MIRC Vessel Winter Surveys 2011
HDR Environmental, Operations and Construction, Inc.

Dataset credit

The U.S. Navy Marine Species Monitoring Program


Primary contact Dana Spontak HDR Environmental, Operations and Construction, Inc.
Secondary contact Todd Mcconchie HDR Environmental, Operations and Construction, Inc.
Data entry Ei Fujioka Duke University



The objective of this current survey effort was to conduct baseline surveys to further document
marine mammal and sea turtle occurrence in nearshore waters around the island of Guam. This
report presents the results of the Guam Marine Species Monitoring Survey conducted on the MV
Island Girl from February 17 to March 3, 2011. This survey covered an area of approximately
4,100 square kilometers (km2)(1,200 square nautical miles ([nm2]) to document marine mammal
and sea turtle distribution around the island of Guam. The approach primarily followed
opportunistic survey protocols used in a recent survey around Guam (Ligon et al. 2011), which
remained nearshore (within 5.6 kilometers [km] or 3 nautical miles [nm] of the coastline). ). The
resulting sightings, therefore, consisted of spinner dolphins (Stenella longirostris; 7 of 9
sightings) and a mixed group of bottlenose dolphins (Tursiops truncatus) and short-finned pilot
whales (Globicephala macrorhynchus). In addition, one species of sea turtle was observed (green
sea turtle, Chelonia mydas). Additional lines of effort following standard line-transect protocols
were attempted (out to 10 nm from shore) when sea conditions permitted.


not provided

Supplemental information

The sighting of short-finned pilot whales and bottlenose dolphins on 02/22/11 was an aggregation of the two species and recorded as a single record. This sighting was split into each species in this dataset.




Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downlodable online. Other attributes may be obtained upon provider's permission unless otherwise noted below.

This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes in dataset provided

Attribute (table column)Description
oiddefinition not provided
sighting_idSighting ID
obs_dateDate of the sighting (local time zone)
obs_timeTime of the sighting (local time zone)
sp_obsSpecies name recorded
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
obs_countbest estimate of number of animals
grp_highHigh estimate of number of animals
grp_lowLow estimate of number of animals
calvesNumber of calves
beaufortBeaufort Sea State (not recorded in this dataset)
bearingBearing (°)
bottom_depthBottom Depth (m)
behaviorBehavioral summary
geomdefinition not provided
Marine mammals10
Sea turtles6
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2011-01-03
Date, End2011-03-03
Temporal prec.111111
Latitude13.38 - 13.57
Longitude144.64 - 144.80
Coord. prec.3 decimal digits
Data typeAnimal sighting
Contr. throughNavy
Sharing policy CC-BY (All)
Also availalbe from iOBIS
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics