جستجوی مقالات مرتبط با کلیدواژه « faunistic » در نشریات گروه « شیلات »

The aim of this study was to investigate Trichoptera (arthropod) fauna in the Jajroud River. For this purpose, Trichoptera were collected from three stations (Hajiabad, Saeedabad and Khojir) in Jajroud River and were identified in terms of morphology and taxonomy using identification keys to the level of genus and species. Based on the results, four species of Macrostemum hestia, M. fenesrtratum, M. dohrni and Hydropsyche dolosa from the family Hydropsychidae were identified, which is the first reported in Iran and this river. The frequency of Trichopters in the study areas was very low in the winter months and was highest in June, July and August and then decreased.

Mayflies belonging to the order of Ephemeroptera compose of the most diverse and common inhabitants of aqua systems and are considered as biological and quality index. In this study, biodiversity of Ephemeroptera in Hablehrood River, east of Tehran Province, from 4 sampling points (Simindasht, Mazdaran, Khomedeh and Namrood) was studied. Samples collected weekly through June-September 2016. Samples collected manually by simple forceps from under the bottom rocks and transferred in Ethanol 70% to laboratory for further identification. Total frequencies of the identified genera were compared among different months and sampling points. Five different genera (Acentrella, Baetis, Centroptillum, Cloedes, Rhitrogena) belonging to two families, Baetidae and Heptagenidae, were collected from Hablehrood River, which Acentrella was the most frequent genus (49.7%). Results showed that the most frequency percentage of the collected samples belonged to Khomedeh station through both June and September. Mean number of collected samples of each genus showed no significant difference among different sampling months and sampling points. A part of Hableh Rud river that passes through Tehran province, has a valuable diversity of Ephemeroptera and it is needed to provide optimal habitat for its macrobenthose regarding rural and agricultural pollutions.

Chironmidae is one of the zoo-ecological unique group in the aquatic ecosystem. These insects are among the frequent larvae in shallow areas of the lakes, pools and road which has a dense cover of aquatic plants. This study was conducted to identify the Chironomidae living in Hablehrood stream. Sampling programmed seasonally for four selected pilots (Zarrindasht, Simindasht, KHomadeh and Enzaha) by dredge in three replications for each pilot in 2015. Samples were transferred in ethanol 70% to the laboratory. In the laboratory, larvae were separated from other substrate elements, after calcifying the samples, they were permanently fixed. Identification was done by use of available keys to genus level. The result showed that three genus hironomus, Polypedilum and Stritochironomus belonged to sub-family Chironominae were collected from Hablehrood.