International Journal of Marine Science 2015, Vol.5, No.19, 1-10
5
Theophane rocks’ biocoenosis. The presence of
numerous transitional variants in the color of the male
gonads Rapana does not allow estimating the
proportion of individuals of each base color concretely
in number. You can only talk about a distinct change
in the original orange to brown and the predominance
of the last color on the current stage of development of
individual populations. Color palette shown in Figure 8
reflects the current ratio for 2014 in Blue bay.
Figure 8
R. venosa
males’ soft bodies of Blue bay 2012-14
sampling with indication of individual age and the shell length:
A – 3 years, 51.5mm, B – 3, years 51.0mm, C – 3 years,
51.1mm, D – 3 years, 47.0mm, E – 4 years, 55.1mm, F – 4
years, 53.5mm, G – 4 years, 43.2mm, H – years 5, 51.2mm, I –
5 years, 52.2mm, J – 5 years, 58.8mm, K – 5 years, 52.0mm, L –
6 years, 56.2mm, M – 6 years, 39.6mm, N – 7 years, 43.0mm,
O – 6 years, 55.0mm, P – 7 years, 71.1mm, Q – 8 years,
64.1mm, R – 8 years, 45.5mm, S – 9 years, 49.9mm
An obvious connection color gonad of individuals
with shell color is not established. Although
previously known differences in the prevalence of
light-colored individuals inhabiting sandy bottom in
comparison with on rock living ones (Savini et al,
2004, Bondarev, 2010) can be linked to a
predominance of brown gonads just at
R. venosa
of
sandy bays. The weakening of the surface shell color
up to albinism is often associated with age also
correlated with age-connected increasing the intensity
of brown color gonads noted above. It is possible that
the lack of melanin in the shell inversely related to its
large number of soft tissue.
Marked by a clear link between
R. venosa
male
gonads color intensity and color of the digestive gland.
This connection is direct - the darker the gonads, the
more intense the color of the digestive gland. And at
gerontic individuals of “brown color line” the
digestive gland can almost merge with the color
black-brown gonads (Figures 6K, L). In females
between the color of the gonad and digestive gland so
explicit dependence is not established, but noted that
more young individuals are usually lighter in color of
the digestive gland.
2 Discussion
Pay attention to the description of the male gonad
color for the Black Sea by various authors in
chronological order. Light- or dark- orange color
(Chuhchin, 1961a, 1970, 1984), red-brown (Micu et
al., 2009), brownish (Saglam and Duzgunes, 2014)
and from beige to dark brown almost black in color
according to our study. Definitely we deal with a trend
change color spectrum gonads though the original and
transitional color options also take place in
contemporary populations.
Shown above dependence of the amplification in the
color intensity of the gonad and digestive gland of
males from the individuals’ age in common with data
of age-related changes color vas deferens: "Seminal
duct is a whitish winding tube ... The old Rapana vas
deferens becomes dark brown" (Chuhchin, 1961a).
Probably is talk about the accumulation of pigments in
the generative tissues with increasing age. The same
can be said of the digestive gland.
Stained tissues depend on the composition and amount
of pigments. In 2009 studies were conducted on the
number and composition of carotenoids in the tissues
of
R. venosa
. Thin layer chromatography (TLC)
chromatograms fractions were labeled with the
following pigments and their mobilities (Rf): 1- yellow
(0.88), 2- pink and yellow (0.53 - 0.48), 3- pink (0.35),
