#Carasobarbus sublimus

[oaresearchpaper]

Discovery of Carasobarbus Sublimus in Al-Diwaniya River, Iraq

Abstract

During a fish survey from 2016 to 2017, we captured 83 specimens of the cyprinid fish, Carasobarbus sublimus from the Al-Diwaniya River, Middle Euphrates, Iraq. This is the first report of the occurrence of this species in this locality. Fish were captured by gill nets and electro-fishing equipment. Twenty two morphometric and eleven meristic measurements were applied to describe the species. The range of total length in the present specimens (130.4-250.1mm) is larger than the range quoted for C. sublimus. The indices characters to standard length (SL) varied from 7.4 % to 121.0 %, and the head characters to head length (HL) from 27.4% to 93.2%. The growth rate between body characters and SL varied from 0.085 to 1.118 and between head characters and HL from 0.210 to 1.091.The numbers of scales in lateral line and around the least circumference of the caudal peduncle are 27-29 and 12, respectively. The biometric data were successful in identifying of C. sublimus and confirm the presence of the species in the Al-Diwaniya River. This is the second record of the species in the Iraqi freshwaters. Based on this finding, the case would be interesting and open to discussion about the distributions of C. sublimus in the Tigris-Euphrates basin.

Introduction

According to Borkenhagen and Krupp (2013), the cyprinid genus Carasobarbus Karaman, 1971 (the himri) belong to the family Cyprinidae, subfamily Barbinae are distributed across southwest Asia and northwest Africa. They occur in all major river systems of the Levant, Mesopotamia, southern Iran, western and south-western Arabian Peninsula and in northern Morocco. 

Also, Borkenhagen and Krupp (2013) revised and expanded Karaman’s (1971) diagnosis of the genus that now contains the nine following species: Carasobarbus apoensis, C. canis, C. chantrei, C. exulatus, C. fritschii, C. harterti, C. kosswigi, C. luteus and C. sublimus.

Three species from the genus, C. luteus, C. kosswigi and C. sublimus have been reported from Iranian waters (Borkenhagen and Krupp, 2013) and C. chantrei, C. kosswigi and C. luteus from Turkish waters (Çiçek et al., 2015), while C. luteus, C. kosswigi and C. sublimes were found in Iraqi waters (Coad, 2010; Mohamed et al., 2017).

C. sublimus was first described and reported by Coad and Najafpour in 1997 from Khuzestan waters, southwestern Iran. C. sublimus formerly placed in the genus Kosswigobarbus Berg, 1916, but Borkenhagen et al. (2011) placed this species in Carasobarbus.

Coad and Najafpour (1997) and Esmaeil et al. (2006) have rectified the species by comparing it with C. kosswigi and C. luteus on the basis of their morphology in Iran, while, Mohamed et al. (2017) described and compared C. sublimus obtained from the Shatt Al-Arab River for the first time in Iraq with C. luteus in Iraqi waters.

During the ichthyofauna survey for the Al-Diwania River (a branch from the Euphrates River, middle of Iraq) during November 2016 - October 2017, several specimens of cyprinid fish, C. sublimus have been caught for the first time from south the Daghghara barrier on this river. 

The predominant vegetations on the both banks of this locality were reed, Phragmites australis and cattail, Typha domingensis, whereas hornwort, Ceratophyllum demersum was dominant in the deeper areas.

The water temperature of the river varied from 10.2oC in March to 32.8oC in August, dissolved oxygen fluctuated from 5.0mg/l in August to 9.6mg/l cm in February, salinity values ranged from 0.55‰ in April to 0.79‰ in October (Mohamed and Al-Jubouri, 2017). 

So, the purpose of this paper is to describe the morphometric and meristic characters of C. sublimus for the first time in the middle of Iraq. Examined specimens had been placed in the fish collection of the Department of Pathology, College of Veterinary Medicine, Al-Qasim Green University, Iraq.

Source Occurrence of cyprinid fish, Carasobarbus sublimus in the Al-Diwaniya River, Middle Euphrates, Iraq