ISSN:0020-9309    

DOI:10.1002/iroh.19760610332

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

摘要:

AbstractExperiments designed to determine the photosynthetic capacity and efficiency of the phytoplankton of a small body of water were performed for a twelve month period. The experimental design was able to distinguish between actively growing large populations and those which were senescent.

ISSN:0020-9309    

DOI:10.1002/iroh.19760610302

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

摘要:

AbstractThe marine amphipodCalliopius laeviusculuswas grown in the laboratory under maximum food levels at 8°C, 12°C, and 15°C. The effects of body size and temperature on all budget parameters were determined and equations describing each parameter as a function of body carbon and nitrogen content were used to construct and check the balance of the budgets. The energetics of the amphipod are discuss

ISSN:0020-9309    

DOI:10.1002/iroh.19760610303

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

摘要:

AbstractBacteria isolated from surface sea waters, brackish waters and from algal cultures were studied to attempt a nutritional clustering. A hierarchical method, using aggregation according to variance, was used to compute the data. Six nutritional groups had been separated by differences in genus composition and nutritional characteristics. Groups range from one with bacteria which are poorly versatile, i.e. attach few different substances, and which grow on sugars, amino‐acids and organic acids without any selectivity, to one with bacteria which are versatile, and which attack numerous organic acids and amino‐acids, but only a few sugars. Bacteria from different origins are not spread randomly in the different clusters. Strains isolated from algal cultures are mainly associated with the lowest versatility; those isolated from the undiluted sea water are associated with the highest versatility. Bacteria from diluted sea waters appear to be intermediate in regard to their capability of using organic substances as their sole source of carbon. It also appears that organic acids provide individually the most discriminating substrates, i.e. the most useful for separating individual groups, but amino‐acids and organic acids, as a whole, are not easy to use in classification, because they are too heterogeneous. Sugar contribution to classification is almos

ISSN:0020-9309    

DOI:10.1002/iroh.19760610304

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

摘要:

AbstractThe present investigation re‐examines hydrological features, the inorganic phosphate distribution and primary productivity near the “Hyères” Islands in the French Mediterranean in the early summer divergence zone as previously studied by MINAS and BLANC (1970). In addition, concentrations of particulate nitrogen, Chl‐aand nitrate have been determined. Uptake rates of15N‐labelled nitrate (“new production”) and the oxygen consumption (ETS‐activity) by the phytoplankton population hav

ISSN:0020-9309    

DOI:10.1002/iroh.19760610305

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

摘要:

AbstractLarvae ofTropisternus lateralis nimbatus(SAY) were reared in the laboratory using different feeding regimes. Controls were fed as many mosquito larvae as they would readily eat until the later larval stages. Experimental groups were reared on a reduced number of larvae per day. The duration of stages, growth ratios, mortality rates, and elytral lengths in the control and experimental groups are compared.

ISSN:0020-9309    

DOI:10.1002/iroh.19760610306

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

ISSN:0020-9309    

DOI:10.1002/iroh.19760610308

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

ISSN:0020-9309    

DOI:10.1002/iroh.19760610309

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

ISSN:0020-9309    

DOI:10.1002/iroh.19760610311

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY

ISSN:0020-9309    

DOI:10.1002/iroh.19760610312

出版商:Akademie Verlag, Berlin    

年代:1976

数据来源: WILEY