A field trial was carried out to study the effect of lambdacyhalothrin on Anopheles maculatus in trap huts in Jeram Kedah, Negeri Sembilan, Malaysia. Two trap huts were built, of which one was sprayed with lambdacyhalothrin at a dosage of 25 mg ai/m2 and the other served as control. Eight collectors commenced collecting mosquitos from 1900 to 2400 hours, two each indoors and outdoors. Bioassay ...

Five New World species of Chrysotus Meigen are redescribed, four of them herein transferred from Diaphorus Meigen: C. angustifrons (Robinson), comb.nov., C. maculatus (Parent), comb.nov. (= D. maculipennis Robinson), C. robustus (Robinson), comb.nov., C. spectabilis (Loew) and C. wirthi (Robinson), comb.nov. The female of C. maculatus is described for the first time. Terminalia of both males an...

Hemibarbus maculatus is a globally important species for its value in fisheries and aquaculture. There relatively little information available about this species' sexual development genes. Therefore, study, we used the technology of high-throughput RNA sequencing (RNA-seq), to investigate if ovary testis' differently expressed genes (DEGs) during sex differentiation H. maculatus. Our results re...

Genetic incompatibilities are commonly observed between hybridizing species. Although this type of isolating mechanism has received considerable attention, we have few examples describing how genetic incompatibilities evolve. We investigated the evolution of two loci involved in a classic example of a Bateson-Dobzhansky-Muller (BDM) incompatibility in Xiphophorus, a genus of freshwater fishes f...

The genus Xiphophorus comprises 23 recognized (and two unnamed) species of live-bearing fishes that populate freshwater habitats on the Atlantic slopes of Mexico, Guatemala, Belize, and Honduras. Members of this genus possess a relatively low degree of post-fertilization (post-zygotic) reproductive isolation with one another. In native habitats combinations of spatial, ecological, behavioral, a...

This work investigated the relationship between water characteristics and infestation of protozoan parasites, Icthyophthirius multifiliis and Trichodina sp., in swordtails (Xiphophorus helleri) and platy (Xiphophorus maculates) collected in an ornamental fish farm in São Paulo, Brazil. Fish were monthly collected from ponds and tanks for one year. The prevalence rates in fish from tanks and pon...

Ten polymorphic microsatellite markers (five tetra-, one compound tetra-, one octa- and three dinucleotides) were isolated and characterized for Galaxias maculatus, a fish species widely distributed in the Southern Hemisphere. Markers were tested in 89 individual samples from a single location and the number of alleles ranged between 2 and 28. Observed and expected heterozygosities ranged from ...

The cowpea weevil, Callosobruchus maculatus, is a major threat to stable production, especially in storage, and has been reported facilitate postharvest losses grains. Host resistance suggested as the best control method but with conflicting knowledge on source of resistance. Hence, study seeks evaluate seed storage proteins (SSPs) coat compounds (SCCs) associated tolerance C. maculatus. SSPs S...

Interspecific resource competition is expected to select for divergence in resource use, weakening interspecific relative to intraspecific competition, thus promoting stable coexistence. More broadly, because interspecific competition reduces fitness, any mechanism of interspecific competition should generate selection favoring traits that weaken interspecific competition. However, species also...