nitrogen as one of the important nutrients of microalgae has significant affect on the growth and nutrition value of the algae if the changes. in present study the growth and fatty acids content of the different concentration of nitrate (0, 0.62, 1.25, 2.5 and 5 mm from no3) was studied during a 12 day cultivation period of haematococcus sp. and desmodesmus cunaetus. at 22 °c in laboratory cond...

The green alga Scenedesmus is known for its phenotypic plasticity in response to grazing risk. However, the benefits of colony formation induced by infochemicals from zooplankton should come with costs. That is, a tradeoff in benefit-to-cost ratios is likely under complex environmental conditions. In this study, we hypothesized that the coexistence of Scenedesmus and its competitors decreases t...

The capacity of microalgae to accumulate heavy metals has been widely investigated for its potential applications in wastewater (bio)treatment. In this study, the ability of Desmodesmus pleiomorphus (strain L), a wild strain isolated from a polluted environment, to remove Cd from aqueous solutions was studied, by exposing its biomass to several Cd concentrations. Removal from solution reached a...

This paper provides a detailed redescription of the adult as well as the first morphological description of all juvenile instars (inclusive egg, prelarva and earlier larval stages) of Scutovertex pannonicus. The adults are characterized by their relatively large size (692-892 μm), their well developed sharply bordered foveae which are regularly distributed on the whole notogaster, except in the...

Heterosaccus lunatus parasitizes the portunid crab, Charybdis callianassa in Moreton Bay, Australia. With the host crabs maintained at 22.5 degrees C this sacculinid rhizocephalan released larval broods every 6-7 days. During July-August 1996 and particularly August 1999 such broods showed the change-over from male only larvae in the early broods to females only in the later broods. As the host...

A pair of fly impressions is described as a new species of a new genus, Orientisargus illecebrosusgen. et sp. n., referred to a new family Orientisargidaefam. n. within Archisargoidea of Brachycera, Diptera. The systematic position of Orientisargidae is discussed. Daohugosargusgen. n. is proposed for Sharasargus eximius KY Zhang et al., 2008. Uranorhagionidae is a junior synonym for Archisargid...

Desmodesmus is a green microalgal genus that frequently found in aquatic environments. Its high biomass productivity and potential as source of lipids have attracted considerable attention. Although ubiquitous, it difficult to identify; even within small area, the diversity species fatty acids they produce are unknown. In this study, we performed scanning electron microscopy (SEM) analyzed gene...

POŠTULKOVÁ EVA, KOPP RADOVAN. 2016. Guanicid and PHMG Toxicity Tests on Aquatic Organisms. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(1): 129–134. The emergence and development of new algicidal products is caused by the ever increasing popularity of garden ponds as well as the use of these products in the fi sheries sector, especially for disposal of cyanobacteri...