Automated Datalogging Case Study

automated datalogging 0

Cape Gannets, Morus capensis, South Africa
Automated long-term monitoring for time-activity budgets

Climate-driven and anthropogenic pressures are increasing on fish stocks, which is linked to Seabird demographics, diet and particularly foraging behaviour. Seabirds, such as Cape Gannets, can respond to variations in prey availability by adjusting their time-activity budgets.

In this study, a long-term method for monitoring timeactivity budgets using leg-ring-mounted VHF tags and datalogging receivers is tested.

Cape Gannets breed colonially, are long-lived and highly site faithful (breeding/nesting), so are an ideal species for trialling this monitoring method.

 

automated datalogging 1

 

 

 


Equipment Used


DataSika-C5 Coded Datalogging VHF Receiver, powered via Solar Panels on an outbuilding on the island, ~40m from the Gannet Colony

Yagi antenna, fixed on a 7m mast, directed towards the Gannet colony.

80 x NTQB-6-2 (4.5g, 30cm flexible antenna) Coded VHF Transmitters were programmed with a 39 - 40s pulse interval were fitted to leg rings across two seasons.

• All transmitters were on the same frequency, but transmitted a unique ID ‘code’, allowing simultaneous, continuous monitoring of all birds.

Insights

1. No apparent negative effects on the birds from the VHF transmitters (no apparent differences in body condition, behaviour etc. from control group).

2. Nest attendance and foraging trip data obtained by automated logging was not statistically different from direct observations.

3. Automated datalogging provided data at a finer scale than conventional nest monitoring.

4. Coded transmitters have allowed for a large sample size to be monitored continuously.

5. High-quality time-activity budget data was obtained over a long study period (two field seasons).

6. Automated data collection greatly reduces sampling effort, when compared to direct nest monitoring.

 

 
automated datalogging 3

 

  automated datalogging 4

Nest attendance (top right graph) and trip (bottom right graph) durations from direct nest observation and automated data collected from Cape Gannets in relation to chick age. Comparisons include directly observed data from control birds and those equipped with VHF transmitters, as well as automated VHF data from equipped birds.

Growth rate of Cape Gannet chicks from directly observed control nests where the parents were equipped with VHF transmitters. For each treatment nest type, n = 10.

In Conclusion


Time-activity budgets are driven by prey availability; automated long-term data collection on foraging trip duration for seabirds could be used to assess the state of fish prey resources.


This case study is a summary of the publication: Rishworth, G. M., Tremblay, Y., Green, D. B., Pistorius, P. A. (2014), An automated approach towards measuring time-activity budgets in colonial seabirds. Methods in Ecology and Evolution. doi: 10.1111/2041-210X.12213.


Many thanks to the authors for their permission and assistance in the creation of this case study.

 

To the whole team at Sirtrack,

I wanted to personally send you our 2011 Thank you video which highlights the achievements we have made together for the people and animals at N/a’an ku sê. Thank you for everything you’ve done in 2011 to help make this happen – from sponsoring collars to help us safely release threatened cheetahs and sharing our news and stories with your clients - here’s to a successful 2012 together!

Please enjoy it and feel proud of the difference you’ve made:

http://www.youtube.com/watch?v=k-wHpBVytrI&;feature=plcp&context=C300d1dbUDOEgsToPDskK2BT7ILrG91-MWctn4Pyx9

Just to let you know, our Wild Animal Orphans TV series premieres on Tuesday 6th March on Animal Planet across Africa, as well as in Holland, Belgium, Finland, Norway, Denmark, Sweden, Greece, Croatia, Hungary, Turkey, many other European countries, across the Middle East and Russia. I’m currently seeing how I can get you a copy of Groen so you can see the exposure you got. I might have to wait until all 13 episodes of WAO is aired before sending to you, hope that’s ok.

With best wishes,

Lucy Hale

Fundraising and Marketing Manager

N/a’an ku se Foundation

www.naankuse.com

TTo the whole team at Sirtrack,

I wanted to personally send you our 2011 Thank you video which highlights the achievements we have made together for the people and animals at N/a’an ku sê. Thank you for everything you’ve done in 2011 to help make this happen – from sponsoring collars to help us safely release threatened cheetahs and sharing our news and stories with your clients - here’s to a successful 2012 together!

Please enjoy it and feel proud of the difference you’ve made:

http://www.youtube.com/watch?v=k-wHpBVytrI&feature=plcp&context=C300d1dbUDOEgsToPDskK2BT7ILrG91-MWctn4Pyx9

Just to let you know, our Wild Animal Orphans TV series premieres on Tuesday 6th March on Animal Planet across Africa, as well as in Holland, Belgium, Finland, Norway, Denmark, Sweden, Greece, Croatia, Hungary, Turkey, many other European countries, across the Middle East and Russia. I’m currently seeing how I can get you a copy of Groen so you can see the exposure you got. I might have to wait until all 13 episodes of WAO is aired before sending to you, hope that’s ok.

 

With best wishes,

 

Lucy Hale

Fundraising and Marketing Manager

N/a’an ku se Foundation

www.naankuse.como the whole team at Sirtrack,

I wanted to personally send you our 2011 Thank you video which highlights the achievements we have made together for the people and animals at N/a’an ku sê. Thank you for everything you’ve done in 2011 to help make this happen – from sponsoring collars to help us safely release threatened cheetahs and sharing our news and stories with your clients - here’s to a successful 2012 together!

Please enjoy it and feel proud of the difference you’ve made:

http://www.youtube.com/watch?v=k-wHpBVytrI&feature=plcp&context=C300d1dbUDOEgsToPDskK2BT7ILrG91-MWctn4Pyx9

Just to let you know, our Wild Animal Orphans TV series premieres on Tuesday 6th March on Animal Planet across Africa, as well as in Holland, Belgium, Finland, Norway, Denmark, Sweden, Greece, Croatia, Hungary, Turkey, many other European countries, across the Middle East and Russia. I’m currently seeing how I can get you a copy of Groen so you can see the exposure you got. I might have to wait until all 13 episodes of WAO is aired before sending to you, hope that’s ok.

 

With best wishes,

 

Lucy Hale

Fundraising and Marketing Manager

N/a’an ku se Foundation

www.naankuse.com