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| Questions From The Dvd Documentary | |
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| Tweet Topic Started: Aug 14 2006, 06:28 PM (241 Views) | |
| MaMiMoBa Mom | Aug 14 2006, 06:28 PM Post #1 |
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Advanced Member
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I have many, so, here goes... In the video you weighed an egg at 37.93. Is that considered a healthy weight? Heavy or light in relation to average? When do unhatched eggs begin to make peeping sounds from within their shell? John Beard stated that from 5 nests there were 9 fertile eggs. Then it was mentioned that out of 6 eggs, 3 survived. Confused with those numbers, but anyway, of the eggs that did not survive, were those shells sent to a lab for further investigation to see if the chemicals were to blame (ie. thin-shelled)? J. Beard noted that there were 3 eaglets to return to nests, plus the one brought down from San Francisco. There were 5 nests? What happened with the eagles at the fifth nest? Were the fake eggs just removed? When Dr. Sharpe flew via helicopter to the rocky pinnacle to release a bald eagle chick, when he returned to tag the eaglet he did not appear to have reached that location the same way. Was that the same location or a different one AND was that the location where the beautiful photo was taken of you next to the nest with the chick and the parents flying above? Regarding contaminant levels, over the few decades that they were dumped, what is the estimation of how much? How has that affected humans living in that area? I'm thinking of swimming in the waters, eating fish, etc... Just wondering. Why didn't you use fake eggs at A-49's nest and incubate her? And lastly, based on Cruz's parents being successful this past season, I'm assuming you will continue to watch them reproduce and nurture their young in the wild. If you would sense a problem with them in the future, would you still intervene to save the chick?
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| ostrich2 | Aug 14 2006, 06:56 PM Post #2 |
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Advanced Member
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I can try to help answer this one - Dr. Sharpe mentioned talked about this briefly in an earlier thread. At this point they are attempting to find out whether the contaminant levels on Santa Cruz have dropped to the point where the eagles are capable of successfully breeding without human intervention. So for the next couple of years all the eagles on the island will be allowed to lay their eggs and either succeed or fail on their own. Then I think they will reassess based on the results. A49 is a good successful start - we can all hope this success continues. Correct me if I got any of that wrong Dr. Sharpe
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| Eagle Guy | Aug 14 2006, 08:31 PM Post #3 |
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Advanced Member
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Ostrich2 was correct regarding letting the nests go on Santa Cruz. If all the eggs begin breaking, then we will have to reassess the program. Now MaMiMoBa Mom's questions. Q: In the video you weighed an egg at 37.93. Is that considered a healthy weight? Heavy or light in relation to average? A: I think that was probably the breadth of the egg in millimeters. Healthy eggs are anywhere from 90-140 grams or so. Q: When do unhatched eggs begin to make peeping sounds from within their shell? A: They start to peep once they break into the air cell and begin breathing air, usually about a day before they start pipping out of the egg (a 1-2 day process). Q: John Beard stated that from 5 nests there were 9 fertile eggs. Then it was mentioned that out of 6 eggs, 3 survived. Confused with those numbers, but anyway, of the eggs that did not survive, were those shells sent to a lab for further investigation to see if the chemicals were to blame (ie. thin-shelled)? A: There were 5 nests and 9 fertile eggs. The first 6 eggs died and the last 3 hatched. The eggs were sent off for analyses, but I don't know if we have received those back yet. Q: J. Beard noted that there were 3 eaglets to return to nests, plus the one brought down from San Francisco. There were 5 nests? What happened with the eagles at the fifth nest? Were the fake eggs just removed? A: A second chick was brought down from the Zoo for the fifth nest. Q: When Dr. Sharpe flew via helicopter to the rocky pinnacle to release a bald eagle chick, when he returned to tag the eaglet he did not appear to have reached that location the same way. Was that the same location or a different one AND was that the location where the beautiful photo was taken of you next to the nest with the chick and the parents flying above? A: It was a different location and it was the one in the photo with the chick and parent flying overhead. I do hike to the helicopter nest to band the chick and it is not a fun hike/climb. Q: Regarding contaminant levels, over the few decades that they were dumped, what is the estimation of how much? How has that affected humans living in that area? I'm thinking of swimming in the waters, eating fish, etc... Just wondering. A: It is estimated that about 2500 tons of DDT were dumped into the ocean off of Palos Verdes Peninsula in southern California from 1947-1971. It is not clear on how that has affected humans. It is fine to swim in the ocean because the DDT is primarily in the sediment and in marine organisms. It is suggested that you limit the ingestion of many fish species, especially white croaker. I think the Montrose website may have more on the fish that should be avoided. |
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6:29 AM Jul 11