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Spawning season and temperature relationships for sardine (Sardina pilchardus) in the eastern North Atlantic

Published online by Cambridge University Press:  25 August 2006

S.H. Coombs ,
T.J. Smyth ,
D.V.P. Conway ,
N.C. Halliday ,
M. Bernal ,
Y. Stratoudakis  and
P. Alvarez
S.H. Coombs
Affiliation:
Marine Biological Association of the United Kingdom (MBA), The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK
T.J. Smyth
Affiliation:
Plymouth Marine Laboratory (PML), Prospect Place, The Hoe, Plymouth, PL1 3DH, UK.
D.V.P. Conway
Affiliation:
Marine Biological Association of the United Kingdom (MBA), The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK
N.C. Halliday
Affiliation:
Marine Biological Association of the United Kingdom (MBA), The Laboratory, Citadel Hill, Plymouth, PL1 2PB, UK
M. Bernal
Affiliation:
Instituto Español de Oceanografía (IEO), Centro Costero de Cádiz, Centro Andaluz de Ciencia y Tecnología Marina, Poligono del Río San Pedro s/n, 11519 Puerto Real, Cádiz, Spain
Y. Stratoudakis
Affiliation:
Instituto de Investigação das Pescas e do Mar (IPIMAR), Avenida de Brasilia, 1449-006, Lisbon, Portugal.
P. Alvarez
Affiliation:
Fundación AZTI, Herrera Kaia Portualdea, Pasaia 20110, Guipúzcoa, Spain
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Abstract

Spawning temperature preferences for sardine (Sardina pilchardus) in the eastern North Atlantic were determined from egg survey data. These were compared with climatological temperature cycles (1986–2002) derived from satellite observations, by geographical region, to predict spawning seasons. Optimum spawning temperatures were determined as 14.0–15.0°C from the English Channel to Portugal and 16.0–18.0°C for all north-west African regions. Spawning seasons were closely related to the general latitudinal trend of the annual temperature cycle, with modification by upwelling in the western Iberian and north-west African regions. Some differences between temperature-based spawning season predictions and field observations were related to variations in seasonal plankton production. Correlations in the annual time-series of favourable spawning temperatures suggested relatively strong linkages between the southern areas from Portugal to Senegal. There was no consistent relationship between annual variations in extent of temperature-predicted spawning seasons and observed field abundance of eggs.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 86 , Issue 5 , October 2006 , pp. 1245 - 1252
Copyright
2006 Marine Biological Association of the United Kingdom

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