Table 3 in Delphinid brain development from neonate to adulthood with comparisons to other cetaceans and artiodactyls

Table 3. Gestation and brain size. The predicted gestation period was derived by applying the Sacher and Staffeldt formula and using our brain mass data. Sheep (O. aries), cows (B. taurus), giraffes (G. camelopardalis), and hippopotamuses (H. amphibius) were included in the table to compare cetaceans to other members of the Cetartiodactyla taxonomic order. Humans (H. sapiens) were also included for comparison. Cetaceans appear to have similar neonatal/adult brain mass ratios compared to other animals of the Cetartiodactlya order. Sources for the published gestation durations and cetacean brain masses can be found in Table S1.
PublishedPredictedTaxonomic familyNeonatalAdult brainNeonate/gestationgestationGenus speciesbrain mass (g)mass (g)adult (%)(days)(days)DelphinidaeC. commersonii37078347.3334324D. delphis43071560.2363359G. griseus7962,13237.3410386L. acutus7331,28557365401L. obliquidens5231,19843.6356352O. orca S. attenuata S. longirostris3,006 353 2476,642 711 54145.3 49.6 45.6553 — —566 304a 286aS. bredanensis7061,45448.6378388T. truncatus6851,55044.2376377MonodontidaeD. leucas9382,08744.9456414PhocoenidaeP. phocoena24250647.7316266P. dalli27080333.6334282PhyseteridaeP. macrocephalus3,3087,69343547582PontoporiidaeP. blainvillei154.9223.969.2319271ZiphiidaeM. europaeus9711,68057.8——BalaenopteridaeB. physalus2,6406,71839.3342537Bovidae B. taurus O. aries199b 69456b 130d43.6 53278c 150e270 208Giraffidae G. camelopardalis428f537f79.7459c363Hippopotamidae H. amphibius195b590b33.1240e258Hominidae H. sapiens380g1,400b27280e324
a Perrin et al. (1977).
b Sacher and Staffeldt (1974).
c Kiltie (1982).
d Minervini et al. (2016).
e Hayssen et al. (1993).
f Gra¨ıc et al. (2017).
g Blinkov and Glezer (1968).