著者

渡辺 勝敏 森 誠一

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.62, no.1, pp.69-72, 2015-04-25 (Released:2017-08-10)

参考文献数

21

被引用文献数

2

著者

藤本 泰文 高橋 清孝 進東 健太郎 斉藤 憲治 三塚 牧夫 嶋田 哲郎

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.68, no.1, pp.61-66, 2021-04-25 (Released:2021-05-14)

参考文献数

40

被引用文献数

2

著者

伴 和幸 髙見 宗広 冨山 晋一 福井 篤

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.60, no.2, pp.117-121, 2013-11-05 (Released:2015-12-26)

参考文献数

10

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Two chiasmodontid specimens (110.2–232.0 mm in standard length), collected off Shikoku, Japan, represent the first records of Kali colubrina Melo 2008 from Japanese waters, being distinguished from six congeneric species by the combination of a unique dentition pattern (two rows of recurved caniniform teeth on the premaxilla and dentary, not developed as fangs, 12–22 lateral and 5–9 mesial teeth on the premaxilla, 8–18 lateral and 5–10 mesial teeth on the dentary, mesial teeth larger than adjacent lateral teeth), 23–26 second dorsal-fin rays, 23–25 anal-fin rays and 39–41 vertebrae. The new Japanese name “Jaguchi-bouzugisu” is proposed for the species.

著者

井藤 大樹 庄野 耕生 瀬能 宏

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.22-029, (Released:2023-01-16)

参考文献数

32

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A single juvenile specimen (93.2 mm standard length) of the rare syngnathid fish Microphis (Coelonotus) argulus, collected from the Uchizuma-gawa River, Tokushima Prefecture, Shikoku Island, Japan, is the first record from Shikoku Island and northernmost record of the species. We newly found that M. (C.) argulus is distinguished from M. (C.) leiaspis in the fresh juvenile specimens by the following combination of characters: jaws to snout reddish (vs. brownish in the latter); small white dots present from behind eye to pectoral-fin base (vs. absent); operculum and pectoral-fin base brownish (vs. silverywhite). The M. (C.) argulus specimen may have been transported northward by the Kuroshio Current from the usual distribution range of the species, and recruited to the Uchizuma-gawa River.

著者

馬渕 浩司 林 公義 Thomas H. Fraser

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.62, no.1, pp.29-49, 2015-04-25 (Released:2017-08-10)

参考文献数

57

被引用文献数

3

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A recent revision of the systematics of the family Apogonidae recognized four (two being new), 14 tribes (all new) and 38 genera, one of which was new. Apogon or Rhabdamia, Apogonichthyoides, Nectamia sensu stricto Zoramia. All apogonid subfamilies, tribes and genera occurring in Japanese waters are given fixed standard Japanese names. Based on the rules operationally proposed twenty-five new standard Japanese names were given to three subfamilies, 13 tribes Japanese name (at generic level for , subfamily and tribe level taxa, and a specific level for genera) being designated Additionally, a new standard Japanese Senou-hikari-ishimochi, was proposed for a Japanese species, Siphamia senoui,

著者

宇田川 伸吾 矢田 文 竹村 明洋

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.65, no.1, pp.49-57, 2018 (Released:2018-04-25)

参考文献数

21

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ScaleCUBIC-1, the newly-developed reagent for tissue clearing and decolorization, was trialed on the Malabar grouper (Epinephelus malabaricus), goldlined spinefoot (Siganus guttatus), and sapphire devil (Chrysiptera cyanea). After perfusion fixation with 4% paraformaldehyde (PFA) from the caudal vein of the Malabar grouper, tissues (brain, heart, spleen, liver, intestine, gill, eyes, and muscle) were dissected and post-fixed in 4% PFA at 4˚C for 24 hrs, before being immersed in ScaleCUBIC-1. Subsequently, the brain, spleen, intestine, gill, and muscle (but not skin or scale) were found to have been completely cleared, and the heart and liver partially so. Due to the thickness of the organ, deeper regions of the liver were not cleared. The failure of eye-clearing and decolorzation was partially due to pigmentation of the former. Similar results were obtained for tissues of the juvenile goldlined spinefoot and mature sapphire devil, following immersion in ScaleCUBIC-1 for 5 days. Whole body cleaning and decolorzation were also trialed on the goldlined spinefoot and sapphire devil. Following removal of the scales and skin, the immersion of specimens in ScaleCUBIC-1 for 14 days resulted in successful clearing and decolorzation of the muscles of both species. It was concluded that ScaleCUBIC-1 is suitable for clearing and decolorzation of fish tissues, including whole body, although modifications in the procedure may be required for different fish species.

著者

山野上 祐介 馬渕 浩司 澤井 悦郎 坂井 陽一 橋本 博明 西田 睦

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.57, no.1, pp.27-34, 2010 (Released:2014-03-05)

参考文献数

22

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Morphological identification of two ocean sunfish species (genus Mola) is not an easy task due to the giant body size and poor understanding of their intraspecific variation. A rapid, reliable method of identifying mitochondrial DNA from two Mola species in Japanese waters was designed for PCR-based genotyping of the mitochondrial control region. Two allele-specific primers were developed for the mitochondrial control region of each species: CRMolaAL and CRMolaBL for Mola spp. A and B, respectively. Using the same reverse primer (H884-12S), specific primers for Mola spp. A and B were designed to amplify ca. 400- and 500-bp fragments, respectively. A pair of fish universal primers (L1969- 16S and H2582-16S) amplifying ca. 700 bp was used as an internal control. Multiplex PCR reactions including these five primers produced a species-specific fragment for either Mola sp. A or B with an internal control. This approach has major advantages over other molecular species-identification methods in speed and costefficiency, and greatly helps in determining Mola species.

著者

鶴見 真治 清藤 秀理 中山 直英

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.22-016, (Released:2022-10-05)

参考文献数

31

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The rare barracudina Lestidium bigelowi Graae, 1967 was reported for the first time from the northwestern Pacific, based on four specimens collected from the vicinities of Okino-torishima Island, Japan, and Guam, at depths of 85–150 m. Previous records of the species had been limited to east of the Seychelles in the western Indian Ocean (type locality), the eastern Pacific off Colombia, and the southwestern Pacific off New Caledonia. Lestidium bigelowi is the only paralepidid species known to have six small, round, discrete mid-ventral luminescent organs, evenly spaced from the isthmus to near the anus, whereas in other species of the family, the luminescent organ is absent or represented by an elongate slender duct (s) extending along the mid-ventral line from the chest to the anus. The following characters are also useful to distinguish the species from its congeners: dorsal fin origin and outer pelvic-fin base more-or-less vertically level, anal-fin rays 28–30, vertebrae 80 or 81, predorsal fin length 54.3–56.5% of standard length (SL), and prepelvic fin length 53.7–56.3% of SL. Because L. bigelowi was previously known only from juveniles, the morphology of much larger individuals (72.3–123.7 mm SL) is described herein. Two specimens collected southwest of Okino-torishima Island represent the first record of L. bigelowi in Japanese waters (within the Exclusive Economic Zone). The new standard Japanese name “Botan-namehadaka” is proposed for the species, being derived from the button-like luminescent organs (“botan”) and the Japanese name for barracudina (“namehadaka”).

著者

粟生 恵理子 吉田 雄 Nishihara Gregory N. 石松 惇

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.21-037, (Released:2022-07-25)

参考文献数

48

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We demonstrate monthly changes in the distribution of a population of the mudskipper Periophthalmus modestus inhabiting a mud bank of the Fukushoe River, flowing into the Ariake Sea, Japan. During the reproductive season from June to midAugust, fish density observed on the surface during lowest spring tide decreased from the most landward quadrats toward the river channel, particularly where the bank inclination was steep (within 30 m from the water’s edge). Males accounted for over 90% of individuals collected at the most landward sampling plot, 67 to 15% at the next three plots, and 0% at the most riverward plot, where only females were collected. During the non-reproductive season from September to November, fish density also decreased toward the river channel, with no fish confirmed at the river’s edge. Although the percentage of males decreased from landward to riverward plots, the trend was less marked than during the reproductive season. Monthly sampling of fish on riprap at the time of highest spring tide showed females to be dominant (70–90% of total) from May to July, with juveniles appearing in July and becoming dominant (70–80%) in August to October. No fish occurred on the riprap from November to the end of January. These findings suggest that many females migrate with the tide for feeding at the water’s edge, thereby achieving rapid ovarian development, whereas mature males remain near their territory and burrows. Reproductive burrows were most abundant in the area of stable daily periods of submersion and emersion (300 min and 400–500 min, respectively) throughout the tidal cycle, suggesting that a regular cycle of inundation and emersion is important for the successful reproduction of the species.

著者

早川 洋一 瀧田 真平 菊池 一也 吉田 彩夏 小林 牧人

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.59, no.2, pp.111-124, 2012-11-05 (Released:2014-12-02)

参考文献数

39

被引用文献数

2

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The importance of olfaction in spawning of medaka Oryzias latipes was established for the first time by observation of spawning behavior by fish subjected to an olfactory blockage. Experimental fish were prepared by (1) covering the nostrils on both sides (bilateral treatment), thereby excluding all olfactory stimuli, and (2) covering nostrils on one side only (unilateral treatment), thereby giving partial exclusion. A control group comprised untreated (intact). Experiments conducted for both males (bilateral male-intact female, unilateral male-intact female and intact male-intact female) and females (bilateral female-intact male, unilateral female-intact male and intact female-intact male) resulted in no spawning by intact females paired with bilateral males, whereas spawning occurred in intact females paired with both unilateral and intact males. Spawning also occurred when intact males were paired with intact, unilateral or bilateral females, indicating that olfactory stimuli were necessary for males to complete spawning, but not so for females. Spawning acts exhibited from pairing started by bilateral males-intact female pairs included “following” (initial act of following female), “positioning” (lateral courtship display), and “quick circle” (turning in front of female), but they did not include “contact” (bodies in contact posteriorly prior to gamete release), “wrapping” (male embracing female using their dorsal and anal fins during gamete release). On the other hand, intact and unilateral males participated in all of the above spawning acts, indicating that olfactory stimuli are indispensable for behavior concerning emitting semen.

著者

藤原 恭司 伊東 正英 本村 浩之

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.64, no.2, pp.107-112, 2017-11-25 (Released:2018-06-19)

参考文献数

14

被引用文献数

3

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A single female specimen (256.4 mm standard length) of Acanthopagrus taiwanensis Iwatsuki and Carpenter, 2006, collected off Kasasa, Minami-satsuma, Kagoshima Prefecture, Japan, was characterized by the following combination of characters: 3½ scale rows between fifth dorsal-fin spine base and lateral line; 3 or 4 oblique scale rows on cheek; modally 15 total gill rakers; 3 or 4 rows of flattened molars on each side of upper and lower jaws; second anal-fin spine robust, bluntly pointed; ventral edge of infraorbitals above maxilla nearly straight; anterior edge of dorsal scaly area of head rounded; no black bars on head; a dark streak on each membrane of anal fin; and anal-fin soft rays whitish. The dorsal- head profile of the Japanese specimen was relatively straight, compared with the convex profile in the type specimens of the species. Other characters of the Japanese specimen, however, agreed well with those of A. taiwanensis given in the original description. Acanthopagrus taiwanensis is very similar to A. pacificus Iwatsuki, Kume and Yoshino, 2010, but can be distinguished from the latter by having 3 or 4 oblique scale rows on the cheek (vs. 6 or 7 in the latter), modally 15 total gill rakers (vs. 17), flattened molar teeth on each side of the upper and lower jaws (vs. rounded molariform teeth), a robust, relatively bluntly pointed second anal-fin spine (vs. acutely pointed), and whitish anal-fin soft rays (vs. blackish). Acanthopagrus taiwanensis has been previously recorded only from Taiwan, the Kagoshima specimen representing the first record from Japan and northernmost record for the species. The new standard Japanese name “Iwatsukikurodai” is proposed for the species and distributional implications of A. taiwanensis in Japanese waters discussed.

著者

生駒 歩 戸田 竜哉 長崎 哲新 河村 功一

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.69, no.1, pp.7-20, 2022-04-25 (Released:2022-05-06)

参考文献数

59

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Genetic characteristics of the Japanese torrent catfish Liobagrus reinii in the Miya River and neighboring drainages were investigated, using mtDNA and eight microsatellite (MS) markers, to evaluate the effects of man-made river structures on the distribution and genetic structure of the species. A total of 23 mtDNA haplotypes were detected, forming a star-like haplotype network, in which the population in the upper reaches (URM) formed a unique group. Many populations in tributaries of the middlelower reaches (MLRM) included unique haplotypes, although they shared a common haplotype located at the center of the network. MS markers indicated that genetic diversity tended to decrease upstream in the tributaries, coupled with a decline in effective population size and the existence of genetic bottlenecks. These phenomena were especially evident in tributaries isolated with weirs or dams. The fixation index RST, the values of which were smaller than FST, indicated isolation by distance (Mantel test), genetic differentiation among populations having occurred in recent years. Although a Bayesian-based assignment test showed unique clusters in the populations of isolated tributaries, including the URM population, many MLRM populations shared an admixture of multiple clusters, probably resulting from the dispersal of L. reinii. These results indicated that L. reinii in the Miya River included two conservation units, in the upper and middle-lower reaches, respectively. Man-made river structures seem to have caused fragmentation of the distribution of the species, resulting in small tributary populations suffering from genetic deterioration. In drainages neighboring the Miya River, the Isezi River population of L. reinii seems to be indigenous, owing to unique genetic characteristics in mtDNA and MS, whereas the sharing of genetic characteristics with the URM population of the Miya River indicated that the Akaba River population is likely to have been introduced from the Miyagawa Reservoir.

著者

大橋 慎平 今村 央 矢部 衞

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.60, no.2, pp.111-116, 2013-11-05 (Released:2015-12-26)

参考文献数

23

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Two specimens (131.5 and 147.0 mm in standard length) of the Gelatinous Blindfish Aphyonus gelatinosus Günther, 1878, collected from southern Japan (Kumano Sea and near the Tori Island, part of the Izu Island chain), were found among preserved specimens held by the Department of Natural Science, Faculty of Science, Kochi University, Kochi, Japan and National Museum of Nature and Science, Tsukuba, Japan. Aphyonus gelatinosus is recognizable in having only a single pelvic fin ray, high numbers of dorsal fin rays (92–118) and caudal vertebrae (46–55), few long gill rakers (3–4), and short predorsal length (26.5–30.5% SL). This species and genus is known from the Pacific Ocean, but not from the north Pacific including Japanese waters. Thus, these specimens are a new record of both the genus Aphyonus and A. gelatinosus for Japan.

著者

向井 貴彦 瀬能 宏

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.57, no.1, pp.75-76, 2010 (Released:2014-03-05)

参考文献数

7

著者

福地 伊芙映 立原 一憲

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

2022

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<p>The Daito (Borodino) islands, comprising three riverless oceanic islands (Minami-daito, Kita-daito and Oki-daito Islands) mostly bounded by rocky coasts, are the only southern Japanese islands located between the Ryukyu Archipelago and the Ogasawara islands. Identification of the mullet fauna on such oceanic islands should provide a clue to the dispersal ability of the family. Field surveys at Minami-daito and Kita-daito Islands were conducted in October 2019 and March 2020 resulting in five (<i>Chelon macrolepis</i>, <i>Crenimugil crenilabis</i>, <i>Ellochelon vaigiensis</i>, <i>Mugil cephalus</i>, <i>Oedalechilus labiosus</i>) and four mugilid species (<i>Ch. macrolepis</i>, <i>Cr. crenilabis</i>, <i>Neomyxus leuciscus</i>, <i>O. labiosus</i>) being collected from the respective islands. In addition, a specimen of <i>Moolgarda seheli</i> previously collected from Minami-daito Island, was found in the collection of the National Museum of Natural and Science (NSMT). All seven mugilid species are here recorded for the first time from the Daito Islands, supported by voucher specimens. A detailed description is provided for each species.</p>

著者

北村 淳一

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.58, no.2, pp.195-198, 2011 (Released:2014-03-07)

参考文献数

10

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Freshwater mussel (family Unionidae) utilization for oviposition by Sarcocheilichthys variegatus variegatus was investigated in a drainage ditch and the Harai River. Twenty five freshwater mussels in Pronodularia japanensis (4% of 616 individuals examined) in a drainage ditch connected to the Kushida River hosted S. v. variegatus eggs, compared with none of two other freshwater mussel species, Inversidens brandti and Unio douglasiae douglasiae. In the Harai River, eight freshwater mussels (3 I. brandti, 2 Obovalis omiensis, 1 Lanceolaria grayana and 1 Anodonta spp.) (2.7% of 290 individuals examined) hosted S. v. variegatus eggs, compared with none of P. japanensis and U. d. douglasiae. Among the available freshwater mussel species, U. d. douglasiae may be only one selected against for oviposition by S. v. variegates.

著者

佐藤 行人 西田 睦

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.56, no.2, pp.89-109, 2009 (Released:2014-03-05)

参考文献数

151

被引用文献数

1

著者

小枝 圭太

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

pp.21-032, (Released:2022-01-28)

参考文献数

51

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A single adult specimen (205.1 mm standard length) of Lined Butterflyfish, Chaetodon lineolatus Cuvier, 1831, collected in 1932 from Onahama, Fukushima Prefecture, northern Japan, was discovered in the fish collection of the Department of Zoology, the University Museum, the University of Tokyo. The previous northernmost Japanese record of the species being the Boso Peninsula, Chiba Prefecture, most records from southern Japan have been of juveniles. Accordingly, the present specimen represents the first record of the species from the cold-water area off northern Japan (northernmost record of the species), and indicates that at least limited dispersal of tropical fishes to northern Japan occurred in the 1930’s, when water temperatures were estimated to have been almost 2˚C lower than in recent years.

著者

上原 匡人 本永 文彦 太田 格 海老沢 明彦 宮岡 勇輝 立原 一憲

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.68, no.2, pp.129-142, 2021

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<p>The Indian mackerel <i>Rastrelliger kanagurta</i> is an important coastal fishery resource for Okinawa Prefecture, southwestern Japan. However, much is still unknown about its life history. The early development, occurrence, sexual maturation, and reproductive cycle of the species was examined from specimens collected from the coastal waters of Okinawa Island, and management of the fishery evaluated. Larvae [3.4 mm notochord length–12.5 mm standard length (SL)] and juveniles (11.4–16.2 mm SL) of <i>R. kanagurta</i> were distinguished from other mackerel species by: 1) numbers of myomeres, 2) absence of spines on the preopercle posterior margins, 3) positional relationship between the upper and lower jaw tips, 4) melanophore pattern, and 5) distribution (allopatric). Both larvae and juveniles occurred in the offshore epipelagic zone of Nakagusuku Bay in May, June, and August, which coincided with the occurrence of high-gonadosomatic value adults in coastal waters. However, specimens were not encountered in extremely shallow coastal areas (e.g., tidal flats), although younger individuals may utilize such the offshore epipelagic zone of the bay, attaining fork lengths (FL) of ca. 8 cm. Individuals mature at ca. 26 cm FL, one year after hatching. <i>R. kanagurta</i> are primarily caught by set net fishery near Okinawa, small (immature) individuals accounting for > 45% of netted individuals in all months, except May and June, during the period from April 1985 to April 1987, and for > 35% of the examined individuals in all months, except June and July, between April 2011 and March 2016. These results for both periods suggest growth overfishing. Accordingly, immature individuals must be conserved to sustain the Okinawan population of <i>R. kanagurta</i>.</p>

著者

上原 匡人 太田 格 海老沢 明彦 立原 一憲

出版者

一般社団法人 日本魚類学会

雑誌

魚類学雑誌 (ISSN:00215090)

巻号頁・発行日

vol.68, no.2, pp.93-107, 2021

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<p>Two closely related, commercially important threadfin breams, <i>Nemipterus furcosus</i> and <i>N. peronii</i>, are an essential coastal fishery resource in Okinawa Prefecture. The age, growth, reproductive cycle, and stomach contents from 124 <i>N. furcosus</i> and 37 <i>N. peronii</i>, obtained from November 2011 to December 2015, were examined, age being assessed from sectioned otoliths and gonadal histology. <i>Nemipterus furcosus</i> and <i>N. peronii</i> were the most abundant threadfin breams in Kin Bay and Nakagusuku Bay, Okinawa Island, areas including many coastal tidal flats, where the two species comprised 98.1% of the total number of <i>Nemipterus</i> individuals examined. Overall sex ratios of both species were significantly sex-biased, the apparent lack of transitional gonads implying functional gonochorism. The spawning seasons of both species were estimated as occurring between spring and fall, no immature fishes having been obtained. Age validation using edge-type analyses implied that opaque zones were formed once per year, being valid annual growth increments. Although no intersex differences in maximum length, growth equation, and age range were observed in <i>N. furcosus</i>, <i>N. peronii</i> females were larger and older than males. The greatest ages observed were 4.3 and 7.0 years for <i>N. furcosus</i> and <i>N. peronii</i>, respectively. Both species fed predominantly on crabs, which primarily occupied the inner bays. Over the previous 27 years, the catch per unit effort of <i>Nemipterus</i> has declined in the highly altered environments of Kin and Nakagusuku Bays, suggesting that the decline in the populations of these species at Okinawa Island may be due to coastal fishery practices, environmental decline, and the degradation of suitable habitats. The biological implications for conservation are discussed.</p>