[MARMAM] New Publication: Sexual dimorphism in long-beaked common dolphins (Delphinus capensis)

Sibusisiwe Tele (Ngqulana) ngqulanas at gmail.com
Mon Aug 21 23:53:16 PDT 2017

Dear All,

My co-authors and I are pleased to announce the recent publication of the
following article in the Journal of Mammalogy:

*Sexual dimorphism in long-beaked common dolphins (Delphinus capensis) from
KwaZulu-Natal, South Africa*
Sibusisiwe G Ngqulana, G. J. Greg Hofmeyr, Stephanie Plön



We examined external morphometric parameters in incidentally caught
long-beaked common dolphins (Delphinus capensis) from the east coast of
South Africa for evidence of sexual dimorphism. We evaluated sexual
dimorphism and allometric growth in 26 external body measurements from 211
individuals and assessed size and shape dimorphism. Most characteristics
analyzed showed a negative allometric relationship to total body length for
both males and females. Twenty-one measurements showed significant
differences between the sexes. Among these were the 3 girth measurements,
the length of the dorsal fin base, the distance between the tip of the
upper jaw to the midpoint of the umbilicus, and the distance between the
tip of the upper jaw to the center of the anus. Fourteen of the 26
characteristics analyzed showed significant differences in body shape
between the sexes. Our results indicated that moderate sexual dimorphism is
present in long-beaked common dolphins from this region, with males being
both significantly longer and more robust than females. Sexual dimorphism
in this species may be related to their mating or foraging strategies.

For any questions, please feel free to contact me at ngqulanas at gmail.com

Kind Regards,
Sibusisiwe Tele (Ngqulana)
Department of Zoology

Nelson Mandela University

South Campus

PO Box 77000

Port Elizabeth


South Africa

Phone +27 41 5042 710

Fax +27 41 5042317

Cell no.: +27 79 8271160
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