First report of Ceratomyxa scorpaeni (Cnidaria: Myxozoa) from Scorpaena porcus in the Black Sea

Zootaxa ◽  
2021 ◽  
Vol 5067 (3) ◽  
pp. 429-438
Author(s):  
SEVİLAY OKKAY ◽  
C. TOLGA GÜRKANLI ◽  
YILMAZ ÇİFTÇİ ◽  
VİOLETTA YURAKHNO ◽  
AHMET ÖZER

Members of the class Myxosporea Bütschli, 1881 have a cosmopolitan distribution in a wide variety of fish species worldwide. In the present study, the black scorpionfish Scorpaena porcus collected from the Sinop coasts of the Black Sea was investigated for myxosporean parasites using both conventional and molecular methods in the period between September 2015 and August 2019. Using morphological and morphometric data, the myxosporean parasite Ceratomyxa scorpaeni Garbouj, Rangel, Castro, Hmissi, Santos, Bahri, 2016 was identified in the gall bladder of host fish. Molecular analysis of the 18S rDNA gene confirmed the identity of this parasite as C. scorpaeni. This is the first report of its occurrence in the Black Sea.  

2014 ◽  
Vol 49 (2) ◽  
pp. 57-60 ◽  
Author(s):  
Ahmet ^|^Ouml;zer ◽  
T^|^uuml;rkay ^|^Ouml;zt^|^uuml;rk ◽  
Hakan ^|^Ouml;zkan ◽  
Arzu ^|^Ccedil;am

2020 ◽  
Vol 175 ◽  
pp. 02014
Author(s):  
Anna Kazarnikova ◽  
Tatyana Strigakova ◽  
Evgeny Bortnikov ◽  
Ovkar Byadgi ◽  
Marco Galeotti ◽  
...  

Flathead grey mullet, Mugil cephalus, with mass whitish cystlike plasmodia on their scales were collected at Kerchensky preglass of the Black Sea in 2015. The prevalence of infected fish varied from 15% in spring, reached 100% in summer, and declined to 2.5% in autumn. No fish mortality was detected. The spores were oval in frontal view, tapering to a blunt apex. Two unequal polar capsules were pyriform and extended over the anterior half of spore. Spores were 8.2±0.03 µm (7.9-8.4) long, 5.9±0.23 µm (5.2-7.3) wide, and 4.4±0.17 µm (4.0-4.7) thick. Two pyriform and unequal polar capsules were observed (4.0±0.07 µm (3.3-4.5) long, and 1.5±0.24 µm (1.1-1.8) wide). The investigation of nucleotide sequences of the 18S rDNA gene of the myxosporean spores from scales with universal primer А (5′-ACCTGGTTGATCCTGCCAGT-3′) and В (5′-TGATCCTTCTGCAGGTTCACCTAC-3′) showed 100% identity with episquamalis, and 99 % with M. bizerti, M. ichkeulensis, M. spinacurvata and Myxobolus sp. previously detected in mullets. The results obtained from the present study reveal that M. episquamalis, found on the scales of M. cephalus from Kerchensky preglass of the Black Sea, is new record for Russian waters.


2021 ◽  
Vol 42 (8) ◽  
pp. 55-58
Author(s):  
Tihomir Stefanov

One adult specimen of small red scorpionfish Scorpaena notata Rafinesque, 1810 was found in the ichthyological collections of the National Museum of Natural History in Sofia, Bulgaria. The specimen has been caught on 12 May 1926 in Black Sea near the town of Burgas and labelled as Scorpaena porcus. This is the first finding of the species along the Bulgarian Black Sea coast and the oldest record in the Black Sea.


2018 ◽  
Vol 3 (4) ◽  
pp. 51-63
Author(s):  
L. V. Malakhova ◽  
E. N. Skuratovskaya ◽  
T. V. Malakhova ◽  
A. R. Boltachev ◽  
V. V. Lobkо

Despite the ban on the use of organochlorine compounds (OCs), they are still widely distributed in various components of the Black Sea ecosystem, including fish. Sevastopol marine area, as a region of active economic use, is a subject of significant anthropogenic impact. The levels of OCs contamination in the scorpion fish Scorpaena porcus Linnaeus, 1758, which leads a sedentary life, can serve as an indicator of such impact. The organochlorine compounds were determined in 58 samples of white muscles, gonads and liver of the scorpion fish captured in 2016–2017 in the various bays of Sevastopol (Aleksandrovskaya, Balaklava, Kazach’ya, Streletskaya, Laspi), as well as in the open coastal water area (the area of the Lyubimovka village). The qualitative and quantitative analyses of organochlorine pesticides and six indicator congeners of polychlorinated biphenyls were performed by gas chromatography with a micro-electron capture detector. To determine the response of scorpion fish to the contamination level, such biochemical markers, as alanine aminotransferase, aspartate aminotransferase, catalase activities, albumin content, level of oxidative protein modification and malondialdehyde concentration, were studied in the liver of fish from these areas. The OCs content in fish depended on the contamination of the fish habitat. The highest OCs level is in fish organs from bays (Alexandrovskaya, Streletskaya, Balaklava), and the smallest – in the fish organs from open Laspi Bay. The accumulation of OCs in the scorpion fish organs differed according to the lipid content in their tissues. The maximum rates of OCs concentrations were in the liver of fish catch from all investigated regions, the minimum – in the gonads (from bays samples) and in the white muscles (from open areas samples). The obtained relationships between the OCs content and biochemical parameters indicate the weakening of antioxidant protection and the increasing of oxidative stress in fish as a result of the xenobiotic accumulation.


Author(s):  
Yu.V. Slynko ◽  
T.A. Polyakova ◽  
E.E. Slynko

Проведён молекулярно-генетический анализ фрагментов двух генов 18S-rRNA (длиной 568 п.н.) и 28S-rRNA (длиной 312 п.н.) цестод рода Bothriocephalus Rud., 1808, паразитирующих у скорпены Scorpaena porcus (Linnaeus, 1758) и у черноморской камбалы Scophthalmus maeoticus (Pallas, 1814), обитающих в Чёрном море. Материал был собран в северной части Чёрного моря возле побережья Крымского полуострова. Пробы тела паразитов фиксировали в 96 этаноле. В результате, как по каждому гену в отдельности, так и при их объединении установлено, что образец, извлечённый из скорпены (деп. в NCBI MH011407 18S-rRNA и MH000375 28S-rRNA), надёжно идентифицируется, как относящийся к кладе, содержащей B. timii, B. scorpii и B. australis, р-расстояние между нашим образцом и другими видами этой группы не превышает 1,6. Остальные три образца MH011408, MH011409, MH011410 (для гена 18s-rRNA) и MH000376 (для гена 28s-rRNA) сформировали отдельную кладу, состоящую из двух субклад: одна включает образцы МН011409 и МН011410, другая образец МН011408 (указаны только регистрационные номера для гена 18s-rRNA). Следует также отметить, что виды Bothriocephalus timii и Bothriocephalus scorpii дистанцированы всего лишь на 0,5, а Bothriocephalus timii и Bothriocephalus australis на 0,6. Гаплотипы вида Bothriocephalus claviceps составили внешнюю группу, р-расстояние от которого всех, как наших образцов, так и рассматриваемых видов комплекса scorpio , не опускалось ниже 26,3. Вместе с тем, дистанцированность объединённых гаплотипов цестод из черноморской камбалы на уровне 45 р-расстояний, а также значения бутстрепа позволяют полагать их близнецовыми видами (или подвидами) в пределах рода, по аналогии с генами мтДНК. В результате анализа нуклеотидной изменчивости данных фрагментов генов подтверждена принадлежность рассматриваемых экземпляров к роду Bothriocephalus, и они идентифицированы как виды, входящие в комплекс видов Bothriocephalus scorpii .Molecular genetic analysis of fragments of the two genes 18S-rRNA (568 bps long) and 28S-rRNA (312 bps long) cestodes of the genus Bothriocephalus Rud., 1808, parasitizing in Scorpaena porcus (Linnaeus, 1758) and at the Black Sea flounder Scophthalmus maeoticus (Pallas, 1814) living in the Black Sea. Material was collected in the northern Black Sea off the coast of the Crimean Peninsula. Samples of the body of parasites were fixed in 96 ethanol. As a result it was established both for each gene individually and when combining them that the sample extracted from scorpion ( in NCBI MH011407 18S-rRNA and MH000375 28S-rRNA) is reliably identified as referring to clade containing B. timii, B. scorpii and B. australis, the p-distance between our sample and other species of this group does not exceed 1.6. The remaining three samples MH011408, MH011409, MH011410 (for the 18s-rRNA gene) and MH000376 (for the 28s-rRNA gene) formed a separate clade which consists of two subclades: one includes samples MH011409 and MH011410 the other sample MH011408 (only registration numbers are indicated for MH011408 gene 18s-rRNA). It should also be noted that the species Bothriocephalus timii and Bothriocephalus scorpii are only 0.5 apart while Bothriocephalus timii and Bothriocephalus australis are 0.6 apart. Haplotypes of the species Bothriocephalus claviceps constituted an external group, the p-distance from which of all both our samples and the species of the scorpio complex under consideration did not fall below 26.3. At the same time the distance between the combined haplotypes of cestodes from the Black Sea flounder at the level of 45 p-distances as well as bootstrap values allow us to consider them to be twin species (or subspecies) within the genus by analogy with mtDNA genes. An analysis of the nucleotide variability of these gene fragments confirmed the affiliation of the examined species to the genus Bothriocephalus and they were identified as species forming part of the complex of species Bothriocephalus scorpii.


Sign in / Sign up

Export Citation Format

Share Document