CONTINUOUS CULTURE OF MARINE DIATOMS UNDER SILICATE LIMITATION. I. SYNCHRONIZED LIFE CYCLE OF SKELETONEMA COSTATUM 1 2

1973 ◽  
Vol 9 (2) ◽  
pp. 175-180 ◽  
Author(s):  
Curtiss O. Davis ◽  
Paul J. Harrison ◽  
Richard C. Dugdale
Keyword(s):  
Life Cycle ◽  
Continuous Culture ◽  
Skeletonema Costatum ◽  
Marine Diatoms

CONTINUOUS CULTURE OF MARINE DIATOMS UNDER SILICATE LIMITATION. I. SYNCHRONIZED LIFE CYCLE OF SKELETONEMA COSTATUM12

1973 ◽  
Vol 9 (2) ◽  
pp. 175-180 ◽  
Author(s):  
Curtiss O. Davis ◽  
Paul J. Harrison ◽  
Richard C. Dugdale
Keyword(s):  
Life Cycle ◽  
Continuous Culture ◽  
Marine Diatoms

Influence of the Insecticide Diflubenzuron (Dimilin) on the Growth of Marine Diatoms and a Harpacticoid Copepod in Culture

1985 ◽  
Vol 42 (7) ◽  
pp. 1272-1277 ◽  
Author(s):  
N. J. Antia ◽  
P. J. Harrison ◽  
D. S. Sullivan ◽  
T. Bisalputra
Keyword(s):  
Skeletonema Costatum ◽  
Harpacticoid Copepod ◽  
Adult Survival ◽  
Thalassiosira Weissflogii ◽  
Marine Diatoms ◽  
Tigriopus Californicus ◽  
Per Se ◽  
Juvenile Development ◽  
Cyclotella Cryptica ◽  
Injurious Effects

Diflubenzuron (Dimilin) was tested, in the concentration range 0.1–5000 μg∙L−1, for possible injurious effects on the growth and photosynthesis of three chitin-producing (Thalassiosira weissflogii, T. norden-skioldii, Cyclotella cryptica) and one nonchitinaceous (Skeletonema costatum) diatoms. For comparison, the effects of the pesticide were also examined on adult survival and juvenile development of the harpacticoid copepod Tigriopus californicus. While the development of the copepod was hindered at concentrations of the order of 1–10 μg∙L−1, the diatoms were barely affected by Dimilin even at the highest concentration tested (5 mg∙L−1). We conclude that Dimilin acts specifically on insects and crustaceans as a larvicide by interfering with chitin deposition into cuticles during juvenile development through ecdysis. The lack of effect from Dimilin on the chitin-producing diatoms has suggested that the insecticide may not inhibit chitin biosynthesis per se as was previously believed, but that it presumably deregulates one or more of the larval postsynthetic processes responsible for chitin integration into cuticles.

Use of a Self-Cleaning, In-line Filter to Continuously Monitor Phytoplankton Nutrient Uptake Rates

1984 ◽  
Vol 41 (3) ◽  
pp. 540-544 ◽  
Author(s):  
J. S. Parslow ◽  
P. J. Harrison ◽  
P. A. Thompson
Keyword(s):  
Nutrient Uptake ◽  
Uptake Rate ◽  
Skeletonema Costatum ◽  
Thalassiosira Pseudonana ◽  
Ammonium Concentration ◽  
Marine Diatoms ◽  
Response Characteristics ◽  
Uptake Rates ◽  
Laboratory Cultures ◽  
Self Cleaning

Our new technique allows the decline in ambient ammonium concentration to be followed continuously during phytoplankton uptake experiments. A self-cleaning, in-line filter permits the continuous separation of cells from the medium for nutrient determination by an autoanalyzer. The technique works well with laboratory cultures of the marine diatoms Thalassiosira pseudonana and Skeletonema costatum. Changes in uptake rate on time scales of 1 min or longer can be resolved, the resolution being limited by the response characteristics of the autoanalyzer.

scholarly journals Continuous culture of marine diatoms under silicon limitation. 3. A model of Si-limited diatom growth 1

1978 ◽  
Vol 23 (1) ◽  
pp. 41-52 ◽  
Author(s):  
Curtiss O. Davis ◽  
Norman F. Breitner ◽  
Paul J. Harrison
Keyword(s):  
Continuous Culture ◽  
Marine Diatoms
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