Bland John M, Ardoin Ryan, Li Carissa H, Bechtel Peter J
Southern Regional Research Center, ARS, USDA, 1100 Allen Toussaint Blvd., New Orleans, LA 70124, USA.
Foods. 2022 Jun 24;11(13):1875. doi: 10.3390/foods11131875.
An analysis of instrumental texture differences between channel (Ictalurus punctatus) and hybrid (female channel × male blue, I. furcatus) catfish fillets is presented. Factors including cold-storage type (fresh, frozen, or individually quick frozen (IQF)) and gender were included in the comparisons. Texture was measured at eight positions per fillet by a texture profile analysis (TPA) method that provided seven texture attributes: firmness, toughness, cohesiveness, adhesiveness, chewiness, resilience, and springiness, plus the thickness of the fillets (238 total). All attributes except adhesiveness were found to be statistically different (p < 0.05) between channel and hybrid fillets, with channels having the highest value in each attribute. When cold-storage type was included in the analysis, channels still produced the highest attribute values, but the number of attributes differed with firmness, toughness, and chewiness most associated with the differences in the type of catfish, while the other attributes were affected by cold-storage type. Thickness was found to be a strong covariant to some of the texture attributes, especially toughness, but the determination of difference between channels and hybrids was not affected and TPA profiles provided high levels of differentiation between catfish types.
本文对沟鲶（斑点叉尾鮰）和杂交鲶（雌性沟鲶×雄性蓝鲶）鱼片的仪器质地差异进行了分析。比较中纳入了冷藏类型（新鲜、冷冻或单体速冻（IQF））和性别等因素。通过质地剖面分析（TPA）方法在每片鱼片的八个位置测量质地，该方法提供了七个质地属性：硬度、韧性、内聚性、粘附性、咀嚼性、弹性和回弹性，以及鱼片的厚度（共238个数据）。除粘附性外，所有属性在沟鲶和杂交鲶鱼片之间均存在统计学差异（p < 0.05），沟鲶在每个属性上的值最高。当将冷藏类型纳入分析时，沟鲶仍产生最高的属性值，但属性数量因硬度、韧性和咀嚼性而有所不同，这些属性与鲶鱼类型差异最为相关，而其他属性受冷藏类型影响。发现厚度是一些质地属性的强协变量，尤其是韧性，但沟鲶和杂交鲶之间差异的判定不受影响，TPA曲线在鲶鱼类型之间提供了高度的区分度。
