Ecological theory suggests that frequency-dependent predation, in which more common prey types are disproportionately favored, promotes the coexistence of competing prey species. However, many of the earlier empirical studies that investigated the effect of frequency-dependent predation were short-term and ignored predator-prey dynamics and system persistence. Therefore, we used long-term obser...

A cytogenetic study was conducted on five species of the genus Pimelodus collected from various regions in Brazil: Pimelodus heraldoi, Pimelodus sp, Pimelodus argenteus, P. maculatus and P. mysteriosus. All the species had 2n=56 chromosomes. AgNOR was found in one pair of subtelocentric (ST) chromosomes with staining at the terminal position in all the five species. However, Pimelodus sp, P. he...

Thermal tolerance parameters of swordtail (Xiphophorus maculatus) and platy (X. helleri) at three acclimation temperatures were determined in the study. The CTMin values 20, 24 28°C temperature 9.41,10.42 11.95°C respectively for 9.38,11.5 13.23°C swordtail, while CTMax 37.41, 39.19 40.52°C 36.94, 38.89 40.07°C swordtail. Accordingly, affected lower upper tolerances fish by 3-4 °C. ARR varied b...

Hemicelluloses, such as xyloglucan, xylan and mannans, consist of a heterogeneous array of plant-derived polysaccharides that form the plant cell wall. These polysaccharides differ from each other in their structure and physiochemical properties, but they share a β-(1,4)-linked sugar backbone. Hemicelluloses can be hydrolyzed by plant-cell-wall-degrading enzymes (PCWDEs), which are widely distr...

Despite their unparalleled biodiversity, the genomic resources available for beetles (Coleoptera) remain relatively scarce. We present an integrative and high quality annotated transcriptome of the beetle Callosobruchus maculatus, an important and cosmopolitan agricultural pest as well as an emerging model species in ecology and evolutionary biology. Using Illumina sequencing technology, we seq...

no doubt, damage and losses inflicted by callosobruchus maculatus to stored products in general and chickpea in particular can be significant. the objective of this work was to evaluate the effect of the verbascum sinuatum powder on c. maculatus oviposition behavior in chickpea under laboratory conditions (30 °c, 60% relative humidity). powder of mullein plant (v. sinuatum) caused reduction in ...

Lateolabrax maculatus is an important economic fish species in China. It a eurysaline and can survive grow water environment with varieties of salinity. practical significance to study the tolerance adaptability L. maculatus, because it usually suffers from sudden increase or decrease salinity aquaculture environment. This work investigated eff...

Bruchids are the most important pests of leguminous seeds in world. In this study, focus was done on Callosobruchus maculatus, a serious pest Vigna unguiculata seeds. As no efficient control methods preventing collateral effects beneficials currently exist, study investigated whether RNA interference (RNAi) could provide new biotechnological and selective tool for bruchids control. Three princi...

The biological activity of essential oil extracted from coriander, Coriandrum sativum L. (Apiaceae), seeds against adults of Tribolium confusum Duval (Coleoptera: Tenebrionidae) and Callosobruchus maculatus F. (Coleoptera: Bruchidae) was investigated in a series of laboratory experiments. Fumigant toxicity was assessed at 27 ± 1°C and 65 ± 5% R.H., in dark condition. Dry seeds of the plant were...