Zoosporic fungi growing on the eggs of Coregonus lavaretus maraena (Bloch, 1779) from Lake Miedwie in Pomerania

Abstract

The authors investigated of the mycoflora developing on the eggs of Miedwie whitefish (Coregonus lavaretus mara ena). 32 aquatic zoosporic fungus species developed on the eggs, including 24 of the order Saprolegniales and 8 of the Peronosporales.

Aphanomyces frigidophilus, fungus-like organisms isolated from water of springs in Białystok, Poland

“…The first in Poland and in Europe Ap. frigidophilus have been described only on the basic morphological studies by Czeczuga et al, (2004a; in fish eggs of European Whitefish Coregonus lavaretus holsatus obtained from Lake Wdzydze in Kaszuby (Poland). The next in Europe Ap.…”

“…Some of them are animal or human parasites. In favorable conditions, water mold acting as saprobionts can assume pathogenic properties, being a potential source of infection (Dick, 2001;Czeczuga et al, 2004a;Kiziewicz and Kurzatkowska, 2004;Kirk et al, 2008). In spring of rivers, a lot of representatives of water moulds of the class Oomycetes are met.…”

Observations of mycotal species growth on the rainbow trout eggs (Oncorhynchus mykiss)

“…A. polyandra was observed quite frequently on the eggs of four lampreys that were examined (Czeczuga, 1997) and on Atlantic salmon (Czeczuga et al, 2011a), and L. lacteus infects many fish species in different water bodies. Aphanomyces frigidophilus was described as occurring on the eggs of the Japanese char Salvelinus leucomaenis and, for the first time in Europe, on the eggs of Coregonus lavaretus (Czeczuga et al, 2004). Aphanomyces frigidophilus also grows on some species from the Salmo genus (Czeczuga et al, 2011a), including sturgeonid fishes (Czeczuga et al, 2012b), Chinook salmon (Czeczuga et al, 2012a) and African catfish (Czeczuga et al, 2013), and on the alevins of the Nile tilapia (Czeczuga et al, 2014b), and on the eggs of Stenodus species (Czeczuga et al, 2014a).…”

First records of Pythium aquatile and P. macrosporum isolated from soils in Japan

“…Means of the data were compared by least Pythium aquatile Höhnk and P. macrosporum Vaartaja & Van der Plaats-Niterink, previously undescribed in Japan, were isolated from soil of a cultivated fi eld of soybean in Gunma Prefecture and a forest of Japanese red pine in Nagano Prefecture, respectively. Pythium aquatile has been reported in Germany (Höhnk 1953), New Zealand (Robertson 1973a), Pakistan (Abdul-Haq and Shahzad 1998), Norway (Herrero et al 2003), and Poland (Czeczuga et al 2004). This species has moderate virulence to seedlings of some vegetables (Robertson 1973b).…”

“…As in a previous report (Robertson 1973b) and the present pathogenicity data (Table 1) for P. aquatile, the species is thought to be a weak plant pathogen. Pythium aquatile usually lives in natural soils (Höhnk 1953;Abdul-haq and Shahzad 1998;Czeczuga et al 2004) and may cause slight to moderate diseases on crops when it is introduced into plant cultivation environments.…”