Microplastic contamination of table salts from Taiwanese markets
為了解決Marine Biology HKU的問題，作者李彗米 這樣論述：
Objective: To identify the numbers, shapes, sizes and polymer types of microplastics in Taiwanese sea salts which are being consumed by humans, often on a daily basis.Method: Purchase of 11 salt products in Taiwanese supermarkets, dissolution and filtration of sea salts, visual examination of poten
tial microplastic particles with visual microscope, identification of microplastic particles with FTIR spectroscopy. 400 g of each salt product were checked for microplastic particles. After that, identified microplastics from salt and described numbers, shapes, sizes and polymer type.Results: Among
the 4400 g of dissolved salt, 43 microplastic particles were found, which amounts to an estimate of 9.77 microplastic particles per kg of salt. 43 microplastic particles has categorized 3 fibers and 40 fragments as shape. The mean, standard deviation and range of the 43 particles was 342.3 ± 251.1
(minimum 89.7, maximum 1474.9) μm. The identified polymer types were: polyethylene (34.9%), polyetherimide (2.3%), polyester (4.7%), polyethylene terephthalate (2.3%), polyoxymethylene (2.3%), polypropylene (39.5%), and polystyrene.Conclusion: Every salt product was contaminated with microplastic, w
hich is also true for the four previously published studies. Therefore, we need to consider the potential health impacts of microplastic in food products consumed by almost every human on a daily basis.
不同飼料來源對大和米蝦卵巢發育成熟之影響
為了解決Marine Biology HKU的問題，作者張鈞博 這樣論述：
本實驗之目的為探討不同飼料來源對大和米蝦（Caridina mutidentata）卵巢發育與成熟之影響，孵化技術與餌料投餵序列的建立。探討Estradiol與Testosterone飼料餵食大和米蝦稚蝦對性別調控與成長之影響。觀察大和米蝦第一期卵巢發育66週，第2 ~ 12週第一期卵巢發育顯著增加，12 ~ 18週呈現下降表現，第18 ~ 30週呈現另一高峰，第30週後呈現平緩表現。比較不同飼料來源對第一期卵巢發育，結果顯示，餵食赤蟲組，在第6週呈現最顯著高峰，文蛤次之，投餵飼料組別（控制組飼料與添加賀爾蒙飼料組）表現最低。觀察第二期卵巢發育66週，結果顯示，餵食控制組飼料組別，第2 ~
10週顯著增加，第10 ~ 18週呈現下降趨勢，第18 ~ 24週呈現緩慢增加趨勢，第24週後呈現平緩。餵食赤蟲與文蛤組別，結果顯示，赤蟲組自第2週開始有顯著增加趨勢，至第14週為最高峰，第14週後呈現平緩表現；文蛤組自第2週開始有顯著增加趨勢，至第18週為最高峰，第18週後呈現平緩表現。餵食賀爾蒙飼料組別，表現趨勢與控制組飼料組相似。觀察大和米蝦第3期卵巢發育66週，結果顯示，各組別自第3週開始呈顯增加趨勢，尤以投餵控制組飼料組與賀爾蒙飼料組，呈現最高增加量，持續表現至第18週，而後呈現下降趨勢至第27週，第27週後再次呈現緩慢增加的趨勢，至第45週，第45週後呈現下降趨勢；餵食赤蟲與文蛤組
，第12~18週呈現增加趨勢，第18週後緩慢下降至第30週，第30週至第36週呈現小幅增加趨勢，第36週後再次下降。受精卵在26 ± 1 ℃下，胚胎發育在第7天進入預孵化期 （Pre-hatch Embryo）。蝦苗在28 ± 1 ℃、鹽度為18 ‰，投餵人工飼料與牟氏角毛藻（Cheatoceros muelleri）經歷22天的變化發育至後期幼體，幼苗變態為底棲性稚蝦，外觀與成蝦無異。孵化後6週之稚蝦，投餵Estradiol與Testosterone飼料，進行16週觀察，結果顯示Estradiol與Testosterone對稚蝦性別調控，無明顯影響效果。
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