Hernandis S, Ibarrola I, Tena-Medialdea J, Vázquez-Luis M, García-March J R, Prado P, Albentosa M
Instituto de Investigación en Medio Ambiente y Ciencia Marina (IMEDMAR-UCV), Universidad Católica de Valencia SVM, C/Explanada del Puerto S/n, 03710, Calpe, Alicante, Spain.
Departamento GAFFA (Fisiología Animal), Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal herriko Unibertsitatea, 48080, Bilbao, Spain.
BMC Zool. 2022 Jul 27;7(1):43. doi: 10.1186/s40850-022-00141-w.
The measurement of the energy available for growth (scope of growth, SFG) can be used in bivalves to make a long-term prediction in a short-term experiment of the condition of the individual. In order to tackle the best conditions for captive maintenance of Mediterranean Pinnids, a SFG study was conducted using Pinna rudis as a model species. Three diets were examined to test the viability of live microalgae and commercial products: i) a control diet using 100% of live microalgae based on the species Isochrysis galbana (t-ISO), ii) a 100% of commercial microalgae diet based on the product Shellfish Diet 1800®, and iii) a 50/50% mix diet of I. galbana (t-ISO) and Shellfish Diet 1800®.
SFG results showed significant differences among diets in the physiological functions measured and suggested lower acceptability and digestibility of the commercial product. Negative SFG values were obtained for the commercial diet which indicates that it should be rejected for both Pinnid maintenance. The mixed diet showed improved physiological performance compared to the commercial diet, resulting in a higher SFG that had no significant differences with the control diet. However, in the long-term, the lower digestibility of the mixed diet compared to the control diet could lead to a deterioration of individuals' conditions and should be considered cautiously.
This work represents the first case study of SFG in Pinna spp. and provides fundamental data on dietary needs for the critically endangered species, P. nobilis.
生长可用能量的测量（生长范围，SFG）可用于双壳贝类，以便在短期实验中对个体状况进行长期预测。为了确定地中海海笋圈养的最佳条件，以粗海笋作为模式物种进行了一项SFG研究。研究了三种饲料，以测试活微藻和商业产品的可行性：i）基于等鞭金藻（t-ISO）的100%活微藻对照饲料，ii）基于产品“贝类饲料1800®”的100%商业微藻饲料，以及iii）等鞭金藻（t-ISO）和“贝类饲料1800®”的50/50%混合饲料。
SFG结果显示，在所测量的生理功能方面，不同饲料之间存在显著差异，表明商业产品的可接受性和消化率较低。商业饲料的SFG值为负，这表明对于海笋圈养而言，该饲料都应被摒弃。与商业饲料相比，混合饲料的生理性能有所改善，导致其SFG更高，与对照饲料无显著差异。然而，从长期来看，混合饲料与对照饲料相比消化率较低，可能会导致个体状况恶化，应谨慎考虑使用。
这项工作代表了海笋属SFG的首个案例研究，并为极度濒危物种——华贵海笋的饮食需求提供了基础数据。
