Fig 1.
Maps of bottle tag movements a) Expedition site map of the 10 sites in the Sea to Source Expedition; the first three sites in Bangladesh ((1) Bhola, (2) Chandpur and (3) Rajbari) and 7 remaining in India ((4) Sahibganj, (5) Patna, (6) Varanasi, (7) Kannauj, (8) Anupshahar, (9) Rishikesh, (10) Harsil) b) Phase A bottle A7 (pink) deployed in (8) Anupshahar c) Phase B bottle B9 (blue) deployed in (2) Chandpur d) Phase B bottle tags deployed at sea in the Bay of Bengal (B1 (red), B2 (orange)) and (1) Bhola (B4 (yellow)).
Star = deployment location, Black diamond = end location, Green triangle = expedition site location. Maps throughout this research article were created using ArcGIS® software by Esri. ArcGIS® and ArcMap™ are the intellectual property of Esri and are used herein under license. Copyright © Esri. All rights reserved. For more information about Esri® software, please visit www.esri.com. Contains information from OpenStreetMap and OpenStreetMap Foundation, which is made available under the Open Database License.
Fig 2.
The shape and profile of the bottle tag.
a) A transparent schematic showing the seating of batteries and placement of electronics inside the bottle’s enclosure; a = Horizon GPS board, b = Cellular antenna, c = Cellular or Argos satellite board, d = CNC-milled enclosure, e = Battery board, f = O-ring seal. b) Transparent top, side, bottom view and orientation of batteries inside the bottle’s internal cavity; g = Positioning of AA lithium batteries c) Phase A GSM bottle tags d) observed PET bottles in river bank Ganges River e) Phase B satellite bottle tag after deployment.
Table 1.
Tracking information.
Fig 3.
Displacement plots; bottle straight distance displacement movements over time tracked.
Star = release. Bottle = tracking finished. a), b), c) & d) river deployments and e) & f) at sea deployments.