Journal of Fisheries Engineering

Online ISSN : 2434-0693
Print ISSN : 0388-4872

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A Study on Slide Resistance of Artificial Reefs

Chokei ITOSU, Makoto NAKAMURA, Masabumi SETO, Kenji HAYAKAWA

1990 Volume 26 Issue 2 Pages 13-18
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_13

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Slide resistance of the artificial reef was studied according to a channel-type model, see figure1, and the characteristics of passive earth pressure and frictional force were examined in a small tractive tunk filled with sand and water. The results obtained from this experiment are as follow ; (1) Moving directional component of passive earth pressure that acts on a flat plate accepting slide resistance obliquely is equal to passive earth pressure that acts on moving directional projective plane of the plate. (2) Frictional angle ( δ) between artifial reef and sand, which is used to calculate the passive earth pressure coefficient, is always negative, i. e. 'δ‹0', see equation (5), In this case, frictional angle can be 'δ= tan^-1 μ', where μ is frictional coefficient between artificial reef and sand.

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Recent Development and Prospects of Abalone seedling Production

Nagahisa UKI

1990 Volume 26 Issue 2 Pages 19-23
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_19

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Food Environment for Abalone on Fishing Ground

Shogo ARAI

1990 Volume 26 Issue 2 Pages 25-32
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_25

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Mortal Factors in the Mass Release of Abalone

Hiroshi AKIYAMA

1990 Volume 26 Issue 2 Pages 33-39
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_33

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Fundamental consideration on estimating restocking effectiveness of sea-farming technology

Yoshiharu MATSUMIYA

1990 Volume 26 Issue 2 Pages 41-46
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_41

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The effects and problems of releasing juvenile abalones

On the basis of the investigations in SHINOJIMA area, AICHI prefecture

Toyoshige YANAGISAWA, Kenichi YOSHIMURA

1990 Volume 26 Issue 2 Pages 47-52
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_47

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Conspectus on Propagaton of Japanese Abalone

Makoto NONAKA

1990 Volume 26 Issue 2 Pages 53-55
Published: 1990
Released on J-STAGE: July 02, 2018

DOIhttps://doi.org/10.18903/fishengold.26.2_53

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