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The reproductive success and biology of Africanized (A) and European (E) honeybees (Apis mellifera) were compared for a year (1984-86) over 3 life-zon...
Read moreThe following is based largely on the author's partly hypothetical interpretation of existing data on the zoonosis caused by Leishmania mexicana in Br...
Read moreenThis link goes to a English sectionesThis link goes to a Spanish section Yields of tropical tree crops decline with time, often forcing smallholders...
Read moreThe spatial distribution of two wild ungulates, impala (Aepyceros melampus) and kudu (Tragelaphus strepsiceros), and of domestic cattle, was monitored...
Read moreSecondary forests growing on cleared lands and tree plantations are becoming increasingly widespread land-uses in the tropics. Previous studies are di...
Read moreSemi-arid rangelands, comprising more than 40% of the Earth's land surface, provide critical ecosystem services. Worldwide, these ecosystems are exper...
Read moreExpanding irrigation development threatens the productive and diverse fisheries of rain-fed rice-farming landscapes. Environmental management of irrig...
Read moreYoung Golden Delicious trees were grown at Bristol for 1 year then, in January 1975, half the batch were moved to Montpellier; in January 1976, 6 tree...
Read moreAt 3 sites on the El Barta plains of northern Kenya, the ecological effects of controlling the dominant shrub Disperma sp. near D. eremophilum were st...
Read moreSeed of 4 ecotypes of Digitaria milanjiana with different dormancy characteristics related to climatic origin were exposed at the soil surface during ...
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