Stoichiometry of growth under variable scenarios of nutrient limitation: Differential homeostasis of body composition among growth phenotypes of the Manila clam
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Fecha de publicación
2024-02-07ISSN
0141-1136
Resumen
Fast- and slow-growing phenotypes from two separate breeding families of the Manila clam (Ruditapes philippinarum) were alternatively fed two monoalgal diets with high and low N content (C:N ratios of 4.9 and 13.5, respectively). After 35 days of food conditioning, clams were sacrificed, and the soft body was dissected out into five different tissue fractions to determine the corresponding ponderal ratios (tissue wt./body wt.) and a separate analysis of the elemental composition of these tissues. Previously reported C and N balances performed with the same conditioning diets were integrated and compared with tissue composition of the same phenotypes in order to assess the efficacy of mechanisms elicited to compensate for N deficit. Broad differences in dietary N content resulted in only minor changes in whole-body C:N composition which suggests a noticeable degree of homeostatic regulation of nutrient balances. This regulation was found to be stricter in fast-compared to slow-growing phenotypes and differed among the various body tissues. Using the threshold element ratio approach, physiological mechanisms were identified that partly compensate for large stoichiometric mismatches between low-N food and body tissues.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
637 - Productos de los animales domésticos, de la caza y de la pesca
Páginas
10
Publicado por
Elsevier
Publicado en
Marine Environmental Research
Citación
Arranz, Kristina, Iñaki Urrutxurtu, Ignasi Gairín, and Enrique Navarro. 2024. “Stoichiometry of Growth Under Variable Scenarios of Nutrient Limitation: Differential Homeostasis of Body Composition Among Growth Phenotypes of the Manila Clam.” Marine Environmental Research, February, 106383. https://doi.org/10.1016/j.marenvres.2024.106383.
Número del acuerdo de la subvención
MINECO/Programa Estatal de fomento de la investigación científica y técnica de excelencia/AGL2013-49144-C3-1-R/ES/Fisiología y genética del crecimiento en bivalvos comerciales/
Program
Aqüicultura
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