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The authors investigated of the mycoflora developing on the eggs of fishes representing 33 cyprinid taxa.
The authors investigated of the mycoflora developing on the eggs of nine taxons of North Pacific salmon (genus Oncorhynchus).
The authors investigated of the mycoflora developing on the eggs of six species of the genus Alosa.
Forty-one species of fungi were revealed on the eggs of four cobitid species. The following unknown fish fungi were found: Achlya oblongata De Bary, Aphanomyces daphniae, Prowse, Aphanomyces parasiticus Coker, Protoachlya paradoxa (Coker) Coker, and Sparrowia parasitica Willoughby.
The mycoflora developing on the hair of wild and domestic animal species in the water of 6 limnologically different water bodies was investigated under laboratory conditions. 123 zoosporic fungus species were found to grow on the hair investigated, including 27 chytridiomycetes, 1 hypochytriomycetes, 93 oomycetes, and I zygomycetes fungus. The most common fungus species included Rhizophydium keratinophilum, Rhizophydium nodulosum, Blastocladiopsis parva, Catenophlyctis variabilis, Aphanomyces irregularis, Aphanomyces kerathinophilus, Saprolegnia ferax, and Zoophagus insidians. Rhizophydium keratinophilum and Aphanomyces irregularis were found on the hair of all the animals examined. The most fungi were noted to grow in water from lake Komosa (59), the fewest in water from spring Cypisek and spring Jaroszowka (each 49). Out of these 123 species, 33 are known as parasites or necrotrophs of fish. Twelve fungus species were recorded for the first time in Poland.
The authors investigated the mycoflora developing on the dead glass eel (montée) and elvers (Anguilla anguilla L.)
The authors investigated zoosporic fungi developing on the pollen grains of 36 taxons of gymnosperm plants in three bodies of water of various trophic state. A total of 83 zoosporic fungus species were noted, with predominance by the Peronosporales (39) and Chytridiales species (29). Twelve fungus species were recorded for the first time in Polish waters.
The authors analyzed the occurrence of zoosporic fungi and straminipilous organisms in relation to environmental factors in the main bed of the Narew River and its three tributaries (Awissa, Turośnianka, and Kurówka) in two vegetative seasons: spring and autumn. The bait method used to isolate microorganisms helped to distinguish various physiological groups, such as phytosaprotrophs, zoosaprotrophs, and parasites of plants, animals, and fungi. Forty taxons that were determined were more frequently found in the main current of the Narew River than in its tributaries. The major factors limiting the species composition of zoosporic fungi and straminipilous organisms in the sampling locations included hydrochemical parameters, such as CO₂, nitrites, nitrates, ammonium nitrogen, and phosphates that showed negative correlation, pH, and O₂ being positively correlated with the number of the microorganisms studied.
In our study we analyzed the species composition of fungi and heterotrophic straminipiles in four ponds of a fish farm in Popielewo and in four ponds in Poryta Jabłoń situated in the vicinity of Knyszyn, Poland. Samples of water were collected during the spring and autumn of 2009. Fourty-two species (11 fungi and 31 heterotrophic straminipiles) were recovered. We found some potential pathogens of economically valuable fish and fish spawn, such as Achlya americana, Ac. polyandra, Saprolegnia ferax, and S. parasitica. In addition, we found some common human pathogens such as Aspergillus niger, and Candida tropicalis. Some saprotrophs such as Rhizophlyctis rosea, Nowakowskiella elegans, Olpidiopsis saprolegniae, Pythium debaiyanum, Py. gracile, Py. hemmianum, and Py. inflation appeared to be relatively common. Most species of fungi and straminipiles were recovered from ponds in Poryta Jabłoń (34), while the smallest number was found in Popielewo ponds (25). The physico-chemical analysis of water showed that ponds in Poryta Jabłoń were the least polluted with organic matter, whereas biogenic compounds were most abundant in Popielewo.
Our study involved the quantitative analysis of species composition of fungi and straminipilous organisms in four ponds situated in Białystok, Poland. The observations performed in April and November 2006 with respect to hydrochemical conditions revealed the occurrence of 48 species, including 9 fungi and 39 straminipilous organisms. Among species of fungi and straminipilous organisms, we found such pathogens of crustaceans and fish as Achlya dubia, Ac. oblongata, Ac. polyandra, Aphanomyces bosminae, Ap. laevis, Dictychus monosporus, Pythium jirovecii, Py. undulatum, Saprolegnia ferax, S. parasitica, S. pseudocrustosa and Thraustotheca clavata. The human pathogens Aspergillus niger, Candida tropicalis and Catenophlyctis variabilis as well as plant pathogens Pythium butleri and Py. debaryanum were also found. Such phytosaprophytes as Achlya klebsiana, Karlingia rosea, Nowakowskiella elegans, N. macrospora, Pythium akanense, Py. aquatile, Py. elongatum, Py. inflatum and Py. intermedium were relatively common. Most species of fungi and straminipilous organisms were found to grow in Dojlidy Pond (27), the fewest in Akcent Pond (14). The hydrochemical analysis of water showed that Dojlidy was the least burdened with organic matter, whereas Akcent was the most abundant in biogenic compounds.
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