Difference between revisions of "Turtle Sense / 2015 Season Results"
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! style="text-align:left;" class="unsortable"|Notes; | ! style="text-align:left;" class="unsortable"|Notes; | ||
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− | |[[File:2015 - NH007R after emergence.png|250px]]||NH007R||AA0009||---||---|| | + | |[[File:2015 - NH007R after emergence.png|250px]]||NH007R||AA0009||---||---||51|| There was too much noise in this nest to be able to make any predictions. This was a very early nest -- day 51. No obvious explanation for all the noise. The sensor had moved from its installation position in the nest. Might be a faulty sensor. |
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|[[File:2015 - AA0005 after emergence (7-22).png|250px]]||NH002||AA0005||48 (56) revised next day ||52 (60)||52 (60)||(''Note, the days listed in the x-axis of this chart is off by 8 days. Add 8 to the numbers you see.'') Emergence was predicted for Tuesday evening, July 21st. Turtle patrol reported 1 hatching track and a depression on 07/22. (More might have come out, there was a severe rain storm the previous night.) | |[[File:2015 - AA0005 after emergence (7-22).png|250px]]||NH002||AA0005||48 (56) revised next day ||52 (60)||52 (60)||(''Note, the days listed in the x-axis of this chart is off by 8 days. Add 8 to the numbers you see.'') Emergence was predicted for Tuesday evening, July 21st. Turtle patrol reported 1 hatching track and a depression on 07/22. (More might have come out, there was a severe rain storm the previous night.) | ||
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|[[File:2015 - NH023 (8-11) sensor AA0017.png|250px]]||NH023||AA0017|| 53 ||58 || 57 || The morning of 8/7 a hatchling was found wandering near the dunes. Rain washed out the tracks so it is not certain how many emerged the evening of 8/6. There was a record of 9 hatchlings on the 9th and 5 on the 10th. A total of 85 eggshells were counted. It seems likely that most of the hatchlings left on Thursday evening (8/6). | |[[File:2015 - NH023 (8-11) sensor AA0017.png|250px]]||NH023||AA0017|| 53 ||58 || 57 || The morning of 8/7 a hatchling was found wandering near the dunes. Rain washed out the tracks so it is not certain how many emerged the evening of 8/6. There was a record of 9 hatchlings on the 9th and 5 on the 10th. A total of 85 eggshells were counted. It seems likely that most of the hatchlings left on Thursday evening (8/6). | ||
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− | ||[[File:2015 - NH024 (8-10) sensor AA0025.png|250px]]||NH024||AA0025|| || | + | ||[[File:2015 - NH024 (8-10) sensor AA0025.png|250px]]||NH024||AA0025|| 50 || 55 || 56 || More than 20 tracks were counted the morning of the 8th. On 8/9 the activity recorded was from the nest being washed out. Very few hatched or unhatched were found after the washout, so it is unclear exactly what happened. |
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|[[File:2015 - NH013 (8-12) sensor AA0010.png|250px]]||NH013||AA0010|| --- || --- || --- || This nest was thought to be infertile, and it was. Excavated on Aug 12 | |[[File:2015 - NH013 (8-12) sensor AA0010.png|250px]]||NH013||AA0010|| --- || --- || --- || This nest was thought to be infertile, and it was. Excavated on Aug 12 | ||
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− | |[[File:2015 - NH036 (8-13) sensor AA0024.png|250px]]||NH036||AA0024|| || | + | |[[File:2015 - NH036 (8-13) sensor AA0024.png|250px]]||NH036||AA0024||53 || 57 || 58|| 20+ tracks noticed by Turtle Patrol on 8/13. Only about 1/4 of the eggs hatched. |
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− | |[[File:2015 - NH055R (8-16) sensor AA0026.png|250px]]||NH055R||AA0026|| --- || --- || | + | |[[File:2015 - NH055R (8-16) sensor AA0026.png|250px]]||NH055R||AA0026|| --- || --- || 50|| Only 7 of 129 eggs were viable. No hatching activity noticed in data. |
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− | |[[File:2015 - NH041 (8-16) sensor AA0020.png|250px]]||NH041||AA0020|| || | + | |[[File:2015 - NH041 (8-16) sensor AA0020.png|250px]]||NH041||AA0020|| 52|| 56 or 57 || 59|| Unusually long period of hatching activity. Nest boiled at 10:48 PM on Aug 15th. |
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− | |[[File:2015 - NH056 (8-17) sensor AA0027.png|250px]]||NH056||AA0027|| || | + | |[[File:2015 - NH056 (8-17) sensor AA0027.png|250px]]||NH056||AA0027||50 || 54 || 55 || 132 turtles hatched. 8 eggs didn't make it. |
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− | |[[File:2015 - NH058 (8-17) sensor AA0028.png|250px]]||NH058||AA0028|| || | + | |[[File:2015 - NH058 (8-17) sensor AA0028.png|250px]]||NH058||AA0028||51 || 55 || 55 || The graph is from August 17th (day 53). data quieted on Tuesday the 18th. There were still 28 hatchlings in the nest when excavated on the 21st. |
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Revision as of 04:36, 23 January 2016
We monitored nests at the Cape Hatteras National Seashore during 2015. For detailed day-by-day records of our predictions, please go to our Google Group
Prediction methodology
Data was uploaded to our server every 4 hours after 40 days of incubation. An automated process creates graphs of the data. Predictions were made by Samuel Wantman by manually looking at those graphs. The data was typically interpreted only once a day, at the end of the day (around Midnight PST or 3AM local time). If frequent wide fluctuations in the data had been observed for the preceding day (usually following a large dip in the data), nestlings were predicted to emerge 5 days after the start of the activity. This was typically 4 days after the observation. Sometimes a day of looking at the data was missed so a prediction might only be for 3 days after. If 60 days went by without any signs of hatching activity a prediction was made that the nest would be unproductive.
Graphs of monitored nests
Note: The x-axis is the number of days since the nest was discovered. This number is likely off by a few hours. Nests are discovered during turtle patrol and a sensor is installed in the nest at that time and registered in the database. Since the nest was laid sometime during the previous night, the exact incubation time might be off. Similarly, the date that emergence was first observed is often the morning after when the turtle patrol notes tracks in the sand. Both of these errors tend to cancel each other out. Note that NH002 is off by 8 days because it was not registered until 8 days after the nest was discovered.