10.5061/DRYAD.724MK
Kirk, Mark A.
University of Idaho
Caudill, Christopher C.
University of Idaho
Data from: Network analyses reveal intra- and interspecific differences in
behaviour when passing a complex migration obstacle
Dryad
dataset
2017
altered landscapes
spatial dynamics
barriers
lamprey
fish passage
network analyses
Salmon
telemetry
2017-08-24T00:00:00Z
2017-08-24T00:00:00Z
en
https://doi.org/10.1111/1365-2664.12786
206336 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Network theory offers new perspective on movement data by evaluating
the relationships between animal movements (links) and detection locations
(nodes) in spatially complex systems, including human-altered landscapes.
2. We applied network analyses to intra- and interspecific movement
patterns in the migration behaviour and dam passage success of two
anadromous fish species, Pacific lamprey Entosphenus tridentatus Gairdner
and Chinook salmon Oncorhynchus tshawytscha Walbaum, when moving through a
large multi-fishway hydroelectric project (Bonneville Dam, USA). 3.
Network analyses revealed greater variation in movement for Pacific
lamprey compared with Chinook salmon. Salmon that passed the dam had
networks consisting of more direct passage routes with fewer overall
movements compared with lamprey that passed the dam. Lamprey that did not
pass the dam exhibited a wide range of behaviours, from approaching only
one fishway site to testing all possible passage routes. Accounting for
the time spent in the network improved the ability to detect biological
differences in network structure for lamprey that did and did not pass the
dam. 4. The movement patterns likely resulted from different behavioural
responses to complex environmental and internal factors affecting a
philopatric species (Chinook salmon) versus a non-philopatric species
(Pacific lamprey) when moving through an engineered environment designed
primarily for salmon. 5. Synthesis and applications. Our case study
highlights the potential for network analyses to link questions of basic
movement ecology with monitoring of movement and behaviour in
human-altered landscapes. Network analyses can thus serve as a valuable
tool for describing movement and behaviour in the face of environmental
change and assessing the effectiveness of mitigation efforts at spatially
complex obstacles to animal movement.
240 Chinook Salmon traits and network propertiesBiological traits and
network properties for all 240 Chinook salmon analyzed in this study240
Salmon traits and network properties.xls255 Lamprey traits and network
propertiesBiological traits and network properties for all 255 Pacific
lamprey analyzed in this study