Sockeye salmon subordinate males. Aggressive interactions between females only last one or two charges and/or chases. The intruder retreats and the spawning female settles back in her redd. These acts of aggression are important in terms of reproductive success, because they determine the quality of the nest site the female obtains and access to males. Competition for food or space while the salmon are in their lake residence period can exist. This happens when there is a more populous class of young sockeye or when there are multiple classes present. It can also happen when resources are in short supply. Interspecific competition
What Makes a Battle What Makes a Battle What Makes a Battle was a propaganda short produced by the US Army Pictoral Service in 1944. It documents the taking of the Marshall Islands while also encouraging increased war production. The film opens with the narrator asking "What makes a battle?" while the camera is focusing on shipments of industrial transports, "This is what it takes to make a battle." This statement sets up the dual nature of the entire film. War supplies are pouring in from every part of the country, from every type of American "Republican and Democrat, white and colored." Industrial production