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Full-Text Articles in Life Sciences
Notes On Various Theories Regarding The Islamization Of The Malay Archipelago, Syed Farid Alatas
Notes On Various Theories Regarding The Islamization Of The Malay Archipelago, Syed Farid Alatas
farid alatas
In the study of the history of the Islamization of the Malay Archipelago (present-day Malaysia and Indonesia) various theories and points of view have been presented and the issue of objectivity arises in this context as clearly as in any writing of history. Mannheim's thesis that "the greatest comprehensiveness and the greatest fruitfulness in dealing with empirical materials" are the criteria to be applied in the choice between various interpretations' would seem to be relevant also in this case.
Use Of Nest Material As Insecticidal And Anti-Pathogenic Agents By The European Starling, Larry Clark, J Russell Mason
Use Of Nest Material As Insecticidal And Anti-Pathogenic Agents By The European Starling, Larry Clark, J Russell Mason
Larry Clark
Passerine birds that reuse nest sites face an increased parasite and pathogen load. They also are more likely to use fresh green vegetation during nest construction. The present results demonstrate that at least one passerine, the European Starling: (a) selects a small subset of available plant species for inclusion in nest material; and (b) chooses plants whose volatiles are more likely to inhibit arthropod hatching and bacterial growth relative to a random subset of available vegetation. The results also show that preferred plants possess greater numbers of mono- and sesqueterpenes at higher concentrations relative to a random subset of available …
Unidirectional Reproductive Incompatibility Between Aedes (Protomacleaya) Brelandi And A. (P.) Hendersoni (Diptera: Culicidae)., David B. Taylor, George B. Craig
Unidirectional Reproductive Incompatibility Between Aedes (Protomacleaya) Brelandi And A. (P.) Hendersoni (Diptera: Culicidae)., David B. Taylor, George B. Craig
David B Taylor
Forced mating was used to determine reproductive compatibility between two species in the Triseriatus Group of Aedes (Protomacleaya). In the cross between A. hendersoni Cockerell females and A. brelandi Zavortink males, only 7% of the females laid eggs that developed embryos. Furthermore, <5% of the eggs from single-female clutches in which one or more eggs did embryonate were fertile. In the reciprocal cross, A. brelandi females crossed to A. hendersoni males, 70% of the females laid fertile eggs and >80% of the eggs from those females became embryonated. Approximately 80% of the females were inseminated in both of the reciprocal crosses, No chromosomal abnormalities were observed in the hybrids. Incompatibility between the A. brelandi male genome and the A. hendersoni female cytoplasm appeared to be the cause of the reduced fertility.