The ontogenetic origins of skull shape disparity in the Triturus cristatus group
2014
Tip dokumenta:
Članak u časopisu (Objavljena verzija)
,
© 2014 Wiley Periodicals, Inc.
Metapodaci
Prikaz svih podataka o dokumentuApstrakt:
Comparative studies of ontogenies of closely related species provide
insights into the mechanisms responsible for morphological
diversification. Using geometric morphometrics, we investigated the
ontogenetic dynamics of postlarval skull shape and disparity in three
closely related crested newt species. The skull shapes of juveniles just
after metamorphosis (hereafter metamorphs) and adult individuals were
sampled by landmark configurations that describe the shape of the dorsal
and ventral side of the newt skull, and analyzed separately. The three
species differ in skull size and shape in metamorphs and adults. The
ontogenies of dorsal and ventral skull differ in the orientation but not
lengths of the ontogenetic trajectories. The disparity of dorsal skull
shape increases over ontogeny, but that of ventral skull shape does not.
Thus, modifications of ontogenetic trajectories can, but need not,
increase the disparity of shape. In species with biphasic life-cycles,
when ontogenetic trajectories for one stage can be decoupled from those
of another, increases and decreases in disparity are feasible, but our
results show that they need not occur.
Izvor:
Evolution & Development, 2014, 16, 5, 306-317Finansiranje / projekti:
- Diverzitet vodozemaca i gmizavaca Balkana: evolucioni aspekti i konzervacija (RS-MESTD-Basic Research (BR or ON)-173043)
DOI: 10.1111/ede.12093
ISSN: 1520-541X