Results 181 to 190 of about 67,459 (225)
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2010
The class Ostracoda is made up of small crustaceans, with a shell size generally ranging from 0.2 to 30 mm, living in a wide variety of aquatic environment, from deep-sea waters to the proximity of hydrothermal springs. A small number of species has been recorded in damp terrestrial environments. The majority of the taxa have a wholly benthic lifestyle,
Aiello G., BARRA, DIANA
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The class Ostracoda is made up of small crustaceans, with a shell size generally ranging from 0.2 to 30 mm, living in a wide variety of aquatic environment, from deep-sea waters to the proximity of hydrothermal springs. A small number of species has been recorded in damp terrestrial environments. The majority of the taxa have a wholly benthic lifestyle,
Aiello G., BARRA, DIANA
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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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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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Effects of Parasitic Crustacea on Hosts
Parasitic Crustacea, 2019Stewart C Johnson, Z. Kabata, B. Nowak
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Improved methodology of ‘conchostracan’ (Crustacea: Branchiopoda) classification for biostratigraphy
, 2015F. Scholze, J. Schneider
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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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