Intersexuality in Asellus aquaticus L. parasitized by a Larval Acanthocephalan
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منابع مشابه
The Osmotic and Ionic Regulation of Asellus Aquaticus (l.) By
The isopod, Asellus, has been reported from a wide range of conditions in fresh and brackish water. One species, A. aquaticus, has a natural salinity range from fresh water (0-15 m-equiv./l. Na; Moon, 1957) to the Baltic (103 mM./l. NaCl; Valikangas, 1933). Thienemann (1913) has also found it occurring in Westphalian brine pools at a concentration of 25-3 % salt (equivalent to 434 mM./l. NaCl)....
متن کاملCarotenoids and carotenoproteins in Asellus aquaticus L. (Crustacea: Isopoda).
Column (CC), thin-layer (TLC), high-performance liquid (HPLC) and ion-exchange chromatography (IEC), were used to investigate corotenoid and carotenoprotein complexes in Asellus aquaticus specimens from the Narew river. The following carotenoids were found: alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein, zeaxanthin, diadinoxanthin, mutatoxanthin, crustaxanthin, echinenone, hydroxyech...
متن کاملNuclear DNA content of Asellus aquaticus and Proasellus coxalis
— 1982 a: Isopoda (Crustacea: Peracarida) ohne Oostegite: Uber einen Microcerberus aus Florida. Mitt. Zool. Mus. Univ. Kiel 1, 19-23. — 1982 b: On a new Microcerberus from the Red Sea and the relationship of the Microcerberidea to the Anthuridea (Crustacea, Isopoda). Zool. Scripta 11, 281-286. — 1982 c: Protocerberus gen. n. und Afrocerberus gen. n., neue limnische Microcerberidea aus Afrika. B...
متن کاملThe influence of fresh water pollutants and interaction with Asellus aquaticus (L.) on the feeding activity of Gammarus pulex (L.).
The feeding response of juvenile amphipod Gammarus pulex (L.) was investigated following exposure to freshwater pollutants. The method employed is nondestructive, provides a rapid indication of the status of groups of individuals, and is based on a time-response analysis of the consumption of the eggs of Artemia salina and the determination of median feeding times or FT50s. The feeding activity...
متن کاملDifferentiation of dispersive traits under a fluctuating range distribution in Asellus aquaticus
Rapporttyp Report category Examensarbete C-uppsats Knowledge about dispersion is of utmost importance for understanding populations' reaction to changes in the environment. Expansion of a population range brings with it both spatial sorting and over time, spatial selection. This means that dispersion rates increases over time at the expanding edge. Most studies have so far been performed on con...
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ژورنال
عنوان ژورنال: Nature
سال: 1953
ISSN: 0028-0836,1476-4687
DOI: 10.1038/172313a0