- 著者
- Taiga Kunishima Herminie P. Palla Katsunori Tachihara Ken Maeda
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.27, no.1, pp.129-138, 2022-04-15 (Released:2022-04-15)
- 参考文献数
- 48
- 被引用文献数
- 1
Twenty specimens of Acentrogobius ocyurus (Jordan and Seale, 1907) were collected in Manko, Okinawa-jima Island, Japan and Sulu Sea side of Puerto Princesa City, Palawan Island, Philippines. As the species had previously been reported from the South China Sea, Andaman Sea, and northern Australian waters, these specimens from Okinawa and Palawan represent the first records of the species from Japan and the Sulu Sea. Acentrogobius ocyurus was found on muddy substrata at the lowest tidal zone of the mudflat and was often found in burrows of mangrove pistol shrimp, Alpheus richardsoni Yaldwyn, 1971. Morphological traits suggested that A. ocyurus is closely related to A. globiceps (Hora, 1923), A. kranjiensis (Herre, 1940), and Acentrogobius sp. (“Suzume-haze” in Japanese name), with several homologous features including, the transverse pattern of the sensory papillae on the cheek, caudal fin pointed in middle, a black stripe behind the eye along the anterior oculoscapular canal, bright blue spots laterally on the body, and an oblique yellow stripe across the upper part of the caudal fin.
- 著者
- Taiga Kunishima Ken Maeda Ryutei Inui Yusuke Hibino
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.26, no.2, pp.343-349, 2021-10-14 (Released:2021-10-14)
- 参考文献数
- 34
- 被引用文献数
- 2
A single specimen of Muraenichthys gymnopterus (Bleeker, 1853) was collected from a sandy intertidal flat having rocks and dead corals in the estuarine area of Nagura Amparu, Ishigaki-jima Island, southern Japan, in October 2020. This specimen collection constitutes the first record of M. gymnopterus from Japanese waters. In this study, the diagnostic characters between M. gymnopterus and M. hattae Jordan and Snyder, 1901 are provided, based on our morphological observations of 37 specimens, including Okinawan specimen, and previous studies, as follows: head length [M. gymnopterus 11.8–15.0% of total length (TL) vs. M. hattae 9.4–11.0%], trunk length (24–25.4% of TL vs. 28–31%), the horizontal distance from the dorsal-fin origin to a vertical line through the anus 73–87% of head length vs. 13–49%), the number of vertebrae (total 129–130 vs. 148–155; predorsal 30 vs. 47–53; preanal 41–44 vs. 51–55), the number of the lateral-line pores before the anus (43–45 vs. 51–55). Additionally, the body depth at the gill opening in TL and the trunk length in TL can also be used to distinguish between these two species (2.8–3.7% of TL vs. 1.4–3.0%). Although M. gymnopterus has previously been reported from tropical to temperate regions, we suspect that the records from temperate regions are based on misidentification of M. hattae.
- 著者
- Taiga Kunishima Ryosuke Tanaka Kentarou Hirashima Ken Maeda
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.26, no.1, pp.37-41, 2021-03-05 (Released:2021-03-05)
- 参考文献数
- 29
One female specimen of Stiphodon multisquamus Wu and Ni, 1986 was collected from Arida-gawa River, Wakayama Prefecture, Japan, in November 2018. As the previously known range of this species was from the South China Sea, including Malaysia, Vietnam, and China, to the Ryukyu Archipelago in Japan, this specimen was reported as the first record from the Japanese mainland and the northernmost record of this species. Stiphodon multisquamus is an amphidromous fish of which pelagic larvae develop in marine habitats. It was believed that this specimen was transported from the southern region by ocean currents during the pelagic larval phase and recruited into the river in Wakayama Prefecture.
- 著者
- Yusuke Yamana Taiga Kunishima Masami Obuchi Takuma Fujii
- 出版者
- The Plankton Society of Japan, The Japanese Association of Benthology
- 雑誌
- Plankton and Benthos Research (ISSN:18808247)
- 巻号頁・発行日
- vol.15, no.2, pp.168-177, 2020-05-27 (Released:2020-05-30)
- 参考文献数
- 11
- 被引用文献数
- 3
With a focus on building an inventory of subtropical species of epifaunal holothurians and completing an environmental assessment, SCUBA surveys were carried out in the Amami Islands of Kagoshima Prefecture in southern Japan. The following 12 nominal species belonging to seven genera (subgenera), as well as two as yet undescribed species belonging to two genera, were observed: Bohadschia argus Jäger, 1833; B. bivittata Mitsukuri, 1912; B. vitiensis (Semper, 1867); Holothuria (Halodeima) atra Jäger, 1833; H.(H.) edulis Lesson, 1830; Holothuria (Microthele) nobilis (Selenka, 1867); Personothuria graeffei (Semper, 1867); Stichopus chloronotus Brandt, 1835; S. hermanni Semper, 1867; S. naso Semper, 1867; Thelenota anax H.L. Clark, 1921; Euapta sp.; Synapta maculata (Chamisso et Eysenhardt, 1821); and Opheodesoma sp. In the semi-closed waters around the Amami Islands, epifaunal holothurians showed what seemed to be species-specific distribution patterns related to topographical features. Furthermore, ignition loss values of feces and sediments suggested that selective deposit feeding may be predominant in at least several of the species sampled.
- 著者
- Taiga Kunishima Katsunori Tachihara
- 出版者
- The Plankton Society of Japan, The Japanese Association of Benthology
- 雑誌
- Plankton and Benthos Research (ISSN:18808247)
- 巻号頁・発行日
- vol.13, no.1, pp.21-24, 2018-02-28 (Released:2018-03-14)
- 参考文献数
- 11
- 被引用文献数
- 2 2
Accurately determining the species richness and/or abundance using quantitative sampling methods is important for understanding community structures. The quadrat method has been one of the most commonly used quantitative methods for estimating benthic animals in tidal flats. However, it is difficult to implement this method in biodiversity surveys of benthic fishes, as they can move across the quadrat, thus altering the observations. In the present study, we introduced the quantitative sampling method for benthic fishes in tide-pools located in tidal flats by employing an improved quadrat with a net and sinkers. This setup prevented the movement of fishes across quadrats, unlike the conventional quadrat method which allowed the easy movement of fishes. This improved quadrat method can be useful in surveying fish biodiversity in tide-pools in a wide range of tidal flats. The potential advantages of this method include 1) determining the accurate biodiversity of fishes in a tidal flat tide-pool, 2) easily comparing the biodiversity per unit area among multi-sampling sites, and 3) easily increasing the number of quadrats in field surveys. We believe that our improved quadrat method will simplify and promote the study of fishes in tidal flats.