kiwiyang 發問時間: 社會與文化語言 · 1 0 年前


Most researches have been conducted on

temperate zone tadpoles; there has been little

research on subtropical and tropical species. We

investigated algae consumed by Rana sauteri

(Ranidae) and Bufo bankorensis (Bufonidae)

tadpoles in a subtropical stream in Taiwan.

Specifically, we hypothesized that tadpoles of

both species are non-selective algal feeders and

predicted that the compositions of algae found in

the alimentary canals of these 2 species would be

similar to those found on tiles placed in streams

where the tadpoles were collected.


Field methods

We conducted our studies from Oct. 2001 to

Dec. 2002 at the Lienhuachih Biological Station

(23°55'N, 120°52'E) of the Taiwan Forestry

Research Institute Experimental Forest, Nantou

County, central Taiwan. The station encompasses

a 461-ha watershed. The area where we worked

was covered by undisturbed lowland primary forest,

characterized by low topography with elevations

ranging 576-975 m. The mean annual air

temperature was 21.1°C, and ranged from 9.9°C

in Jan. to 30.0°C in July. The area receives

approximately 2200 mm of rain annually. Although

it rains in all months, the wet season is from May

through Oct.

We collected 3 R. sauteri and B. bankorensis

tadpoles each, if possible, from each of the 6

sites distributed in the upstream (sites 5 and 6),

midstream (site 3), and downstream (sites 1,

2, and 4) portions of 2 main tributaries (Fig. 1).

These sites were never dry, but sites 5 and 6 had

little water during the dry season. The stream bank

and bottom consisted of sand, gravel, boulders,

and bedrock. Tadpole species identification was

mainly based on the external morphology, body

coloration, and mouth part morphology (Chou

and Lin 1997). Dominant vegetation along the

stream was Ageratum houstonianum, Alocasia

macrorrhiza, Bambusa stenostachya, Bidens

pilosa, Crassocephalum rabens, Dendrocalamus

latiflorus, Hedychium coronarium, Impatiens

balsam, Mallotus japonicus, Miscanthus floridulus,

Solanum nigrum, and Sphaeropteris lepifera.

3 個解答

  • EMED
    Lv 7
    1 0 年前




    Field methods 田地方法

    我們的研究從2001年10月至2002年12月,在中台灣南投縣台灣農委會蓮華池生物站(2355'N, 12052'E).

    此站包圍著一個 461-ha分水嶺.我們在此的研究包含未被碰過的森林低地,它的特點是低海拔,在576-975 公尺間.


    雖然整月在下雨,潮溼季節從5月至10月.我們收集各3隻梭德氏赤蛙和盤古蟾蜍,如有可能,從分布在上游(sites 5 and 6),中游(site 3)及下游(sites 1, 2, and 4)的支流部份的6個場所.


    小河的優勢植群為紫花藿香薊, 姑婆芋, 刺竹, 大花咸豐草, 昭和草, 麻竹, 野薑花鳳仙花, 野桐, 芒草, 龍葵和筆筒樹

  • 6 年前



  • 匿名使用者
    6 年前