Vol. 12,No. 4, October 2013
Study on the parasites of Pseudorhombus elevatus, Psettodes erumei and Brachirus orientalis from the
Description: 1-Department of Parasitology Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran 2-Department of Veterinary Medicine, Higher Education Institute of Applied Science and Technology of Jihad Agriculture, Tehran, Iran 3-Department of Parasitology, School of Public Health, Tehran University of Medical Science, Tehran, Iran 4-Department of Biodiversity, University of Limpopo, Turfloop Campus, Private Bag X1106, Sovenga, 0727 Polokwane, South Africa 5- Department of Fishery, Higher Education Institute of Applied Science& Technology of Jihad Agriculture.
Abstract: 
The Persian Gulf is of great economical, environmental and political importance, and includes around 205 species of fishes that only some of them have been studied parasitologically. From the order Pleuronectiformes ( ray-finned fishes), Psettodes erumei (Psettodidae), Pseudorhombus elevatus (Bothidae) and Brachirus orientalis (Soleidae) were selected for the survey. One hundred and forty eight fishes including 97 P. erumei, 43 P. elevatus and 8 B. orientalis were provided from two different regions of Iranian waters of the Persian Gulf and Oman Sea. From P. erumei, 4 species of nematodes, one cestode and one acanthocephal species are reported including: Philometra sp., Contracaecum sp., Pseudoterranova sp., Raphidascaris sp., Dasyrhynchus sp. (Trypanorhyncha) larvae and Serrasentis sagittifer. This is the first report of S. sagittifer in P. erumei from the Persian Gulf. P. elevatus had fewer species of parasites including one nematode, Contracaecum, one copepod, Heterochondria pillai and one digenea metacercaria Stephanostomum sp. Brachirus orientalis harbored one copepod and two digenea species, Allocreadium sp. and Lepocreadioides zebrini. Our research provides evidences that Indian spiny turbots have larger diversity of parasites than the deep flounders.
The nutritional suitability and cost effectiveness of rice polish and mustard oil cake as protein sources in the diet of Nile tilapia (Oreochromis niloticus) were studied. This study introduced rice polish as a plant protein source for Nile tilapia and three diets were formulated using rice polish (0, 10 and 20%) and mustard oil cake (10.0, 17.6 and 22.0%) for a feeding trail of eight weeks to observe the growth performance and feed utilization. The result was indicated that growth performance tended to decrease with increase in inclusion level of rice polish and mustard oil cake. The control diet (FM35) recorded the highest body weight gain (BWG) (363.79±59.32%) and the least (330.24±32.32%) was in diet FM25. Specific growth rate (SGR) was followed the same trend and no significant differences of SGR was observed among the diets (p P> 0.05). Feed intake (FI) of different diets was ranged between 30.33 g and 35.08 g per fish at the end of this experiment. Feed intake was also declined with the increase in inclusion level of rice polish, though the feed conversion ratio (FCR) and protein efficiency ratio (PER) were not significantly different (pP> 0.05) among the diets. The results of this study revealed that partial replacement of fish meal by rice polish and mustard oil cake would be cost effective without any significant change in growth performance.

Thursday 7 May 2015
Author: Hosseini S.H.1*; Alinezhad S.2; Mobedi I.3; Halajian A4.; Karimi E.1; Ahoo M.B.,1 Yasemi M.5
KeyWord: Pleuronectiformes, Fish, Parasites, Persian Gulf
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