Distribution of Engraulis encrasicolus eggs and larvae in relation to coastal oceanographic conditions (the South-western Adriatic Sea case study)

 
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Distribution of Engraulis encrasicolus eggs and larvae in relation to coastal oceanographic conditions (the South-western Adriatic Sea case study) (EN)

BIAGOTTI, ILARIA
COSTANTINI, ILARIA
CANDUCI, GIOVANNI
De FELICE, ANDREA
MALAVOLTI, SARA
CAPUTO BARUCCHI, VINCENZO
GRILLI, FEDERICA
LEONORI, IOLE
MARINI, MAURO
BORME, DIEGO
TIRELLI, VALENTINA

EC - MIPAAF Italian National Data Collection Programs (EN)
Italian Ministry for University and Research (EN)

Identification of potential spawning and nursery areas of European anchovy (Engraulis encrasicolus) represents an essential step in the management of a resource which is of fundamental importance both for fishery and pelagic trophic web. Egg and larvae occurrence from ichthyoplankton surveys (2012 - 2015) in the South Western Adriatic Sea were examined to understand the mechanisms that control their distribution. Egg and larvae densities varied through the years with the highest values recorded in 2012 and the lowest in 2014. Positive correlations between eggs and larvae with zooplankton were observed. When quotient analysis was used to find relations with environmental and biological variables, the results pointed out an egg preference for depth between 91 and 120 m and an avoidance between 11 and 30 m. Moreover, egg avoidances for high values of chlorophyll-a (> 0.52 mg m-3) and low values of zooplankton biomass (< 199 mg m-2) were highlighted. On the other hand, different ranges of habitat preferences and avoidances were observed for larvae: preference range of depth between 11 and 60 m and avoidance > 151 m; preference for high zooplankton biomass (> 1000 mg m-2) and avoidance for low biomass (< 299 mg m-2). These correlations and the quotient values suggest that egg and larvae distribution in the South-Western Adriatic Sea is mainly driven by food availability and depth. (EN)

info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Ichthyoplankton survey; WP2 net; CTD stations; Single-parameter quotient analysis; (EN)

single-parameter quotient analysis (EN)
Marine Biology (EN)
Engraulis encrasicolus (EN)
spawning habitat (EN)
Fisheries (EN)
Oceanography (EN)
Marine Ecology (EN)
Adriatic Sea (EN)
spatial distribution (EN)
zooplankton biomass (EN)

Ελληνικό Κέντρο Θαλασσίων Ερευνών (ΕΛΚΕΘΕ) (EL)
Hellenic Centre for Marine Research (HCMR) (EN)

Mediterranean Marine Science

2018-05-23


Hellenic Centre for Marine Research (EN)

2012; 2013; 2014; 2015 (EN)
Biological samples; Oceanographic sampling; Fish eggs and larvae; (EN)
Mediterranean Sea (EN)

1791-6763
1108-393X
Mediterranean Marine Science; Vol 19, No 1 (2018); 180-192 (EL)
Mediterranean Marine Science; Vol 19, No 1 (2018); 180-192 (EN)

Copyright (c) 2018 Mediterranean Marine Science (EN)



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