Evaluation of immune and stress status in harbour porpoises (Phocoena phocoena): can hormones and mRNA expression levels serve as indicators to assess stress?

When separating the group of rehabilitated porpoises and comparing the first measurement after arrival in the facility with the last one obtained before release, marginally significant differences (p = 0.052) appear between the first value close to the range of the free-ranging animals and the last value similar to the range found in animals in human care (Figure 3 b).

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Although no significant differences were found between groups, a clear trend for lowest numbers of TNFα transcripts in free-ranging porpoises and for highest numbers in porpoises in human care was apparent.

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