Difference between revisions of "Turtle Sense / 2015 Season Results"
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|[[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. | |[[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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+ | |[[File:2015 - NH074 sensor AA0029.png|250px]]||NH074||AA0029||48|| 52 || 55 || 7 predated eggs may have caused premature prediction. | ||
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+ | |[[File:2015 - NH078 sensor AA0014.png|250px]]||NH078||AA0014||50 || 54 or 55 || 59 || 75 hatchlings rescued from compacted sand and overwashes. High tides were approaching and data showed that the hatchlings emergence was delayed. Hatchlings likely would have died from the high tides. 20 unhatched eggs were reburied but non hatched. All were leucystic. | ||
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+ | |[[File:2015 - NH085 sensor AA0008.png|250px]]||NH085||AA0008||52 || 56 || 58 || hard crust may have delayed emergence. | ||
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+ | |[[File:2015 - NH094 sensor AA0015.png|250px]]||NH094||AA0015||51 || 55 || 56 || Patrol examined the nest on day 52 after 14 overwashes and confirmed there was a live hatchling. | ||
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+ | |[[File:2015 - NH105 sensor AA0018.png|250px]]||NH105||AA0018||--- || --- || --- || lots of overwashes seen in data. No prediction made. No live hatchlings. | ||
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+ | |[[File:2015 - NH134R sensor AA0019.png|250px]]||NH135R||AA0019||58 || 61 or later || 65 || roughly half hatched and emerged. Later nests seem to emerge longer than 5 days after hatching activity noticed in data. | ||
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+ | |[[File:2015 - NH138 sensor AA0009.png|250px]]||NH138||AA0009||54 || 58 or later || 61 || Excavated on day 61 due to overwash. Earlier traces of emergence may not have been seen. | ||
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+ | |[[File:2015 - NH139R sensor AA0005.png|250px]]||NH139R||AA0005||54 || 58 or later || 59 || | ||
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+ | |[[File:2015 - NH142R sensor AA0021.png|250px]]||NH142R||AA0021||53 || 56 or later || 57? || Signs of emergence obliterated by high tides. Nest check on day 57 revealed hatchlings. 6 hatchlings remained when excavated on day 59. | ||
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+ | |[[File:2015 - NH143R sensor AA0006.png|250px]]||NH143R||AA0006||--- || --- || 57? || Unit stopped reporting on day 45. No prediction made. | ||
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+ | |[[File:2015 - NH151R sensor AA0007.png|250px]]||NH056||AA0027||--- || --- || --- || No predictions. Only 2 live hatchlings (one emerged). Major disturbances to nest from Hurricane Joaquin. | ||
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+ | |[[File:2015 - NH157 sensor AA0013.png|250px]]||NH157||AA0013||--- || --- || --- || Nest and equipment completely washed away by severe weather. Heavy erosion and scarping. | ||
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+ | |[[File:2015 - NH158R sensor AA0011.png|250px]]||NH158R||AA0011||--- || --- || --- || No predictions. Nest excavated due to severe sand accumulation and compaction. No eggs hatched. | ||
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+ | |[[File:2015 - NH161R sensor AA0029.png|250px]]||NH161R||AA0029||--- || --- || --- || Nest and equipment completely washed away by severe weather. | ||
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Revision as of 05:35, 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.