As members of the phylum Chordata, fish share certain features with other vertebrates.
Shouldn't the rationale for not ending the lives of neurologically simpler animals, such as fish, share grounds with the rationale for not terminating embryos?
Small laboratory fish share many anatomical and histological characteristics with other vertebrates, yet can be maintained in large numbers at low cost for lifetime studies.
However, as discussed earlier [ 60], both mammals and fish share the CYP1 subfamilies CYP1A and CYP1B.
Such phenotypic differences are expected to have a strong genetic component if the fish share the same environmental history.
The cerebella in mammals and fish share both a basic histological architecture and neural circuits [ 6- 11].
Ray-finned fish share the common trait of using C24 bile acids with snakes, many lizards, most birds, and most mammals [ 9].
The suite seems to reflect something about the process of domestication per se, a conclusion strengthened by the finding that domesticated birds and even fish share some components of this spectrum of traits.
NAKA fails to complement armor plate changes when crossed with a typical Canadian low-plated population (Schluter et al., 2004), suggesting that NAKA and other low-plated fish share a modification in the same major locus.
According to the phylogenetic reconstruction, subtypes of the histone variant H2A.Z isolated from carp, together with the group comprising H2A.Z variants belonging to the Actinopterygii class of fish, share a monophyletic origin.
In addition, molecular approaches studying changes in gene expression have shown that the feminizing effects of estrogens and antiandrogens in fish share both common and distinct gene pathways (Filby et al. 2007a, 2007b).
