RESUMO
The parasitic copepod genus Parabrachiella is composed of 70 species, 14 of which are found in South America. The finding of new specimens of Parabrachiella mugilis from Turkey allowed us to compare the nucleotide sequences of the mitochondrial cytochrome c oxidase subunit I (COI) gene of this species with those of the South American Parabrachiella exilis and Parabrachiella platensis; all these species are parasites of mugilids. In addition, specimens of Parabrachiella fasciata, Parabrachiella oralis and Parabrachiella dispar from Chile, and Parabrachiella chevreuxi from Argentina were included in the comparison. Our results confirmed that the three Parabrachiella species parasitizing mugilids, which had been identified by morphology, are valid entities. However, P. exilis was recently synonymized with P. mugilis. The latter species showed a great genetic distance from P. exilis (16%) and was closer to Parabrachiella fasciata (13%) and to species with long posterior processes. Parabrachiella exilis and P. platensis (parasite on Mugil cephalus and Mugil liza, respectively) had a low genetic distance (9%) and Parabrachiella kabatai (parasite of Isacia conceptionis) had a low genetic distance (12-13%) from P. fasciata, P. platensis and P. exilis. In addition, the three parasitic copepods from South America have short and round posterior processes compared to other species, which have long posterior processes. Most species with long posterior processes are clustered together in a Pacific Ocean clade (P. hugu from the North Pacific Ocean), with the exception of P. chevreuxi, which has been found in the South Atlantic Ocean. This study adds seven new sequences, making a total of nine sequenced South American species of Parabrachiella.
Assuntos
Copépodes , Smegmamorpha , Animais , Oceano Atlântico , Chile , Copépodes/genética , PeixesRESUMO
Caligus diaphanus Nordmann,1832 (Copepoda; Caligidae) was reported for the first time from the gill chambers and inner faces of opercula of Chelidonichthys lucerna (Triglidae) from Aegean Sea Coasts in Turkey. Some morphological characters of this parasitic copepod are given using photograph and drawings.
Caligus diaphanus Nordmann, 1832 (Copepoda; Caligidae) foi relatado pela primeira vez das câmaras branquiais e faces internas dos opérculos de Chelidonichthys lucerna (Triglidae), do Mar Egeu, nas costas da Turquia. Alguns caracteres morfológicos deste copépode parasitário são apresentadas através de fotografia e ilustração.
Assuntos
Animais , Ambiente Marinho , Copépodes , Fauna Marinha , Peixes , TurquiaRESUMO
Caligus diaphanus Nordmann,1832 (Copepoda; Caligidae) was reported for the first time from the gill chambers and inner faces of opercula of Chelidonichthys lucerna (Triglidae) from Aegean Sea Coasts in Turkey. Some morphological characters of this parasitic copepod are given using photograph and drawings.(AU)
Caligus diaphanus Nordmann, 1832 (Copepoda; Caligidae) foi relatado pela primeira vez das câmaras branquiais e faces internas dos opérculos de Chelidonichthys lucerna (Triglidae), do Mar Egeu, nas costas da Turquia. Alguns caracteres morfológicos deste copépode parasitário são apresentadas através de fotografia e ilustração.(AU)
Assuntos
Animais , Peixes , Copépodes , Ambiente Marinho , Fauna Marinha , TurquiaRESUMO
Metric and meristic characters are important to identify fish species and their habitat peculiarities. There are many species that belong to the fish genus Barbus, which is found in tropical and extratropical regions, but there are few studies covering the Coruh basin. Two subspecies of Barbus were found in the Coruh River system of Eastern Anatolia, Turkey: Barbus plebejus escherichi and Barbus capito capito. We collected specimens in seven localities for measurement. The number of vertebra were determined radiographically. Some specimens of B. capito capito have a sharper snout in the segments of Coruh where the water flows faster, suggesting a modification related to current. The biometric measurements vary geographically and could be related to abiotic and biotic factors in the habitat.
Assuntos
Cyprinidae/anatomia & histologia , Cyprinidae/classificação , Ecossistema , Animais , Biometria , Rios , TurquiaRESUMO
Metric and meristic characters are important to identify fish species and their habitat peculiarities. There are many species that belong to the fish genus Barbus, which is found in tropical and extratropical regions, but there are few studies covering the Coruh basin. Two subspecies of Barbus were found in the Coruh River system of Eastern Anatolia, Turkey: Barbus plebejus escherichi and Barbus capito capito. We collected specimens in seven localities for measurement. The number of vertebra were determined radiographically. Some specimens of B. capito capito have a sharper snout in the segments of Coruh where the water flows faster, suggesting a modification related to current. The biometric measurements vary geographically and could be related to abiotic and biotic factors in the habitat. Rev. Biol. Trop. 57 (1-2): 159-165. Epub 2009 June 30.