FN Archimer Export Format
PT J
TI Effects of habitat modifications on the movement behavior of animals: the case study of Fish Aggregating Devices (FADs) and tropical tunas
BT 
AF Pérez, Geraldine
   DAGORN, Laurent
   Deneubourg, Jean-Louis
   Forget, Fabien
   Filmalter, John D.
   Holland, Kim
   Itano, David
   Adam, Shiham
   Jauharee, Riyaz
   Beeharry, Sunil P.
   Capello, Manuela
AS 1:1;2:1;3:2;4:1;5:3;6:4;7:5;8:6;9:1;10:7;11:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;
C1 MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
   Unit of Social Ecology, Université Libre de Bruxelles (ULB), Bruxelles, Belgium
   South African Institute for Aquatic Biodiversity, Grahamstown, South Africa
   Hawai’i Institute of Marine Biology at University of Hawai’i, Kane’ohe, Hawai’i, USA
   Institute for Marine and Atmospheric Reserch at University of Hawaiʻi, Mānoa, Hawai’i, USA
   International Pole and Line Foundation, 1 London Street, Reading, RG1 4QW, UK
   Ministry of Ocean Economy, Marine Resources, Fisheries and Shipping, Port Louis, Mauritius
C2 IRD, FRANCE
   UNIV LIBRE BRUXELLES, BELGIUM
   SAIAB, SOUTH AFRICA
   UNIV HAWAII, USA
   UNIV HAWAII, USA
   INTERNTL POLE LINE FND, UK
   MINIST OCEAN ECONOMY MARINE RES FISH SHIPPING, MAURITIUS
UM MARBEC
IN WOS Cotutelle UMR
   DOAJ
   copubli-europe
   copubli-int-hors-europe
   copubli-sud
IF 3.6
TC 11
UR https://archimer.ifremer.fr/doc/00659/77137/78454.pdf
   https://archimer.ifremer.fr/doc/00659/77137/78455.png
   https://archimer.ifremer.fr/doc/00659/77137/78456.docx
   https://archimer.ifremer.fr/doc/00659/77137/78457.docx
   https://archimer.ifremer.fr/doc/00659/77137/78458.zip
   https://archimer.ifremer.fr/doc/00659/77137/78459.png
LA English
DT Article
DE ;Acoustic tagging;Associative behavior;Density of floating objects;Movement behavior;Tropical tuna
AB Background Aggregation sites represent important sources of environmental heterogeneity and can modify the movement behavior of animals. When these sites are artificially established through anthropogenic actions, the consequent alterations to animal movements may impact their ecology with potential implications for their fitness. Floating objects represent important sources of habitat heterogeneity for tropical tunas, beneath which these species naturally aggregate in large numbers. Man-made floating objects, called Fish Aggregating Devices (FAD), are used by fishers on a massive scale to facilitate fishing operations. In addition to the direct impacts that fishing with FADs has on tuna populations, assessing the effects of increasing the numbers of FADs on the ecology of tuna is key for generating sound management and conservation measures. Methods This study investigates the effects of increasing numbers of FADs (aggregation sites) on the movements of tunas, through the comparison of electronic tagging data recorded from 146 individuals tunas (yellowfin tuna, Thunnus albacares, and skipjack tuna, Katsuwonus pelamis) tagged in three instrumented anchored FAD arrays (Mauritius, Oahu-Hawaii and Maldives), that differed according to their distances among neighboring FADs. The effect of increasing inter-FAD distances is studied considering a set of indices (residence times at FADs and absence (travel) times between two visits at FADs) and their trends. Results When inter-FAD distances decrease, tuna visit more FADs (higher connectivity between FADs), spend less time travelling between FADs and more time associated with them. The trends observed for the absence (travel) times appear to be compatible with a random-search component in the movement behaviour of tunas. Conversely, FAD residence times showed opposite trends, which could be a result of social behavior and/or prey availability. Conclusion Our results provide the first evidence of changes in tuna associative behavior for increasing FAD densities. More generally, they highlight the need for comparing animal movements in heterogeneous habitats in order to improve understanding of the impacts of anthropogenic habitat modifications on the ecology of wild animals. 
PY 2020
PD NOV
SO Movement Ecology
SN 2051-3933
PU Springer Science and Business Media LLC
VL 8
IS 1
UT 000588372500001
DI 10.1186/s40462-020-00230-w
ID 77137
ER

EF