Results 171 to 180 of about 4,250 (214)
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Haemoglobin in a Monogenean, Oculotrema hippopotami
Nature, 1970Oculotrema hippopotami is a Polystomatid Monogenean that lives around the eye of the Hippopotamus. The anterior two-thirds of the body of mature worms is a dark red colour, while the posterior part, including the haptor, is almost colourless. Tests have shown that red colour is due to haemoglobin.
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1986
Publisher Summary This chapter illustrates the role of the eggs in the biology of monogenean parasites. The life cycles of monogeneans are relatively simple compared with those of other parasitic platyhelminths (cestodes and digeneans). Most monogeneans inhabit the skin and gills of fishes, and these sites are accessible to free-swimming larvae ...
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Publisher Summary This chapter illustrates the role of the eggs in the biology of monogenean parasites. The life cycles of monogeneans are relatively simple compared with those of other parasitic platyhelminths (cestodes and digeneans). Most monogeneans inhabit the skin and gills of fishes, and these sites are accessible to free-swimming larvae ...
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Larvae and Larval Development of Monogeneans
1963Publisher Summary This chapter focusses on a group of parasitic platyhelminths generally referred to as monogenetic trematodes. A few monogeneans are viviparous and the newly-born young resemble the parents, but most are oviparous, and the newly hatched young is a larva and called an oncomiracidium.
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Parasitology Research, 2008
Gyrodactylid monogeneans are considered to be the most invasive fish parasites. They are omnipresent on teleost fishes and host change might play a crucial role in their biology. In the present study, related fish species were kept in single- or mixed-species groups to test the ability of Gyrodactylus species to change their host fish under ...
R D, Blazek, A, Bagge, E T, Valtonen
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Gyrodactylid monogeneans are considered to be the most invasive fish parasites. They are omnipresent on teleost fishes and host change might play a crucial role in their biology. In the present study, related fish species were kept in single- or mixed-species groups to test the ability of Gyrodactylus species to change their host fish under ...
R D, Blazek, A, Bagge, E T, Valtonen
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Transmission of the monogenean Gyrodactylus salaris
Parasitology International, 1998The present study is focusing on the transmission of the monogenean ectoparasite Gyrodactylus salaris Malmberg, 1957, a major pathogen on natural populations of Norwegian Atlantic salmon, Salmo salar L. In laboratory experiments the transmission rate of G.
A Soleng, P Jansen, T Bakke
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Non-monophyly of the monogeneans?
International Journal for Parasitology, 1998There is currently no congruence between phylogenies based on morphology, in which the Monogenea are considered a monophylum, and molecular phylogenies based on 18S or 28S rDNA, in which the Monogenea are never considered monophyletic. However, all analyses based on morphology and sperm characters or molecular data found constantly the two subgroups ...
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Monogenean neuromusculature: some structural and functional correlates
International Journal for Parasitology, 1998Monogenean neuromuscular systems are structurally and functionally well-differentiated, as evidenced by research on the fish-gill parasite, Diclidophora merlangi. The nervous system in the worm exhibits a raft of putative intercellular signalling molecules, localised in neuronal vesicles.
Halton, David W. +3 more
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The influence of climate on the distribution of monogeneans of anurans in Nigeria
Journal of Helminthology, 2004AbstractInvestigations undertaken on the monogeneans of amphibians in Nigeria have shown that host ecology has an influence on the distribution of these monogeneans. Amphibians from humid environments of the rainforest, a freshwater swamp and mangrove harboured no monogeneans, whereas those occurring in drier conditions in the savannah-mosaic and ...
S O, Aisien +3 more
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The nutrition of the gill parasitic monogenean Pseudodactylogyrus anguillae
Parasitology Research, 1987A histological and histochemical study of ingested food material, energy stores and enzymes in the monogenean Pseudodactylogyrus anguillae, parasitizing the gills of the European eel (Anguilla anguilla) is presented. It was found that mucus, epithelial cells and blood from the gills were ingested.
Buchmann, K., Køie, M., Prentø, P.
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Insemination of the monogenean Neobenedenia girellae (Capsalidae, Benedeniinae)
Parasitology International, 2014In vitro spermatophore formation and insemination of Neobenedenia girellae (Monogenea: Capsalidae, Benedeniinae) were recorded on video and described for the first time. Upon contact of two individuals, the anterior adhesive discs of the donor firmly attached to the dorsal tegument of the recipient and the donor's fore body strongly contracted such ...
K, Ogawa, S, Shirakashi, H, Ishitani
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