Share

IIR document

Postmortem changes in fresh characteristics in trout (Salmo trutta) and carp (Cyprinus cario).

Evolution post mortem de quelques caractéristiques de la chair de truite fario (Salmo trutta) et de carpe (Cyprinus carpio).

Author(s) : LAROCHE L., BONNET S., FAUCONNEAU B., MARCEL J.

Summary

Brightness decreased up to a minimum observed between 10 to 48 h in carp fillet, while it increased regularly in trout fillet. In carp from which fillets were removed immediately after fishing, the length of fillet increased slightly during the first few minutes of storage. This is not the case in trout from which the fillet was removed after evisceration. Length of fillet then decreased from 1h30 to 12-24 h postmortem up to 95% of initial length in carp and 80% of initial length in trout. After these minimum values, fillet length increased again up to the initial value in carp and up to 95% of the initial value in trout within seven days. Initial pH was low in carp (6.75) and trout (6.45) and was stable during 2 h postmortem. Then it decreased up to a minimum of 6.25 in carp and 6.15 in trout observed 24 to 48 h postmortem. Finally pH increased again slightly in both species. Initial lactate content in fillet was relatively high (30% of glycogen content in equivalent lactate), and this could explain the low initial pH. Lactate was probably produced during handling and slaughtering of fish. Glycogen content after seven days of storage on ice was not negligible both in trout and carp. Thus, glycogen content would not be the limiting factor explaining the relatively high minimum pH observed generally in fish, as compared to meat.

Available documents

Format PDF

Pages: 1996-2

This document is to be digitised and will be available within 10 working days

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Evolution post mortem de quelques caractéristiques de la chair de truite fario (Salmo trutta) et de carpe (Cyprinus carpio).
  • Record ID : 1997-0962
  • Languages: French
  • Source: Refrigeration and Aquaculture.
  • Publication date: 1996/03/20
  • Document available for consultation in the library of the IIR headquarters only.

Links


See other articles from the proceedings (55)
See the conference proceedings

Indexing