasciatus KUHR et VAN HASSELT
Total length 39.8mm, body length 30.5. Head 2.5 in body length; depth 2.3; snout 2.7 in head; eye 3.6. D. VIII, 15; V I, 5 and A II, 12. Second and third dorsal spines remarkably filamentous, whose length 38 and 63mm as measured to tip of filament respectively. Body strongly compressed laterally, color generally yellowish white (Fig.1).
CUVIER et VALENCIENNES
Total length 132, body length 108. Head 3.2 in body length; depth 2.3; snout 3.5 in head; eye 3.6. D. XII, 10; V. I, 5 and A. III, 8; with a strong opercular spine. Four straight longitudinal dark bands running lateral body, and a blackish blotch lying from third to seventh dorsal spines. Lower jaw protrude somewhat beyond upper jaw. This species is unrecorded form from the western coast of Honshu, Japan Sea (Fig.2).
2. Two rare boreal or deep-sea fishes of central Japan, which are referable to the families Cottidae and Zoarcidae respectively, were found in the Sado Channel. These were reported as new species from Toyama Bay by MATSUBARA (formerly SAKAMOTO) and KATAYAMA respectively. They are: -
Two specimens, body length about 160, collected by the Japan Sea Regional Fisheries Research Laboratory.
One specimen, total length 313, collected by the Japan Sea Regional Fisheries Research Laboratory.
3. A scorpaenoid fish,
HILGENDORF and an ophidioid fish,
(JORDAN et FOWLER) are thought to be excluded from his former list.
1916年 19 巻 8 号 723-727
1918年 21 巻 10 号 1015-1042
荒山 和則, 松崎 慎一郎, 増子 勝男, 萩原 富司, 諸澤 崇裕, 加納 光樹, 渡辺 勝敏
2012年 59 巻 2 号 141-146
Eight specimens (28.2–170.2 mm SL) of the non-indigenous bagrid catfish
were collected from the Lake Kasumigaura system, Ibaraki Prefecture, central Japan, during December 2008 and November 2011. Three juvenile specimens of this invasive species indicated successful reproductive activity in the lake system. The species is known to have similar morphological and food habits to channel catfish
, which has also invaded Lake Kasumiguara, causing damage to the ecosystem and problems for local fisheries. The establishment and future habitat expansion of
would also cause serious ecological and economic problems.
向井 貴彦, 西田 睦
2003年 50 巻 1 号 71-76
Phylogenetic relationships among 4 major geographic population groups (San-in-Biwa-Ise, East Seto, West Seto and West Kyushu) of Japanese freshwater goby
(Perciformes: Gobioidei: Odontobutidae) and related species
were inferred from partial nucleotide sequences of the mitochondrial 12S and 16S rRNA genes. The resultant mitochondrial DNA (mtDNA) phylogeny was consistent with that based on the previous allozyme analysis. This phylogeny showed that specimens from the Sagami River system in Kanagawa Prefecture, Kanto District, were extremely close to fish from the West Seto group, suggesting the formers to have been descended from individuals artifi-cially introduced from the range of the latters. Judging from the fact that about 40 individuals of the goby were easily collected by a person in 2 hrs, the Kanto popu-lation did not seem to be small, and thus might be disturbing the native fauna in the river system.
1960年 26 巻 1 号 1-8
In the Seto Inland Sea the conger eel,
(Brevoort) is a commercially important species to be caught by small sized trawlers. In the present work, growth of the fish has been studied on the basis of morphometric surveys conducted during 1952-56 for 1, 960 individuals from fishing grounds off Marugame and 1, 892 off Takuma (Table 1 and Fig. 1).
1) Frequency distribution of the anal length composition and seasonal changes in the modes (Figs. 2 and 3) have suggested that the fish under study consist of two major age groups: the young exploited during August to December and the older staying in the areas over the year. The field data indicated the average growth from summer to summer to be about 50mm.
2) Relation between total length (
) and anal length (
) of 400 specimens collected in 1956 may be expressed as
From the anal length composition obtained at Marugame during 1952-56, the mean anal length of the young and the older groups was separately computed for the coordinate months of the years (Table 3). The results revealed that the annual growth averages 50mm. in a close agreement with the one determined from the field data. However, the young group from Marugame was found a little different in the growth trend from that of Takuma (Fig. 4). The difference may be partly attributable to the particular topography of Takuma area where the tidal currents from the outer sea join each other and receed to different directions. According to the least square method, the growth of the conger eel in these areas may be formulated as follows:
For the young group occurring during August to December
For the older group occurring in early months of the following year
is anal length and
is age by ten day period.
3) In the conger eel under report, relation between body weight (
) and anal length (
) is indicated as in Fig. 5 and by a formula
Assuming that the fish complete their metamorphosis in a year after hatching, it is inferable that the conger eel in the areas are composed of the two-year-old and the three-year-old groups.
明仁親王, 目黒 勝介
1979年 26 巻 2 号 192-202
was established by Valenciennes (1837) with
Bloch as its type species.
was first established by Gill (1861) as a subgenus of the genus
Gill as its type species, and later raised to a generic level by Bleeker (1874).Since then the two generic names,
have been used for the type species of the genus
were insufficiently diagnosed by Gill (1861), Bleeker (1874 and 1876).and Koumans (1931), so that the characteristics given by them do not agree.
Our comprehensive study of the type species of the two genera,
(Heller et Snodgrass),
(Tanaka), Sicyopterus macrostetholepis (Bleeker),
(Grant) revealed that the characteristic differences of these species are divided into three levels as follows.The two species of the genus
and the five species of the genus
are distinguishable at level I.The characteristic differences between them are shown as A and B in Table 3.At level II on the one hand the two species of the genus
are distinguishable in that their characteristic differences are the presence or absence of a median cleft in the upper lip, of a fleshy tubercle behind the cleft, of the middle pore N of the preopercular canal, and of the ctenoid scales, which are expressed as C and D in Table 2.On the other hand
and the four other
of the genus
are distinguishable by the presence or absence of a median cleft in the upper lip, of the projections lining the edge of the upper lip, of a fleshy tubercle behind the cleft, of the ridge with protuberances inside the upper lip, by the tips of the teeth in the upper jaw being divided into two or three, by the presence or absence of the flapped lateral lower lip, and by the row of labial teeth being extended or not beyond the last tooth of the upper jaw, which are expressed as E and F in Table 2.At level III the four species of the genus
are distinguishable by the widely or closely set papillae between the band of papillae on the lower lip and the labial teeth, and the differences of fin ray and scale counts, which are expressed as G, H, I, and J in Table 2.Since the differences at level I are sufficiently remarkable to be of generic level, the genus
should be separated from the genus
, so that A and B in Table 3 become the diagnostic characters of the two genera.However, some of the characteristic differences shown in Table 3 might have to be omitted when more species of the two genera are examined.