Cephalic heterochronies in domestic rabbits: a first study
MetadataShow full item record
Heterochrony is defined as the evolutionary changes in the timing of development, presenting a unified view of neoteny, recapitulation, paedogenesis, retardation, progenesis, etc. In order to detect processes of heterochrony and differentiate them, 291 fresh corpses of domestic rabbits of different
purposes («belier» type n=73, «toy» type n=112, meat type n=71) were studied, from which facial and cephalic lengths were obtained, and compared them with 35 wild rabbits (Oryctolagus cuniculus). The regression lines of facial length versus the cranial length appeared homogeneous among types, but slopes showed statistically different values and, in all cases, allometric coefficients exceeding 1. This would be interpreted as a clear expression of hypomorphoses for toy rabbits (slope was lower than that for wilds), but hypermorphosis for meat animals (slope was higher than that for wilds). Wild rabbit, on the other hand, presented a development with a sudden stop, due to their lower body weight and hence shorter cephalic growth.
Is part ofRevista de Investigaciones Veterinarias del Perú, 2020, vol. 31, num. 2, e16178, p. 1-7
Except where otherwise noted, this item's license is described as cc-by-nc-sa (c) Parés Casanova, Pere-Miquel et al., 2020
Showing items related by title, author, creator and subject.
Parés Casanova, Pere-Miquel; Sofiane, Khelil; Medina, Anabel (Universidad Nacional, Costa Rica, 2018-06-28)The word 'allometry' refers to the relative growth of a biological structure to other(s) or to the entire body, and encompasses conformational changes due to size change. When growth is the same among studied traits, it ...
Skull dorsal asymmetries between three different rabbit types signals stress in paedomorpic animals Parés Casanova, Pere-Miquel; Medina, Anabel; Sofiane, Khelil (World Scientific and Engineering Academy and Society (WSEAS), 2019-09-01)Fluctuating asymmetry (FA) is frequently considered a consequence of developmental instability (DI), defined as the inability of an organism to adjust its development to an ideal pattern. The underlying hypothesis is that, ...
Parés Casanova, Pere-Miquel (OMICS International, 2018-06-05)'Sexual dimorphism' defnes differences in dimensions and proportions between males and females and in case it appears, researches must be done to see if they are the result of ontogenetic scaling, heterochronic processes ...