LAT 2000 Series: Light-Based Geolocation Tags for Fish

LAT 2910 Fish
Internal 2.5 g with anchor options

Building upon the success of several previous generations of archival tags, Lotek Archival Tags (LAT) offer impressive data recording capabilities in an even more compact design. The LAT series is the ideal data storage solution for any biologist seeking reliable long-term life-cycle-related data for fish, wildlife or avian species. Two distinct LAT families are available: LAT1000 Series TDRs (time, temperature and depth recorders), and LAT2000 Series geolocators (light-based tags).

A selection of pressure ranges is available for each tag to ensure the best match for every application.
The LAT series features user selectable data resolution settings of up to 12 bits. Opting for a lower resolution allows an increase in the number of samples collected.
Up to 128 Mbytes of non-volatile memory are available on specific models.
The LAT series features a sea water switch.
Four memory management options are available:
1. Day Log: summarizes on board geolocation and other processes, allowing one to collect data for every day at liberty; a number of “loggables” are available to be recorded in the Day Log, e.g., daily: sea surface temperature, min. and max. pressures, min. and max. temperatures, times of sunrise and sunset, etc.;
2. Telescoping Log: allows the total times series storage capacity of the tag to be evenly distributed over the entire mission.
3. Conditional Log: samples recorded (or not) based upon the condition of one or two sampled “loggables”;
4. Basic Log: straight sampling.
LAT tags are designed for miscellaneous data collection and data compression strategies aimed at maximizing and optimizing tags' operating life and number of samples taken.
All LAT archival tags use a USB reader and a communication interface, LAT TagTalk. The reader is practical for field work as it connects to the tags’ gold electrical contacts using minigrabbers – this method is very stable and reduces the risk of interfering with the connection if the tag is moved. The software allows the user to interact with the tag, to create a flexible programming regime and to download the data from the tag.

Light-based geolocating LAT tags:

			Tags with extended memory
	LAT2500	LAT2510	LAT 2800S	LAT2800L	LAT 2810S	LAT2810L	LAT2310
			Tubular form factor:
Dimensions	8mm x 35mm	8mm x 35mm	11mm X 38mm	13mm x 44mm	11mm X 38mm	13mm x 44mm	16mm x 76mm
Weight in air	3.6g	4.25g	6.2g	10.6g	6g	13g	45g
Weight in water	2.25g	2.5g	TBD		TBD		30g
			Flatpack form factor:
Dimensions			36mm x 11mm x 7.2mm	36mm x 13mm x 10mm	N/A	N/A
Weight in air			5.5g	10g	N/A	N/A
Weight in water			TBD		N/A
Memory	128K, 512K	128K, 512K	128 Mbytes		128 Mbytes		128 Mbytes
Memory management	Custom Programming	Custom Programming	Custom Programming		Custom Programming		Custom Programming
Survival depth	2000 meters	2000 meters	2000 meters		2000 meters		2000 meters
Max. operation temperature	60° C	60° C	60° C		60° C		60° C
Min. operation temperature	-5° C	-5° C	-5° C		-5° C		-5° C
Number of samples	Variable based upon data storage options selected	Variable based upon data storage options selected	Variable based upon data storage options selected		Variable based upon data storage options selected		Variable based upon data storage options selected
Sample rate setting	>1s in 1 sec. increments	>1s in 1 sec. increments	>1s in 1 sec. increments		>1s in 1 sec. increments		>1s in 1 sec. increments
Data download	Gold electrical contacts, 57600 bps	Gold electrical contacts, 57600 bps	Gold electrical contacts, 115200 bps		Gold electrical contacts, 115200 bps		Gold electrical contacts, 115200 bps
Sea water switch	Yes	Yes	Yes		Yes		Yes
Standard depth range	50m, 500m, 1000m, 2000m	50m, 500m, 1000m, 2000m	50m, 200m, 500m, 1000m, 2000m		50m, 200m, 500m, 1000m, 2000m		50m, 200m, 500m, 1000m, 2000m
Data resolution	Up to 12 bits	Up to 12 bits maximum	Up to 12 bits maximum		Up to 12 bits maximum		Up to 12 bits maximum
Processing scale and offset	Yes	Yes	Yes		Yes		Yes
Sensors	Internal Temperature, Pressure, Light	Internal & External Temperature, Pressure, Light	Internal Temperature, Pressure, Light		Internal & External Temperature, Pressure, Light		Internal & External Temperature, Pressure, Light
Light sensor stalk	No	Yes	No		Yes		Yes
Pressure accuracy	±1%	±1%	±1%		±1%		±1%
Pressure resolution	0.05%	0.05%	0.05%		0.05%		0.05%
Temperature measurement	-5° to 35° C	-5° to 35° C	-5° to 35° C		-5° to 35° C		-5° to 35° C
Temperature accuracy	0.2°C within -5°C to 35°C	0.2°C within -5°C to 35°C	0.2°C within -5°C to 35°C		0.2°C within -5°C to 35°C		0.2°C within -5°C to 35°C
Temperature resolution	0.05° C or better	0.05° C or better	0.05° C or better		0.05° C or better		0.05° C or better
User setup	Miscellaneous ways to log data (see Key Features)	Miscellaneous ways to log data (see Key Features)	Miscellaneous ways to log data (see Key Features)		Miscellaneous ways to log data (see Key Features)		Miscellaneous ways to log data (see Key Features)
Number of log structures allowed	4	4	4		4		4
Minimum life	12 months	12 months	1 year*	2 years**	1 year*	2 years**	36 months
Expected life	To be determined	To be determined	To be determined		To be determined		To be determined
Data analysis software	Yes	Yes	Yes		Yes		Yes

N.B. These specifications are subject to change.

* at the sampling interval of every 10 seconds
** at the sampling interval of every 5 seconds
For minimum life expectancy associated with sampling intervals less than these, please contact the appropriate Lotek account manager.

	LAT 2910 Fish (Internal)	LAT 2900 Fish (External)
Dimensions	7.8mm X 26mm	4.7mm X 8mm x 33.5mm
Weight in water	1.2g	1.1g
Weight in air	2.3g (with external sensor stalk)	2.1g
Logging memory	Up to 56 kbytes
Standard depth range	50m, 100m, 200m, 500m, 1000m, 2000m
Survival depth	1.5 x pressure sensor
Number of samples	Variable based upon data storage options selected
Sample rate setting	>1s in 1 sec. increments
Data download	Gold electrical contacts, 115200 bps
Warranty life	6 months
Typical life*	12 months
Data resolution	Up to 12 bits
Sensors	Internal & External Temperature, Pressure, Light, Sea Water Switch	Internal Temperature, Pressure, Light, Sea Water Switch
External sensor stalk	Yes	No
Pressure accuracy	+/-1%
Pressure resolution	0.05%
Temperature measurement	-5° to 45° C
Temperature accuracy	Better than 0.2° C (when within -5° to 35° C)
Temperature resolution	0.05° C or better
User setup	Miscellaneous ways to log data (see Key Features)
Number of log structures allowed	3
Data analysis software	Available

N.B. These specifications are subject to change.

* Dependant upon sampling schedule and sampling regime.

Click here to view instructions for the implantation of the LAT 2810 into the peritoneal cavity of tunas.

Click here to view instructions for the intra-muscular implantation of the LAT 2910, equipped with a plastic dart anchor (PDA), at the base of the second dorsal fin in tunas.

Video showing fish-friendly attachment technique:

LAT 2800

LAT 2500

LAT 2510

LAT 2500

Light-based geolocating archival tags (PDF).
Light-based geolocating archival tags with extended memory (PDF).

Template Fit Processing (PDF)

LAT 2900 product sheet (PDF).

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