Canary Islands - OAG

Data provider
Observatorio Ambiental Granadilla
Originating data center
Satellite Tracking and Analysis Tool (STAT)
Project partner
Observatorio Ambiental Granadilla (OAG).- Dr Antonio Machado

Sociedad de Estudio de Cetáceos en el Archipiélago Canario (SECAC).- Vidal Martín

Centro de Gestión de Biodiversidad (BIOGES) del Departamento de Biología de la Universidad de Las Palmas de Gran Canaria.- Dr Luis Pelipe López-Jurado

Centro de Recuperación de Fauna Silvestre del Cabildo Insular de Gran Canaria (CRFS).- Pascual Calabuig
Project sponsor or sponsor description
Ministerio de Fomento

The waters around Canary Islands constitute a foraging ground for juvenile loggerheads from different Atlantic nesting populations.

The Granadilla Environmental Observatory (OAG, Observatorio Ambiental Granadilla) is developing a monitoring program of the loggerhead in order to gain additional information on the distributional patterns of the species provided by previous programs (i.e. Aegina).

The OAG is a Spanish State foundation recently created and based in Tenerife, Canary Islands, aiming to monitor environmental conditions of the sea and the state of biodiversity and marine protected areas in waters around the Canary Islands and, extensively, the archipelago of Madeira and the Azores (the Atlantic subregion called Macaronesia). One of its objectives is also the follow-up of the impacts of large marine-based infrastructures, such as large ports.

Loggerheads are present in the archipelago the entire the year, but there are no breeding colonies. To study an open resident segment of the Atlantic population, satellite tracking data from previous projects were compiled, and 19 additional animals marked, increasing the dataset to 39 turtles, with 14,608 high quality signals. Each year observation
transects were performed on at least three islands for estimating the relative
density of turtles. To analyze the segment size/age structure as well as the negative impacting factors on the species, data from all recovery centers in the Canaries were compiled and studied (2,836 specimens, 1998-2012). These dataseries are far from being optimal, but constitute the best available information at present.

Visit STAT's project page for additional information.

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.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.

Attributes in dataset

Attribute (table column)	Description
prognum	Program number
tag_id	PTT ID
lc	Location class
iq	Quality indicator
dir1	Dir 1
nb_mes	Number of messages received
big_nb_mes	definition not provided
best_level	Best signal strength in dB
pass_duration	Pass duration in seconds
nopc	Number Of Plausibility Checks successful (from 0-4)
calcul_freq	Calculated frequency
altitude	Altitude used for location calculation
sensors	Sensors
species	Species name
project_id	STAT Project ID
lc_filter	Parameters to location filtering
speed_filter	Parameters to speed filtering
distance_filter	Parameters to distance filtering
topo_filter	Parameters to topo filtering
time_filter	Parameters to time filtering
angle_filter	Parameters to angle filtering
life_stage	Life stage of the animal
gender	Gender of the animal
wetdry	Wet or dry
wetdry_filter	Parameters to Wet or dry filterint
obs_datetime	Date and time (local time zone)
timezone_h	Time difference from UTC