Project 1270: L. E. Wilson,K. Chin. 2014. Comparative osteohistology of Hesperornis with reference to pygoscelid penguins: the effects of climate and behaviour on avian bone microstructure. Royal Society Open Science. 1.
Specimen: † Hesperornis sp. (NU/VF:286)

Abstract

The broad biogeographic distribution of Hesperornis fossils in Late Cretaceous Western Interior Seaway deposits has prompted questions about whether they endured polar winters or migrated between mid- and high latitudes. Here, we compare microstructures of hesperornithiform long bones from Kansas and the Arctic to investigate whether migration or Late Cretaceous polar climate affected bone growth. We also examine modern penguin bones to determine how migration and climate may influence bone growth in birds with known behaviours. Histological analysis of hesperornithiform samples reveals continuous bone deposition throughout the cortex, plus an outer circumferential layer in adults. No cyclic growth marks, zonation or differences in vasculature are apparent in the Hesperornis specimens. Comparatively, migratory Adélie and chinstrap penguin bones show no zonation or changes in microstructure, suggesting that migration is not necessarily recorded in avian bone microstructure. Non-migratory gentoos show evidence of rapid bone growth possibly associated with increased chick growth rates in high-latitude populations and large body size. The absence of histological evidence for migration in extinct Hesperornis and extant pygoscelid penguins may reflect that these birds reached skeletal maturity before migration or overwintering. This underscores the challenges of using bone microstructure to infer the effects of behaviour and climate on avian growth.


Read the article »

Article DOI: 10.1098/rsos.140245

Project DOI: 10.7934/P1270, http://dx.doi.org/10.7934/P1270
This project contains
  • 55 Media
  • 10 Folios
  • 5 Taxa
  • 7 Specimens
Total size of project's media files: 676 MB

Download Project SDD File
Currently Viewing:
MorphoBank Project 1270

    This research
    supported by



    Members

    member name taxa specimens media media
    notes
    Laura Wilson
    Project Administrator
    Last logged in 11/20/14
    575554


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views37516
    Project overview3270
    Media views24451Media search (4060 views); M346035 (351 views); M345965 (368 views); M346030 (368 views); M340320 (372 views); M345926 (330 views); M345940 (348 views); M345906 (394 views); M345942 (364 views); M345966 (347 views); M346011 (363 views); M346013 (365 views); M345931 (400 views); M346037 (374 views); M340322 (352 views); M346032 (334 views); M346041 (382 views); M345904 (363 views); M345967 (329 views); M345945 (374 views); M346014 (389 views); M346033 (369 views); M340321 (367 views); M340318 (370 views); M345943 (362 views); M345944 (381 views); M346012 (359 views); M345930 (427 views); M345932 (365 views); M346029 (400 views); M340748 (348 views); M345941 (335 views); M346039 (387 views); M340323 (370 views); M345903 (363 views); M345905 (374 views); M345948 (380 views); M345927 (380 views); M346036 (346 views); M346015 (375 views); M340324 (362 views); M345946 (310 views); M345929 (392 views); M346040 (376 views); M346028 (370 views); M340743 (408 views); M340747 (447 views); M346034 (355 views); M340319 (379 views); M346042 (388 views); M345947 (357 views); M346031 (389 views); M346038 (396 views); M340746 (330 views); M345968 (394 views); M345928 (413 views);
    Taxon list2013
    Specimen list3774
    Folio views4008Folio list (753 views); NUVF 286 (327 views); UNCW B980 - Femur (345 views); UCM 104148 Tibiotarsus (311 views); UNCW B980 - Tibiotarsus (299 views); YPM 1489 (327 views); UNCW B963 - Tibiotarsus (314 views); UNCW B963 - Femur (310 views); YPM 1201 (355 views); UCM 104148 Femur (330 views); YPM 1491 (337 views);




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project193
    Project downloads170
    Media downloads23M340743 (3 downloads); M345903 (1 download); M345927 (2 downloads); M345944 (1 download); M345945 (1 download); M345947 (1 download); M345965 (1 download); M346011 (1 download); M345968 (1 download); M346028 (1 download); M346040 (1 download); M346041 (1 download); M346042 (1 download); M340746 (1 download); M340318 (5 downloads); M340319 (1 download);