Venus (Japanese Journal of Malacology)

Online ISSN : 2432-9967
Print ISSN : 0042-3580
ISSN-L : 0042-3580

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Volume 29, Issue 2

Displaying 1-7 of 7 articles from this issue

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Description of a New Cowry from Taiwan

Phillip W. CLOVER

Article type: Article
1970 Volume 29 Issue 2 Pages 35-_36-1_
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_35

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Taxonomical Notes on the Turrids of the Siboga-Collection Originally Described by M. M. SCHEPMAN, 1913 (Part II)

Tsugio SHUTO

Article type: Article
1970 Volume 29 Issue 2 Pages 37-_53-2_
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_37

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[title in Japanese]

[in Japanese]

Article type: Article
1970 Volume 29 Issue 2 Pages 54-58,64
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_54

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Two New Cerithiopsid Species from Japan

Tadashige HABE

Article type: Article
1970 Volume 29 Issue 2 Pages 55-57
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_55

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Description of a New Species of Subgenus Coelorus PILSBRY, 1906 from Oita Pref., Japan

Masao AZUMA

Article type: Article
1970 Volume 29 Issue 2 Pages 59-63
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_59

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Notes on Damage to Cultured Oysters in Hiroshima Caused by Predation of a Species of Turbellarian, Stylochus ijimai YERI et KABURAKI

Kohman ARAKAWA

Article type: Article
1970 Volume 29 Issue 2 Pages 65-71
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_65

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Several species of turbellarians have been reported associated with commercially important marine bivalves. Among these, several belonging to the genera Stylochus and Pseudostylochus are known to feed on oysters. During the autumn of 1968, Stylochus ijimai, a predaceous turbellarian, outbreaks in offshore oyster culture grounds in the vicinity of Hiroshima Bay (Text-fig. 1) and caused widespread damage to cultured oyster crops in this area (Text-figs. 2-4). The oyster mortality from predation of this turbellarian is estimated between 40 and 85 per cent (Table 1). It is likely that the outbreak of this turbellarian is correlated closely with anomalies of meteorological and hydrographical phenomena of this district in that year of 1968 : scanty rainfall, high salinity of sea water etc. (Text-figs. 7-9).

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[title in Japanese]

[in Japanese]

Article type: Article
1970 Volume 29 Issue 2 Pages 72-73
Published: June 30, 1970
Released on J-STAGE: January 31, 2018

DOIhttps://doi.org/10.18941/venusjjm.29.2_72

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