Beschikbaarheid van meetwaarden uit het Landelijk Meetnet Luchtkwaliteit voor de periode 1976-1990

The Dutch National Air Quality Monitoring Network is operational since 1976. This report presents an overview of the measurement sites and the availability of data from the sites for the period 1977-1990 as far as available in the automated data base of the laboratory for Air Research. Overviews are presented for the following components [in brackets the starting year of the monitoring activity is geven]: - gaseous components: CO [1977], NOx 1977], O3 [1977] and SO2 [1976 ; - aerosols etc.: black smoke 1987], acidifying compounds [1987], metals [1987], tsp [1987 ; - chemical composition of precipitation: bulk components [1978], microcomponents [1983 ; - meteorological parameters: global radiation [1977], temperature [1987], wind direction [1977], wind speed [1977].<br

Availability of measurement results from the Dutch National Air Quality Monitoring Network for the period 1976-1990

The Dutch National Air Quality Monitoring Network is operational since 1976. This report presents an overview of the measurement sites and the availability of data from the sites for the period 1977-1990 as far as available in the automated data base of the laboratory for Air Research. Overviews are presented for the following components [in brackets the starting year of the monitoring activity is geven]: - gaseous components: CO [1977], NOx 1977], O3 [1977] and SO2 [1976 ; - aerosols etc.: black smoke 1987], acidifying compounds [1987], metals [1987], tsp [1987 ; - chemical composition of precipitation: bulk components [1978], microcomponents [1983 ; - meteorological parameters: global radiation [1977], temperature [1987], wind direction [1977], wind speed [1977].DGM/

Cryptic Female Choice in Crustaceans

Cryptic female choice may be common among crustaceans , but few studies have thoroughly examined it in this diverse taxonomic group. Herein, we summarize current genetic evidence for multiple paternity and skewed offspring ratios in crustaceans, and document observations that could suggest cryptic female choice. Behaviors indicative of cryptic female choice have been reported from numerous crustacean taxa (e.g., crayfish , hermit crabs , isopods ), showcasing a diverse array of behavioral mechanisms such as failed copulations, spermatophore removal , selective sperm passage, chemical signaling , adjusting duration of receptivity, delayed copulation , or discriminative reproductive investment in favor of preferred males. We highlight a few case studies, in which a suite of different cryptic behaviors permits females to maintain control over fertilizations. The possibility of selective sperm–egg interactions is briefly discussed, and parallels to other aquatic invertebrates are drawn revealing similar cryptic choice mechanisms. The disparity of body forms and reproductive strategies found in crustaceans and the fact that they inhabit many different habitats with variable selective environments makes them an ideal model taxon for future studies on cryptic female choice