Results 71 to 80 of about 1,997 (179)

The choice of a suitable sampler for benthic macroinvertebrates in deep rivers [PDF]

open access: yes, 1980
Both chemical and biological methods are used to assess the water quality of rivers. Many standard physical and chemical methods are now established, but biological procedures of comparable accuracy and versatility are still lacking.
Drake, C.M., Elliott, J.M., Tullet, P.A.
core  

Zur Kenntnis Der Mikrofauna Von Britisch Indien. II Hydracarina

open access: yesRecords of the Zoological Survey of India, 1928
No Abstract.
openaire   +1 more source

Biological research of Grabia River - fifty years of activity [PDF]

open access: yes, 2005
Grabia, a small still close to natural conditions lowland river, has been an object of special interest for Łódź hydrobiologists for more than 50 years.
Siciński, Jacek, Tończyk, Grzegorz
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A guide to the freshwater fauna of Ceylon. Supplement 3 [PDF]

open access: yes, 1969
This supplement to the “Guide to the freshwater fauna of Ceylon” by A. S. Mendis and C. H. Fernando. Bull Fish. Res. Stn. Ceylon 12, 160 pp. (1962) includes a number of additional records to the fauna and nomenclatural changes designed to bring the ...
Fernando, C.H.
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Hydrological, Environmental and Taxonomical Heterogeneity during the Transition from Drying to Flowing Conditions in a Mediterranean Intermittent River. [PDF]

open access: yesBiology (Basel), 2021
Banegas-Medina A   +9 more
europepmc   +1 more source

Comparative studies on the structure of an upland African stream ecosystem [PDF]

open access: yes, 2004
Upland stream systems have been extensively investigated in Europe, North America and Australasia and many of the central ideas concerning their function are based on these systems.
Abdallah, Ahmel   +29 more
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Cambios en las condiciones físicas, químicas y faunísticas de un sistema fluvial (río Oma, Bizkaia), y desaparición de una población de cangrejo autóctono (Austropotamobius pallipes) : ¿causa y/o efecto? [PDF]

open access: yes, 2004
El Oma (cuenca del río Oka, provincia de Bizkaia) es un pequeño río relativamente poco alterado que recorre terrenos de uso forestal, agrícola y ganadero. En él habitaba una población bien establecida de cangrejo autóctono Austropotamobius pallipes, pero
Antón, A.   +2 more
core  

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