One mature female specimen of serpent eel
(Linnaeus, 1758) was caught by long line by a professional fisherman at a depth of about 45 m from Ece Bight, Saros Bay, north Aegean Sea on 15 February ...2016. The species was previously reported without any morphometric and meristic characters from Saros Bay. Some biological characters, such as age and diameters of otolith and oocytes, are also given. In this study, the detailed morphomeristic features, which can contribute to the taxonomic studies of serpent eel from Turkish Seas, are presented.
We report evidence of an XX/XY sex chromosome system in the snake eel Ophisurus serpens (Anguilliformes: Ophichthidae). We characterized the male and female karyotypes by C-, replication- and ...HaeIII-bandings. The 45S and 5S ribosomal gene families were located using dual fluorescence in situ hybridization, which showed that the 5S rDNA sites were present on the X chromosome, beside an autosome pair. FISH with a telomeric peptide nucleic acid probe enabled recognition of Interstitial Telomeric Sequences (ITSs), likely remnants of chromosomal rearrangements, in five chromosome pairs, including the rDNA-bearing ones. Possible mechanisms of the origin of sex chromosomes in this species are discussed, considering the presence of a sex-linked marker and ITSs.
A specimen of the serpent eel Ophisurus serpens (Order: Anguilliformes, Family: Ophichthinae) reaching 2100 mm in total length was caught on 13 October 2017 by bottom trawl at mean depth 206.5 m in ...Saronikos Gulf (central Aegean Sea, Greece). This specimen is the second record in this area since 1979 and the largest specimen ever recorded in the eastern Mediterranean Sea. Historical records of this rare species in the Mediterranean Sea are reported and discussed.
The occurrence of the rare serpent eel Ophisurus serpens is reported here for the first time from the Anatolian coasts of the South Aegean Sea. On 5 January 2015, a single specimen with a total ...length of 121. 2 cm and 363.14 g was collected by seine boat off Gökova Bay, Turkey. This finding shows that its population is expanding southwards, from Izmir to the Anatolian coasts of the Aegean Sea.
The hemoglobin system of the serpent eel
Ophisurus serpens
was structurally and functionally characterized with the aim of comparing it to the hemoglobin system of other fish species, as oxygen ...loading under the severe habitat conditions experienced by
O. serpens
could have necessitated specific adaptation mechanisms during evolution. The hemoglobin system of
O. serpens
includes one cathodic and four anodic components. The molecular mass of the α and β chains of the cathodic component as well as the 2 α and 4 β of the anodic components were determined. Analysis of the intact α and β chains from cathodic hemoglobin and their proteolytic digestion products by high-resolution MS and MS/MS experiments resulted in 92 and 95 % sequence coverage of the α and β globins, respectively. The oxygen binding properties of both hemoglobin components were analyzed with respect to their interactions with their physiological effectors. Stripped cathodic hemoglobin displayed the highest oxygen affinity among Anguilliformes with no significant effect of pH on O
2
-affinity. In the presence of both chloride and organic phosphates, O
2
-affinity was strongly reduced, and cooperativity was enhanced; moreover, cathodic hemoglobin contains two indistinguishable GTP-binding sites. Stripped anodic hemoglobins exhibited both low O
2
-affinity and low cooperativity and a larger Bohr effect than cathodic hemoglobin. The cathodic hemoglobin of
O. serpens
and the corresponding component of
Conger conger
share the greatest structural and functional similarity among hemoglobin systems of Anguilliformes studied to date, consistent with their phylogenetic relationship.
Zreli primjerak ženke zmije zubuše Ophisurus serpens (Linnaeus, 1758) ulovljen je parangalom na dubini od oko 45 m blizu mjesta Ece Bight, zaljev Saros, u sjevernom Egejskom moru 15. veljače 2016. ...Navedena vrsta je prethodno zabilježena u zaljevu Saros ali bez unesenih morfometrijskih i merističkih karakteristika. Biološka svojstva vrste, kao što su dob, promjer otolita i oocita, navedeni su u radu. Također, u ovom radu su predstavljena detaljna morfomeristička obilježja koja mogu pridonijeti taksonomskim istraživanjima zmije zubuše iz turskih mora.
Provider: - Institution: National Library of the Netherlands - Koninklijke Bibliotheek - Data provided by Europeana Collections- All metadata published by Europeana are available free of restriction ...under the Creative Commons CC0 1.0 Universal Public Domain Dedication. However, Europeana requests that you actively acknowledge and give attribution to all metadata sources including Europeana
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