Results 131 to 140 of about 321 (171)
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Dimorphism and the Life Cycle of Austropotamobius Pallipes (Lereboullet, 1858)
Crustaceana, 1987Bei Austropotamobius pallipes sind die Scheren und die beiden ersten Pleopodenpaare auffallig geschlechtsdimorph ausgebildet. Eine Untersuchung der Entwicklungsstadien nach dem Schlupfen aus dem Ei bis zum Adultus enthullt weitere geschlechtsdimorphe Zuge.
W.J. Thomas, R.W. Ingle
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2010
The White-clawed Crayfish (Austropotamobius pallipes) has been assessed as Endangered under criterion A2ce. In the last ten years this species is suspected to have undergone a decline of somewhere between 50 - 80% based on presence/absence data available for England, France and Italy. The situation in these countries is thought to be similar to that of
L. FÜREDER +5 more
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The White-clawed Crayfish (Austropotamobius pallipes) has been assessed as Endangered under criterion A2ce. In the last ten years this species is suspected to have undergone a decline of somewhere between 50 - 80% based on presence/absence data available for England, France and Italy. The situation in these countries is thought to be similar to that of
L. FÜREDER +5 more
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A study of reproductive females of the freshwater crayfish Austropotamobius pallipes
Hydrobiologia, 1985Details of the female annual reproductive cycle in the population from Northumberland are given. Mating occurs in October and is followed by egg laying in early November. Eggs are carried by females until the following July–August when hatching occurs.
J. M. Brewis, K. Bowler
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Biochemical and Biophysical Research Communications, 1991
The early enzyme-mediated reaction sequence in the biosynthesis of melanin from L-tyrosine involves an initial hydroxylation (monophenol oxidase activity, MPO) of the aromatic amino acid precursor to form L-dopa (3,4-dihydroxyphenylalanine), and the ensuing oxidation (diphenol oxidase activity, DPO) of the resultant diphenol to form dopaquinone.
A J, Nappi, J, Seymour
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The early enzyme-mediated reaction sequence in the biosynthesis of melanin from L-tyrosine involves an initial hydroxylation (monophenol oxidase activity, MPO) of the aromatic amino acid precursor to form L-dopa (3,4-dihydroxyphenylalanine), and the ensuing oxidation (diphenol oxidase activity, DPO) of the resultant diphenol to form dopaquinone.
A J, Nappi, J, Seymour
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The Hatchling Setae of Austropotamobius Pallipes (Lereboullet) (Decapoda, Astacidae)
Crustaceana, 1973Der genaue Befruchtungsort und die genaue Befruchtungszeit des Austropotamobius pallipes sind nicht bekannt; befruchtete Eier schlupfen in der zweiten Juniwoche aus. Der frischgeschlupfte Krebs hat in diesem ersten Stadium fast noch keine Haare; aber die Position der zukunftigen Haare ist durch Auswuchse auf der Schale angedeutet. Die Antennen haben im
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Respiration in relation to ion uptake in the crayfish Austropotamobius pallipes (Lereboullet)
Journal of Experimental Biology, 1976ABSTRACT O2 uptake was determined for periods of 23–46 h in salt-depleted crayfish held in deionized water (DW) or Na-free media at 10°C. These media were replaced by artificial lakewater media (ALW) containing 0·20–6 mM Na and O2 uptake was again determined for periods of 24–66 h.
D W, Sutcliffe, T R, Carrick
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Austropotamobius pallipes reduction vs. Procambarus clarkii spreading: Management implications
Journal for Nature Conservation, 2014One of the main threats to native European crayfish is the spread of alien crayfish species that are immune carriers of the detrimental crayfish plague Aphanomyces astaci. In this study we analyzed both at a regional and at a local scale factors determining native and alien crayfish distribution in an area where the species Procambarus clarkii is ...
R. Manenti +4 more
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Food selection in freshwater omnivores: a case study of crayfish Austropotamobius pallipes
Archiv für Hydrobiologie, 2004The omnivorous habit and food selection in freshwater macroinvertebrates was investigated in the white-clawed crayfish, Austropotamobius pallipes, a threatened species. First, during an annual cycle we analysed gut contents for vascular plant detritus, moss, amorphous plant material, and animal remains, and evaluated their organic content.
GHERARDI, FRANCESCA +2 more
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Artificial incubation of the eggs of the crayfish Austropotamobius pallipes (Lereboullet)
Aquaculture, 1981Abstract In Great Britain, incubation time for eggs of the native crayfish, Austropotamobius pallipes, is approximately 9 months, with hatching occurring in May and June in Midlands waters. Artificial incubation at higher than ambient temperature would possibly reduce this time and make juveniles available for stocking in early spring.
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Molecular Reproduction and Development, 2002
AbstractIn this article, we present evidence for progesterone and estradiol receptors (PR and ER, respectively) in the female of the crayfishAustropotamobius pallipes. To our knowledge, this is the first report of sex steroid receptors in crustaceans. By using immunohistochemistry and Western blotting approaches and employing three different antibodies
PAOLUCCI M, DI CRISTO C, DI COSMO, ANNA
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AbstractIn this article, we present evidence for progesterone and estradiol receptors (PR and ER, respectively) in the female of the crayfishAustropotamobius pallipes. To our knowledge, this is the first report of sex steroid receptors in crustaceans. By using immunohistochemistry and Western blotting approaches and employing three different antibodies
PAOLUCCI M, DI CRISTO C, DI COSMO, ANNA
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