Humpback Whale Killed by Ship Ends Up at White's Point in San Pedro, California

www.SanPedroNews.Pilot.com

An adult Humpback whale was discovered washed ashore at White's Point in San Pedro, California on May 8, 2011.

The whale was not a whole humpback; the head and chest area, including the long pectoral fins were missing. It was as if about a third of the whale had been sliced cleanly off with a huge sharp blade. Like the propeller from a large ship.

The crushed ribs and mangled vertebral column clearly indicated that the whale had been hit at high speed by something large and blunt, most likely the bulbous bow of a large ship. Then it probably was sucked in by the propeller and the front third of the animal was sliced off.

The whale was still fairly fresh, Dave Janiger, curatorial assistant at the Natural History Museum of Los Angeles County estimated that it had been killed between three and five days ago. It didn't smell yet and the much of the skin was still in good condition. At least one of the barnacles attached to the whale's tail fluke was still alive. It was not difficult to identify it as a humpback whale; it had the very distinctive scalloped edges to the tails flukes, the knobby dorsal fin, black and white skin and thick throat grooves. The genital area was wedged between rocks, but the absence of mammary slits makes me tentatively sex it as a male. We will know for sure in a few weeks, when the lab results become available for the tissue samples that Janiger collected. That means he cut off small pieces of skin and blubber and some barnacles.

The humpback feeding grounds are transected by the shipping lanes that lead to the bustling Los Angeles/Long Beach port complex. The timing and distance are about right: the prevailing currents would carry a dead whale down the coast until it finally washes up days later and miles away. Efforts are underway to slow down the large cargo ships in the biologically sensitive Santa Barbara Channel, especially since at least four endangered blue whales were killed in the area in 2007. At this point speed restrictions are voluntary and ships are only advised to reduce their speed when blue whales are spotted in the shipping lanes.

While whales have excellent hearing and are usually acutely aware of everything in their environment, it is believed that the design of large cargo ships prevents the engine and propeller sound to propagate directly ahead of a moving vessel. Scientists like John Calambokidis of the Cascadia Research collective have been studying the whales' behavior around large ships and are making some worrisome discoveries. The large whales, who aren't really wired to fear much in the ocean, come to the surface when startled, which pits them right in the danger zone.

Nobody knows for sure how many whales are killed by ships each year. We only get to see the ones that stay attached to the ships that kill them and are brought into port or the ones that wash ashore, but there are likely many, many more that sink or drift out to sea and are never found.

So far there are no plans to dispose of the dead humpback at White's Point, it can be easily seen from the top of the bluff near the playground.

Тэги:

#Eric #Martin #Humpback #whale #white's #point #san #pedro

Скачать видео