Comparison of Coulter Counter and 14C measurements of Acartia tonsa (Copepoda, Calanoida) grazing on Chlamydomonas sp. (Volvocales)

Hydrobiologia ◽  
1993 ◽  
Vol 252 (3) ◽  
pp. 193-198 ◽  
Author(s):  
X. Zhang ◽  
M. H. Daro ◽  
M. L. M. Tackx
Keyword(s):  
Coulter Counter ◽  
Acartia Tonsa ◽  
Chlamydomonas Sp

Letter to the Editor: Interference of Schistocytes in a Platelet Count by a Beckman Coulter Counter

2006 ◽  
Vol 12 (4) ◽  
pp. 242-243
Author(s):  
Ferran Vall-Llovera ◽  
José-Tomas Navarro ◽  
Jose-Maria Ribera ◽  
Natalia Lloveras ◽  
Jordi Junca ◽  
...  
Keyword(s):  
Platelet Count ◽  
Coulter Counter ◽  
Letter To The Editor

Oithona davisae: naturalization in the Black sea, inter-annual and seasonal dynamics, effect on the structure of the planktonic copepod community

2019 ◽  
Vol 59 (6) ◽  
pp. 1008-1015
Author(s):  
A. D. Gubanova ◽  
O. A. Garbazey ◽  
D. A. Altukhov ◽  
V. S. Mukhanov ◽  
E. V. Popova
Keyword(s):  
Black Sea ◽  
Coastal Waters ◽  
Native Species ◽  
Significant Decline ◽  
Acartia Tonsa ◽  
The Black Sea ◽  
Copepod Community ◽  
Oithona Davisae ◽  
Sevastopol Bay

Long-term (20032014) routine observations of zooplankton in Sevastopol Bay (the Black Sea) have allowed the naturalization of the invasive copepod Oithona davisae to be studied in the Black Sea coastal waters. Inter-annual and seasonal variability of the species and their impact on the native copepod community have been analyzed. The invasion of O. davisae and their undoubted dominance in terms of abundance were shown to alter the community structure but, at the same time, the abundances of the native species did not decrease, excepting the Black Sea earlier invader Acartia tonsa. A significant decline in A. tonsa numbers over the stages of O. davisae establishment and naturalization provided evidence of competition between the species. O. davisae have been demonstrated to gain competitive advantage over A. tonsa, that ensured their fast dispersal in the Black Sea, acclimatization in the new habitat and the successful competition over native species.

“Electronic Particle Sizing as a Means of Measuring Production in a Eutrophic Lake”

1970 ◽  
Vol 5 (1) ◽  
pp. 1-8
Author(s):  
Gordon G.C. Robinson ◽  
Dennis J. Brown
Keyword(s):  
Particulate Matter ◽  
Eutrophic Lake ◽  
Coulter Counter ◽  
Particle Sizing ◽  
Particle Volume

Abstract A model “B” Coulter Counter with “J” plotter was used to determine the total volume of particulate matter and autotrophic and heterotrophic increments in particle volume in a small eutrophic lake, south of Lake Manitoba. Such increments were converted to more meaningful carbon values.

scholarly journals Fragrance materials (FMs) affect the larval development of the copepod Acartia tonsa: An emerging issue for marine ecosystems

2021 ◽  
Vol 215 ◽  
pp. 112146
Author(s):  
Marco Picone ◽  
Gabriele Giuseppe Distefano ◽  
Davide Marchetto ◽  
Martina Russo ◽  
Marco Vecchiato ◽  
...  
Keyword(s):  
Larval Development ◽  
Marine Ecosystems ◽  
Acartia Tonsa ◽  
Fragrance Materials

Cold Agglutinins and the Coulter Counter Model S

1972 ◽  
Vol 58 (5) ◽  
pp. 599.2-600 ◽  
Author(s):  
Jannie A. De Lange ◽  
George J. Eernisse ◽  
Jan J. Veltkamp
Keyword(s):  
Coulter Counter ◽  
Cold Agglutinins ◽  
Counter Model

On the Nutrition and metabolism of zooplankton IV. The forms of nitrogen excreted By Calanus

1967 ◽  
Vol 47 (1) ◽  
pp. 113-120 ◽  
Author(s):  
E. D. S. Corner ◽  
B. S. Newell
Keyword(s):  
Amino Acids ◽  
Positive Reaction ◽  
Laboratory Experiments ◽  
Long Island Sound ◽  
Acartia Tonsa ◽  
Nitrogenous Compounds ◽  
Nitrogenous Substances ◽  
Experimental Density ◽  
Island Sound ◽  
Calanus Helgolandicus

A study has been made of the nitrogenous compounds excreted by Calanus helgolandicus (Claus) collected at Plymouth.Most of the excreted nitrogen is in the form of ammonia which accounts for 60–100% (average 74.3%) of the total, and some of the remainder may be lost as urea. There is no evidence for the excretion of measurable amounts of amino acids.Whether the animals are starved or fed they are primarily ammonotelic, and the quantity of ammonia produced at 10° C (3.33 μg/g. dry body wt/day) is not significantly changed when the animals are used at an abnormally high experimental density. This latter condition does, however, lead to the production of large quantities of additional nitrogenous substances that give a positive reaction with ninhydrin.IntroductionThe amounts of nitrogen excreted by zooplankton have been measured by several workers. Harris (1959) used the method of Riley (1953) to estimate the copious quantities of ammonia produced by animals (mainly Acartia tonsa and A. clausi) collected from Long Island Sound; Beers (1964), in laboratory experiments with the chaetognath Sagitta hispida, estimated the excreted ammonia by the procedure of Kruse & Mellon (1952); and Corner, Cowey & Marshall (1965) determined the ammonia excreted by Calanus helgolandicus and C. finmarchicus, using a ninhydrin technique described by Moore & Stein (1954). The methods employed by Harris and by Beers are specific for ammonia: that used by Corner et al. estimates nitrogenous substances (e.g. amino acids) in addition to ammonia, but certain tests were made which seemed to exclude the possibility that these substances contributed significantly to the nitrogen excreted by the animals.

Design and fabrication of a micromachined Coulter counter

1999 ◽  
Vol 9 (2) ◽  
pp. 159-161 ◽  
Author(s):  
M Koch ◽  
A G R Evans ◽  
A Brunnschweiler
Keyword(s):  
Coulter Counter
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