A considerable number of littoral and shallow water marine molluscs from the West Indian region and other areas reached Europe during the second half of the eighteenth and first half of the nineteenth century. These were, in many cases, brought by travelers and navigators and later described by European naturalists. Outstanding among these were Jean B. Lamarck, Carl von Linnaeus, J. F. Gmelin and Alcide d'Orbigny. Although they reported many species from the Lesser Antilles, very few are recorded from Barbados. [...]

To discuss land use is to discuss a matter of major geographic interest, and to outline methods of recording and explaining land use is to outline practically the whole range of a geographer's methods and techniques of regional analysis and synthesis. Even though there is a considerable diversity in the scope of land use studies, many are but regional studies emphasizing agriculture (e.g. C. C. Zimmerman, 1937). [...]

No description available.

No description available.

Two populations of Barbados Zenaida dove (Zenaida aurita) have in previous work been found to use two radically different modes of feeding competition. The St. James (StJ) population is territorial; it competes aggressively with conspecifics but scramble competes with heterospecifics. The Deep Water Harbour (DWH) population forages nonaggressively in large homospecfic flocks. Earlier studies linking these social differences with differences in individual and social learning suggest that Z. aurita is ideal for testing predictions from Brown's (1964) theory of economic defendability. Firstly, the hypothesis that resource defence will increase as the spatial clumping and temporal predictability of a resource increases was tested at 6 sites at DWH with a randomized complete block design. Secondly, spatial distribution of food was manipulated at both DWH and StJ in an attempt to alter the mode of foraging competition at DWH from scramble to interference, and to elicit group-feeding in the otherwise territorial StJ doves. As predicted, rates of aggression per intruder were highest for those sites at DWH receiving a spatially clumped and temporally predictable food source. Unlike those at DWH, doves from StJ did not modify their mode of foraging competition in response to variations in spatial distribution, but rather as a consequence of increased resource density. Interference competition appears to be the default strategy for Zenaida doves, with birds switching to scramble competition when a threshold of resource density is reached, only to revert back to aggressive defence when the spatial clumping and temporal predictability of food increases.

No description available.

No description available.

No description available.

No description available.

No description available.