The Pentatricopeptide Repeat (PPR) gene family produces RNA-binding proteins that target organellar transcripts. The PPR family is expanded in land plants, with nearly 450 genes identified in Arabidopsis thaliana. In plants with a Cytoplasmic Male Sterility (CMS) phenotype, members of the PPR family can act as a RESTORER OF FERTILITY...
Fluctuations and spatial heterogeneity of habitat and resources is thought to underlie niche variation in animal populations, with intraspecific differences serving to produce or maintain population-, community-, or ecosystem-level patterns. Individual diet variation, defined as individual variation in food resource use within a population that is consistent over time, is...
The paper analyses the annual accounts for the period 1990-94 of a sample of approximately 100 fishing firms operating out of ports in Schleywig-Holstein and exploiting finfish stocks in the North Sea and Baltic, and shrimp stocks in the North Sea. Detailed information is provided on costs and returns by...