—We measured the initial mortality (fish judged nonreleasable at weigh-in), prerelease mortality (fish judged nonreleasable 1–2 h after weigh-in [which includes initial mortality]), and postrelease mortality (fish that died during a 5-d retention in net-pens) in 14 live-release tournaments for walleye Sander vitreus conducted in April–October 2006 and April–July 2007 in lakes and rivers in Mich...

We study competitions structured as hierarchically shaped single-elimination tournaments. define optimal tournaments by maximizing attractiveness such that the topmost players will have chance to meet in higher stages of tournament. propose a dynamic programming algorithm for computing and we provide its sound complexity analysis. Based on idea approach, also develop more efficient deterministi...

We describe sufficient conditions for the existence of Hamiltonian paths in oriented graphs and use these to provide a complete description of the tournaments with no two edge-disjoint Hamiltonian paths. We prove that tournaments with small irregularity have many edge-disjoint Hamiltonian cycles in support of Kelly's conjecture.