Weeks 4 and 5

Here are some things I learned in weeks 4 and 5:

– Which of the following types of drag have a significant effect on large marine megafauna species? Pressure and wave drag.
– “Pinnipeds are efficient swimmers because they use pelvic or pectoral oscillation for propulsion instead of pelvic paddling or rowing.” True.
– “Temperature is an important factor for marine Megafauna species because seawater conducts heat away from their bodies much more efficiently.” True.
– Which of the following is an anatomical adaptation that marine homeotherms use to control heat flow into and out of their bodies? Counter current heat exchangers..
– In terms of osmoregulation, most marine Megafauna species are: hypoosmotic.
– “Most marine mammals do not drink large amounts of seawater.” True.
– Sessile animals incur handling time when foraging despite that fact that they don’t pursue prey items. True.
– All foods produce the same amount of metabolizable energy. False.
– During digestion, some proportion of ingested energy an animal gains is lost to what? Egestion.
– How much energy is typically transferred to the next trophic level to build new biomass? 10%
– A marine mammal’s fecal matter tends to disperse in surface waters as opposed to sinking rapidly to deep waters. True.
– In what seasons would cetaceans play a larger role in the nitrogen cycle in the Gulf of Maine? Spring and Summer.

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