IN a recent issue of Genetics, RoyChoudhury and Stephens (2007) showcased a new method for estimating the population scaled mutation rate u from microsatellite data; u is equivalent to four times the effective population size times the mutation rate per generation and can also be viewed as the scaled population size. Their approximation delivered impressively accurate results with little bias. ...

In the gill of the blue mussel Mytilus edulis, the lateral cilia, which are responsible for producing feeding currents, are neuronally activated (Aiello, 1960). The neurotransmitter is serotonin (Aiello, 1962), known to raise cAMP levels in the gill (Malanga and Poll, 1979). The functional target of cAMP action appears to be certain low molecular mass polypeptides that co-extract with the cilia...

Knock down efficacy of commercially available insecticides against Anopheles gambiae Nicholas K. Makworo , Vincent O. Ochieng, Dorington Ogoyi, Richard W. Mukabana

果 はcortisoneに よる直接作 用で あるか否か,脾 臓の 萎縮 を始め とす る網 内系 の機能低下 はcortisoneの 作 用効果 として如何程 の意義 をもつ ものであるか,又 そ の2次 的影響 は広範 なcortisone効 果か ら如何に区別 され てい るのか,今 回はこれ等の疑 問に対 して進 めた 検討の結果について,即 ち, cortisoneの ウイルス感 受性上昇効果 は網 内系 ホルモンと して理解 さるべ きも の ゝ欠乏に よる2次 的影響で あること,そ して更 に網 内系 ホルモ ンは生体 内の酵素作用に も密 なる影響 を及 ぼ し,上ウイル ス感受性 を規定す る上に重要 な役割 を果 してい ることを報告 する と共に,併 せて新 たに追加 さ るべ き生体 の内分泌性防衛 機転即 ち,副 腎皮質 と網内 系 との間の ホルモ ン連...

The East African jumping spider Evarcha culicivora feeds indirectly on vertebrate blood by preferentially preying upon blood-fed Anopheles mosquitoes, the vectors of human malaria1, using the distinct resting posture and engorged abdomen characteristic of these specific prey as key elements for their recognition. To understand perceptual categorization of objects by these spiders, we investigat...

BACKGROUND Although urban malaria transmission is low and seasonal, it remains a major public health problem. This study aimed at demonstrating the presence of Anopheles mosquitoes and their potential to transmit malaria in urban settings. METHODS Two cross-sectional surveys were carried out in Blantyre District, Malawi, during the dry and wet seasons of 2008 and 2010, respectively. A map of ...

Background: Malaria is a former endemic problem in the Camargue, South East France, an area from where very few recent data concerning Anopheles are available. A study was undertaken in 2005 to establish potential malaria vector biology and dynamics and evaluate the risk of malaria reemergence. Methods: Mosquitoes were collected in two study areas, from March to October 2005, one week every two...