Effect of nutrient salts eluted from hedoro blocks on growth and survival rate of gametophyte and juvenile Eisenia bicyclis.
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- CHEN YONG
- Department of Ocean Sciences, Tokyo University of Fisheries Department of Marine Fisheries, Dalian Fisheries Univeristy
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- ARAKAWA HISAYUKI
- Department of Ocean Sciences, Tokyo University of Fisheries
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- OHTA JUNKO
- Department of Ocean Sciences, Tokyo University of Fisheries
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- MORINAGA TSUTOMU
- Department of Ocean Sciences, Tokyo University of Fisheries
Bibliographic Information
- Other Title
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- Effect of n00084ent salts eluted from hedoro blocks on growth and survival rate of gametophyte and juvenile Eisenia bicyclis
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Abstract
The effects of nutrient salts eluted from artificial algal reef blocks made with sea-bottom sediment (hedoro) and cement to the growth and survival rate of the gametophytes and juveniles of Eisenia bicyclis were investigated. When each sample block was submerged in filtered seawater for 28 days, the nutrient salt content from the hedoro increased with time and, in particular, the amounts of NO3−-N and NO2−-N reached a constant level on day 10. We observed that the lower the cement ratio, the higher the concentrations of eluted NH4+-N and PO43−-P. The growth of gametophytes as well as juveniles was highest in the elution of the block with the lowest cement ratio of 30%. In contrast, the survival rate of gametophytes and juveniles decreased linearly with time and the survival rate was higher for the hedoro blocks than for the block made of mortar.
Journal
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- Fisheries science
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Fisheries science 66 (6), 1001-1005, 2000
The Japanese Society of Fisheries Science
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Details 詳細情報について
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- CRID
- 1390001204430105600
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- NII Article ID
- 10009623189
- 130003903523
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- NII Book ID
- AA10993718
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- ISSN
- 14442906
- 09199268
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- NDL BIB ID
- 5645714
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed