Improving the lipid composition of feed-rotifers enhances survival and growth rates juvenile fish in aquaculture, but monitoring enrichment profiles using gas chromatography (GC) is slow, labour-intensive requires expensive instrumentation. Here, we describe potential Raman spectroscopy as an alternative, more rapid tool for quantitation rotifer fatty acid aquaculture setting. A compositionally...

Abstract Brachionus calyciflorus is a species complex consisting of four recently described species. Although several lines evidence support their status, hybridization between two the sibling B. s.s. and elevatus has been inferred from both field laboratory studies. In this study, we tested for existence prezygotic barriers these by performing types cross-fertilization experiments. ‘mate compe...

1. It has been proposed that growth and reproduction of animals is frequently limited by multiple nutrients simultaneously. To improve our understanding of the consequences of multiple nutrient limitations (i .e. co-limitation) for the performance of animals, we conducted standardized popUlation growth experiments using an important aquatic consumer, the rotifer Brachionus calyciflorus. 2. We c...

Chronic lead (Pb) toxicity tests with Brachionus calyciflorus, Chironomus tentans, and Lymnaea stagnalis were performed in artificial freshwaters. The no-observable-effect concentration (NOEC), lowest-observable-effect concentration (LOEC), and calculated 20% effect concentration (EC20) for the rotifer B. calyciflorus were 194, 284, and 125 microg dissolved Pb/L, respectively. The midge C. tent...