小軻 發問時間: 社會與文化語言 · 1 0 年前

動物原文期刊翻譯<急>part10

Bufo bankorensis tadpoles contained twice

the amount of algae than did R. sauteri per

unit body mass, suggesting that the alimentary

canals of B. bankorensis are longer, larger, or

both. Amphibian larvae devote most of their

energy to growth and development so they can

metamorphose as quickly as possible (Wilbur

1980). Studies of herbivorous tadpoles have

shown that the time food takes to pass through

the alimentary canal (i.e., the clearance time) is

relatively short, at only 1-6 h (Savage 1962, Costa

and Balasubramanian 1965, Altig and McDearman

1975). Diaz-Paniagua (1989) suggested that

long alimentary canals not only contain more

food, but also retain food longer which facilitates

digestion and absorption. At our study site, both B.

bankorensis and R. sauteri bred around mid-Sept.

and tadpoles were abundant beginning in Oct.

However, we began to encounter B. bankorensis

froglets along the stream banks around Nov., prior

to the metamorphosis of R. sauteri, suggesting

that B. bankorensis tadpoles develop faster.

Determining whether the difference in development

rates is related to the length and/or size of the

alimentary canals requires further study.

Algal compositions on the tiles were similar

to algal compositions in the alimentary canals of

both R. sauteri and B. bankorensis, suggesting

that tadpoles were not selecting specific algal

species. Seale and Beckvar (1980) compared the

ability of H. crucifer, B. americanus, B. woodhousei

fowleri, R. catesbeiana, and R. sylvatica tadpoles

to ingest suspended blue-green algae. They found

that these 5 anurans were not selectively feeding,

and suggested that it was not possible to do so on

small suspended algae. Wagner (1986) described

how P. regilla tadpoles behaviorally select pollen

by ingesting pollen grains at the water surface.

2 個解答

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  • EMED
    Lv 7
    1 0 年前
    最佳解答

    在每個身體質量單位,盤古蟾蜍蝌蚪比梭德氏赤蛙多含2倍的海藻量,使人想到盤古蟾蜍的消化道更長更大. 二棲類幼蟲用他們的能量來成長及發展,所以他們能很快地變形(Wilbur 1980). 食草的蝌蚪研究指出食物經消化道的時間相對地比較短, (如, 清除時間) ,只在1-6小時(Savage 1962, Costa and Balasubramanian 1965, Altig and McDearman 1975). Diaz-Paniagua (1989) 建議長消化道不只含更多食物,也保留食物長一點時間來使消化跟吸收更客易. 在我們的研究, 盤古蟾蜍蝌蚪比梭德氏赤蛙繁殖在9月中及大量的蝌蚪在10月初.

    然而,在11月我們開始沿著小河支流去遇到盤古蟾蜍青娃腿, 在比梭德氏赤蛙變化前,暗示盤古蟾蜍蝌蚪發展較快. 決定是否進化比例不同與消化道長度及尺寸有關則需要更多的研究.

    瓦礫上海藻成份和盤古蟾蜍和比梭德氏赤蛙消化道的成分相似., 暗示蝌蚪不會選擇海藻的品種. Seale and Beckvar (1980)比較H. crucifer, B. americanus, B. woodhousei fowleri, R. catesbeiana, 和 R. sylvatica 蝌蚪的能力(生產力)來攝取懸浮的藍綠藻. 他們發現這5個無尾目科目不是選擇性的吃,且暗示在小懸浮海藻上這是不可能發生的. Wagner (1986) 描述太平洋樹蟾蝌蚪如何在水面上攝取花粉結晶的選擇花粉的行為.

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  • 5 年前

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