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  • A Houle
  • 1999
This paper evaluates whether 1) protoplatyrrhines could have migrated to South America via Antarctica, and 2) the floating island model is a plausible transoceanic mode of dispersal for land vertebrates like protoplatyrrhines. Results show that Eocene Antarctica and Australia supported large and dense forests, and that the Antarctic fauna was comprised of(More)
We tested the hypothesis that fruit quantity and quality vary vertically within trees. We quantified intratree fruit production before exploitation by frugivores at different heights in 89 trees from 17 species fed on by primates in Kibale National Park, Uganda. We also conducted a pilot study to determine if the nutritional value of fruit varied within(More)
1. We examined mechanisms of coexistence between two congeneric species of frugivorous primates, the blue monkey (Cercopithecus mitis) and the red-tailed monkey (C. ascanius). 2. We used giving-up densities (the amount of food which animals leave in a patch) in fruit trees to measure foraging efficiency and to evaluate possible mechanisms of coexistence.(More)
In the last few years, we saw the emergence of voice-over-IP (VoIP) protocols to enable low-cost telephony services. While VoIP providers are rapidly growing market share against public switched telephone network (PSTN), these technologies are lacking mobile support. We believe that mobile ad hoc networks (MANETs) may offer a good platform for the fast(More)
Every service outage in an optical telecommunication network causes significant revenue losses to major corporations relying on the network for business activities. Therefore, survivability must be a foremost consideration in the network provisioning to ensure that the network will be able to survive as many failures as possible. The cost of interconnection(More)
— Even if both traditional centralized and decentralized models can support small conferences, their deployment for large number of participants is less obvious. In fact, while server-based centralized conference facilitates control and administration operations, supporting centralized media processing in large scale conference causes system overhead on the(More)
Competing successfully for the best feeding sites is an important behavioral strategy but little is known about how feeding sites vary nutritionally within a fruit tree. To answer this question we tested how the nutritional value of a fruit is influenced by its ripeness and its height within the tree crown. A complementary objective was to assess the(More)
Even if both traditional centralized and decentralized models can support small conferences, their deployment for large number of participants is less obvious. In fact, while server-based centralized conference facilitates control and administration operations, supporting centralized media processing in large scale conference causes system overhead on the(More)
MANET networks are transitory, poorly regulated and essentially local in nature. Such environments have need for Information Assurance (IA) services, but the lack of regulation, the limited reach-back connectivity, and the ad hoc nature of the networks make supplying these services difficult. MANET IA services should supply subscriber confidentiality, data(More)