baby在大自然中應是吃以下圖底的浮游生物,圖中的輪蟲是~130micro dia,那是我用~60micro的網去迎紅樹林泥灘捕捉的,我不是讀生物的,所以請專家們指點一下,圖中下部浮游生物,究竟是那種生物, 詳細資料可看圖下remark,那段是我在其他討論區發過的版本,對不起我懶去譯中文了.
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i try to collect wild copepods by a small plankton net(only wave it in water by two hands), want to know the degree of usefulness of the small net and the abundance of copepod in particular location in winter.
date & time: 26/12/05, 14:00, sunny day
location: a mangrove beach
water temp: 20 degree C(winter)
water depth: 2 feet
tides : rising
i use florida Farm 50 micron plankton net (5"dia,15"long)with a 2m long rod,
wave it by hands slowly on the surfuce of water for 15 mins ,mix the collected bottle';s water up to 1L seawater.
i roughly count the amount and type of copepod in this collection:
1) 2-3 /ml (nauplii of copepods,i only guess it is nauplii)=90%
2) 0.2-0.3/ml ( adult of copepods or one is bigger than nauplii )=10%
3) total collect about 3,000 pcs copepods
below pics are in same magnification,the rotifers are s-rotifer(110-140 micron).
the two nauplii below the rotifers.
just for fun in holiday! any bro. has experience in collecting wild copepods for sharing .
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這是某一種水蚤吧,水蚤在各海域都有,種類多數量多,各種體型都有。
 
To :
突然想問一下,水蚤與輪蟲都是在同比例下拍照的嗎?
如果是的話,這種水蚤體型真小。
 
係同一個放大倍數(100倍). 其實你指的水蚤,是指那樣生物?
上圖下部那兩隻, 我估係其中一種撓足類浮游的幼生, 但不知是那種, 因它只有~90micron,
但我見書中的圖多數沒有長尾巴的.
 
一般的撓足類Copepod在台灣都通稱為水蚤,我是覺得上圖的Copepod應該已經算是成蟲了,因為Copepod的nauplii應該是沒尾巴長得像蜘蛛一樣,例如下圖,如果這種Copepod數量夠多的話,他的nauplii也許可以拿來當火焰的第一期餌料。
短角異劍水蚤的幼生:
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短角異劍水蚤的5天大的幼蟲:
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成蟲抱卵的樣子:
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但我圖中下部那隻, 除多了條尾外, 無論外貌,結構(非常簡單,不樣成蟲)和大小(只有~90micron,成蟲大多過500,甚至過幾千都有)都蠻像"蜘蛛"般的橈足類幼生,
 
大大太厲害了~~ 小小丑真的好可愛哦~~
哈~~ 我的目標也是希望能繁殖呢... 家裡的公子也是一大一小 ^^
不過首先還是要先等他們長大啦~~ 哈~~
謝謝分享哦~~
 

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