Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triiodothyronine suppresses humoral immunity but not T-cell-mediated
  immune response in incubating female eiders (Somateria mollissima)   Immunity is believed to share limited resources with other physiological
functions and this may partly account for the fitness costs of reproduction.
Previous studies have shown that the acquired immunity of female common eiders
(Somateria mollissima) is suppressed during the incubation fast. To save
energy, triiodothyronine (T3) is adaptively decreased during fasting in most
bird species, despite T3 levels are maintained throughout incubation in female
eiders. However, the relationship between thyroid hormones and the immune
system is not fully understood. The current study aimed to determine the
endocrine mechanisms that underlie immunosuppression in incubating female
eiders. ...

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc