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A growing body of evidence has begun to reveal flaws in the traditional assumption of female passivity and lack of discrimination after copulation has begun. William Eberhard has compiled an impressive array of research on the ability of females to shape the outcome of mating. He describes studies of many different cryptic mechanisms by which a female can accept a male for copulation but nevertheless reject him as a father. Evidence from various fields indicates that such selectivity by females may be the norm rather than the exception. Because most post-copulatory competition between males for paternity is played out within the bodies of females, female behavior, morphology, and physiology ...
In this lavishly illustrated, first-ever book on how spider webs are built, function, and evolved, William Eberhard provides a comprehensive overview of spider functional morphology and behavior related to web building, and of the surprising physical agility and mental abilities of orb weavers. For instance, one spider spins more than three precisely spaced, morphologically complex spiral attachments per second for up to fifteen minutes at a time. Spiders even adjust the mechanical properties of their famously strong silken lines to different parts of their webs and different environments, and make dramatic modifications in orb designs to adapt to available spaces. This extensive adaptive fl...
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Englishman William Edward Parry's journal of his voyage for the discovery of a North-west passage through the Canadian Arctic in the years 1819-'20 aboard the ships Hecla and Griper. Includes official instructions to Parry from the British government on undertaking the expedition, details of land and sea exploration, encounters with Inuit (Eskimos) and fauna in the region, lists of supplies, chronometric, magnetic and lunar observations, numerous plates and maps, glossary of technical terms.