Results 121 to 130 of about 321 (171)
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Morphometrical characterization of theAustropotamobius pallipesspecies complex
Journal of Natural History, 2008Studio del comportamento di specie invasive.
Massimiliano Scalici +2 more
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Morphometrical characterization of theAustropotamobius pallipesspecies complex
Journal of Natural History, 2008Genetic studies have shown that the threatened crayfish Austropotamobius pallipes species complex is composed of two lineages (A. italicus and A. pallipes), both occurring in Italy. However, the issue surrounding their taxonomic status has not yet been solved even though the confused taxonomy may hamper attempts to conserve indigenous crayfish. The aim
S. BERTOCCHI +4 more
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The distribution of the crayfish, Austropotamobius pallipes, in British waters
Freshwater Biology, 1981SUMMARY. The distribution of Austropotamobius pallipes, the only freshwater crayfish indigenous to the British Isles, is examined using over 300 records collected since 1970. The majority of records are for England where crayfish are found in areas associated with base‐rich easily weathered substrata.
D. JAY, D. M. HOLDICH
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The setae of Austropotamobius pallipes (Crustacea: Astacidae)
Journal of Zoology, 1970The author presents here the results of an introductory study into the setal armature of the British species of crayfish, Austropotamobius pallipes (Lereboullet, 1858). Using an ordinary optical microscope, it is demonstrated that a considerable variety of setae exist on the body and appendages of A. pallipes.
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Forag ing by a threatened species - the whiteclawed crayfish, Austropotamobius pallipes
Archiv für Hydrobiologie, 2001In analysing the eco-ethological traits of animal populations from the viewpoint of conservation biology, an understanding of the foraging activity of endangered species provides useful clues on habitat requirements and resource utilisation. The present study examined the foraging excursions of 60 specimens of the threatened crayfish, Austropotamobius ...
GHERARDI, FRANCESCA +2 more
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Conservation Genetics, 2000
Here we report a high level of mtDNA variationfrom RFLP analysis within A. p. pallipes from 21 French and 4British populations. Seventeen haplotypes were recorded among 269individuals. Nucleotide sequence divergence (p) among mtDNAhaplotypes ranged from 0.0019 to 0.0425.
Grandjean, F., Souty-Grosset, C.
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Here we report a high level of mtDNA variationfrom RFLP analysis within A. p. pallipes from 21 French and 4British populations. Seventeen haplotypes were recorded among 269individuals. Nucleotide sequence divergence (p) among mtDNAhaplotypes ranged from 0.0019 to 0.0425.
Grandjean, F., Souty-Grosset, C.
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Xenobiotica, 1985
The acute toxicities of dimethylnitrosamine and diethylnitrosamine have been evaluated in adult male crayfish Austropotamobius pallipes; LD50 values are 2250 mg/kg and 230 mg/kg, respectively. Toxicokinetic studies of 14C-dimethylnitrosamine and 14C-diethylnitrosamine in crayfish, administered by i.v.
R, Alibaud +4 more
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The acute toxicities of dimethylnitrosamine and diethylnitrosamine have been evaluated in adult male crayfish Austropotamobius pallipes; LD50 values are 2250 mg/kg and 230 mg/kg, respectively. Toxicokinetic studies of 14C-dimethylnitrosamine and 14C-diethylnitrosamine in crayfish, administered by i.v.
R, Alibaud +4 more
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Metal-binding proteins in the hepatopancreas of the crayfish (Austropotamobius pallipes)
Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1983Abstract 1. The hepatopancreas of the crayfish (Austropotamobius pallipes) has been studied in relation to the cellular distribution of Cu, Zn and Cd ions administered in viro or in vitro. 2. Supernatant fractions have been investigated by gel filtration chromatography and three main components have been identified with apparent molecular weights of
R.Lyon.Marina Taylor, K. Simkiss
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Metal ion metabolism in the moulting crayfish (Austropotamobius pallipes)
Comparative Biochemistry and Physiology Part A: Physiology, 1982Abstract 1. 1. The hepatopancreas, antennal gland, gills, gonads. muscle, stomach, carapace, gastroliths and blood of 52 crayfish (Austropotamobius pallipes) have been analysed for copper, zinc, iron, manganese and calcium throughout the moult cycle. 2. 2. There are significant changes in most of these metals at the time of ecdysis. 3. 3.
Elizabeth Adams +2 more
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The biting edges of the chelae and pereiopods of Austropotamobius pallipes
Experientia, 1977The ‘biting edges’ of the chelae and pereiopods of A. pallipes are made up of individual setae of a specialized structure. Those making up the edges of the chelate appendages are modified for prehension, those of the non-chelate appendages, for preening.
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