  A general construction of Knop creates a symmetric monoidal category
$\mathcal{T}(\mathcal{A},\delta)$ from any regular category $\mathcal{A}$ and a
fixed degree function $\delta$. A special case of this construction are the
Deligne categories $\underline{\operatorname{Rep}}(S_t)$ and
$\underline{\operatorname{Rep}}(GL_t(\mathbb{F}_q))$. We discuss when a functor
$F:\mathcal{A} \to \mathcal{A}'$ between regular categories induces a symmetric
monoidal functor $\mathcal{T}(\mathcal{A},\delta) \to
\mathcal{T}(\mathcal{A}',\delta')$. We then give a criterion when a pair of
adjoint functors between two regular categories $\mathcal{A}, \ \mathcal{A}'$
lifts to a pair of adjoint functors between $\mathcal{T}(\mathcal{A},\delta)$
and $\mathcal{T}(\mathcal{A}',\delta')$.
