Variation in Size and Growth of the Great Scallop Pecten maximus along a Latitudinal Gradient

Type Article
Date 2012-05
Language English
Author(s) Chauvaud Laurent1, Patry Yann1, Jolivet Aurelie1, Cam Emmanuelle2, 3, Le Goff Clement6, 7, Strand Oivind4, Charrier Gregory5, Thebault Julien1, Lazure PascalORCID6, 7, Gotthard Karl8, Clavier Jacques1
Affiliation(s) 1 : Univ Bretagne Occidentale, Inst Univ Europeen Mer, Lab Sci Environm Marin, CNRS,UMR 6539, Plouzane, France.
2 : CNRS, Ctr Ecol Fonct & Evolut, UMR 5175, F-34033 Montpellier, France.
3 : Univ Toulouse 3, CNRS, UMR 5174, Lab Evolut & Divers Biol, F-31062 Toulouse, France.
4 : Inst Marine Res, N-5024 Bergen, Norway.
5 : Univ Gothenburg, Dept Marine Ecol Tjarno, Stromstad, Sweden.
6 : IFREMER, Ctr Brest, LOS, Plouzane, France.
7 : IFREMER, Ctr Brest, Lab Phys Hydrodynam & Sedimentaire PHYSED, Plouzane, France.
8 : Stockholm Univ, Dept Zool, S-10691 Stockholm, Sweden.
Source Plos One (1932-6203) (Public Library Science), 2012-05 , Vol. 7 , N. 5
DOI 10.1371/journal.pone.0037717
WOS© Times Cited 41
Abstract Understanding the relationship between growth and temperature will aid in the evaluation of thermal stress and threats to ectotherms in the context of anticipated climate changes. Most Pecten maximus scallops living at high latitudes in the northern hemisphere have a larger maximum body size than individuals further south, a common pattern among many ectotherms. We investigated differences in daily shell growth among scallop populations along the Northeast Atlantic coast from Spain to Norway. This study design allowed us to address precisely whether the asymptotic size observed along a latitudinal gradient, mainly defined by a temperature gradient, results from differences in annual or daily growth rates, or a difference in the length of the growing season. We found that low annual growth rates in northern populations are not due to low daily growth values, but to the smaller number of days available each year to achieve growth compared to the south. We documented a decrease in the annual number of growth days with age regardless of latitude. However, despite initially lower annual growth performances in terms of growing season length and growth rate, differences in asymptotic size as a function of latitude resulted from persistent annual growth performances in the north and sharp declines in the south. Our measurements of daily growth rates throughout life in a long-lived ectothermic species provide new insight into spatio-temporal variations in growth dynamics and growing season length that cannot be accounted for by classical growth models that only address asymptotic size and annual growth rate.
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Chauvaud Laurent, Patry Yann, Jolivet Aurelie, Cam Emmanuelle, Le Goff Clement, Strand Oivind, Charrier Gregory, Thebault Julien, Lazure Pascal, Gotthard Karl, Clavier Jacques (2012). Variation in Size and Growth of the Great Scallop Pecten maximus along a Latitudinal Gradient. Plos One, 7(5). Publisher's official version : https://doi.org/10.1371/journal.pone.0037717 , Open Access version : https://archimer.ifremer.fr/doc/00087/19861/