Morgan, Nicole B; Baco, Amy R (2019): Observation of a high abundance aggregation of the deep-sea urchin Chaetodiadema pallidum A. Agassiz and H.L. Clark, 1907 on the Northwestern Hawaiian Island Mokumanamana [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.903580, Supplement to: Morgan, NB; Baco, AR (2019): Observation of a high abundance aggregation of the deep-sea urchin Chaetodiadema pallidum A. Agassiz and H.L. Clark, 1907 on the Northwestern Hawaiian Island Mokumanamana. Deep Sea Research Part I: Oceanographic Research Papers, https://doi.org/10.1016/j.dsr.2019.06.013
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Published: 2019-07-05 • DOI registered: 2019-08-03
Abstract:
AUV images of deep-sea megafauna on the seamount Mokumanamana in the Northwestern Hawaiian Islands revealed a large aggregation of the diadematoid urchin Chaetodiadema pallidum. This species had not been previously recorded on this seamount, but was known from other locations in the Hawaiian Archipelago. A total of 11,360 individuals were counted by eye from 1,369 seafloor images along the 200, 250, and 300 m depth contours on the west side of Mokumanamana. To estimate the full population size, Inverse Distance Weighting and Empirical Bayesian Kriging interpolation calculated a total population size of between 139,552 and 144,063 individuals. These estimates are 1-2 orders of magnitude greater than any previous estimates of urchin aggregation abundances. Little biological data exists for this species; thus, it is difficult to know if this is a spawning aggregation, a feeding front, a type of "schooling" behavior, or some combination thereof, but a food source did seem to be present in the form of mesophotic green algal detritus.
Coverage:
Median Latitude: 23.559892 * Median Longitude: -164.868427 * South-bound Latitude: 23.550427 * West-bound Longitude: -164.873487 * North-bound Latitude: 23.573514 * East-bound Longitude: -164.863827
Date/Time Start: 2015-11-03T01:40:05 * Date/Time End: 2015-11-03T05:11:45
Minimum DEPTH, water: 177.348 m * Maximum DEPTH, water: 285.723 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Morgan, Nicole B | Geocode | ||
| 2 | Transect | Transect | Morgan, Nicole B | |||
| 3 | File name | File name | Morgan, Nicole B | |||
| 4 | Uniform resource locator/link to image | URL image | Morgan, Nicole B | |||
| 5 | LATITUDE | Latitude | Morgan, Nicole B | Geocode | ||
| 6 | LONGITUDE | Longitude | Morgan, Nicole B | Geocode | ||
| 7 | DEPTH, water | Depth water | m | Morgan, Nicole B | Geocode | |
| 8 | Height above sea floor/altitude | Height above sea floor | m | Morgan, Nicole B | ||
| 9 | Oxygen | O2 | µmol/l | Morgan, Nicole B | ||
| 10 | Temperature, water | Temp | °C | Morgan, Nicole B | ||
| 11 | Conductivity | Cond | mS/cm | Morgan, Nicole B | ||
| 12 | Species | Species | Morgan, Nicole B | |||
| 13 | Number of individuals | Ind No | # | Morgan, Nicole B | ||
| 14 | Chaetodiadema pallidum | C. pallidum | #/m2 | Morgan, Nicole B |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
14930 data points
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