News

Tue, Dec 01 2020

DPTV 2 quick video tutorial

We have created a quick video tutorial for our new DPTV 2 software. The short video shows how easy it is to perform an automated water velocity calibration in one of our mini swim tunnels using a uEye camera and a DAQ-BT device. 

We hope you like it. Feel free to contact us if you have any questions or want to know more about the DPTV 2 software.

Fri, Oct 09 2020

New open flume tank

We have introduced a new product to our portfolio.

This Open flume tank is for force-swimming individual or groups of fry-juvenile zebrafish; or anything aquatic and similar sized, for that matter. This system is ideal for zebrafish phenotyping, swimming performance, exercise physiology, behavior etc. in freshwater or seawater species. The water velocity (= swimming speed) can be adjusted using the included diaphragm valve and paddlewheel flow sensor, and can be adjusted from 2-28 cm/s. The tank has an open test section meaning that introducing, accessing, and removing the animal is a breeze. The section provides a clear view (e.g., for filming) from four angles (left, right, above and below). It is also possible to adjust the water depth by switching between the included weirs.

The open flume tank was developed with versatility and high-throughput in mind.

Thu, Sept 24 2020

NEW LoliTrack 5 update

A new updated LoliTrack version 5.1.0 is now available and free to download and install for all LoliTrack 5.x.x users: https://loligosystems.com/downloads

New features include:

  • The distance from animal(s) to center of zone(s) can be logged and exported.
  • % of time spend in zone(s) can be logged an exported.
  • Masks can be individually saved and loaded.
  • Zones have the same look-and-feel as masks and can now be rotated.
  • Arrow keys can be used to scroll on the timeline.
  • Duration of selected timeline intervals are now shown.

Minor bug fixes:

  • Timeline fixed to behave correctly with respect to frame rate.
  • Microplate object tracking ‘escapes' from the wells have been fixed.
  • When changing frame rates of uEye cameras, the pixel clock is set to the highest possible.
  • 3D Excel exported frames without data are now exported with empty fields.
  • Fixed an issue where pop-up windows would slow down or crash the software.
  • Improved speed of object auto-selection of multiple objects.
  • Improved camera communication.

Wed, Sept 16 2020

CASE at UNT: Like a treadmill for fish

One of the products we offer is a swim tunnel for aquatic animals. It is “like a treadmill for fish”, we usually answer, when asked what a swim tunnel is for. But what is a swim tunnel actually used for?

A good example is found in a recent press release featuring UNT professor, Ed Mager. The press release describes why Ed and his team’s research on four species of Guadalupe River fish is important. Ed explains that:

Once we understand the swimming performance of the river’s occupants, we can make recommendations of maximum water flow rates that can be incorporated into the planning of waterway crossings.

In other words, the research team use one of our swim tunnels to examine the maximum sustained velocity and burst speed of the Guadalupe Bass (the state fish of Texas), Guadalupe Roundnose Minnow, Guadalupe Darter and Plateau Shiner that all inhabit the river at various life stages. The Loligo swim tunnel (see picture above) enables the team to swim the fish at different water velocities in a fully controlled environment while they are able to automatically measure their oxygen consumption rate, at the same time. The setup further allows accurate control of temperature, and the option to film the swimming fish from different angles, if needed.

Overall, you may find a swim tunnel used in physiology studies and in research on energetics, behavior, biomechanics and kinematics – not only in fish, but essentially in any aquatic animals that meet the physical requirements of the swim tunnel.

Fri, Mar 06 2020

P50 data broadens hypoxia study

Daniel Montgomery and Rod Wilson from University of Exeter and their collaborators used our BOBS™ instrumentation to measure haemoglobin-O2 affinity (P50) on European sea bass in hypoxic conditions.

Their findings suggest that it is worthwhile considering the Hb-O2 affinity in hypoxia studies because of the effects of the naturally raised CO2 levels that follows a hypoxic event.

Full article:

Rising CO2 enhances hypoxia tolerance in a marine fish
Montgomery, Daniel W; Simpson, Stephen D; Engelhard, Georg H; Birchenough, Silvana NR; Wilson, Rod W; (2019)
Scientific reports

Link to article

Thu, Jan 30 2020

Why upgrade to LoliTrack 5?

The latest version of LoliTrack is out! This major upgraded version features many improvements and additions as well as a much faster performance on regular PCs.

IMPORTANT: We offer a 50 % discount to all LoliTrack 1-4 and DanioTrack license holders. This offer is valid in 2020 only. For more information, click here.

MICROPLATE TRACKING
LoliTrack 5 includes several tracking tools that will save a lot of time. An example is tracking organisms in 24-, 48-, and 96-well microtiter plates for fast screening of activity levels or locomotion:

BODY POINTS
Another example is that LoliTrack 5 can identify specific body points (tail, head, midline center, center of gravity) as well as the object midline which is especially useful for studying kinematics (tail beat frequency, body oscillations etc.) or specific behavior (direction of orientation or movement, turning rate etc.). A new parameter, “BEND”, can be calculated as well giving body angles, i.e., for automated tracking of tailbeat frequency or other body oscillations:

Nearest Neighbor Distance / Inter-Individual Distance
You can export a visual representation as well as the position data for nearest neighbor distance and inter-individual distance for multiple objects:

HEAT MAP
Heat mapping is now an option as well for specific parameters like position, speed, acceleration etc.:

ERROR CORRECTION TOOLS
Other important updates include the possibility to correct tracking errors like object identity switching or even if the object leaves and re-enters the arena.

3D TRACKING
LoliTrack 5 supports 3D tracking and analysis. With two cameras (or video files), users can track and analysis the behavior of a single object in 3D. The 3D tracking feature further allows exporting the trajectories as a 3D model or as video for data presentation:

PERFORMANCE
LoliTrack 5 has been optimized with performance in mind. On regular Windows 10 PCs, users of LoliTrack 5 will find that calibrating, creating filters and indeed tracking runs more smoothly and faster compared to the previous version, LoliTrack 4. The follow diagram shows six examples of how many seconds it took to track the same video in LoliTrack 5 compared to LoliTrack 4:

VIDEO FILE COMPATIBILITY
LoliTrack 5 now supports most video file formats unlike previous version that only handled .AVI files.

VIDEO CAMERA
Another new feature in LoliTrack 5 is the built-in video recorder. The video recorder allows the user to capture and edit videos from within LoliTrack 5 using most cameras connected to the PC.

USER-INTERFACE
The entire LoliTrack 5 interface has been redesigned to meet today’s clean and streamlined user demands. Tracking a video follows an intuitive step-by-step procedure: Load video file > Calibration > Masking > Filtering > Tracking > Analysis. Several time-saving features have been added; including the option to track a user-defined interval of the entire video or to quickly define the filter by subtracting the background.

Mon, Jan 13 2020

Sponsoring NoWPaS 2020 meeting

We are happy to be sponsoring the NoWPaS 2020 meeting at Laugarvatn, Iceland, on March 2nd – 7th. NoWPas focuses on all anadromous salmonid species and will be celebrating its 15th anniversary this year.

NoWPaS has succeeded in organizing annual workshops since its inception in Norway in 2005. Over the next fourteen years, a total of 380 early-stage researchers and 59 invited speakers have had the opportunity to give oral presentations regarding their research on salmonids.

The workshop is free for all delegates and is first come, first serve among eligible applicants.

We hope for a great meeting in Iceland!

Tue, Dec 10 2019

Loligo sponsors Nothobrancius Symposium

The Nothobranchius Symposium is a biennial meeting that serves as a platform for researchers with an interest in all aspects of Nothobranchius biology from biomedical to ecological research to meet and discuss ideas.

We will be sponsoring the 4th Nothobranchius Symposium in Brno, Czech Republic, on 3-5 June 2020, in order to support this interesting scientific community.

Official Twitter account / hashtag: https://twitter.com/Fish_EcoEvo / #notho2020

For more info about the meeting, please visit: https://notho2020.ivb.cz/

Mon, Dec 02 2019

Loligo sponsorship for EMPSEB26 meeting

We are proud to sponsor the 26th European Meeting of PhD Students in Evolutionary Biology (EMPSEB26) meeting in Killarney National Park, Ireland, by covering accommodation expenses for all the invited speakers. EMPSEB26 provides students with the opportunity to present their work to an international audience of their peers.

Please visit the official Twitter account (and use #EMPSEB26) for the meeting: https://twitter.com/Empseb26

For more info about the meeting, please visit the meeting website: https://bit.ly/2XvvIbD