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研究生:包喬威
研究生(外文):Chiau-Wei Pao
論文名稱:龍鬚菜養殖及洋菜生產之研究ぇ絲藻Chaetomorphasp.之生物防治え龍鬚菜生長率與洋菜質量之關係
論文名稱(外文):Studies on Gracilaria Culture and Agar Production (1)Biological Control Against Chaetomorpha sp. (2)Relations Between the Growth Rate and Agar Content of Gracilaria
指導教授:陳伯中陳伯中引用關係
指導教授(外文):Pei-Chung Cheng
學位類別:碩士
校院名稱:國立中興大學
系所名稱:植物學系
學門:生命科學學門
學類:生物學類
論文種類:學術論文
論文出版年:1994
畢業學年度:82
語文別:中文
論文頁數:70
中文關鍵詞:龍鬚菜洋菜水深養殖品質數量
外文關鍵詞:Gracilariaagarwater depthaquaculturequalityquantity
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本文以不同水深對菊花心種龍鬚菜 Gracilaria tenuistipitata var.
liui 之生長及其洋菜品質之影響, 進行相關研究;此外對越冬期間為害
龍鬚菜生長最烈的絲藻 Chaetomorpha sp. 進行魚苗生物防治觀察。在絲
藻防治上, 臭都魚係一值得考慮之混養魚種,除可抑制 Chaetomorpha
sp.及其他雜藻之繁生,並可耐低溫至10 ℃左右。龍鬚菜養殖以水深30 cm
生長者最快,膠強度以 60 c m生長者為佳,收率則以 90 cm生長者最高
,綜合評估以水深 60 cm 生長者膠品質較穩定。整體言,其品質可達微
生物級洋菜品質規範,膠強度平均可達450 g/cm以上 ,硫酸根平均約
0.7 %,遠低於其規範4 %以下,灰分約3 %以下, 透明度可以較佳抽取
設備改進之。 在相關分析上, 呈顯著正相關為:水深30 cm生長之龍鬚菜
,其凝溫和膠強度、3,6-無水半乳醣等, 硫酸根和生長率, 60 cm 生長者
之融點和洋菜收率, 以及3,6-無水半乳醣和鹽度等。呈顯著負相關為:60
cm生長者之硫酸根和鹽度, 灰分與洋菜收率, 及 90 cm生長者之灰分與透
明度。
Gracilaria tenuistipitata var.liui were cultivated in pond for
examining the effect of water depth on their growth rate and
agar quality. Another topic is to study the effect of
biological control against the filamentous alga, Chaetomorpha
sp., existing in the pond during winter-time。 IT was found
that the epiphyte grazer, rabbit fish(Siganus fuscescens )
was a good biotic controller to deprive Chaetomorpha sp.,
and this fish could surive in 10°C water temperature during
the winter. The best growth rate for G.tenuistipitata var.
liui is of which growing under 30 cm water depth. The
best agar gel strength can be obtained from the 60 cm one
and best agar yield from the 90 cm one. As a whole,
there is the best performance in which growing under 60 cm.
The perpared agar can be purified to bacteriological grade
quality, average gel strength being up to 450 g/cm,average
sulphate contant about 0.7%,ash below 3%. And clarity of
agar can improve further by using better equipment. Some
measured parameters are calculated their correlations
using significance test. Positive correlations are found
between: (growing under 30 cm water depth) gelling
temperature and gel strength ; gelling temperature and 3,6-
A.G content ; sulphate content and alga growth rate ;(growing
under 60 cm ) agar melting temperature and agar yield; and
3,6-A.G content and water salinity. Negative correlation are
found between; (growing under 60 cm) sulphate content and
water salinity; ash content and agar yield; (growing under
90 cm) ash content and clarity.
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