RT journal article
T1 The contribution of migratory mesopelagic fishes to neuston fish assemblages across the Atlantic, Indian and Pacific Oceans
A1 Olivar, M.P.
A1 González Gordillo, Juan Ignacio
A1 Salat, J.
A1 Chust, G.
A1 Cózar Cabañas, Andrés
A1 Hernández León, S.
A1 de Puelles, M.L.F.
A1 Irigoien, X.
A2 Biología
K1 Ichthyoneuston
K1 ichthyoplankton
K1 micronekton
K1 Myctophidae
K1 oceanic realm
K1 pelagic biogeography
K1 vertical migration
AB Surface waters are an attractive foraging ground for small fish in the open ocean. This study aims to determine the importance of vertically migrating species in the neuston of oceanic waters across the Atlantic, Indian and Pacific Oceans and to ascertain the influence of environmental variables on their distribution patterns. Neustonic fish assemblages were primarily controlled by light. They were dominated by late-larvae and juveniles of Exocoetidae, Hemiramphidae and Scomberesocidae during the day. At night, the vertical migration of mesopelagic species changed the dominance pattern in favour of Myctophidae and Scomberesocidae. The neustonic families’ distribution was primarily related to sea surface temperatures, whereas environmental variables at deeper layers were related to mesopelagic migrating families. Canonical correspondence analysis showed a low but statistically significant contribution of several environmental variables to myctophid species composition (10%), with minimum oxygen concentrations ranking first in variance explanation followed by maximum fluorescence, sea surface temperature and 400-m temperature. Spatial autocorrelation also explained 17% of the variance, indicating the influence of other factors such as historical, demographic and dispersal constraints. The low number of myctophid species in the North Pacific Equatorial Countercurrent appears to be related to the low oxygen concentrations observed in this province.
YR 2015
FD 2015-08-27
LK http://hdl.handle.net/10498/19691
UL http://hdl.handle.net/10498/19691
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 15-nov-2026