English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

We tested the influence of different types of food on the fitness of  Daphnia longispina  during a period of poor resources by comparing the growth and reproduction of individuals fed on different diets. When  Daphnia  were under starvation conditions, both dissolved organic carbon and metabolic products enhanced bacterial growth, and the cladoceran produced 15 neonates and survived for the 55 days of experiment. In the natural water, the edible food consisted essentially of bacteria and heterotrophic flagellates, which enabled the cladoceran to grow and reproduce. In water enriched with  Cryptomonas  (an alga) or  Chilomonas  (a heterotrophic flagellate), the daphnid growth rates increased considerably from generation to generation, but later in the time course of the experiment with  Chilomonas  than with  Cryptomonas . This alga enhanced the phosphorus:carbon ratio. The primiparous daphnids fed with  Cryptomonas  were smaller than those fed with the heterotrophic flagellate and enrichment with the heterotrophic flagellate also enhanced reproduction. In Lake Tazenat, when the algal biomass was insufficient to support the  Daphnia  life cycle, the heterotrophic organisms were an essential food source. When feeding essentially on bacteria,  Daphnia  has the capacity to grow and reproduce at very low food concentrations, and this is important in determining its fitness under competitive conditions.

The influence of autotrophic and heterotrophic foods on the demography of Daphnia longispina under starved, semi-natural and enriched conditions