Fig 1.
Diagrams of Heniochus varius illustrating their cranial hump and horn structures.
The first two images show sexual dimorphism between the female (A) and male (B) within a size assorted breeding pair. (C) Shows the size measurements taken. (D) Shows an X-ray image illustrating the internal structures of the hump and horn features.
Fig 2.
(A) Length vs Age and (B) Weigth vs Length relationships for 76 individual Heniochus varius (25 pairs as well as 26 single individuals where the other member of the pair was not caught). Males are dark blue and females are gold.
Fig 3.
Correlations between males and females for: (A) age, (B) total length, (C) raw mass, and (D) raw body depth, in 25 pairs of Heniochus varius. Residual mass (E) and body depth (F) relationships are also shown, after accounting for relationships in the raw metrics to total length. Each point represents a pair, dotted lines indicates line of equality or the expected point if the male and female had an identical metrics, and solid lines represent linear estimates for statistically significant correlations (alpha = 0.05).
Fig 4.
(A) Differences in hump and horn lengths standardized by total body length, for males and females in 25 pairs of Heniochus varius. Within-pair intersex comparisons of residual (B) hump and (C) horn length, after accounting for relationships to total length. Dotted lines are lines of equidistance.
Fig 5.
Sex differences in the relationships between total length and (A) hump length, and (B) horn length of 76 Heniochus varius individuals sampled in Kimbe Bay, Papua New Guinea. Females are gold and males are dark blue.