Abstract：
Studies on the anatomical and pathological characteristics of ribs in farmed Atlantic salmon (Salmo salar L.) are warranted due to their possible association with red and melanized focal changes (RFC and MFC) in the fillet, a major quality and animal welfare concern. In this work, we provide an anatomical description of ribs based on radiographical and histological analyses. We also address various pathological rib changes and their association to RFC and MFC. In total, 129 fish were investigated; captured wild (n = 10) and hatchery reared (n = 119) Atlantic salmon (3.5-6.1 kg). The fish were selected based on the macroscopic presence of RFC, MFC or no changes (controls). Radiographic results revealed costal abnormalities in all fish groups. By histological investigations of the variations herein, our results provide new insight into the anatomical characteristics including vascularization within the ribs; a potential site for haemorrhage following costal fractures. Costal fractures were detected by radiology in 40 of 129 samples (RFC: 38.4%, MFC: 47.2%, controls: 9.5 %). A statistically significant association was found between costal fractures and red (p = 0.007) and melanized changes (p = 0.000). However, red and melanized changes were also observed in samples with no costal fractures (n = 45), indicating that also other factors influence the development of RFC/MFC.
摘要：
对养殖大西洋鲑鱼（SalmosalarL.）肋骨的解剖学和病理学特征进行研究是有必要的，因为它们可能与鱼片中的红色和黑化病灶变化（RFC和MFC）有关，主要质量和动物福利关注。在这项工作中,我们根据影像学和组织学分析提供肋骨的解剖学描述。我们还讨论了各种病理性肋骨变化及其与RFC和MFC的关联。总的来说,调查了129条鱼；捕获的野生（n=10）和孵化场饲养的（n=119）大西洋鲑鱼（3.5-6.1千克）。根据RFC的宏观存在选择鱼，MFC或无更改（控件）。射线照相结果显示所有鱼群的肋骨异常。通过对本文变异的组织学研究，我们的研究结果为包括肋骨内血管形成在内的解剖学特征提供了新的见解;肋骨骨折后出血的潜在部位.通过放射学在129个样本中的40个样本中检测到肋骨骨折（RFC：38.4％，MFC：47.2%，控制：9.5%）。在肋部骨折与红色（p=0.007）和黑化变化（p=0.000）之间发现了统计学上的显着关联。然而,在没有肋骨骨折的样品中也观察到红色和黑化的变化（n=45），表明其他因素也会影响RFC/MFC的发展。
