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- 2Energy budgets
- 1Boreal forest (Yukon, Canada)
- 1Field metabolic rate
- 1Filter feeding
Sponges (Porifera) are abundant in most marine and freshwater ecosystems, and as suspension feeders they play a crucial role in filtering the water column. Their active pumping enables them to filter up to 900 times their body volume of water per hour, recycling nutrients and coupling the benthic...
Food availability, energetic ceilings, and life-history trade-offs have been proposed as potential determinants of offspring number in many animals. We investigated the role of these factors in determining litter size in a free-ranging population of red squirrels (Tamiasciurus hudsonicus)....