[MARMAM] New Publication: Morphological structure of the aortic wall in three Delphinid species with shallow or intermediate diving habits: Evidence for diving adaptation

Yara Bernaldo de Quirós Miranda yarabdq at gmail.com
Wed Mar 18 05:17:08 PDT 2020


Dear Colleagues,



We are glad to announce a new publication on the “Morphological structure
of the aortic wall in three Delphinid species with shallow or intermediate
diving habits: Evidence

for diving adaptation”



ABSTRACT

Some modifications in the vascular system of marine mammals provide
adaptive advantages for diving. This study analyses the organisation of the
aortic wall in dolphins, observing artery changes in volume and blood
pressure for diving behaviour. Samples of three aortic segments (ascending,
thoracic and abdominal) of three dolphin species were processed for
histological and morphometric studies. The three dolphin species used,
striped dolphin (Stenella coeruleoalba), Atlantic spotted dolphin (Stenella
frontalis) and common dolphin (Delphinus delphis), have shallow or
intermediate diving habits. Our results indicated that the components of
the aortic wall of the dolphins had different dispositions in the three
selected segments. The aortic wall decreased in thickness along its length
due to a loss of the lamellar units in the tunica media and a thinning of
the main elements of the lamellar units along the artery. The life stage
had little influence on the thickness of the aortic wall except for the
ascending aorta. The weight, body length, species or sex of the specimen
did not significantly influence the thickness of the wall or the lamellar
units. In summary, the histological and morphometric aortic structure in
dolphins, in relation to the studied parameters, seems to be similar to
that previously described of terrestrial mammals such as pigs, except for a
larger difference in the proportion of lamellar units between the ascending
and thoracic segments.



Link to the full manuscript:

*https://onlinelibrary.wiley.com/doi/abs/10.1002/jmor.21105
<https://onlinelibrary.wiley.com/doi/abs/10.1002/jmor.21105>*





Regards,

Prof. Antonio Fernández

PhD Yara Bernaldo de Quirós
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