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轉貼舊版-Debunking the Dairy Myth

suger 發表於: 星期四 十二月 20, 2007 10:25 pm
   文章主題: Debunking the Dairy Myth



Debunking the Dairy Myth
http://www.epicureanhermit.com/index.php?option=com_content&task=view&id=155&Itemid=25
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Written by Julia Crab
Saturday, 31 December 2005
Debunking the Dairy Myth

“Don’t feed your crabs dairy! It will kill them!”

I’ve heard this since the first day I found my first crab site on the internet. Everyone says it; it’s “common knowledge.” It is also incorrect.

Like many tidbits of crabbing wisdom, “don’t feed your crabs dairy” is based on conjecture, misunderstanding of nutrition and the properties of food, and is widespread because it’s repeated constantly. However, just because something is repeated over and over again does not make it true; it just makes it familiar.

The reasoning behind the idea that crabs cannot eat dairy is based on flawed information. It is believed, and argued, that crabs don’t have the necessary enzymes to digest lactose, the sugar in milk. Since they are not mammals, they are not equipped to digest lactose. This seems reasonable and logical on the surface, at first glance, and by people with no deeper knowledge of nutrition and the properties of food.

I have been thinking about this problem for over a year, doing research and conducting feeding trials along with several members of my food group, Epicurean Hermit. One of the things that didn’t make sense to me was, if arthropods cannot digest lactose, why is it that there is a creature known as a cheese mite, that lives on cheese?

“Cheese mites can also live in corn, flour, etc., but they are best known for their occurrence in cheese, in which they gnaw small holes. These cosmopolitan mites are common in stored food, damp flour, old honeycombs, and insect collections. A ripe, mite-infested cheese will be more or less covered with a grey powder, which consists of the mites themselves and their moulted skin and faeces. Cheese mites can live at low temperatures but not in the refrigerator. For many cheeses the presence of mites is highly undesirable, but there are some cheeses in which a culture of cheese mites is introduced for example to Altenburger cheese to impart a characteristic "piquant" taste. When the cheese is covered with a greyish powder, consisting of enormous numbers of living and dead mites, cast skins, and faeces, it is considered by some people to be "ripe" and particularly delectable. Cheese can be protected by a thin layer of paraffin wax.

The cheese mite, known to cause dermatitis, is larger than both the grain mite and the mould mite. It has stout, well-tanned, faintly-wrinkled legs (obviously been on holiday) and tanned mouthparts. Males and females are similar except that females are larger. The life cycle requires 15 to 18 days at the ideal temperature of 73̊F and an Relative Humidity of 87%. Unlike the grain mite the hypopus stage does not occur in the cheese mite.”

http://www.the-piedpiper.co.uk/th7g.htm

Furthermore, casein, the protein found in milk, is used extensively in crustacean aquaculture diets; that is, the commercially-prepared feed produced for crustaceans being farmed for food. In aquaculture, it is important to give maxiumum nutrition to cause animals to grow quickly and be healthy enough and attractive enough to make it to our dinner tables. According to Gary Burtle, of the University of Georgia College of Agricultural and Environmental Sciences, in one particular species of shrimp Penaeus vannamei, casein is 99.1% digestible. Many people that are allergic to dairy products are not allergic to the lactose, but the casein found in the foods in question. Casein is used widely in many different diets for many different types of crustacean and is highly digestible across the board.

After doing extensive research along these lines, and questioning scientists when I could, I came to the conclusion that it would be safe to conduct feeding trials of dairy items in my own tank. The hardest part for me, was overcoming the doubts raised in my mind by constantly hearing that dairy was lethal. I had to make a leap of faith. I have great faith in the crabs’ ability to detect whether a natural item is edible by them or not. Their olfactory equipment is as sharp and efficient as that of carrion flies, and they know what compounds to avoid in a natural item. Unnatural and synthetic compounds can confuse their sensory equipment, but if it is a natural, unprocessed food, I firmly believe that they have the ability to detect whether it is poisonous or harmful to them, and whether or not they can derive any nutritional benefit from it.

About February 2005, I started with low-lactose cheese, organic sharp cheddar. It was a massive hit. I noted several crabs, especially cavipes and rugosus, enjoying the cheese I had put in their food dish.

After that trial, I attempted live-culture yogurt, as the bacteria included in the live-culture yogurts digest the little lactose remaining in the food for the eater, rather than depending on the consumer’s own enzymes to break it down for them. The yogurt, also, was extremely popular.

For several months, I communicated with other crabbers who were open to the idea of doing feeding trials and shared my results, while still feeding the occasional treat of cheese or yogurt. Other people reproduced my results, with the same end: i.e., no deaths whether immediate or delayed, no bad molts, and no unusual behavior.

A member of my food group (kuplakrabs) let it be known a few months after I’d announced my results that she had been giving her crabs whole milk for several months. She had had absolutely no unexplained deaths, with the exception of one brevimanus that never ate and died of PPS. I decided to attempt a whole milk trial myself.

The milk was massively popular, with a line of crabs waiting for their turn to have a drink outside the dish. I still have had no deaths in the crabs that I observed drinking the whole milk.

It has been nearly a year since I began feeding trials of dairy products, and I am confident enough in my results to state that dairy is NOT lethal to crabs. They enjoy it immensely.

I am going to continue to feed mine dairy on a weekly to bi-monthly schedule to check long-term effects, but it is not immediately lethal, nor even deadly in the short term.

For the time being, dairy is an acceptable food item, if used as an occasional treat. It should not be relied upon as a regular staple until more research and trials have been conducted, but giving your crabs cheese or live culture yogurt, even a small dish of milk, once every 30 to 60 days is harmless. Be sure, however, to use only organically-produced dairy products, as feed-lot dairy milk is contaminated with antibiotics and growth hormones and these items should be avoided in coenobita diet at any cost.

The dairy myth is dead. Long live cheese.
Last Updated ( Sunday, 15 January 2006 )



網主Tony

本人並非飼養陸寄居蟹之專業人仕. 其解答只屬本人之個人意見. 如有錯誤, 敬請見諒和指點.

如有問題請電郵給我tony_coenobita@hotmail.com

BigMac  發表於: 星期五 十二月 21, 2007 11:37 am
   文章主題:



先前有傳說指不能給GG蟹喝(吃)牛奶(奶製品),因為GG蟹不是哺乳動物,會有乳糖不耐的問題,不過這位網友不相信,進行了嚐試和實驗之後,是破解了這項長久以來的謠言。也就是說,可以喂食GG蟹牛奶、起士和優格等奶製品...

之前我在網路上沒有看過不能喝牛奶的報導,
我會在麥片中混加一些全脂奶粉給GG蟹吃,它們雖然不是頂愛吃的,但也看不出有何問題...

網主Tony

本人並非飼養陸寄居蟹之專業人仕. 其解答只屬本人之個人意見. 如有錯誤, 敬請見諒和指點.

如有問題請電郵給我tony_coenobita@hotmail.com

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tonycoenobita 發表於: 星期五 十二月 21, 2007 1:25 pm
   文章主題:



BigMack大,

你是直接給奶粉狀的全脂奶粉給牠們吃嗎?

有些蟹友錯提出過餵牠們吃高鈣牛奶, 以補充鈣質......


網主Tony

本人並非飼養陸寄居蟹之專業人仕. 其解答只屬本人之個人意見. 如有錯誤, 敬請見諒和指點.

如有問題請電郵給我tony_coenobita@hotmail.com

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BigMac 發表於: 星期六 十二月 22, 2007 10:05 am
   文章主題:



是在熟麥片(早餐用的那種instant麥片)加上一些全脂奶粉(instant full cream power milk),攪拌之後(乾的)給GG蟹食用。我目前沒有高鈣奶粉...

其實我給GG蟹吃的東西非常多樣化,經常餵食的有狗食、魚飼料(都是粒狀,不泡水),蛋殼(磨成的)粉、小櫻花蝦、吐司、飯粒、麥片、奶粉,有時給它們鹵排骨肉,它們都愛的很。我的GG蟹好像不喜歡吃玉米粒!

另外還有提供維他命C的新鮮蔬菜,如甘藷葉、大白菜葉和甘藍菜葉等都很愛吃。

其實除了狗食和魚食之外,全都是我自己吃的,留下一小份,不過我會避免辛辣和高油脂以及味精加太多的,例如肉鬆(它們很愛吃),但我只是偶而給它們吃...

我不會給GG們單一的食物,我通常都會使用三到四種的食物,讓它們自己去挑著吃,食物也會經常輪換。

賣GG蟹的曾經告訴我,GG們喜歡吃有香味(如爆玉米花)和腥味的,我覺得很有道理,但我不會經常這麼做。

網主Tony

本人並非飼養陸寄居蟹之專業人仕. 其解答只屬本人之個人意見. 如有錯誤, 敬請見諒和指點.

如有問題請電郵給我tony_coenobita@hotmail.com

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前幾天我也在想是否能給寄居蟹吃起士呢!
因為起士含有鈣質,想說可以當作補充品給寄居蟹們補充一下鈣質,但又不知道是否可以餵食。
若是以這篇文章看起來,餵食起士好像也沒什麼問題。
生命不分貴賤,動物不分品種,大家都是獨一無二的生命體

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