ВЛИЯНИЕ СОЛЕЙ АЗИДА, ФТОРИДА, ОРТОВАНАДАТА И ЭДТА НАТРИЯ НА ЭКТО-АТФАЗНУЮ АКТИВНОСТЬ ЭРИТРОЦИТОВ СКОРПЕНЫ (SCORPAENA PORCUS L .) И МОРСКОЙ ЛИСИЦЫ (RAJA CLAVATA L .)

2021 ◽  
Vol 57 (5) ◽  
pp. 380-391
Author(s):  
Ю. А. Силкин ◽  
Е. Н. Силкина ◽  
М. Ю. Силкин
Keyword(s):  
Raja Clavata ◽  
Scorpaena Porcus

Pontobdella muricata and Trachelobdella lubrica (Hirudinea: Piscicolidae) on some marine fish in the Dardanelles, Turkey

2003 ◽  
Vol 83 (6) ◽  
pp. 1315-1316 ◽  
Author(s):  
Naim Saglam ◽  
Mehmet Cemal Oguz ◽  
Ekrem Sanver Celik ◽  
Seydi Ali Doyuk ◽  
Ahmet Usta
Keyword(s):  
Marine Fish ◽  
Fish Species ◽  
Marine Fish Species ◽  
Torpedo Marmorata ◽  
Raja Clavata ◽  
Scorpaena Scrofa ◽  
Scorpaena Porcus

Fifteen individuals of four marine fish species (Torpedo marmorata, Raja clavata, Scorpaena porcus and Scorpaena scrofa) caught in the Dardanelles, Turkey, were examined for the leech Pontobdella muricata and Trachelobdella lubrica; 18 P. muricata and 23 T. lubrica were found on gills, at the base of the fins, and abdomen on 14 of the 15 fish.

РЕЗИСТЕНТНОСТЬ ЭРИТРОЦИТОВ НЕКОТОРЫХ ЧЕРНОМОРСКИХ РЫБ ПРИ ГИПООСМИИ И ВОЗДЕЙСТВИИ НЕИОННЫХ ДЕТЕРГЕНТОВ ТРИТОНА Х-100 И ТВИНА-20

2021 ◽  
Vol 66 (6) ◽  
pp. 1137-1143
Author(s):  
Ю.А. Силкин ◽  
◽  
Е.Н. Силкина ◽  
М.Ю. Силкин ◽  
◽  
...  
Keyword(s):  
Raja Clavata ◽  
Scorpaena Porcus

У четырех видов черноморских рыб - ставриды (Trachurus mediterraneus ponticus Aleev), ласкиря (Diplodus annularis L.), скорпены (Scorpaena porcus L.) и морской лисицы (Raja clavata L.) - исследованы осмотическая резистентность эритроцитов и влияние на гемолитическую активность красных клеток крови при гипоосмии неионных детергентов Тритона Х-100 и Твина-20. Показано, что в физиологических растворах при гипоосмии эритроциты морской лисицы и скорпены проявляли высокую резистентность к действию гипотонической среды. Определение концентрации физиологического раствора, в котором за время инкубации гемолизировалось 50% эритроцитов рыб (С50%) позволило ранжировать эритроциты рыб по степени осмотической устойчивости в следующем порядке: скорпена > морская лисица > ласкирь > ставрида. Эритроциты исследованных костистых рыб демонстрировали по С50% четкую зависимость от подвижности, которая возрастала в ряду рыб с уменьшением их двигательной активности. Тритон Х-100 не вызывал повышение резистентности или даже слабо стимулировал повышение гемолитической активности эритроцитов ласкиря и морской лисицы...

scholarly journals Morphological abnormality in thornback ray Raja clavata in the Irish Sea

2021 ◽  
Author(s):  
L. J. Clarke
Keyword(s):  
Irish Sea ◽  
Beam Trawl ◽  
Morphological Abnormality ◽  
Free Swimming ◽  
Pectoral Fins ◽  
North Wales ◽  
Head Section ◽  
Thornback Ray ◽  
Raja Clavata ◽  
The Irish Sea

AbstractA free-swimming thornback ray Raja clavata specimen demonstrating significant morphological abnormality is reported, captured by beam trawl in the Irish Sea off north Wales, UK. The anterior sections of both pectoral fins were separated from the head section for a length of approximately 140 mm extending from the rostrum tip to a point posterior of the spiracles, along with abnormal morphology of the gill slits. This phenomenon has been observed elsewhere but is the first documented example of this abnormality in the eastern Irish Sea, despite widespread targeting of the species across the region by commercial and recreational fishers. Possible causes and consequences of the observed abnormality are discussed.

Pontobdella muricata infection of Raja clavata and Dasyatis pastinaca off the coast of Lesvos, Greece

2013 ◽  
Vol 94 (2) ◽  
pp. 405-409 ◽  
Author(s):  
Vasileios Bakopoulos ◽  
Vasiliki-Chrysa Ksidia
Keyword(s):  
Microscopic Observation ◽  
First Record ◽  
Eastern Aegean ◽  
North Eastern ◽  
Raja Clavata ◽  
Investigation Period

An investigation of ectoparasites of skates caught off the coast of Lesvos Island, north-eastern Aegean, Greece was performed from May 2010 to February 2012. One parasite, identified as the marine leech Pontobdella muricata, was found on the skin of 0.43% of Raja clavata and 3.6% of Dasyatis pastinaca specimens examined during the investigation period. This is the first record of D. pastinaca as being a host to P. muricata. Macroscopic and microscopic observation of the lesions caused by the parasitism, revealed haemorrhages and swelling of the skin of R. clavata, a milder inflammation of the skin of D. pastinaca, congestion, necrosis and liquefaction of the skin at the site of leech attachment and a lesion with disappearance of upper skin layers after the detachment of the leech.

scholarly journals The Spatial Heterogeneity of the Black Scorpionfish, Scorpaena porcus (Scorpaenidae): Differences in Length, Dietary and Age Compositions

2021 ◽  
Vol 11 (24) ◽  
pp. 11919
Author(s):  
Josipa Ferri ◽  
Sanja Matić-Skoko
Keyword(s):  
High Selectivity ◽  
Adriatic Sea ◽  
Multivariate Analyses ◽  
Growth Parameters ◽  
Island Area ◽  
Intraspecific Variations ◽  
Geographical Scale ◽  
Diet Analyses ◽  
Slow Growing ◽  
Scorpaena Porcus

The present study assessed spatial variations in several biological characteristics of Scorpaena porcus Linnaeus, 1758 and estimated length structure, dietary composition and growth parameters for the species. Sampling was carried out in two areas, about 200 km apart, in the coastal Adriatic Sea, which is the northernmost region of the Mediterranean. A total of 388 specimens of S. porcus were caught, 233 from the Split area and 155 from the Pag Island area, and a higher proportion of individuals in the ≤15 cm length classes were found in the Split area. The results of the age, growth and diet analyses demonstrated that the black scorpionfish is a slow-growing and long-lived species that feeds on a wide variety of plant and animal taxa and shows a high selectivity for crustacean decapods. Detailed comparisons and multivariate analyses showed significant fine-scale spatial structuring of the investigated species, as observed length, dietary and age compositions were heterogeneous among the two areas. Fish from the Pag Island area ingested a greater diversity of the prey types, fed to a greater extent on fishes, reached the highest total length and showed a higher growth rate. Such intraspecific variations could reflect adaptations to different environmental conditions and support the geographical scale at which local black scorpionfish populations should be managed.

scholarly journals Alguns nematódeos de peixes do Oceano Atlântico - Costa Continental Portuguesa e Costa do Norte da África

1973 ◽  
Vol 71 (3) ◽  
pp. 247-256 ◽  
Author(s):  
H. de Oliveira Rodrigues ◽  
Manuel Carvalho Varela ◽  
S. Sodré Rodrigues ◽  
Rigoletto Cristófaro
Keyword(s):  
Raja Clavata ◽  
Conger Conger

Os autores estudam 6 espécies de nematódeos encontrados em 21 peixes coletados no Oceano Atlântico na Costa Continental Portuguesa e Costa no Norte da África. Dos 21 peixes necropsiados 7 (33,3%) estavam parasitados por nematódeos. Os hospedeiros bem como os nematódeos encontrados e as freqüências de positividade são as seguintes: 6 exemplares de Beryx decadactylus um dos quais parasitado por Ascarophis morrhuae (16,6%); 3 Lethrinus atlanticus um dos quais parasitado por Luzonema cruzi gen. n. sp. n. (33,3%); 3 Scyliorhynus canicula sendo 2 parasitados por Proleptus obutusus (66,6%); 8 de Raja clavata sendo um parasitado por Proleptus robustus (12,5%) e outro por Pseudanisakis rajae (12,5%); 1 Conger conger parasitado por Cucullanus longispiculum sp. n. (100 %). Pseudanisakis rajae é referido pela primeira vez no Oceano Atlântico e como parasita de Raja clavata. Beryx decadactylus é referido pela primeira vez como hospedeiro de Ascarophis morrhuae.

scholarly journals THE LIVER LIPID FATTY ACID COMPOSITION OF TWO CARTILAGINOUS FISH, THE THORNBACK RAY (Raja clavata) AND THE COMMON SMOOTH-HOUND (Mustelus mustelus)

2019 ◽  
pp. 143-153
Author(s):  
Cahide Çiğdem Yığın ◽  
Fikret Çakır ◽  
Koray Cabbar ◽  
Bayram Kızılkaya ◽  
Hasan Basri Ormancı ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Liver Lipid ◽  
Cartilaginous Fish ◽  
Lipid Fatty Acid ◽  
Thornback Ray ◽  
Raja Clavata ◽  
The Common ◽  
Lipid Fatty Acid Composition
Sign in / Sign up

Export Citation Format

Share Document