scholarly journals Sex Differences and Sex Identification in the Small-Scaled Scorpionfish, Scorpaena Porcus (Scorpaenidae, Scorpaeniformes)

2016 ◽  
Vol 50 (4) ◽  
pp. 355-362
Author(s):  
V. N. Peskov ◽  
L. G. Manilo

Abstract Sex differences and the ability to determine the sex of Scorpaena porcus (Linnaeus, 1758) on morphological characters were studied in the population inhabiting coastal waters of the Black Sea near the southern coast of Crimea. These differences were revealed in size (females are larger than males) and in proportions of the body. It is found that variation of the absolute and relative values in plastic characters is higher in females compared with males. It is shown that in 92 % of individuals belonging to S. porcus we can determine the sex using morphological characters with a probability of 99.9-100 %.

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.


2004 ◽  
Vol 40 (3) ◽  
pp. 42-54 ◽  
Author(s):  
A. D. Gordina ◽  
V. G. Tsytsugina ◽  
Ye. I. Ovsyaniy ◽  
A. S. Romanov ◽  
R.B. Kemp

2013 ◽  
Vol 49 (3) ◽  
pp. 105-111 ◽  
Author(s):  
Ye. B. Mel'nikova ◽  
Yu. N. Tokarev ◽  
N. V. Burmistrova

2019 ◽  
Vol 59 (6) ◽  
pp. 1008-1015
Author(s):  
A. D. Gubanova ◽  
O. A. Garbazey ◽  
D. A. Altukhov ◽  
V. S. Mukhanov ◽  
E. V. Popova

Long-term (20032014) routine observations of zooplankton in Sevastopol Bay (the Black Sea) have allowed the naturalization of the invasive copepod Oithona davisae to be studied in the Black Sea coastal waters. Inter-annual and seasonal variability of the species and their impact on the native copepod community have been analyzed. The invasion of O. davisae and their undoubted dominance in terms of abundance were shown to alter the community structure but, at the same time, the abundances of the native species did not decrease, excepting the Black Sea earlier invader Acartia tonsa. A significant decline in A. tonsa numbers over the stages of O. davisae establishment and naturalization provided evidence of competition between the species. O. davisae have been demonstrated to gain competitive advantage over A. tonsa, that ensured their fast dispersal in the Black Sea, acclimatization in the new habitat and the successful competition over native species.


Author(s):  
Svetlana Rubtsova ◽  
Svetlana Rubtsova ◽  
Natalya Lyamina ◽  
Natalya Lyamina ◽  
Aleksey Lyamin ◽  
...  

The concept of a new approach to environmental assessment is offered in the system of integrated management of the resource and environmental safety of the coastal area of the Black Sea. The studies of the season and daily changeability in the bioluminescence field in the Sevastopol coastal waters has been conducted. For the first time considerable differences in the bioluminescence field seasonal changes in the surface and deep water layers and the reasons conditioning this phenomenon have been shown, using a method of multidimensional statistical analysis. The bioluminescence field vertical profile change in the Black sea coastal waters in the autumn period at night has been studied. It has been shown that according to the character of bioluminescence parameters dynamics a water column can be divided into layers: upper (0 – 35 m) and deep water (36 – 60 m). It has been revealed that life rhythms of the plankton community are the main reason for the bioluminescence field intensity variability. It has been revealed that 14-hour periodicity of the bioluminescence field is related to the changes in light and its variations with 2,5…4,5 hours are conditioned by planktonts endogenous daily rhythms. And here biotic factors effect mostly periodicity of the bioluminescence field intensity increase and fall down at the dark time of the day. Abiotic factors are of less importance in circadian rhythmic of the bioluminescence field in the neritic zone.


Author(s):  
Daniel Cocan ◽  
Vasile Otel ◽  
Calin Latiu ◽  
Vioara Miresan

In August 2015 we managed to capture a specimen of ratan goby (Ponticola ratan) in the Romanian coastal waters of the Black Sea, near the locality of Sf. Gheorghe (Tulcea County). This is the 7-th signaling for this species in Romanian coastal waters. The previous 6 specimens were recorded in the period 1960-1993, between Mangalia (Constanţa County) and Sulina (Tulcea County). The species was identified by means of meristic characters (number of scales on medial line, number of spiny and soft rays), and morphological particularities (cycloid scales on the nape area and pectoral fin joint). Also, the measurements made, confirmed that the ratio between the head length and total length, which was 33% (TL=8.70 cm vs. Head Length=2.61cm). Another morphological character, specific to this species, is the lower jaw, which exceeds in length the upper jaw. Being a Ponto-Caspian endemite, with low population along the Bulgarian and Romanian coastline, we considered it important to point out this new record. Noting that, being known the trend of sporadic migration of this species, would not be excluded that global warming causes a shift from its normal distribution area, from northern and northeastern (Black Sea) to south-west. Therefore, future research may bring more notifications regarding this species in south-western area of the Black Sea


1996 ◽  
Vol 32 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Adriana Cociasu ◽  
Liliana Dorogan ◽  
Christoph Humborg ◽  
Luci Popa

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