[Wild is not really wild: brain weight of wild domestic mammals].

Domestication leads to the reduction of brain weight, decreases reach from 8.1% in laboratory rats up to 33.6% in domesticated pigs.

[Are zoo Przewalski horses domesticated horses?].

Analysed were the brain case capacities and brain weights of wild przewalski horses, przewalski horses from zoological gardens and domesticated horses. Domesticated horses have about 14% less brain case capacity and 16% less brain weight than wild przewalski horses. Przewalski horses from zoological gardens also have about 14% less brain capacity than wild przewalski horses.

Domestication and plasticity of brain organization in mallards (Anas platyrhynchos).

The sizes and histological differentiation of structures in the central nervous system of wild and domestic ducks were compared using allometric methods. Whole brain volume is 14.3% less in domestic ducks than in wild birds, and the size of certain brain structures is more variable in domestic ducks than in the wild birds.

Volumetric analysis of brain structures, especially of the visual system in wild and domestic turkeys (Meleagris gallopavo).

The total brain volume, the volumes of the main brain subdivisions and regions belonging to the visual system of wild and domestic turkeys of either sex were measured and related to body weight. Using allometric methods sex-related reductions in brain size from wild to domesticated state was examined. Male domestic turkeys have 29% and female domestic turkeys 24% less brain volume.

Forebrain specialization and the olfactory system in anseriform birds. An architectonic and tracing study.

In anseriform birds the mediodorsal part of the rostral forebrain is covered by a corticoid (= layered) structure, establishing a unique feature of this avian group since in other birds the non-cortical accessory or dorsal hyperstriatum occupies the corresponding surface area of the hemisphere. The efferents of the olfactory bulb are shown to reach this region, which thus can be identified as a heavily enlarged retrobulbar area. The large expansion of this olfactory representation may indicate an important biological function.