Blue whales are filter feeders; their diet consists almost exclusively of euphausiids (krill).
They are generally solitary or gather in small groups and have no well-defined social structure other than mother-calf bonds. The fundamental frequency for blue whale vocalizations ranges from 8 to 25 Hz and the production of vocalizations may vary by region, season, behavior, and time of day.
The blue whale was once abundant in nearly all the Earth's oceans until the end of the 19th century. It was hunted almost to the point of extinction by whalers until the International Whaling Commission banned all blue whale hunting in 1966. The International Union for Conservation of Nature has listed blue whales as endangered as of 2018. It continues to face numerous threats, both man-made (ship strikes, pollution, ocean noise and climate change), and natural (killer whale predation).
The average length of sexually mature female blue whales is 72.1 ft for Eastern North Pacific blue whales, 79 ft for central and western North Pacific blue whales, 68–78 ft for North Atlantic blue whales, 83.4–86.3 ft for Antarctic blue whales, 77.1 ft for Chilean blue whales, and 69.9 ft for pygmy blue whales.
In the Northern Hemisphere, males weigh an average 220,000 lbs and females 247,000 lbs. Eastern North Pacific blue whale males average 195,000 lbs and females 220,000 lbs. Antarctic males average 247,000 lbs and females 290,000 lbs. Pygmy blue whale males average 184,000 lbs to 218,000 lbs. The weight measured of the heart from a stranded North Atlantic blue whale was 438 lbs, the largest known in any animal.
A blue whale's age is most reliably measured using ear plugs. Blue whales secrete earwax (cerumen) throughout their lives, forming long, multilayered plugs. Each deposited light and dark layer (lamina) indicates a switch between fasting during migration and feeding. As one set is laid down per year, the number of layers is an indicator of age. The maximum age of a pygmy blue whale determined this way is 73 years. Before the ear plug aging method, layers in baleen plates were used; however, these wear down and are not as reliable. The blue whale's ovaries form a permanent record of the number of ovulations (or perhaps pregnancies), in the form of corpora albicantia—fibrous masses that are permanent scars and were once used as an indication of age. In a female pygmy blue whale, one corpus albicans is formed on average every 2.6 years.
The blue whale's diet consists almost exclusively of euphausiids (krill). An adult blue whale can eat up to 40 million krill in a day.
Blue whales have been observed near Magdalena Bay (along the western coast of Baja California, Mexico) feeding on pelagic red crabs. However, recent observations or fecal samples have not confirmed this. Other accidental or opportunistic consumption of copepods and amphipods have been documented. Blue whales feed on krill at the surface and depths greater than 328 ft, following their prey's 24 hour vertical migration through the water column.
A blue whale's heart is so big you could swim through it's arteries! A blue whale's heart is as big as a car.
If you want to read a lot more, go, https://en.wikipedia.org/wiki/Blue_whale
Bell peppers take center-stage in our healthier-for-you Italian Stuffed Bell Peppers. Each bell pepper is stuffed with just the right amount of cheesy goodness and Italian seasoning to leave you feeling down-right satisfied.
- 1 cup cooked whole grain rice
- 1/4 cup finely chopped onion
- 1 cup shredded mozzarella cheese, divided
- 1 (8-ounce) can tomato sauce
- 3 cloves garlic, chopped
- 1 teaspoon Italian seasoning
- 1 tablespoon grated Parmesan cheese
- 2 tablespoons chopped fresh parsley
- 1/4 teaspoon black pepper
- 4 green bell peppers
- 1/4 cup water
- Preheat oven to 375º.
- In a large bowl, combine rice, onion, 1/2 cup mozzarella cheese, tomato sauce, garlic, Italian seasoning, Parmesan cheese, parsley, and black pepper; mix well.
- Cut off bell pepper tops and remove seeds. Evenly spoon rice mixture into each bell pepper and place in an 8- x 8-inch square baking dish. Add water to baking dish and cover.
- Bake 25 minutes, uncover, sprinkle with remaining mozzarella cheese, and bake 8 to 10 more minutes, or until peppers are fork-tender.
1890 – Agatha Christie, English writer (d. 1976)
1922 – Jackie Cooper, American actor and director (d. 2011)
1940 – Merlin Olsen, American football player and actor (d. 2010)