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 fou...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 are 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.展开更多
A grid of 22 stations, giving a broad coverage of the spawning ground of anchovy in the southern Huanghai Sea was selected. Undis- turbed sediments were taken from sampling stations during the cruise in June 2003. The...A grid of 22 stations, giving a broad coverage of the spawning ground of anchovy in the southern Huanghai Sea was selected. Undis- turbed sediments were taken from sampling stations during the cruise in June 2003. The average abundance of meiofauna is (1 584± 686) ind./10cm2, with corresponding biomass (dwt) of (1 086±425)!μg/10cm2. The pattern of abundance of meiofauna is similar to the pattern of biomass. There are 65.88% meiofauna in 0￣2 cm sediments, 27.66% in 2￣5 cm sediments and 6.47% in 5￣8 cm sediments. The Spearman correlation analysis between meiofauna and environmental factors shows that abundance of meiofauna, free living ma- rine nematodes, benthic copepods has significant positive correlations with Chl-a. And the abundance of copepods has significant posi- tive correlations with several factors such as Chl-a, Pha-a, Chl-a plus Pha-a and organic matter. A total of 18 meiofauna groups are i- dentified. Nematode is the most dominant group, average abundance (1 404±670) ind/10cm2, accounting for 88.65%, and the follow- ing groups are also important: benthic copepods (5.48%), kinorhyncha (1.26%), polychaeta (1.07%). By biomass, dominant groups are nematodes (51.72%), polychaeta (21.84%), copepods (14.87%), ostracoda (4.92%), kinorhyncha (3.67%). A total of 90 species of ne- matodes are identified. The species composition of nematodes is listed based on selected two stations 7794 (coastal area) and 10694 (cold water mass in deep waters).展开更多
基金Supported by the DAAD(Deutscher Akademischer Austausch Dienst).
文摘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 are 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.
基金supported by the National Key Basic Research Programs from Ministry of Science and Technology of China under contract Nos G1999043709 and 2002CB412400the National Natural Science Foundation of China under contract No.40176033.
文摘A grid of 22 stations, giving a broad coverage of the spawning ground of anchovy in the southern Huanghai Sea was selected. Undis- turbed sediments were taken from sampling stations during the cruise in June 2003. The average abundance of meiofauna is (1 584± 686) ind./10cm2, with corresponding biomass (dwt) of (1 086±425)!μg/10cm2. The pattern of abundance of meiofauna is similar to the pattern of biomass. There are 65.88% meiofauna in 0￣2 cm sediments, 27.66% in 2￣5 cm sediments and 6.47% in 5￣8 cm sediments. The Spearman correlation analysis between meiofauna and environmental factors shows that abundance of meiofauna, free living ma- rine nematodes, benthic copepods has significant positive correlations with Chl-a. And the abundance of copepods has significant posi- tive correlations with several factors such as Chl-a, Pha-a, Chl-a plus Pha-a and organic matter. A total of 18 meiofauna groups are i- dentified. Nematode is the most dominant group, average abundance (1 404±670) ind/10cm2, accounting for 88.65%, and the follow- ing groups are also important: benthic copepods (5.48%), kinorhyncha (1.26%), polychaeta (1.07%). By biomass, dominant groups are nematodes (51.72%), polychaeta (21.84%), copepods (14.87%), ostracoda (4.92%), kinorhyncha (3.67%). A total of 90 species of ne- matodes are identified. The species composition of nematodes is listed based on selected two stations 7794 (coastal area) and 10694 (cold water mass in deep waters).
