Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s12526-022-01333-w

Scopus

Other Link： https://link.springer.com/article/10.1007/s12526-022-01333-w/fulltext.html

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Informa UK Limited  

DOI： 10.1080/14772000.2022.2118389

Scopus

Other Link： https://www.tandfonline.com/eprint/M7MV99WCNNQDCKUE4XJW/full?target=10.1080/14772000.2022.2118389

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：INTER-RESEARCH  

Epibenthic invertebrate assemblages in macroalgal beds generally show remarkable seasonal fluctuations in abundance and species composition, reflecting macroalgal host growth and defoliation. Notably, they often drastically decrease during macroalgal host defoliation. Though this reduction has been explained in terms of dispersal away from the macroalgal bed in relation to macroalgal host defoliation, this hypothesis has not previously been experimentally detailed. We conducted a field experiment using an imitation of Sargassum that was set 1 m away from a Sargassum yezoense bed to examine whether the epibenthic gammarids disperse away from the Sargassum bed as a result of Sargassum defoliation. The imitations were replaced monthly throughout the Sargassum defoliation season; subsequently, gammarids associated with the imitation (assumed as migrants from the Sargassum beds) as well as the gammarids that occurred in the Sargassum bed were investigated. Seasonal patterns of gammarid abundance in the Sargassum bed and their dispersal to the imitations were found to be quite different among gammarid species. In particular, 2 dominant gammarids, the suspension-feeding Jassa morinoi and Podocerus sp., drastically decreased in the Sargassum bed and coincidently increased in the imitations during the Sargassum defoliation season, indicating their defoliation-associated dispersal from the Sargassum bed. This is the first field experimental study demonstrating the defoliation-associated dispersal of epibenthic invertebrates in macroalgal beds. The dispersal is likely caused by a reduction of habitat space and quality due to thalli defoliation. Since many macroalgae show seasonal growth and defoliation, the concept of defoliation-associated dispersal is potentially applicable to various macroalgal species.

DOI： 10.3354/meps13903

Web of Science

Scopus

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Inter-Research Science Center  

Clarification of the biological and/or physical factors determining the location requirements for spawning aggregations is necessary for understanding the population dynamics of freespawning marine animals. We monitored the density of adult abalone Haliotis discus hannai on 2 types of artificial reefs with different heights (tall and short blocks) and the surrounding seabed area in Otsuchi Bay, northeast Japan, from February 2016 to December 2019. In addition, the number of neighboring adults located within a 50 cm radius from each individual was counted from March 2017 to December 2019. Algal succession in the 3 types of location (tall and small blocks, seabed) was monitored and compared with temporal fluctuations in adult abalone density. Our results show that the fluctuations in density were different among the 3 locations, especially during the spawning season (August-October). Ontall blocks, clear increases in adult abalone density and number of neighboring adults were confirmed during the spawning seasons in 2016 and 2019. In contrast, there was no clear increase in the adult density on small blocks and surrounding bottom areas. Aggregations on the tall blocks clearly differed among the 4 years, and the difference was considered to be influenced by differences in the macroalgal species and coverage during the spawning season. This is the first study to report that a difference in phenology among algal species is a key factor in the formation of spawning aggregations of a free-spawning marine animal.

DOI： 10.3354/meps13753

Web of Science

Scopus

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Cambridge University Press (CUP)  

<title>Abstract</title>The amathillopsid subfamily Cleonardopsinae Lowry, 2006 is reviewed. The only species of the subfamily, <italic>Cleonardopsis carinata</italic> K.H. Barnard, 1916, should be regarded as a species-complex. A new genus and species of the subfamily, <italic>Carinocleonardopsis seisuiae</italic> gen. et sp. nov., is described from the Sea of Kumano, Japan as the second species of the subfamily Cleonardopsinae as well as the first record of the subfamily from the North Pacific. This new genus can be easily distinguished from <italic>Cleonardopsis</italic> by the presence of distinct large eyes and the dorsal carination on head, pereonites and pleonites.

DOI： 10.1017/S0025315421000357

Scopus

Authorship：Last author   Language：Japanese  

Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)  

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：JAPANESE ASSOCIATION OF BENTHOLOGY  

<p>The anisogammarid amphipod <i>Jesogammarus</i>(<i>Jesogammarus</i>)<i>hinumensis</i> Morino, 1993 has been reported from south of Iwate Prefecture in Japan and Jeju Island in Korea. In this study, one male and one female of <i>J.</i>(<i>J.</i>)<i>hinumensis</i> were collected from the Imaizumi River flowing into the Lake Jusan, in the Tsugaru Peninsula of Aomori Prefecture in northern Honshu, Japan. This is the first record of <i>J.</i>(<i>J.</i>)<i>hinumensis</i> from the prefecture, representing the northernmost record. At the site, <i>J.</i>(<i>J.</i>)<i>hinumensis</i> was found under fallen leaves deposited at the roots of <i>Phragmites australis</i></p>

DOI： 10.5179/benthos.76.13

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Magnolia Press  

Two new species of Maera Leach, 1814 and Quadrimaera Krapp-Schickel &amp; Ruffo, 2000 included in the Maera-clade are described from Japan. Maera denticoxa sp. nov. was collected from Iwate and Hokkaido Prefectures and can be distinguished from its congeners by the small notches on the posteroventral margins of coxae 1–6. Quadrimaera angulata sp. nov. from north of Tanegashima Island in Kagoshima Prefecture is characterized by the distal tooth on the mandibular palp article 1, the rounded palm of the female gnathopod 2, and the angular posterodistal margin of the pereopod 7 basis. Keys to Japanese species of the Maera-clade are provided. In total, seventeen species included in the clade occur in Japan.

DOI： 10.11646/zootaxa.4885.3.2

PubMed

Other Link： https://www.biotaxa.org/Zootaxa/article/viewFile/65760/64202

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s12526-020-01100-9

Scopus

Other Link： http://link.springer.com/content/pdf/10.1007/s12526-020-01100-9.pdf

Language：Japanese   Publisher：Carcinological Society of Japan  

DOI： 10.18988/cancer.29.0_e136

Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)  

A pair of a gravid female and a male of Ceratothoa oxyrrhynchaena Koelbel, 1878 (Isopoda: Cymothoidae) were collected from the buccal cavity of a blackthroat seaperch, Doederleinia berycoides (Hilgendorf, 1879) (Perciformes: Acropomatidae), in the western North Pacific Ocean off Kinkasan Island, Miyagi Prefecture, northeastern Japan. This expands the geographical distribution range of C. oxyrrhynchaena from off Onahama (ca. 37°N), Fukushima Prefecture, northward to off Kinkasan Island (38°17′N) and represents the first record of the species from the southern subarctic waters. Based on the previous and present records of C. oxyrrhynchaena from Japan, the species is suggested to occur in a wide area ranging from the subtropical through temperate to southern subarctic waters.

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1017/S002531541900105X

Other Link： https://doi.org/10.1017/S002531541900105X

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Inter-Research Science Center  

Macroalgal beds can be vertically differentiated into canopy and understory strata, and each can exhibit different phenology in algal biomass and morphology. Thus, for epibenthic invertebrates, macroalgal beds provide both vertically and seasonally heterogenous habitats, and epibenthic assemblages can be predicted to show different patterns of seasonal dynamics reflecting the different effects of algal phenology between the canopy and understory. We described and compared the seasonal dynamics of gammarid assemblages and algal phenology in the canopy and understory of a Sargassum bed in Otsuchi Bay, Japan. Gammarid assemblages showed distinctly different seasonal dynamics in abundance and species composition between the 2 habitats. In the canopy, gammarid abundance peaked in July, which was mainly explained by fluctuations in abundance of the dominant tube-dwelling filter-feeder Jassa morinoi. In the understory, gammarid abundance peaked in August-September, clearly later than in the canopy, and was also dominated by tube-dwelling filter-feeders, but different species such as Monocorophium uenoi and Gammaropsis japonicus. These differences in assemblage dynamics of gammarids can be explained by the Sargassum defoliation in late summer, resulting in decreased habitat space and complexity for gammarids in the canopy. In the understory, however, Sargassum defoliation increased the amount of detrital deposition, providing food sources and additional habitat for gammarids. This study demonstrates that algal phenology can have strong but different effects on epibenthic invertebrates inhabiting canopy and understory strata.

DOI： 10.3354/meps13194

Web of Science

Other Link： https://doi.org/10.3354/meps13194

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Brill  

<title>Abstract</title>
The ischyrocerid amphipod <italic>Ventojassa dentipalma</italic> Kim &amp; Kim, 1991 was recently collected from Otsuchi Bay, northeast Japan. The present specimens represent the second record of the species as well as the first Japanese record of the genus. Brief morphological descriptions and line drawings of diagnostic characters are provided. Details of the characters distinguishing the species from <italic>V. ventosa</italic> (Barnard, 1962) are discussed.

DOI： 10.1163/15685403-00003923

Other Link： https://brill.com/view/journals/cr/92/8/article-p1007_8.xml

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1093/jcbiol/ruy098

Other Link： https://academic.oup.com/jcb/advance-article/doi/10.1093/jcbiol/ruy098/5280210?guestAccessKey=6eeb0893-ef19-46fd-9d07-d33425911483

Language：English   Publishing type：Research paper (scientific journal)  

Other Link： http://w3.u-ryukyu.ac.jp/naruse/lab/Contents_J_files/45-3_Kodama_Kawamura.pdf

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.dib.2018.07.031

Other Link： https://www.sciencedirect.com/science/article/pii/S2352340918308047

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Estuarine, Coastal and Shelf Science  

Various aspects of plant diversity such as species diversity and phylogenetic diversity enhance the species diversity of associated animals in terrestrial systems. In marine systems, however, the effects of macrophyte diversity on the species diversity of associated animals have received little attention. Here, we sampled in a subtropical seagrass-seaweed mixed bed to elucidate the effect of the macrophyte phylogenetic diversity based on the taxonomic relatedness as well as the macrophyte species diversity on species diversity of mobile epi-benthic invertebrates. Using regression analyses for each macrophyte parameter as well as multiple regression analyses, we found that the macrophyte phylogenetic diversity (taxonomic diversity index: Delta) positively influenced the invertebrate species richness and diversity index (H′). Although the macrophyte species richness and H′ also positively influenced the invertebrate species richness, the best fit model for invertebrate species richness did not include them, suggesting that the macrophyte species diversity indirectly influenced invertebrate species diversity. Possible explanations of the effects of macrophyte Delta on the invertebrate species diversity were the niche complementarity effect and the selection effect. This is the first study which demonstrates that macrophyte phylogenetic diversity has a strong effect on the species diversity of mobile epi-benthic invertebrates.

DOI： 10.1016/j.ecss.2018.03.020

Scopus

Other Link： https://www.sciencedirect.com/science/article/pii/S0272771417308946

Language：English   Publishing type：Research paper (international conference proceedings)  

Other Link： http://www.biodiversityjournal.com/pdf/8(2)_391-688.pdf#page=81

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1163/15685403-00003676

Other Link： https://brill.com/view/journals/cr/90/5/article-p639_10.xml

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.11646/zootaxa.4169.1.6

PubMed

Other Link： https://www.mapress.com/j/zt/article/view/zootaxa.4169.1.6

Country：Japan

Country：Japan

Country：Japan

Country：Japan

Country：Japan