Garra hormuzensis, new species, is described from the Kol River drainage. It distinguished its congeners in Iranian part of Persian Gulf basin by having 7 branched dorsal-fin rays, usually 9+8 caudal-fin breast, belly and back front origin covered scales, a free lateral posterior margins gular disc. further characterised minimum K2P distance 1.16% to G. mondica mtDNA COI barcode region.

This checklist aims to reviews and summarize the results of systematic zoogeographical research on Iranian inland ichthyofauna that has been carried out for more than 200 years. Since work J.J. Heckel (1846-1849), number valid species increased significantly status many changed, reorganization updating published information become essential. Here we take opportunity provide a new updated freshwater fishes Iran based literature taxon occurrence data obtained from natural history fish...

A new killifish species, Aphanius isfahanensis, is described from the Isfahan basin of Iran. It distinguished other Iranian species by adult color pattern, molecular character states mitochondrial DNA sequence data, and in multivariate morphometric meristic space. Based on phylogenetic analysis hypothesized to be sister taxon A. sophiae plus persicus, which also occur

Length-weight relationships were estimated for 16 populations of six Iranian toothcarp species. Differences between sexes statistically significant two the

The study describes the length–weight and length–length relationships for three cyprinid species, namely Barbus lacerta, Squalius lepidus Pseudorasbora parva, a balitorid Oxynoemacheilus angorae from Sirwan River (located in Kurdistan Kermanshah provinces, Iran. This presents first reference on LWR most of species their distribution range.

We assessed the distribution of alien fishes in Karun River Basin, Iran. Fish were collected from 39 sites during November–December 2018 low-flow period. In total, fish species nine orders and 14 families documented. Among these, 10 to basin (986 individuals; 15.7%). Four most abundant primarily impounded, downstream reaches. Redundancy analysis (RDA) was conducted identify extent changes assemblages with environmental parameters. RDA1 RDA2 accounted for 36.24% 25.33% variation species,...

Sticklebacks are widely used in comparative biology, but despite past systematic studies, questions of intrarelationships remain. We examined seven nominal species Pungitius ( P. pungitius , occidentalis sinensis tymensis platygaster laevis and hellenicus ) four other sticklebacks, Culaea inconstans Gasterosteus aculeatus Apeltes quadracus Spinachia spinachia to hypothesize their relationships. Thirty-three informative morphological (osteological meristic) characters were analyzed. The...

Reproductive characteristics of siahmahi, Capoeta damascina (Valenciennes, 1842), a native cyprinid in the Zayandeh-Roud River, were investigated by monthly sampling from March 2007 to April 2008. Among 689 specimens captured, overall sex ratio was 1 : 1.57 (males females). Males matured at age 2+. Females between ages 4 and 6, with 100% maturity 7+. Based on gonadosomatic index (GSI), reproductive period peaked May June. Histological macroscopic gonad indicated species be group-synchronous....

This study describes the length–weight and length–length relationships for three cyprinid species from Bibi-Sayyedan River (western Isfahan provinces, Iran). The slope parameter (b) values in relationship equations were determined as 3.0729 Alburnus mossulensis Heckel, 1843; 2.8509 Barbus lacerta 3.0864 Chondrostoma regium (Heckel, 1843). presents first LWR LLR references these River.

The length–weight relationships (LWR) for three fish species collected in Sirwan River, located Kurdistan and Kermanshah provinces, western Iran, were estimated. values of the slope parameter (b) relationship equations determined as 3.086 Alburnus mossulensis, 3.382 filippii 3.425 Capoeta damascina, all significantly different from expected b = 3 value, indicating a positive allometric growth pattern species.

A total of 691 specimens (114 males, 538 females, and 39 immature specimens) were collected from Bushehr coastal waters the Persian Gulf February 2007 to 2008 study reproduction this species along with its histological gonadal development. Mean absolute relative fecundity was 263,162 ± 31,046 273 27, respectively. The oogonia oocyte diameter ranged between 6 µm 875 a mean 318 µm. relationship weight F = 192.85W + 69,291. Monthly changes in gonadosomatic index exhibited higher value May...

The present study was conducted to provide a detailed descriptive osteology of Barbus cyri from Southern Caspian Sea for the first time and comparing it with those B. lacerta Tigris Urmia lake basins. For this purpose, twelve specimens were collected Safidrud River using electrofishing device fixed in 10% buffered formalin. Then, cleared stained alcian blue alizarin red osteological examination. A description features provided. Based on results, several differences observed between two...

The feeding habits of the king soldier bream Argyrops spinifer (Forsskål, 1775), were examined in northern part Persian Gulf (coastal waters Bushehr, Iran). stomach contents 622 specimens, 13.5–64.2 cm total length, collected by a trawl boat from June 2010 to May 2011, analysed assess influence size, season and sex on their diet composition. Amongst stomachs, 57 empty (vacuity index = 9.2%), which varied significantly (P < 0.05) throughout year. According results, this species is generalist...

Abstract Zayandehrud Dam Lake located in Isfahan province is the largest lake central Iran. In this study, plankton communities including phytoplankton and zooplankton were studied as bioindicator organisms for assessment of water quality Lake. The collected from four stations at different seasons during 2014 by using a Nansen bottle sampler. samples with net (mesh size = 50 µm). community was composed Bacillariophyceae, Cyanophyceae, Euglenophyceae, Dinophyceae Chrysophyceae. viz;...

Fifty-four specimens of the kingsoldier bream, Argyrops spinifer (Forsskal, 1775) from coastal waters Persian Gulf, in Bushehr Province, were aged by otolith readings to assess suitability using length/weight for age estimation this fish. Otolith length and weight increased along with an increase The relationship between fish (TL) (OW) was as OW=0.007TL –0.79 (r 2 =0.90), (t) (OL) OL=5.576 0.346 =0.88), OW=0.03 0.837 =0.91) OL=1.125 0.644 =0.92). Thus, these parameters could be readily used...

The osteology of the hyoid and branchial arches in several representatives eurypterygian fishes were examined. consist a single basihyal urohyal, arch on each side consists dorsal ventral hypohyal, an anterior posterior ceratohyal, interhyal, branchiostegal rays that are borne ceratohyals. three single, separate, ossified basibranchials, most taxa hypobranchials, five ceratobranchials, four epibranchials, pharyngobranchials, associated teeth tooth plates. fourth pharyngobranchial is absent...