Sea Sense satellite tracked green sea turtles from Tanzania 2012 under SWIOFP
Sea Sense
Dataset credit
Sea Sense Institut Français pour L'Exploitation de la Mer Kélonia
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Contacts
Role | Name | Organization | |
Primary contact |
Lindsey West |
Sea Sense |
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Secondary contact |
Mayeul Dalleau |
CEDTM |
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Secondary contact |
Jérôme Bourjea |
IFREMER |
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Data entry |
Ei Fujioka |
Duke University |
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Citation
West, L., M. Dalleau and J. Bourjea. 2014. Sea Sense satellite tracked green sea turtles from Tanzania 2012 under SWIOFP. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/1122) on yyyy-mm-dd. Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography. 22(2):104-115.
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Abstract
Satellite tags were deployed on three nesting green turtles (Chelonia mydas) between March and July 2012 to address data gaps concerning the spatial dynamics of green turtle nesting populations in Tanzania. Tags were deployed in Temeke District which supports one of the largest green turtle rookeries in Tanzania.
Tag durations ranged from 24 to 36 days. All three individuals went on to lay further clutches of eggs after tag deployment which provided valuable data on inter-nesting behaviour. Two individuals spent their inter-nesting periods at the same location, 30km south of the nesting grounds.
Two of the tags failed before post-nesting migrations commenced. One of the turtles was tracked during a post nesting migration to a foraging ground on the north-west coast of Pemba Island (Tanzania).
This was the first sea turtle satellite telemetry project ever to be carried out in Tanzania and has confirmed the location of an important foraging ground in Pemba Island and a site utilised by gravid females during inter-nesting periods.
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Purpose
The purpose of the satellite tracking project under SWIOFP was to facilitate the development of effective and sustainable management recommendations for protecting sea turtles at foraging and nesting sites and during migratory periods.
In Tanzania specifically, little is understood about the spatial dynamics of sea turtles which periodically move hundreds of kilometres between feeding grounds and nesting sites. There is a paucity of data concerning the location of important foraging habitats and migratory corridors and the true extent of fisheries interactions during various stages of the turtle life cycle. Lack of basic data is proving to be a major obstacle to the development and implementation of specific conservation and management actions in the wider western Indian Ocean region.
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Supplemental information
N/A
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References
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Attributes
Overview
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 described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".
Attributes in dataset
Attribute (table column) | Description |
oid | Unique ID number (generated by OBIS-SEAMAP) |
latitude | Latitude in decimal degrees |
longitude | Longitude in decimal degrees |
tag_id | Tag ID |
obs_datetime | Date and time of observation in local time calculated by OBIS-SEAMAP |
datetime_utc | Date and time of observation in UTC |
lc | Location class |
time_zone | Time zone of the datetime_utc values (always UTC) |
obs_count | Number of animals (always 1) |
age_class | Age (always Adult) |
sp_tsn | Taxonomic Serial Number added by OBIS-SEAMAP |
sp_obs | Species name recorded |
provider | Data provider |
owner | Data owner |
tagging_lat | Latitude of tagging location |
tagging_lon | Longitude of tagging location |
country | Country |
geom | Geometry field added by OBIS-SEAMAP |
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OBIS-SEAMAP ID | 1122 |
Seabirds | 0 |
Marine mammals | 0 |
Sea turtles | 703 |
Rays and sharks | 0 |
Other species | 0 |
Non spatial | 0 |
Non species | 0 |
Total | 703 |
Date, Begin | 2012-03-29 |
Date, End | 2012-08-15 |
Temporal prec. | 111111 |
Latitude | -7.33 - -4.71 |
Longitude | 39.29 - 39.78 |
Coord. prec. | 5 decimal digits |
Platform | Tag |
Data type | Telemetry location |
Tracklines | YES (ID: 1123) |
if ($show_effort_stat) {
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Traveled (km) | 1,376 |
Travel hours | 2,090 |
}
if ($sources != null and $sources != "" and $dataset_id != 427) { // Do not show ESAS
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Contr. through | |
}
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Registered | 2014-03-10 |
Updated | 2014-10-07 |
Status | Published |
Sharing policy |
CC-BY (All) |
Shared with |
OBIS*
GBIF (via DOI)* * Aggregated summary |
See metadata in static HTML |
See metadata in FGDC XML |
See download history / statistics |
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