On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea)
Dexamine thea Boeck, 1861 (Amphipoda, Dexaminidae), the rare species never registered in the territorial waters of Ukraine, was first found in Laspi Bay, 40 km of Sevastopol (Crimea, Black Sea). 200 amphipods were examined and described. The pictures showing specific morphological characters are giv...
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Інститут зоології ім. І.І. Шмальгаузена НАН України
2010
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| Zitieren: | On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) / V.A. Grintsov // Вестник зоологии. — 2010. — Т. 44, № 3. — С. 281–283. — Бібліогр.: 1 назв. — англ. |
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irk-123456789-656942014-07-01T03:01:43Z On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) Grintsov, V.A. Краткие сообщения Dexamine thea Boeck, 1861 (Amphipoda, Dexaminidae), the rare species never registered in the territorial waters of Ukraine, was first found in Laspi Bay, 40 km of Sevastopol (Crimea, Black Sea). 200 amphipods were examined and described. The pictures showing specific morphological characters are given. Sex and size structure of the community and characteristics of the biotope are discussed. Исследованы особи Dexamine thea Boeck, 1861 (Amphipoda, Dexaminidae), ранее не отмечавшиеся в территориальных водах Украины. Вид зарегистрирован в районе б. Ласпи (Крым, ЮБК, 40 км от Севастополя). Исследовано 200 особей. Приведены рисунки характерных морфологических признаков. Получены характеристики поселений — половой состав, размерная структура. Приведены данные о биотопе обитания D. thea. 2010 Article On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) / V.A. Grintsov // Вестник зоологии. — 2010. — Т. 44, № 3. — С. 281–283. — Бібліогр.: 1 назв. — англ. 0084-5604 http://dspace.nbuv.gov.ua/handle/123456789/65694 595.3(262.5) en Вестник зоологии Інститут зоології ім. І.І. Шмальгаузена НАН України |
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Краткие сообщения Краткие сообщения Grintsov, V.A. On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) Вестник зоологии |
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Dexamine thea Boeck, 1861 (Amphipoda, Dexaminidae), the rare species never registered in the territorial waters of Ukraine, was first found in Laspi Bay, 40 km of Sevastopol (Crimea, Black Sea). 200 amphipods were examined and described. The pictures showing specific morphological characters are given. Sex and size structure of the community and characteristics of the biotope are discussed. |
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Article |
| author |
Grintsov, V.A. |
| author_facet |
Grintsov, V.A. |
| author_sort |
Grintsov, V.A. |
| title |
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) |
| title_short |
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) |
| title_full |
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) |
| title_fullStr |
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) |
| title_full_unstemmed |
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) |
| title_sort |
on finding dexamine thea (amphipoda, dexaminidae) in ukrainian territorial waters (crimea, black sea) |
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Інститут зоології ім. І.І. Шмальгаузена НАН України |
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2010 |
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Краткие сообщения |
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http://dspace.nbuv.gov.ua/handle/123456789/65694 |
| citation_txt |
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black Sea) / V.A. Grintsov // Вестник зоологии. — 2010. — Т. 44, № 3. — С. 281–283. — Бібліогр.: 1 назв. — англ. |
| series |
Вестник зоологии |
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2025-07-05T16:05:20Z |
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2025-07-05T16:05:20Z |
| _version_ |
1836823631643017216 |
| fulltext |
UDC 595.3(262.5)
ON FINDING DEXAMINE THEA (AMPHIPODA, DEXAMINIDAE)
IN THE UKRAINIAN TERRITORIAL WATERS
(CRIMEA, BLACK SEA)
V. A. Grintsov
The A. O. Kovalevsky Institute of Biology of the Southern Seas,
National Academy of Sciences of Ukraine,
2, Nakhimov Ave., Sevastopol, 99011 Ukraine
E-mail: VGrintsov@gmail.com
Received 6 October 2008
Accepted 25 March 2010
On Finding Dexamine thea (Amphipoda, Dexaminidae) in Ukrainian Territorial Waters (Crimea, Black
Sea). Grintsov V. A. — Dexamine thea Boeck, 1861 (Amphipoda, Dexaminidae), the rare species never
registered in the territorial waters of Ukraine, was first found in Laspi Bay, 40 km of Sevastopol
(Crimea, Black Sea). 200 amphipods were examined and described. The pictures showing specific
morphological characters are given. Sex and size structure of the community and characteristics of the
biotope are discussed.
Ke y wo r d s: amphipods, exotic species, epibiota.
Î íàõîæäåíèè Dexamine thea (Amphipoda, Dexaminidae) â òåððèòîðèàëüíûõ âîäàõ Óêðàèíû (Êðûì,
×åðíîå ìîðå). Ãðèíöîâ Â. À. — Èññëåäîâàíû îñîáè Dexamine thea Boeck, 1861 (Amphipoda,
Dexaminidae), ðàíåå íå îòìå÷àâøèåñÿ â òåððèòîðèàëüíûõ âîäàõ Óêðàèíû. Âèä çàðåãèñòðèðîâàí
â ðàéîíå á. Ëàñïè (Êðûì, ÞÁÊ, 40 êì îò Ñåâàñòîïîëÿ). Èññëåäîâàíî 200 îñîáåé. Ïðèâåäåíû
ðèñóíêè õàðàêòåðíûõ ìîðôîëîãè÷åñêèõ ïðèçíàêîâ. Ïîëó÷åíû õàðàêòåðèñòèêè ïîñåëåíèé —
ïîëîâîé ñîñòàâ, ðàçìåðíàÿ ñòðóêòóðà. Ïðèâåäåíû äàííûå î áèîòîïå îáèòàíèÿ D. thea.
Êëþ÷åâûå ñ ëîâ à: àìôèïîäû, âñåëåíöû, îáðàñòàíèå.
Introduction
For the first time about 40 amphipods of Dexamine thea Boeck, 1861 were found in April 2004 at the
depth 0.5–0 m in epibiota of the breakwater located in Laspi Âay, 40 km of Sevastopol (Crimea, Black Sea).
In March 2005, the number of amphipods of this species registered at the same site and depth increased to
more than 200. Dexamine thea was considered to be very rare in the Mediterranean Sea where these
amphipods are sometimes found in the night-time plankton. Biotope of D. thea has not been precisely
specified as yet; presumably, this species is a constituent part of algal biotopes (Bellan-Santini, 1982).
Characteristics of the community and morphological characters of D. thea from the territorial waters of
Ukraine are described for the first time in this paper.
Material and methods
On 22 March 2005, the pieces of the fouling community (5 samples) were scraped off from the 0.1 m2
area of the concrete breakwater at the depth 0.5–0 m using a scraper and fixed with 4% formaldehyde. In
the amphipod laboratory, D. thea were removed from the samples and placed into 75% alcohol.
Morphological characters were examined and amphipods measured under a MBS 9 binocular (8*4 and 8*7)
using a micrometer. Altogether, 54 individuals of D. thea were examined. Simultaneously, the numbers of
non-colonial invertebrates and the wet weight for all found macroorganisms incorporated into the studied
fouling community were determined.
Results and discussion
Morpho l o g y. Figure 1 shows that the recently found amphipods have every
morphological character typical of this species as described in Bellan — Santini, 1982.
Vestnik zoologii, 44(3): 281–283, 2010
282 V. A. Grintsov
Fig. 1. Morphological features of male and female from the Laspi Bay (Crimea, Sevastopol): a — gnathopod
I male; b — pereopod VII male, basis; c — pereopod 7 female, basis; d — pleon and urosome female; e —
pleon and urosome male; f — mandible male; g — uropod II male, h — maxilla 1, inner plate.
Ðèñ. 1. Ìîðôîëîãè÷åñêèå îñîáåííîñòè ñàìöà è ñàìêè D. thea èç áóõòû Ëàñïè (Êðûì, Ñåâàñòîïîëü):
a — ãíàòîïîäà I, ñàìåö; b — áàçèïîäèò ïåðåîïîäû VII ñàìöà; c — áàçèïîäèò ïåðåîïîäû VII ñàìêè;
d — ïëåîí è óðîñîì ñàìêè; e — ïëåîí è óðîñîì ñàìöà; f — ìàíäèáóëà ñàìöà; g — óðîïîä II ñàìöà;
h — ìàêñèëëà I, âíóòðåííÿÿ ëîïàñòü.
Fig. 2. Histogram of the size structure.
Ðèñ. 2. Ãèñòîãðàììà ðàçìåðíîé ñòðóêòóðû.
0
5
10
15
20
25
1 2 3 4
Lenght of specimen, mm
N
u
m
be
r
of
s
pe
ci
m
en
The key features relate to the structure of 1st gnathopod of males — a deep sinus on
the frontal part of propodus and the linear basipodite of 5th pereiopod (fig. 1, b).
Cha r a c t e r i s t i c s o f t h e c ommun i t y. The study has shown the prevalence
of females in the sex structure of the examined communities of D. thea. Among the 200
found amphipods only 16 (8% of the total number) were males, the rest were females
and juveniles. The portion of female amphipods with eggs is insignificant: among 48
females only 3 had eggs. The number of eggs is also small, averaging 9. In males max-
imum body length approximated 3.75 mm, in females — 4.25 mm. It is noteworthy that
in the Black Sea male amphipods of D. thea are smaller than in the Mediterranean:
according to Bellan-Santini (1982), the maximum body length was 5 mm. The size
structure of the studied samples is given in figure 2. As the histogram shows, amphipods
2 to 4 mm long, i. e., of medium size group, prevail in the community. The number of
juvenile amphipods is as inconsiderable as 8, that is 15% of the total abundance.
B i o t o p e. The fouling community in which D. thea were found is a complex
supraspecies system (the fraction of macroorganisms alone is represented by
120 species). Most abundant are bivalved molluscs, Mytilus galloprovincialis Lamark,
1819 and Mytilaster lineatus (Gmelin, 1790), and macrophytes. The investigated com-
munity dwells in Laspi Bay, in the locality that the breakwater protects from the impact
of sea waves.
Bellan-Santini D. Genus Dexamine Leach, 1814. The Amphipoda of the Mediterranean // Memoires de`l
institut oceanographique. — Monaco, 1982. — Vol. 13, Part 1. — P. 220–225.
283On finding Dexamine thea (Amphipoda, Dexaminidae)…
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