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Apus and a Rare Cladoceran in Britain
Nature, 1948THE primitive crustacean known as apus, or Triops cancriformis (Bosc), which is of particular interest to zoologists, has only been recorded five times in Britain. It was found in 1738 in Kent1, at the beginning of last century near Christchurch in Hampshire2, a little later at Bristol3, in 1907 in Kirkcudbrightshire4, and in 1934 near Fordingbridge in
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The penetration of cladocerans into saline waters
Hydrobiologia, 1993Cladocerans are essentially freshwater organisms, many of which have been able to penetrate slightly saline waters (up to 5% salinity), both thalassic and athalassic, some of which occur at higher salinities, and a few of which, mostly non-chydorids, penetrate still higher salinities (15—30% and even higher) and may be confined to these salinities ...
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Foraging Responses of Littoral Cladocerans
1979Cette thèse consiste en deux manuscrits qui examinent les réponses de broutage de Sida crystallina, Chydorus sphaericus et Alona affinis en fonction des variations naturelles dans leurs ressources alimentaires (en suspension et périphytique). Le premier manuscrit introduit une méthode de mesure in situ des taux d'élimination des particules en ...
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Lateral compression and visibility in cladocerans
Limnology and Oceanography, 1981A simple mathematical model suggests that lateral compression affects a cladoceran’s visibility to fish. The results of a simple test using the lengths and widths of cladocerans suggest that handling by copepods probably does not exert any significant selection on lateral compression in cladocerans, but fish gill rakers and visibility to fish might ...
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Miniature genomes and endopolyploidy in cladoceran crustaceans
Genome, 1989The haploid genome sizes (0.37 and 0.47 pg) of two members of the cladoceran crustacean genus Daphnia rank among the smallest known for Crustacea. An examination of cladoceran somatic tissues by scanning microdensitometry revealed abundant endopolyploidy in both species.
Margaret J. Beaton, Paul D. N. Hebert
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Competition and the Relative Abundances of Two Cladocerans
Ecology, 1973Two cladocerans, Daphnia parvula and Holopedium gibberum, were studied to determine (a) whether the species were competing and (b) whether the observed coexistence was predictable from competitive relationships alone. Experimental manipulations of intra— and interspecific competition using 14C—labelled algae, bacteria, and detritus revealed clear ...
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