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Digital zooplankton image analysis using the ZooScan integrated system
It is demonstrated that the ZooScan system can produce useful measures of zooplankton abundance, biomass and size spectra, for a variety of ecological studies and evaluates the accuracy of the Zoo scan for automated measurements of body size.
Sustained fecundity when phytoplankton resources are in short supply: Omnivory by Calanus finmarchicus in the Gulf of St. Lawrence
Evidence suggests that heterotrophic microplankton frequently provided a prey resource for net lipid synthesis as well as for egg production, and contrary to classical, linear food-chain models, variations in egg production of C. jinmarchicus were therefore not prcdictablc from variations in standing stocks of autotrophic cells.
A vertical life table approach to zooplankton mortality estimation
The vertical approach may provide mortality estimates under conditions in which horizontal techniques are inappropriate, and results obtained from application of the vertical approach to the copepod Pseudocalanw newmani are comparable to those obtained independently by a horizontal method.
Growth kinetics of the omnivorous oligotrich ciliate Strombidium sp
The species composition of a ciliate assemblage can markedly influence the fate of microbial loop production, and it is found that Strombidium grew inefficiently when feeding as a bacterivore, with gross growth efficiencies of 1 l-20% (determined on a nitrogen, carbon, and protein-specific basis).
Coherence of long-term variations of zooplankton in two sectors of the California Current System
Two tests for ecosystem shifts, a sequential algorithm and the cumulative sum of anomalies approach, failed to detect changes in 1976–1977 in total carbon biomass, displacement volume, or most individual major taxa, suggesting that aggregated biomass is an insensitive indicator of climate forcing.
The Demographic Benefits of Diel Vertical Migration by Zooplankton
The behavioral variation documented here confirms that diel vertical migration is dynamic rather than a fixed, invariant behavioral trait within a population, and predator avoidance by Pseudocalanus newmani confers a fitness advantage upon a population that migrates across a thermocline.
Euphausiids of the world ocean
This interactive and beautifully illustrated CD-ROM contains an up-to-date taxonomic reference work on the order of Euphausiacea, from the Scripps Institution of Oceanography, including full systematic descriptions, taxonomy, biogeography, references, colour photographs and drawings.
Trait-based approaches to zooplankton communities
It is proposed that the use of trait-based approaches is a promising way to reduce complexity while retaining realism in developing novel descriptions of zooplankton in ecosystem models.
Analysis of abrupt transitions in ecological systems
The occurrence and causes of abrupt transitions, thresholds, or regime shifts between ecosystem states are of great concern and the likelihood of such transitions is increasing for many ecological
Planktivorous auklet Ptychoramphus aleuticus responses to ocean climate, 2005: Unusual atmospheric blocking?
[1] In spring-summer 2005, anomalous atmospheric-oceanographic coupling caused unprecedented reproductive failures and redistribution of a planktivorous marine bird in both central California (37°N)