title: Cellular energy allocation in mussels (Mytilus galloprovincialis) from the stratified estuary as a physiological biomarker.
abstract: This study demonstrates the usefulness of cellular energy allocation (CEA) evaluations as a physiological biomarker to infer the occurrence of natural stress in native populations of mussels inhabiting the stratified estuary (Krka River estuary, Croatia). Sampling sites were selected based on their differences in the salinity and temperature. The CEA value was calculated as a ratio between available energy (E(a)) and energy consumption (E(c)). Generally, higher values of E(a) were recorded in June than in November, which were especially evident in the storage components (carbohydrates and lipids), while the constitutive component (proteins) remained relatively constant. The highest E(c) was recorded in mussels at estuarine site compared to coastal site, which may be caused by the energetically costly maintenance of osmotic balance. Decrease in CEA recorded in estuarine mussels may ultimately result in a lower amount of energy available for growth, reproduction, or defence against other stresses (e.g. pollution).
authors.affiliation: Ruđer Bošković Institute, Division for Marine and Environmental Research, Bijenička c. 54, P.O. Box 180, HR-10002 Zagreb, Croatia. erk@irb.hr
authors.forename: Marijana
authors.initials: M
authors.lastname: Erk
authors.forename: Dušica
authors.initials: D
authors.lastname: Ivanković
authors.forename: Željka
authors.initials: Ž
authors.lastname: Strižak
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism; D050260:Carbohydrate Metabolism / Q000187:drug effects; D004734:Energy Metabolism / Q000187:drug effects*; D004784:Environmental Monitoring / Q000379:methods*; D005260:Female; D005618:Fresh Water / Q000737:chemistry; D050356:Lipid Metabolism / Q000187:drug effects; D049878:Mytilus / Q000166:cytology / Q000378:metabolism* / Q000502:physiology; D012623:Seawater / Q000737:chemistry; D013312:Stress, Physiological; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000633:toxicity
chemical_list: D015415:Biomarkers; D014874:Water Pollutants, Chemical