Results 101 to 110 of about 8,762 (196)

Flora do Rio de Janeiro: Ceratophyllaceae

open access: yesRodriguésia
Resumo O presente estudo tem como objetivo contribuir para o conhecimento das espécies de Ceratophyllaceae ocorrentes no estado do Rio de Janeiro. O trabalho tem por base a análise morfológica de materiais depositados em herbários e coletas de campo ...
Aline de Jesus Correia   +1 more
doaj   +1 more source

Studies on energy transformation in the freshwater snail Pila globosa 1. Influence of feeding rate [PDF]

open access: yes, 1974
The effects of eleven chosen feeding levels ranging from 0 to 198 mg damp dry (plant) Ceratophyllumlg live snail /day on the absorption, conversion and metabolism of the snail Pi/a globosa (of 1•9 g body weight) have been studied.
Haniffa, M A   +3 more
core  

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  

Comparative study of hatching rates of African catfish (Clarias gariepinus Burchell 1822) eggs on different substrates [PDF]

open access: yes
The hatching rates of African catfish (Clarias gariepinus) eggs on four natural substrates: the roots of Nile cabbage (Pistia stratiotes), water hyacinth (Eichhornia crassipes), pond weed (Ceratophyllum dermasum) and green grass leaves (Commelina sp ...
Macharia, S.K., Ngugi, C.C., Rasowo, J.
core  

Gravierende Veränderungen in der submersen Makrophytenvegetation der Alten Fahrt bei Senden in Westfalen [PDF]

open access: yes, 2012
Die Makrophytenvegetation eines stillgelegten Kanalabschnittes ("Alte Fahrt") bei Senden in Westfalen hat sich seit Beginn der 90er Jahre drastisch verändert.
Wittig, Rüdiger
core  

Seasonal Biomass and Carbohydrate Allocation Patterns in Southern Minnesota Curlyleaf Pondweed Populations [PDF]

open access: yes, 2003
Four southern Minnesota populations of curlyleaf pondweed ( Potamogeton crispus L.) were sampled monthly from January 2001 to November 2002 to determine seasonal phenological, biomass, and carbohydrate allocation patterns.
Madsen, John D., Woolf, Thomas E.
core  

Biology and potential impacts of rudd (Scardinius erythrophthalmus L.) in New Zealand [PDF]

open access: yes, 2003
Rudd (Scardinius erythrophthalmus) is a cyprinid fish native to Europe that was illegally introduced into New Zealand in 1967. Between the 1960s and 1980s rudd were illegally spread to a number of lakes, ponds, and rivers in New Zealand, principally ...
Hicks, Brendan J.
core  

Роголистники (Ceratophyllum, Ceratophyllaceae) Саратовской области

open access: yesИзвестия Саратовского университета. Новая серия. Серия Химия. Биология. Экология, 2012
Data on distribution Ceratophyllum in the Saratov region and a key for definition ...
openaire   +1 more source

What cooling pond sediments can reveal about 14C in nuclear power plant liquid effluents: Case study Lake Drūkšiai, Ignalina nuclear power plant cooling pond. [PDF]

open access: yesPLoS One, 2023
Barisevičiūtė R   +9 more
europepmc   +1 more source

Syntaxonomic conspectus of the vegetation of Catalonia and Andorra. I: Hygrophilous herbaceous communities.

open access: yes, 2000
The first part of a general survey of the vegetation of Catalonia and Andorra, this paper reports all the phytocoenological associations and subassociations recorded in this area.
Carreras i Raurell, Jordi   +3 more
core  

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