Spatial and temporal variations of coastal fish larvae, ectoparasites and oceanographic conditions off central Chile

The objective of this study is to determine the temporal variation of oceanographic conditions, ichthyoplankton and their ectoparasites in nearshore marine waters. From October 11th 2012 to June 5th 2014, 30 ichthyoplankton surveys were carried out along a cross-shelf transect from 0.25 km of the co...

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Bibliographic Details
Published in:Revista de biología marina y oceanografía 2015-12, Vol.50 (3), p.563-574
Main Authors: Landaeta, M, Zavala-Muñoz, F, Palacios-Fuentes, P, Bustos, C, Alvarado-Niño, M, Letelier, J, Cáceres, M, Muñoz, G
Format: Article
Language:English
Subjects:
Caligus
Caligus sp
central Chile
Chile central
clingfish
Fish larvae
gradientes horizontales de densidad
horizontal density gradients
Ichthyoplankton
Marine
pejesapo
South America
Sudamérica
Trifur
Trifur sp
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Summary:The objective of this study is to determine the temporal variation of oceanographic conditions, ichthyoplankton and their ectoparasites in nearshore marine waters. From October 11th 2012 to June 5th 2014, 30 ichthyoplankton surveys were carried out along a cross-shelf transect from 0.25 km of the coastline to 4.50 km offshore off Montemar, Bahía Valparaíso, central Chile. We identified a total of 5,553 fish larvae, belonging to 37 taxa. The most abundant fish larvae with pelagic spawning were the common sardine Strangomera bentincki (relative abundance= 26.39%), the anchoveta Engraulis ringens (8.94%), and the lanternfish Hygophum bruuni (7.72%); whereas the most abundant species with benthic brooding were the blennies Scartichthys viridis (15.77%), Hypsoblennius sordidus (8.27%) and the clingfish Gobiesox marmoratus (7.06%). The most parasitized fish larvae were from benthic brooding origin, namely the clingfishes G. marmoratus (prevalence= 9.63%) and Sicyases sanguineus (0.54%), the kelpfish Auchenionchus variolosus (1.72%), and triplefin blenny Helcogrammoides cunninghami (3.28%).
ISSN:0717-3326
0718-1957
DOI:10.4067/S0718-19572015000400013