Climate induced temperature effects on growth performance, fecundity and recruitment in marine fish: developing a hypothesis for cause and effect relationships in Atlantic cod and common eelpout

• Published in: Continental Shelf Research
• Main Authors: H. O. POERTNER, B. BERDAIL, R. BLUST, BRIX, B. DE WACHTER, A. GIULIANI, T. JOHANSEN, T. FISCHER, R. KNUST, G. LANNIG, G. NAEVDAL, A. NEDENES, G. NYHAMMER, F. J. SARTORIS, J. SERENDERO, P. SIRABELLA, COLOSIMO, Alfredo
• Other Authors: H. O., Poertner, B., Berdail, R., Blust, Brix, Colosimo, Alfredo, B., DE WACHTER, A., Giuliani, T., Johansen, T., Fischer, R., Knust, G., Lannig, G., Naevdal, A., Nedene, G., Nyhammer, F. J., Sartori, J., Serendero, P., Sirabella
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier Science Limited:Oxford Fulfillment Center, PO Box 800, Kidlington Oxford OX5 1DX United Kingdom:011 44 1865 843000, 011 44 1865 843699, EMAIL: [e-mail], [e-mail], INTERNET: http://www.elsevier.com, http://www.elsevier.com/locate/shpsa/, Fax: [phone] 2001
• Subjects: Temperature effect; Fish fecundity; White Sea; atlantic cod; Gadus morhua; North Atlantic
• Online Access: http://hdl.handle.net/11573/26169; https://doi.org/10.1016/S0278-4343(01)00038-3; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=000172870000005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=0c7ff228ccbaaa74236f48834a34396a; http://www.scopus.com/inward/record.url?eid=2-s2.0-0035659882&partnerID=65&md5=2473181a36ec1b13dc5994253b7b3377

Effects of global warming on animal distribution and performance become visible in many marine ecosystems. The present study was designed to develop a concept for a cause and effect understanding with respect to temperature changes and to explain ecological findings based on physiological processes. The concept is based on a wide comparison of invertebrate and fish species with a special focus on recent data obtained in two model species of fish. These fish species are both characterized by northern and southern distribution limits in the North Atlantic: eelpout (Zoarces viviparus), as a typical non-migrating inhabitant of the coastal zone and the cod (Gadus morhua), as a typical inhabitant of the continental shelf with a high importance for fisheries. Mathematical modelling demonstrates a clear significant correlation between climate induced temperature fluctuations and the recruitment of cod stocks. Growth performance in cod is optimal at temperatures close to 10 degreesC, regardless of the population investigated in a latitudinal cline. However, temperature specific growth rates decrease at higher latitudes. Also, fecundity is less in White Sea than in North and Baltic Sea cod or eelpout populations. These findings suggest that a cold-induced shift in energy budget occurs which is unfavorable for growth performance and fecundity. Thermal tolerance limits shift depending on latitude and are characterized by oxygen limitation at both low or high temperatures. Oxygen supply to tissues is optimized at low temperature by a shift in hemoglobin isoforms and oxygen binding properties to lower affinities and higher unloading potential. Protective stimulation of heat shock protein synthesis was not observed. According to a recent model of thermal tolerance the downward shift of tolerance limits during cold adaptation is associated with rising mitochondrial densities and, thus, aerobic capacity and performance in the cold. especially in eurythermal species. At the same time the costs of mitochondrial maintenance ...