10.1594/PANGAEA.995328Ibarrola, IrrintziIrrintziIbarrolaDepartment of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryPérez-Cebrecos, MaitaneMaitanePérez-Cebrecos0000-0003-3388-9881Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryResearch Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), Plentzia Marine Station, University of the Basque CountryAntolín, CarmenCarmenAntolínDepartment of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryPrieto, DanielDanielPrietoDepartment of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryUrrutxurtu, IñakiIñakiUrrutxurtuDepartment of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryUrrutia, Miren BegoMiren BegoUrrutiaDepartment of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryResearch Centre for Experimental Marine Biology and Biotechnology (PiE-UPV/EHU), Plentzia Marine Station, University of the Basque CountryGairín, IgnasiIgnasiGairínAquaculture Center, Institute of Agrifood Research and TechnologySaavedra, CarlosCarlosSaavedraTorre de la Sal Aquaculture Institute, Spanish National Research CouncilNavarro, EnriqueEnriqueNavarroDepartment of Genetics, Physical Anthropology and Animal Physiology, University of the Basque CountryPANGAEA2026Allometric scalingEnergy allocationFamily-level growth variationGrowth rate variabilityPhysiological energeticsRuditapes decussatusExperimentType of studyTemperature, waterSalinitySpecies, unique identificationSpecies, unique identification (URI)Species, unique identification (Semantic URI)Life stageFamilySize classNumber of individualsBiomass per individual, wet massBiomass, total, wet massClearance rate per individualMetabolic rate of oxygen per individualLaboratory experimentBreeding and rearing in captivityCollected individualsIncubation in flow through chamberWeighedMean rates determined using flow through chambers and calculated according to Hildreth and Crisp (1976)Mean rates computed from the decline in oxygen concentration in the chambers during 3–4 h, or until values decreased 20–30% of initial baselineMean rates computed from the decline in oxygen concentration in the chambers during 3–4 h, or until values decreased 20–30% of initial baseline; after initial 7-day starvation according to Prieto et al. (2018, 2020), Pérez-Cebrecos et al. (2022)Characterization of physiological and genetic differences in the growth of clams of interest in aquaculture (MINECOR)Physiology and genetics of growth in clams (FIGEAL)2018-11-01T00:00:00/2019-11-30T00:00:00Dataset10.1016/j.marenvres.2026.10823710.1017/S002531540002047610.1016/j.marenvres.2022.10572510.1038/s41598-020-60312-y10.1016/j.marenvres.2018.05.0072116 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset was generated to investigate the physiological basis of growth-rate variation in the grooved carpet shell clam, Ruditapes decussatus, at both inter-family and intra-family levels. The study examined whether differences in energy acquisition and metabolic expenditure contribute to the large variability in growth performance observed among full-sibling individuals reared under identical environmental conditions. Four full-sibling families were produced by controlled biparental crosses from broodstock collected in Cambados and maintained at aquaculture facilities of Institut de Recerca i Tecnologia Agroalimentàries. Two experiments were conducted during ontogeny: a juvenile stage experiment beginning 4 months after fertilization and an adult stage experiment conducted 18 months after fertilization. Clams were size-classified and maintained under controlled laboratory conditions for two months before physiological measurements. Clams were analyzed across their natural size distribution. The dataset contains morphometric and physiological measurements including shell length (mm), live weight (mg), dry weight of soft tissues (mg), shell dry weight (mg), total dry weight (mg), initial growth rate (mg day⁻¹), clearance rate (ml h⁻¹), routine metabolic rate (ml O₂ h⁻¹), and standard metabolic rate (ml O₂ h⁻¹). Measurements were obtained from individuals or homogeneous groups spanning the full size range within each family. Clearance rate was determined using open-flow feeding chambers supplied with Isochrysis galbana, while metabolic rates were estimated from oxygen consumption measured in closed respirometry chambers at 19 °C. Data collection was performed in laboratory facilities of the University of the Basque Country, following family production and early rearing at IRTA. The dataset includes morphometric records, physiological measurements, and allometric relationships describing the scaling of feeding and metabolic traits with body size during juvenile and adult stages. These data provide a resource for studies of growth heterogeneity, physiological energetics, allometric scaling, selective breeding, and aquaculture performance in marine bivalves. The dataset can be reused to investigate links between growth potential, energy balance, and family-related variation in physiological traits.-8.8210.659840.627943.33Leioa, Biscay, Basque Country, SpainLa Ràpita, Catalonia, SpainCambados, Galicia, SpainMinistry of Economy, Industry and Competitivenesshttps://doi.org/10.13039/501100003329AGL-2017-87745-C2-1-RCharacterization of physiological and genetic differences in the growth of clams of interest in aquacultureMinistry of Economy, Industry and Competitivenesshttps://doi.org/10.13039/501100003329AGL-2017-87745-C2-2Physiology and genetics of growth in clams