Článek se zabývá taxonomií, reprodukční biologií, fylogenetikou, fylogeografií a introdukční historií ryb rodu karas (Carassius). Článek poskytuje souhrn poznatků, které jsou značně komplikované a spojené s jedinečným způsobem rozmnožování, definicí druhu a nepřesným chápáním biologie a systematiky těchto ryb v minulosti. Celá problematika je ještě daleko od svého kompletního vyřešení, ale současný pohled nám může pomoci v lepší péči o vodní prostředí., This article deals with the taxonomy, reproductive biology, phylogenetics, phylogeography and introduction history of the fishes of the genus Carassius. It summarizes findings associated with their unique mode of reproduction, challenging species delimitation and insufficient understanding of the biology and systematics of these fishes in the past. Deeper insight into the biology of Prussian Carp (Carassius gibelio) will require more research, but the available results can improve our understanding and management of the aquatic environment., Lukáš Kalous., and Obsahuje seznam literatury
K lalokoploutvým rybám lze vysledovat původ nejstarších čtvernožců (tetrapodů). Přestože dnes přežívají jen dva druhy rodu latimerie (Latimeria), v minulosti tyto ryby představovaly poměrně úspěšnou skupinu vodních obratlovců. Článek popisuje hlavní znaky jednotlivých skupin a jejich minulost., Fossil lobe-finned fishes can be traced as direct ancestors of the first terrestrial tetrapods. Although two species of one genus (coelacanths Latimeria chalumnae and L. menadoensis) have survived to these days, the lobe-finned fishes formed a successful group of aquatic vertebrates in the past. The main features and history of their subgroups are described., and Tomáš Přikryl.
This paper summarises the results of parasitological examinations of the European eel Anguilla anguilla (Linnaeus) in the Czech Republic, carried out at the Institute of Parasitology, Czech Academy of Sciences (previously the Czechoslovak Academy of Sciences) within the period of 50 years (1958-2008). Even though this survey is limited to the Czech Republic, it provides extensive data probably incomparable with any other study anywhere regarding the number of eels examined and parasites found. A total of 723 eels was examined from 42 localities that belong to all of the three main river drainage systems in the country, i.e. the Elbe, Danube and Oder river basins. Of the 31 species of adult and larval macroparasites including Monogenea (4 species), Trematoda (3), Cestoda (3), Nematoda (11), Acanthocephala (5), Hirudinea (1), Bivalvia (1), Copepoda (1), Branchiura (1) and Acariformes (1), most of them (30) were recorded from the Elbe River basin. These parasites can be divided into three main groups regarding their host specificity: parasites specific for eels (26%), non-specific adult parasites occurring also in other fishes (61%) and non-specific larvae (13%). The highest number (19) of parasite species was recorded in the Mácha Lake fishpond system in northern Bohemia. The parasite communities in eels from the individual localities exhibited large differences in their species composition and diversity depending on local ecological conditions. The parasite fauna of A. anguilla in the Czech Republic is compared with that in other European countries. The nematode Cucullanus egyptae Abdel-Ghaffar, Bashtar, Abdel-Gaber, Morsy, Mehlhorn, Al Quraishy et Mohammed, 2014 is designated as a species inquirenda., František Moravec, Tomáš Scholz., and Obsahuje bibliografii
This representative of the family Bedotiidae, which has been kept by aquarists for several decades, was mistakenly referred as Bedotia geayi – this type has actually never been bred in aquaria. Breeding of B. madagascariensis in a larger aquarium with hard and alkaline water is easy, and rearing is also possible with the help of artificial feed. and Jozef Májsky.