Effectiveness of horizontally and vertically oriented wedge-wire screens to guide downstream moving juvenile chub (Squalius cephalus)
نویسندگان
چکیده
منابع مشابه
Gonadogenesis in chub Squalius (Leuciscus) cephalus (L. 1758).
The chub is an opportunistic, rheophilic cyprinid species and popular gamefish distributed throughout almost all of Europe, South Caucasus and part of Anatolia. It is most abundant in small rivers and large streams. The process of anatomical and cytological differentiation was analyzed in chub gonads. Material used in the study was derived from artificial spawning of adult individuals caught in...
متن کاملKaryotype analysis of chub, Squalius cephalus (Linnaeus, 1758) (Teleostei: Cyprinidae) from Karasu River, Erzurum, Turkey
The karyotypic characteristics of chub, Squalius cephalus have been investigated by examining metaphase chromosomes spreads obtained from gill and kidney tissues. The fish used in the study were caught with fishing nets from Dumlu Stream, one of the main tributaries of the Karasu River. The live fish were transported to the laboratory, kept in a well aerated aquarium before analysis and then...
متن کاملEffect of urban wastewater on age and growth of Chub Squalius cephalus (Linnaeus, 1758) in the Gheshlagh River, Sanandaj
In order to determine the age and growth of Chub in the Gheshlagh River of Sanandaj, two areas were selected; one in upstream of the river (Naysar; high water quality) and the other in downstream (Soaryan; impaired water quality). A total of 280 fish specimen were caught during four seasons. The overall male to female ratio was 1:1.86 in Naysar and 1:0.61 in Soaryan. Both ratios were significan...
متن کاملMetal Concentrations in Chub, Leuciscus Cephalus, from a Submontane River
In many aquatic environments elevated levels of trace elements occur due to anthropogenic activities. Water organisms can be precise indicators in estimating the status of pollution of water environments. Among them several species of fish have been widely used (Håkanson 1984, Chevreuil et al. 1995, Andres et al. 2000, Falandysz et al. 2000, Perkowska and Protasowicki 2000, Řehulka 2001, Wagner...
متن کاملkaryotype analysis of chub, squalius cephalus (linnaeus, 1758) (teleostei: cyprinidae) from karasu river, erzurum, turkey
the karyotypic characteristics of chub, squalius cephalus have been investigated by examining metaphase chromosomes spreads obtained from gill and kidney tissues. the fish used in the study were caught with fishing nets from dumlu stream, one of the main tributaries of the karasu river. the live fish were transported to the laboratory, kept in a well aerated aquarium before analysis and then...
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ژورنال
عنوان ژورنال: Ecological Engineering
سال: 2018
ISSN: 0925-8574
DOI: 10.1016/j.ecoleng.2018.07.038