Some rare and new caddis flies recorded for the Netherlands (Trichoptera)

Contains fulltext : 35412.pdf (publisher's version ) (Open Access)Since Higler published his list of extinct and endangered caddis flies species in 1995 a number of new and rare species were recorded for the Netherlands. These new findings can be partly attributed to the growing interest among researchers to study caddis flies, which has resulted in a more thorough investigation of certain water types. Other records of rare species were discovered by collecting and identifying pupae and adults, such as Hydroptila vectis and Oxyethira falcata. Some rare species, which have not been recorded since 1950, are common nowadays, possibly caused by the improved water quality of the river systems in the Netherlands. Other new species to the Dutch fauna are the result of new taxonomic insights

Psychometrically and qualitatively validating a cross-national cumulative measure of fear-based xenophobia

.40. The result, a cross-national 5-item scale measuring fear-based xenophobia, was tested by means of the Three-step Test-Interview (Hak, Van der Veer and Jansen 2008) with 10 students in The Netherlands and 10 students in Norway. The analysis of these qualitative interviews shows that individual respondents’ criteria for the ranking of the scale items strongly depend on the way immigrants are framed. Ranking according to different levels of fear turned out to be only one criterion out of several possible ones used by individual respondents. Keywords Xenophobia . Measurement . Mokken Scale Procedure . Cross-cultural . qualitative validation . Three-Step Test-Intervie

De Nederlandse kokerjufferlarven; determinatie en ecologie

Kokerjufferlarven leven in het water, zijn niet zo makkelijk te vinden en zijn daardoor een onbekende groep insecten. Toch zijn het boeiende diertjes en indicatoren voor schoon water. Dit boek geeft een compleet beeld van alle 150 Nederlandse soorten, plus determinatietabe