Results 101 to 110 of about 159 (136)

Holocene development of the fauna of Lake Boeckella, northern Antarctic Peninsula

Holocene, 2006
The origins of the freshwater fauna that inhabits Antarctic lakes are poorly known. The species present today could be relict species that have survived Quaternary glaciations on the continent, or Holocene migrants from more temperate regions. One approach to investigating these questions is to study faunal microfossils in lake sediment. This approach
John A E Gibson
exaly   +2 more sources

Tuzetia boeckella sp. nov. (protozoa: Microsporida), a parasite of Boeckella triarticulata (Copepoda: Calanoidea) in Australia

Journal of Invertebrate Pathology, 1982
Abstract A hitherto undescribed microsporidan has been found in the Australian freshwater copepod, Boeckella triarticulata, collected from Lake Burley Griffin, Canberra. We name this protozoan Tuzetia boeckella n. sp. and describe it in this paper. Large numbers of spores were found in the muscle of both sexes and all stages of the animals.
R.J. Milner, J.A. Mayer
openaire   +1 more source

Contribution of rotifers to the diet and fitness of Boeckella (Copepoda: Calanoida)

Freshwater Biology, 1999
1. The calanoid copepods, Boeckella triarticulata Sars and Boeckella hamata Brehm, are major components of the freshwater zooplankton of New Zealand. It was not known whether these copepods ingest rotifers, nor whether the inclusion of rotifers in their diets might improve their fitness.
Kyleigh M. Couch, Carolyn W. Burns, John J. Gilbert   +2 more
openaire   +1 more source

Boeckella major (Copepoda: Calanoida): a predator in Australian ephemeral pools

Fundamental and Applied Limnology, 1999
La Trobe University Faculty of Science, Technology and Engineering Murray Darling Freshwater Research CentreMDFRC item.Small ephemeral pools in the Murray-Darling basin, Australia, that dry annually lack fish and are dominated by microfauna. Community size structures and species diversity are very variable and many ponds contain one or more of the ...
Green, John D., Shiel, Russell J., Littler, Ray A.   +2 more
openaire   +1 more source

The biogeography of three Boeckella species (Copepoda: Calanoida) in New Zealand

Hydrobiologia, 1988
The New Zealand distributions of three species of Boeckella (Copepoda, Calanoida), B. triarticulata, B. dilatata and B. hamata are mapped. B. triarticulata is primarily a pond dweller but is also found in reservoirs and shallow lakes. B. dilatata is mainly found in the deeper glacial lakes and ponds in the central region of the South Island and B ...
exaly   +2 more sources

Life History Consequences of Food Quality in the Freshwater Copepod Boeckella triarticulata

Ecology, 1998
Food quality often has profound effects on life history traits and individual fitness, altering rates of growth and development, changing the timing of reproduction, and shifting the trade-off between egg size and egg number. Few data are available on the effects of food quality on copepod life history traits. We measured several life history traits on
Saran Twombly, Nancy Clancy, Carolyn W. Burns   +2 more
openaire   +2 more sources

Parasitic regulation in a population of Boeckella hamata Brehm (Copepoda: Calanoida)

Freshwater Biology, 1989
SUMMARY. 1. The impact of parasitism by a fungus Aphanomyces sp. (Phycomycetes: Saprotegniaceae) on a population of Boeckella hamata in Lake Mahinerangi in New Zealand was studied over 20 months. The incidence of infection among adult female copepods exceeded 12% throughout winter (May‐October) and was highest in autumn (46%) when population birth ...
exaly   +2 more sources

Temperature effects on oxygen consumption by the copepod Boeckella dilatata

New Zealand Journal of Marine and Freshwater Research, 1977
Abstract The rate of oxygen uptake by Boeckella dilatala collected from Lake Hayes was measured at four different temperatures using the micro‐Winkler technique. The rate of oxygen consumption increased with increasing temperature between 10°C and 20°c, and then declined ...
J. D. Green, M. A. Chapman
openaire   +1 more source

Predation by the centropagid copepod, Boeckella major, structuring microinvertebrate communities in the absence of fish

SIL Proceedings, 1922-2010, 2001
La Trobe University Faculty of Science, Technology and Engineering Murray Darling Freshwater Research CentreMDFRC item.
Green, John D., Shiel, Russell J.
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Boeckella antiqua n. sp. (Copepoda, Calanoida, Centropagidae) from Patagonia

Hydrobiologia, 2000
Boeckella antiqua n. sp. from samples collected in an ephemeral pond on the Patagonian plateau is described and illustrated. Diagnostic features of B. antiqua are almost exclusively related to the male fifth pair of legs, females being almost indistinguishable from those of the closely related B. poppei. The two-segmented, spine-bearing left endopod of
Silvina Menu-Marque, Esteban Balseiro
openaire   +1 more source