Plankton & Benthos Research最新文献_第10页

A new species of box jellyfish, Carybdea wayamba sp. nov. (Cnidaria: Scyphozoa: Cubomedusae: Carybdeidae) from Sri Lanka 斯里兰卡箱形水母Carybdea wayamba sp. nov.一新种(刺胞纲:孢子虫纲:绒足水母科:绒足水母科)

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-11-18 DOI: 10.3800/pbr.15.317

K. Karunarathne, M. Croos

{"title":"A new species of box jellyfish, Carybdea wayamba sp. nov. (Cnidaria: Scyphozoa: Cubomedusae: Carybdeidae) from Sri Lanka","authors":"K. Karunarathne, M. Croos","doi":"10.3800/pbr.15.317","DOIUrl":"https://doi.org/10.3800/pbr.15.317","url":null,"abstract":": A new species of box jellyﬁsh, Carybdea wayamba sp. nov. is described here based on forty specimens collected from the south and northeast coasts of Sri Lanka, with the type location being Bonavista Reef, Galle Bay. This species is classiﬁed in the genus Carybdea due to the possession of a typical heart-shaped rhopaliar niche ostia with only one upper scale and epaulette-shaped gastric phacellae in the four corners of the stomach. This new species can be distinguished from other valid members of the genus Carybdea by the combination of the structure of the two velarial canal roots per octant with one broadly bi-forked velarial canal with narrow, lateral lobations on each root, and other morphological characters such as having typical knee-shaped pedalial canal bends without any appendages, and epaulette-shaped gastric phacellae with single-rooted, brush-shaped, multiple (three to ﬁve) short-stemmed, dendritically branched (both short and long branches) gastric ﬁlaments. This is the ﬁrst novel cubomedusa described from Sri Lankan waters; and the ﬁrst Carybdea species described with material from the North Indian Ocean.","PeriodicalId":56054,"journal":{"name":"Plankton & Benthos Research","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44538292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Duobrachium sparksae (incertae sedis Ctenophora Tentaculata Cydippida): A new genus and species of benthopelagic ctenophore seen at 3,910 m depth off the coast of Puerto Rico Duobrachium sparksae（incertae sedis Ctenophora Tentaculata Cydipida）：在波多黎各海岸3910米深处发现的底栖栉水母的一个新属和新种

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-11-18 DOI: 10.3800/pbr.15.296

M. Ford, N. Bezio, A. Collins

{"title":"Duobrachium sparksae (incertae sedis Ctenophora Tentaculata Cydippida): A new genus and species of benthopelagic ctenophore seen at 3,910 m depth off the coast of Puerto Rico","authors":"M. Ford, N. Bezio, A. Collins","doi":"10.3800/pbr.15.296","DOIUrl":"https://doi.org/10.3800/pbr.15.296","url":null,"abstract":"On April 10, 2015, three individuals of an undescribed species of ctenophore were observed moving just above the seafloor in the Arecibo Amphitheater inside the Guajataca Canyon, north-northwest of Puerto Rico at a depth of approximately 3,900 m. The ctenophore is distinctive; having two prominent tentacle arms, a body that is rectangular when observed laterally along the tentacular plane, and rounded when observed laterally along the stomodeal plane. The tentacle arms each give rise to an extensible tentacle bearing short tentilla of uniform length and distribution. One ctenophore appeared to be anchored to the seafloor by its two long flexible tentacles, as well as by two filaments exiting its oral end. The overall form of the ctenophore suggests classification within the problematic, non-monophyletic order Cydippida, but the robust tentacle arms are more reminiscent of benthic species of Platyctenida, particularly those of families Lyroctenidae and Ctenoplanidae. Whereas most platyctenid ctenophores do not possess ctene rows in their adult forms, features that are possessed by the new species described herein, species of Ctenoplanidae retain comb rows as adults and are capable of limited swimming. The species described herein is easily distinguishable from all other known species of Ctenophora and may trace its origin to a lineage diverging near the origin of Platyctenida.","PeriodicalId":56054,"journal":{"name":"Plankton & Benthos Research","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47962120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

New record of Linuche draco (Scyphozoa, Coronatae, Linuchidae) from Japan 日本龙舌兰新记录（Scyphozoa，Coronatae，龙舌兰科）

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-11-18 DOI: 10.3800/pbr.15.327

S. Toshino

引用次数: 0

A new record of Lynceus brachyurus Müller, 1776 (Laevicaudata: Lynceidae) from the Shiretoko Peninsula, Northeast Japan 文章标题日本东北知子半岛月蝉属(Lynceus brachyurus m<e:1>)新纪录，1776(月蝉科)

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-11-18 DOI: 10.3800/pbr.15.334

Norihito Takahashi

引用次数: 0

Settlement patterns of two sesarmid megalopae in the Sai River Estuary, Ishikawa Prefecture, Japan 日本石川县西河口两种芝麻籽类的聚落模式

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-11-18 DOI: 10.3800/pbr.15.306

Takehiro Matsumoto, Hiroaki Arakawa, T. Murakami, S. Yanai

{"title":"Settlement patterns of two sesarmid megalopae in the Sai River Estuary, Ishikawa Prefecture, Japan","authors":"Takehiro Matsumoto, Hiroaki Arakawa, T. Murakami, S. Yanai","doi":"10.3800/pbr.15.306","DOIUrl":"https://doi.org/10.3800/pbr.15.306","url":null,"abstract":"Two semi-terrestrial crab species, Chiromantes haematocheir and Chiromantes dehaani, are closely related and have a sympatric distribution. The ecological characteristics of these species, including habitat and behavior during the adult stage, have been investigated. However, the larval stage remains poorly understood because it is difficult to identify larvae morphologically. Our study objectives are to clarify the settlement patterns involved in recruitment of the two species of megalopae using genetic analysis and the effects of ecological factors on settlement, including 1) seasonal changes, 2) spatial variations (dominated by conspecific or heterospecific adults), and 3) tidal effects. The Chiromantes megalopae were collected in the lower reach of the Sai River during spring and neap tides from August to November 2017. Megalopa larvae were collected from three areas: one dominated by C. haematocheir adults, one dominated by C. dehaani adults, and a revetment area. Both species of megalopae showed seasonal and spatial variations in settlement, which also differed with tidal fluctuations. Chiromantes dehaani megalopae settled from midAugust to early October and C. haematocheir megalopae settled from early September to early November. Chiromantes haematocheir megalopae preferentially settled in the area dominated by conspecific adults over the area dominated by C. dehaani and the revetment area, while no difference in the settlement of C. dehaani megalopae was observed among areas. Chiromantes haematocheir megalopae returned on the spring tide; however, C. dehaani megalopae showed no tidal pattern.","PeriodicalId":56054,"journal":{"name":"Plankton & Benthos Research","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42105226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A sea pen field in shallow water in the Amakusa Islands, southern Japan 在日本南部的Amakusa群岛的浅水中的一个海围栏

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-08-14 DOI: 10.3800/pbr.15.259

Yuka Kushida, H. Kise, C. McFadden, J. Reimer

{"title":"A sea pen field in shallow water in the Amakusa Islands, southern Japan","authors":"Yuka Kushida, H. Kise, C. McFadden, J. Reimer","doi":"10.3800/pbr.15.259","DOIUrl":"https://doi.org/10.3800/pbr.15.259","url":null,"abstract":": Sea pens are ecologically important habitats for associated marine organisms, serving as ecosystem engi neers in sandy or muddy seaﬂoor environments. In such areas, sea pens can form habitats with high population densi ties known as “ sea pen ﬁelds ” . However, the presence and importance of sea pen ﬁelds have not been well studied in shallow waters in East Asia. Here, we report a sea pen ﬁeld of Virgularia sp. aﬀ. gustaviana in the shallow waters of Ushibuka Marine Park, in the Amakusa Islands of southern Japan. The average colony numbers of the ﬁeld across all depths (7–20 m) was 10.3 colonies/m 2 (live colonies) to 13.6 colonies/m 2 (all: live + dead colonies + holes), and the area of the sea pen ﬁeld was at least ∼ 50,000 m 2 . At a depth of 15 m, the substratum consisted of sand and fallen leaves of terrestrial origin, and the highest sea pen density was observed (averages = 17.2 live colonies/m 2 , = 25.8 total (live + dead + holes) colonies/m 2 ). At a depth of 20 m, the substratum consisted of broken shells and rocks and had the lowest density (live colonies: average = 0.8 colonies/m 2 , all: average = 1.0 colonies/m 2 ). There were signiﬁcant diﬀer ences in colony number of Virgularia sp. aﬀ. gustaviana between the “ sand ” , “ sand + leaves ” , and “ broken shells/rocks ” substrates. We hypothesize that the strength of the water currents caused by local geographic features and tidal move ments produce suitable sedimentation and habitat for this species of sea pen. Therefore, we suggest that preserving the natural coastline is crucial to protect this and other sea pen ﬁelds in shallow waters and their benthic marine communi ties.","PeriodicalId":56054,"journal":{"name":"Plankton & Benthos Research","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41509312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A new species in the subgenus Javanisomysis in the genus Anisomysis (Crustacea: Mysida: Mysidae) for specimens collected from Lombok Island, Indonesia Anisomysis属Javanisomysis亚属的一个新种（甲壳纲：Mysida:Mysidae），采集自印度尼西亚龙目岛的标本

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-08-14 DOI: 10.3800/pbr.15.238

S. Sawamoto, Y. Hanamura, R. Mantiri, S. Ohtsuka

引用次数: 0

Trophic segregation in a burrow: the stable carbon and nitrogen isotope ratios of the burrowing shrimp Upogebia major and its commensal bivalve Cryptomya busoensis 洞穴中的营养分离：洞穴虾Upogebia major及其共生双壳类Cryptomya busoensis的稳定碳氮同位素比率

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-08-14 DOI: 10.3800/pbr.15.220

K. Seike, R. Goto

{"title":"Trophic segregation in a burrow: the stable carbon and nitrogen isotope ratios of the burrowing shrimp Upogebia major and its commensal bivalve Cryptomya busoensis","authors":"K. Seike, R. Goto","doi":"10.3800/pbr.15.220","DOIUrl":"https://doi.org/10.3800/pbr.15.220","url":null,"abstract":": Burrows produced by marine invertebrates often harbor other small commensal invertebrates. The mud shrimp Upogebia is known to coexist with the myid bivalve Cryptomya in a burrow produced by the shrimp. Both species are ﬁlter-feeders, and thus interspeciﬁc competition or trophic niche segregation may occur in the burrow. Samples for carbon and nitrogen stable isotope analysis were collected from a tidal ﬂat near the tidal inlet of Akkeshi Lake, Hokkaido, northern Japan in April 2013. In addition, stratiﬁed benthos sampling was conducted on the tidal ﬂat in August 2018, to clarify the interspeciﬁc relationship between U. major and C. busoensis in the burrow. The stratiﬁed benthos sampling showed the vertical distribution of these species, and indicated that both species ﬁlter water from the same part of the burrow for feeding. The stable carbon and nitrogen isotope analysis showed that important food sources for both U. major and C. busoensis are marine phytoplankton and microphytobenthos. In addition, C. busoensis is likely to consume terrestrial organic matter whereas U. major is unable to utilize it. The partial trophic segregation between the species increases the potential benthic ﬁltering because it allows the Upogebia burrow complex to con sume a wide variety of organic matter, and it might reduce interspeciﬁc competition between the ﬁlter-feeding host and its commensal species. These results demonstrate how ecologically similar macrobenthos can coexist in a burrow.","PeriodicalId":56054,"journal":{"name":"Plankton & Benthos Research","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45657429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Males display “inverse rapping” as a mating behavior to receptive females in the hermit crab Pagurus nigrofascia 在寄居蟹Pagurus nigrofascia中，雄性表现出“反向拍打”，这是对接受雌性的交配行为

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-08-14 DOI: 10.3800/pbr.15.279

Yuina Kido, S. Wada

{"title":"Males display “inverse rapping” as a mating behavior to receptive females in the hermit crab Pagurus nigrofascia","authors":"Yuina Kido, S. Wada","doi":"10.3800/pbr.15.279","DOIUrl":"https://doi.org/10.3800/pbr.15.279","url":null,"abstract":": This paper describes “ inverse rapping ” as a characteristic mating behavior in Pagurus nigrofascia . The behavior involves one hermit crab pulling another crab ʼ s shell towards itself causing the shells to hit against each other. This is the ﬁrst evidence that males perform inverse rapping as a mating behavior in a Pagurus species. Two experi-ments were conducted to describe the inverse rapping in detail and to discuss its function. In Experiment A, we clariﬁed when (mating season or non-mating season) and to whom (males or females) males displayed this behavior. A focal male that had not been guarding in the ﬁeld was placed together with another crab and their interaction was observed, especially inverse rapping. Males showed inverse rapping mainly with a female that was close to copulation in the mating season, especially when the male guarded the female. In Experiment B, we examined the female ʼ s response to male inverse rapping and tested the eﬀect of the presence of a neighboring conspeciﬁc on the occurrence of the behavior. Most females reduced struggling and/or withdrew into their shells in response to male inverse rapping. The presence of neighboring crabs did not aﬀect inverse rapping. Our ﬁndings suggest that inverse rapping is a mating behavior in P. nigrofascia , and that inverse rapping may beneﬁt males in the initiation and/or continuation of precopulatory guarding because it can help to restrain struggling females. This behavior has not been observed in other sympatric Pagurus species and appears to be a characteristic mating behavior of P. nigrofascia .","PeriodicalId":56054,"journal":{"name":"Plankton & Benthos Research","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2020-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48665659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Bioluminescent properties of Mesochaetopterus japonicus (Polychaeta: Chaetopteridae) with comparison to Chaetopterus 日本中毛翼(多毛目:毛翼科)与毛翼的生物发光特性比较

IF 0.6 4区生物学

Plankton & Benthos Research Pub Date : 2020-08-14 DOI: 10.3800/pbr.15.228

Ikuhiko Kin, Y. Oba

引用次数: 0