Results 201 to 210 of about 118,212 (238)
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Bioluminescence in the Crustacea
Journal of Crustacean Biology, 1985Bacterial luminescence 557 Taxonomic distribution of luminescence .... 557 O stracoda 557 Copepoda ... 558 A m phipoda ...... 560 M ysidacea .. .... .. ..... 561 Euphausiacea ..... 561 Decapoda ..... . . . . . ..... ......
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1922
Die mehrfach unterbrochene Kette tertiärer und jüngerer vulkanischer Gesteine, welche Java der Länge nach durchzieht, wird nordwärts und südwärts sowie in den Lücken von tertiären und quartären Ablagerungen eingerahmt ¹). Kreideformation und hoch krystalline Schiefer treten ganz vereinzelt und auf wenige Aufschlüsse beschränkt zutage.
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Die mehrfach unterbrochene Kette tertiärer und jüngerer vulkanischer Gesteine, welche Java der Länge nach durchzieht, wird nordwärts und südwärts sowie in den Lücken von tertiären und quartären Ablagerungen eingerahmt ¹). Kreideformation und hoch krystalline Schiefer treten ganz vereinzelt und auf wenige Aufschlüsse beschränkt zutage.
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Reproduction in Notostraca (Crustacea)
Nature, 1954IN some species of Notostraca, populations occur in which no males are found and these have generally been considered to reproduce by parthenogenesis; the European Triops (=Apus) cancriformis (Bosc.) exhibits a geographical variation in the occurrence of males, which are less common, or absent, in the north of its range, so that the species has been ...
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1996
Spectrophotometric Method. The spectrophotometric method [247], described in Sects. 4.2.1 and 7.1.1 for the determination of arsenic in sediments and in fish, is also applicable to the determination of arsenic in crustacea. Recoveries of 5–10 μg arsenic added to a crayfish with a basal arsenic content of 16.8 ≦ 0.5 μg arsenic were between 98 and 100 %.
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Spectrophotometric Method. The spectrophotometric method [247], described in Sects. 4.2.1 and 7.1.1 for the determination of arsenic in sediments and in fish, is also applicable to the determination of arsenic in crustacea. Recoveries of 5–10 μg arsenic added to a crayfish with a basal arsenic content of 16.8 ≦ 0.5 μg arsenic were between 98 and 100 %.
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Biological Reviews, 1942
SummaryColour changes in crustaceans are controlled by a secretion originating in the eye‐stalk. The glandular tissue is probably Hanström's sinus gland, although the X‐organ may also be concerned in this function. Retinal pigment migration is similarly regulated by a hormone from the eye‐stalks.
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SummaryColour changes in crustaceans are controlled by a secretion originating in the eye‐stalk. The glandular tissue is probably Hanström's sinus gland, although the X‐organ may also be concerned in this function. Retinal pigment migration is similarly regulated by a hormone from the eye‐stalks.
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1963
The Arthropods in their numbers and in their variety of species far exceed all the rest of the animal kingdom put together. Of the animals which live in fresh water a high proportion belong to this phylum. The name ‘Arthropod’ means jointed limbs, the most characteristic feature of the phylum being the fact that the numerous limbs on the body are made ...
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The Arthropods in their numbers and in their variety of species far exceed all the rest of the animal kingdom put together. Of the animals which live in fresh water a high proportion belong to this phylum. The name ‘Arthropod’ means jointed limbs, the most characteristic feature of the phylum being the fact that the numerous limbs on the body are made ...
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