The Experts below are selected from a list of 249 Experts worldwide ranked by ideXlab platform
M. Sheidai - One of the best experts on this subject based on the ideXlab platform.
-
Karyotype of Aphanius sp. from Iran
Nucleus, 2002Co-Authors: M. Seyfali, B. Kiabi, M. SheidaiAbstract:Somatic metaphase in Aphanius sp. (Cyprinodontidae) from Iran showed 2n = 24 chromosomes with a formula of 5M + 11 m + 1 sm + 7t.
Hamid Reza Esmaeili - One of the best experts on this subject based on the ideXlab platform.
-
Incidence of Lernaea (Crustacea: Copepoda) parasitic in the Mashkid River Basin, Southeast of Iran
International Journal of Aquatic Biology, 2014Co-Authors: Mohammad Hashem Malekzehi, Hamid Reza Esmaeili, Halimeh Zareian, Zahra Farahani, Abdolrahim PaziraAbstract:In the present investigation, Lernaea parasite was reported in the examined fish species, collected from the Mashkid River basin, Southeast of Iran in 2012 and 2013. Lernaea parasites were isolated from the external surface of eye, fins, operculum and body of the Bangana dero, Cyprinion microphthalmus, Gonorhynchus diplocheilus (Cyprinidae), Aphanius dispar (Cyprinodontidae), Channa gachua (Channidae) in different water bodies. The highest infection was found in native fish, B. dero with nine parasites in single specimen. The exotic fishes were not infected.
-
Survey on ectoparasites of Aphanius sophiae (Cyprinodontidae) from
2013Co-Authors: Mohammad Taghi Rahimi, Hamid Reza Esmaeili, Zeynab Gholami, Iraj Mobedi, Mohammad Reza YoussefiAbstract:Objective: To determine the infesation of Aphanius sophiae (A. sophiae) with ectoparasite for the first time from Iran as a little attention has been paid to parasitic infection of A. sophiae which is an native species found in the endorheic Kor River Basin, Fars Province, Southern Iran. Methods: A total of 70 A. sophiae (35 males and 35 females) were collected using dip net in May 2010 from Ghadamgah Spring-stream, Southern Iran. After fixation, the external surface of each fish was examined for ectoparasite through stereomicroscope. Results: Out of 70 fish specimens, two females (2.86%) were infected with three Lernaea spp. copepod or anchor worm. The ectoparasite prevalence rate, intensity and abundance were estimated 2.860, 1.500 and 0.043 respectively. Conclusion: This study reports infestation of A. sophiae by Lernaea spp. for the first time in Iran. Further parasitological investigations a re required to determine ectoparasites of A. sophiae in different parts of Iran due to its importance and numerous epizootics occurring among the most important farmed fish in various parts of the world.
-
Infection of Aphanius sophiae (Actinoptrygii: Cyprinodontidae) with Tetracotyle sp.
2011Co-Authors: Zeinab Gholami, Iraj Mobedi, Mostafa Akhlaghi, Hamid Reza EsmaeiliAbstract:During the study on the biology of Aphanius sophiae, a total of 20 fish specimens were collected in September 2007 using dip net at a depth of 30 - 50 cm in downstream of spring and preserved them in 10 % formalin in spot until examination. The fish were dissected and the ear cavity was examined to determine the presence of parasites of which 4 specimens including 4 females were infected with Tetracotyle sp. metacercariae, a trematode which in its metacercarial stage may infect a wide range of freshwater fish species. These metacercariae were positioned into cavity of inner ear membrane of infected fish. Our data showed that the infection was higher in females than males also as the number of parasites increases in fish ear, the size of parasites decreases. The prevalence of the infection with Tetracotyle sp. was 20 %, the parasite intensity was 2.5 and the parasite abundance was 0.5 in A. sophiae. Cercariae of Tetracotyle sp. infect fish by direct penetration. Two fish were infected with 3 parasites and other fish had 2 parasites in their ears, separately. This shows that even the inner ear is not exempted from the attacks of trematodes. This is the first report of Aphanius sophiae infection with Tetracotyle sp. metacercariae.
-
First Karyological Analysis of an Endemic Fish, Isfahan Tooth-carp, Aphanius isfahanensis (Actinopterygii: Cyprinodontidae) from Iran
Journal of Applied Animal Research, 2008Co-Authors: Hamid Reza Esmaeili, Mehrgan Ebrahimi, A. Teimory, T. H. AnsaryAbstract:Abstract Esmaeili, H.R., Ebrahimi, M., Teimory, A. and Ansary, T.H. 2008. First karyological analysis of an endemic fish, Isfahan tooth-carp, Aphanius isfahanensis (actinopterygii: Cyprinodontidae) from Iran. J. Appl. Anim. Res., 73–76. The karyotype of Isfahan tooth-carp, Aphanius isfahanensis has been investigated by examining metaphase chromosomes spreads obtained from gill epithelial and kidney cells. The diploid chromosome number of this species was 2n=48. The karyotype consisted of 6 pairs of submetacentric and 18 pairs of subtelocentric chromosomes. The arm number (NF) was 30. Sex chromosomes were cytologically indistinguishable in this tooth-carp.
Andrew P Shinn - One of the best experts on this subject based on the ideXlab platform.
-
gyrodactylus salinae n sp platyhelminthes monogenea infecting the south european toothcarp aphanius fasciatus valenciennes teleostei Cyprinodontidae from a hypersaline environment in italy
Parasites & Vectors, 2011Co-Authors: Giuseppe Paladini, Tine Huyse, Andrew P ShinnAbstract:Background Historically, non-native species of Gambusia (Poeciliidae) have been used to control larval stages of the Asian tiger mosquito, Stegomyia albopicta Reinert, Harbach et Kitching, 2004 throughout Italy. The potential utility of indigenous populations of Aphanius fasciatus (Valenciennes) (Teleostei: Cyprinodontidae) as an appropriate alternative biological control is currently being explored. A sub-sample of ten fish collected from Cervia Saline, Italy (salinity 65 ppt; 30°C) to assess their reproductive capability in captivity, harboured a moderate infection of Gyrodactylus von Nordmann, 1832 (Platyhelminthes, Monogenea). A subsequent morphological and molecular study identified this as being a new species.
Wolfgang Villwock - One of the best experts on this subject based on the ideXlab platform.
-
Die Titicaca-See-Region auf dem Altiplano von Peru und Bolivien und die Folgen eingeführter Fische für Wildarten und ihren Lebensraum
Naturwissenschaften, 1993Co-Authors: Wolfgang VillwockAbstract:In the course of a long-term case study (since 1960) the interaction between different exotic fish (salmonids, atherinids) on the endemic ichthyofauna (genus Orestias : Cyprinodontidae) introduced to the interandean basin of Lake Titicaca was observed. The contribution deals not only with the actual consequences which endanger endemic species but also the socio-economic effects on the native Indian population, both causing further ecological problems in the region of concern.
Frank G. Nordlie - One of the best experts on this subject based on the ideXlab platform.
-
Influences of body mass, temperature, oxygen tension, and salinity on respiratory oxygen consumption of cyprinodontoid fishes of three families
Reviews in Fish Biology and Fisheries, 2013Co-Authors: Frank G. NordlieAbstract:This review evaluates the current state of knowledge of influences of body mass, ambient temperature, PO2, and salinity on routine metabolic rates of members of three families, Fundulidae, Cyprinodontidae, and Poeciliidae, belonging to the order Cyprinodontiformes. The study was motivated by Winberg’s (Fisheries Research Board of Canada, Translation Series No. 194. Distributed by the Fisheries Research Board of Canada Biological Station, Nanaimo, BC, 1960) conclusion that the Cyprinodontiformes (Winberg included only live-bearing poeciliids) generally have lower metabolic rates that do other fishes. Based on available information Winberg’s conclusion was borne out that live-bearing freshwater poeciliids show lower than average routine metabolic rates compared to other freshwater fish groups. This is also true of poeciliids from saline waters, and of both freshwater and saline-water members of the related families Fundulidae and Cyprinodontidae. However, considerable variation in metabolic patterns was noted within and among these three families. There were geographic variations between subspecies of some species. Some island groups/species showed lower routine metabolic rates than did allied mainland groups/species. Thermal responses (Q10 values) in routine metabolic rates of these fishes showed variations with geographic location, PO2, salinity and size. Values of PO2crit were altered among species by temperature, body size/age, and possibly salinity. Influences of ambient salinity on routine metabolic rates of these cyprinodontoid fishes also showed variations with temperature and size/age of individuals. The patterns of metabolic responses in these cyprinodontoid fishes to environmental conditions were generally similar to those of other species. Unfortunately, the available information on these fishes lacks the uniformity that would allow for critical and quantitative comparisons between and among the cyprinodontoids and with other species.
