Zobrazeno 1 - 10
of 12
pro vyhledávání: '"D. A. Ziemann"'
Publikováno v:
Aquaculture Research. 33:839-846
The uptake and assimilation of nitrogen and carbon by shrimp were measured in 1200 L mesocosms using stable isotope enrichments. Labels were added via 15N-, 13C-glycine and amino acid mixtures in feeds or as 15NH4+ to pond water. Label was incorporat
Autor:
R. Masuda, D. A. Ziemann
Publikováno v:
Journal of Fish Biology. 56:1239-1247
Time taken by Pacific threadfin Polydactylus sexfilis juveniles to learn a conditioning reward was taken as the criterion for learning capability. Fish of 50 mm and 90 mm LF had a better learning capability than did smaller (22 mm, 36 mm) or larger (
Publikováno v:
Marine Biology. 116:533-542
Changes in the phytoplankton population caused by a wind-induced mesoscale eddy, first located off the Hawaiian chain on 29 August 1989, were examined from 6 to 12 September 1989. These cyclonic eddies produce upwelling of nutrient-rich water into th
Publikováno v:
Marine Biology. 115:509-521
This paper describes a carbon budget for the spring phytoplankton bloom in Auke Bay, a subarctic bay in southeastern Alaska. The budget was constructed using semiweekly data on carbon production, particulate carbon in the water column, and cumulative
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 50:163-180
We tested the hypothesis that growth, condition, and mortality of four "trace" cohorts of Pacific herring, Clupea pallasi, larvae in Auke Bay, Alaska, in 1988 were limited by concentration of prey. Hatching of herring larvae coincided with the spring
Publikováno v:
Marine Biology. 109:321-334
Data on phytoplankton primary production, biomass, and species composition were collected during a 5 yr (1985–1989) study of Auke Bay, Alaska. The data were used to examine the interannual differences in the timing, duration, and magnitude of the s
Publikováno v:
Journal of Crustacean Biology. 10:648-658
Weekly estimates of female abundance and daily egg production rates were made for Pseudocalanus spp. during 1987 and 1988 in Auke Bay, southeastern Alaska. The sampling, which included measurements in primary production, was done during April and May
Nitrate and ammonium uptake by phytoplankton populations during the spring bloom in Auke Bay, Alaska
Publikováno v:
Estuarine, Coastal and Shelf Science. 30:509-524
The importance of nitrate and ammonium as phytoplankton nitrogen sources was examined by 15 N tracer experiments during the spring bloom in Auke Bay, Alaska. Nitrate and ammonium uptake rates as functions of substrate concentration and light intensit
Publikováno v:
Journal of Plankton Research. 12:759-797
Publikováno v:
Journal of Crustacean Biology. 10:69-78
The timing of spawning and onset of feeding for euphausiid larvae in Auke Bay, Alaska, was monitored for 3 years. Thysanoessa raschii was the most abundant euphausiid species in the study area. In all years the eggs were most abundant in the plankton