Results 101 to 110 of about 2,443 (215)

Fish and macroinvertebrates in lowland drainage canals with and without grass carp [PDF]

open access: yes, 2006
Diploid grass carp (Ctenopharyngodon idella L.) were introduced to a lowland Waikato drainage canal at an initial density of 40-80 kg ha -1(83-167 fish ha -1) to control aquatic macrophytes and improve water flow.
Bannon, Henry James   +2 more
core   +1 more source

A study of the macro-invertebrates of Lakes Naivasha, Oloidien and Sonachi, Kenya [PDF]

open access: yes, 1989
Des prélèvements de macro-invertébrés ont été faits dans le lac Naivasha en décembre-janvier 1982-83 et en juillet-août 1984, et dans les deux lacs avoisinants, Oloidien et Sonachi, seulement en 1984.
Beeby, A., Clark, F., Kirby, P.
core  

Microplastics Affect Sediment Phosphorus Transformation: Based on the Interplay of Bioturbation and Microbial Regulation

open access: yesEcosystem Health and Sustainability
Anthropogenic activities frequently cause the accumulation of phosphorus (P) and microplastics (MPs) in river sediments. MP contamination can alter the transformations of sediment phosphorus, thereby elevating the risks of river eutrophication and ...
Mengli Chen   +9 more
doaj   +1 more source

Índices parasitários da arraia cururu Potamotrygon cf. histrix da Bacia do médio Rio Negro, Amazonas, Brasil. [PDF]

open access: yes, 2017
A família Potamotrygonidae é constituída por arraias de vida exclusiva em água doce, encontradas na maioria dos sistemas fluviais da América do Sul.
DIAS, M. T.   +5 more
core  

A find of Argulus coregoni (Crustacea: Branchiura) on brook trout in the Western Dvina basin

open access: yesТрансформация экосистем
The crustaceans Argulus coregoni Thorell, 1864 were found on the body surface of brook trout Salmo trutta m. fario L., 1758 in the Velesa River (tributary of the Western Dvina River, Tver Oblast, Russia). This is the first finding of A.
I. S. Turbanov, A. E. Zhokhov
doaj   +1 more source

Zoocoenological state of microhabitats and its seasonal dynamics in an aquatic macroinvertebrate assembly (Hydrobiological case studies on lake Balaton, No. 1.) [PDF]

open access: yes, 2005
In the years 2002, 2003 and 2004 we collected samples of macroinvertebrates on a total of 36 occasions in Badacsony bay, in areas of open water (in the years 2003 and 2004 reed-grassy) as well as populated by reed (Phragmites australis) and cattail ...
Gaál, Márta   +2 more
core  

Branquiuros (Branchiura)

open access: yes, 1953
2 pages Cuerpo deprimido, dividido en dos regiones: la anterior está cubierta dorsalmente por un amplio escudo (fig. 170) y la posterior termina en forma de aleta bilobada. [...] Argulus foliaceus (= Monoculus foliaceus), Argulus matritensis (?= Argulus pellucidus) [...] Peer ...
openaire   +1 more source

Cladoceren-Funde in der oberen und mittleren Hase (1966-1969) : mit 2 Tabellen [PDF]

open access: yes, 1976
Die Cladoceren-Funde im Rahmen der Untersuchung der oberen und mittleren Hase und ihr Aussage-Wert über den Biotop werden erörtert und in 2 Tabellen ...
Hollwedel, Werner
core  

Présentation de "Branchiura Sowerbyi", "Craspedacusta Sowerbyi" et "Urnatella gracilis"

open access: yes, 1941
L'institut Ed. van Beneden a entrepris l'année passée, l'étude hydrobiologique de la Meuse. Cette enquête permit la découverte dans notre fleuve, de trois formes animales curieuses. Ce sont le ver à panache : Branchiura Sowerbyi (Beddart), la méduse d'eau douce : Craspedacusta Sowerbyi (Lank.) et le bryozoaire endoprocte d'eau douce : Urnatella ...
openaire   +2 more sources

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