Using stable isotope analysis with telemetry or mark-recapture data to identify fish movement and foraging |
| |
Authors: | Email author" target="_blank">R?A?CunjakEmail author J-M?Roussel M?A?Gray J?P?Dietrich D?F?Cartwright K?R?Munkittrick T?D?Jardine |
| |
Institution: | (1) Canadian Rivers Institute and Department of Biology, University of New Brunswick, P.O. Box 4400, Fredericton, NB, Canada, E3B 5A3;(2) Institut National de la Recherche Agronomique, Laboratoire d’Ecologie Aquatique, UMR 985, 65 rue de St Brieuc, 35042 Rennes, France;(3) Ontario Ministry of Natural Resources, Glenora Fisheries Station, 41 Hatchery Lane, RR#4, Picton, ON, Canada, K0K 2T0;(4) Canadian Rivers Institute and Department of Biology, University of New Brunswick, , Saint John, NB, Canada, E2L 4L5 |
| |
Abstract: | Information about animal movements has often been inferred from stable isotope analysis (SIA), but is dependent on animals
assimilating site-specific isotopic signatures via diet. This potential weakness in ecological interpretation can be overcome
by using other investigative tools that provide precise information about individual movement patterns. In this paper, we
demonstrate the value of combining SIA with telemetry or mark-recapture data from trapping, electrofishing and remote detection
of individuals to study the movement and feeding ecology of fishes in different habitats. In a fjord lake system in Newfoundland,
Canada, juvenile Atlantic salmon delayed downstream migration (smolts) or actively moved into a large lake (parr) where they
foraged for periods reflecting different life history strategies. In the Miramichi River (New Brunswick, Canada), SIA provided
evidence of distinct foraging habitats (tributary versus large river). By tracking fish implanted with passive integrated
transponder (PIT) tags, we distinguished between movements related to foraging versus seeking cool water refugia during high
temperature events. Finally, site fidelity and limited mobility of slimy sculpin, a small benthic fish, was established where
δ13C in muscle tissue showed a progressive enrichment downstream and where a median displacement of <10 m was estimated for sculpin
tagged with PIT tags. Technological improvements have permitted non-destructive tissue sampling of wild fishes for SIA, and
the tagging and remote detection of animals smaller than was previously possible. These advancements and the combination of
investigative tools promise new insights into animal ecology. |
| |
Keywords: | River habitat Slimy sculpin Atlantic salmon Passive integrated transponders |
本文献已被 PubMed SpringerLink 等数据库收录! |
|