Muizen

Wildlife species in danger of disappearing from East Anglia

Experts from Suffolk Wildlife Trust, Buglife and the RSPB have all pointed to species in danger of disappearing from East Anglia. They include stone curlew - only 202 pairs nested in the East of England last year; the shrill carder bee - common in the region 25 years ago but now found only in the Thames Gateway area; and the crested cow-wheat - a plant limited to a small number of roadside verges because grassland has disappeared to farming or construction. Indeed, habitat destruction and human disturbance are cited as the two most common reasons these species are on the brink.

Gartenschläfer in Bonn kämpfen um ihr Leben

Der Bestand der Gartenschläfer ist in den vergangenen Jahren drastisch zurückgegangen. Auch in Bonn sind sie noch heimisch. Wissenschaftler untersuchen die Population. In einigen Regionen gelten die Tiere mit der markanten Gesichtszeichnung, die an Zorros Maske erinnert, als ausgestorben. In Europa hat sich der Bestand in den vergangenen 30 Jahren halbiert. Weshalb ist völlig unklar. In Bonn haben sich allerdings wieder einige Gartenschläfer (Eliomys quercinus), die wie Haselmaus und Siebenschläfer zur Gattung der Schlafmaus zählen, angesiedelt.

Exposure to imidacloprid during early development induces long-lasting changes in behavior and brain function in mice

We assessed the effects of the neonicotinoid imidacloprid (IMI) in adult male and female mice after in utero and early postnatal exposure. Pregnant mice were infused with IMI (0.5 mg/kg/day) from gestational day 4 to the end of nursing at postnatal day 21. The young adult offspring were studied in a series of biochemical and behavioral tests. To assess reproducibility, the behavioral analyses were conducted in three separate studies using multiple exposed litters. Exposure to IMI reduced fecundity, and in adult offspring, decreased body weight in male but not female pups.

Without Birds, Lizards, and Other Vertebrate Pollinators, Plant Reproduction Could Decline by Two-Thirds

Bees tend to get the most attention as pollinators critical to the survival of plant species. But lizards, mice, bats, and other vertebrates also act as important pollinators. A new study finds that fruit and seed production drops an average 63 percent when vertebrates, but not insects, are kept away from plants.

Health Risks of Pesticides

Pesticides are a convenient way to get rid of the pests in our homes and gardens and on the farms that grow the food we eat. Yet, the increased use of pesticides has been linked to a number of serious health risks. Some pesticides are irritating to the skin and eyes. Others, including organophosphates, have been linked to nervous system damage and to the development of Parkinson's disease. Pesticide exposure has also been associated with a greater risk for some cancers, including non-Hodgkin's lymphoma.

Clothianidin induces anxiety-related behavior in male mice

Experimental studies have revealed that neonicotinoids pose potential risks for the nervous systems of non-target species, but the brain regions responsible for their behavioral effects remain incompletely understood. This study aimed to assess the neurobehavioral effects of clothianidin (CTD), a later neonicotinoid developed in 2001 and widely used worldwide, and to explore the target regions of neonicotinoids in the mammalian brain.

Perplexing decline in the American kestrel population is related to lack of prey

Not so long ago, on a drive down a rural road in Minnesota you’d often see an American kestrel (Falco sparverius) perched on a power line, watching for a dragonfly or small rodent to pass beneath. If you were really lucky, you’d spot this smallest member of the falcon family flapping its wings in its unusual hovering flight as it watched for prey. Such sights are becoming increasingly rare. These handsome little raptors, about the size of a mourning dove, are suffering a long-term and widespread population decline.

Naturschützer warnen, dass das Insektensterben auch die Feldermäuse ausrotten könnte

Die Fledermäuse erwachen momentan aus dem Winterschlaf. Nachts gehen sie auf die Jagd, um ihre leeren Reserven aufzutanken. Doch sie finden kaum noch Futter. „Seit einiger Zeit beobachten wir einen alarmierenden Rückgang von Insekten“, sagt Karl Kugelschafter, Fledermausexperte vom Naturschutzbund (Nabu). Für die Fledermäuse geht es ums Überleben, denn sie ernähren sich fast ausschließlich von Insekten und müssen pro Tag ungefähr ein Drittel ihres Körpergewichtes an Nahrung zu sich nehmen. Hochgerechnet braucht ein einzelnes Tier also ungefähr ein Kilogramm Insekten in einem Sommer.

Chronic exposure to low levels of organophosphate insecticide may cause diabetes

A study by scientists at Madurai Kamaraj University, Tamil Nadu, has found evidence that chronic exposure to organophosphate insecticides induces diabetes and impaired glucose tolerance in both humans and mice. The researchers found that organophosphate-induced diabetes was mediated by gut bacteria. The results were published in the journal Genome Biology.

Induction of abnormal behaviours in mice after in utero and early postnatal exposure to imidacloprid

Imidacloprid (IMD), a neonicotinoid insecticide, is the most widely used insecticide on the planet. The purpose of this study was to examine the behavioural and biochemical effects of chronic in utero and early postnatal IMD exposure. Our treatment regimen entailed chronic exposure whereby pregnant mice were infused with 0.5 mg/kg/day of IMD via a subcutaneous osmotic mini-pump from gestational day 3 to postnatal day 21.