Manatee Migration Update: March 1, 2000
New Manatees in the 'Hood: Comet and Xoshi Released!
"Comet and Xoshi were successfully tagged and released at Blue Spring State Park, and Brian and Calista are scheduled for release there today! "Comet's release on 16 February went beautifully! Comet was active, and was interacting with other manatees, including Peaches, who, you may remember, is the calf of Georgia, a previous captive-release. Within a short time, Comet was exploring the spring run, which is just what we hoped for! We want him to become familiar with this habitat. We are encouraged that he has been socializing with other manatees--that's a very good sign. "He spent Sat. 2/19 and Sun. 2/20 at Lake Beresford, just north of Blue Spring. By Mon. 2/21 a.m. he'd come back to Blue Spring. It's great that he goes out exploring, then finds his way back! That same day he was swimming up and down the run with "Mossback" another young male, about his same size/age. "Lately, he's become a little wiley. We've had lots of tips on his tag, looks like he's been moving around quite a bit. Late on 2/24 and early 2/25 he plotted in the south side of Lake Monroe. Susan went there on 2/25 trying to get a visual on him. As of 2/27, Comet was still in Lake Monroe--Jim saw him on Sunday, feeding on freshwater vegetation (Vallisneria sp.) with another manatee!
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"Xoshi swam into the river, just opposite the mouth of the run. The weather has warmed and the river temperatures (69 degrees F on 2/22 a.m.) are nearly the same as Blue Spring Run (72 degrees F). The morning after her release, 2/23, she was plotting a bit north of the run, in the river, but it is not a high quality location. By 2/25, she was still out exploring the river, near Blue Spring.
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Cathy Beck Driven by Degrees: Discussion of CQ #3 In Challenge Question #3, we asked you "Where is Ivan and what is he doing?" Thanks to Mrs. Jones' Sixth Grade students in Ohio, who zeroed in on Ivan's location: "Ivan is now near or in the Homosassa River. He is probably eating plants, because that is what they do during the day." John, Grant, Jefferey, and Dan at Canton Country Day School, Canton, OH (pjones@ccd-school.org) And thanks to New Jersey Seventh Grader, Jana, who said that "I think that Ivan is by the coast of Florida." Iselin Middle School in Iselin, NJ (JNMARIEC@aol.com) Biologist Cathy Beck revealed the key details to answer this question about WHERE Ivan was and WHY he was there:
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to this question, please follow the instructions below.) Human Home Range To put the manatees' travels in perspective, compare them to your own travels. In the past 3 weeks, what is the greatest distance between two places you have visited? Calculate the furthest distance between points within your winter range, then answer this question:
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to this question, please follow the instructions below.) Ranger Wayne's Roll Call
Do the same conditions continue to affect the number of manatees in the run? Also, with warming spring temperatures on the way, when do you predict the winter manatee season at Blue Spring will end?"
*(All temperatures are in degrees Celcius; "nt" = temperature not taken )
Cold Weather Equals Fewer Boaters: Discussion of CQ #4
Ranger Wayne explained that the answer may lie in the fact that some humans don't like cold weather either: "We've had a good bit of cold or at least cool weather to keep down the boat
traffic." Temperature Trends: Discussion of CQ #5 In CQ #5, hardworking Ohio Sixth Grade students explained what they discovered in Ranger Wayne's data: "The pattern that we saw was that the lower the temperature the more manatees would come into the run. The day that it was coldest was December 29. On that day, the air temperature low was 5 degrees Celcius and the high was 21 degrees Celcius. On that day there were the most manatees at 103. This was the highest number of manatees in the table. This was the coldest day and when the temperature was dropping, more manatees were there." Mitchell, Corey and David, Mrs. Jones' 6th grade students Canton Country Day School in Canton, OH (pjones@ccd-school.org) Ranger Wayne explains this in a little more detail:
Thanks to all of the students who submitted their "cool" answers--nice job!
Last Call for Your Best Questions! Meet Manatee Expert Nancy Sadusky of Save the Manatee Club. She's ready to answer your best questions. But hurry, the deadline is this Friday, March 3.
How to Respond to Today's Challenge Questions Please answer ONLY ONE question in each e-mail message!: 1. Address an E-mail message to: jn-challenge-manatee@learner.org 2. IMPORTANT: In the Subject Line of your message write: Challenge Question #6 (OR #7 OR #8 OR #9) 3. In the body of the EACH message, give your answer to ONE of the questions above. The Next Manatee Migration Update will Be Posted on March 15, 2000 Copyright 2000 Journey North. All Rights Reserved. Please send all questions, comments, and suggestions to our feedback form
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