摘要
几种淡水养殖鱼活杀死后达到全僵的时间（Ｔｒ）同其生活时的水温（ｔ）之间存在着良好的负相关，即ｌｎＴｒ＝５．０３７—０．１１６５ｔ（ｒ＝－０．９２３６），显示出明显的季节差异。死后僵硬还受致死方法影响，表现为活杀鱼的僵硬时间长，挣扎死的短，半死的近于二者之间。据此，讨论了在温度低、僵硬期长的季节，采用冰藏或１０℃以下常温条件下活杀鲜鱼流通上市、拓宽淡水养殖鱼类流通渠道的可能性及活杀鲜鱼的鲜度质量指标等问题。
Seasonal variations in rigor morns of several cultured freshwaterfish, bighead, silver carp and grass carp, were studied in this paper. The experimental results showed that the variations were markedly evident. These threespecies of fish stored at 0℃ reached full rigor state after 2 to 16 hrs (mostly 6 to10 hrs) in May to July and in October, but in the months from January to Marchafter 50 to 100 hrs (about 2to 4 days). However,in the months of April and November, the time after death to full rigor beginning were 10 to 60 hrs. It was foundthat a good negative correlation existed between the seasonal temperature of pondwater and the duration of full rigor. The correlation coefficient was - 0.9236 (P0.01). This correlationship showed that the duration of rigor morns was dependent on the temperature of pond water where the fish cultured. Rigor mornsalso varied with different physiological states before death. The duration of rigormorns of bighead killed alive was much longer than that of fish dead after struggling. The difference of the duration of rigor morns between the species of fishwas not so evident. Therefore, besides distributing of live fish a new distributionway of cultured freshwater fish was suggested,namely the fish killed alive mightbe handled and distributed with ice or without ice stored if the seasonal temperature was less than 10℃,and within a longer time than that for distributing of livefish. The quality criteria and freshness index for freshwater fish were also discussed in the paper.
出处
《水产学报》
CAS
CSCD
北大核心
1994年第1期1-7,共7页
Journal of Fisheries of China
基金
国家自然科学基金
关键词
鳙
鲢
草鱼
死后僵硬
季节变化
rigor morns of fish
pre-rigor
full rigor
seasonal variation
bighead
silver carp
grass carp
