STUDY OF MIGRATORY STURGEON CAPTURES IN ROMANIAN SIDE OF DANUBE RIVER MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER, No 3

Ciolac, A.

doi:10.15666/aeer/0301_073078

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Probably there is another cycle: the intensity of migration changes every 3 to 4 years [4]. The explanation of this fact could be the age structure of Danube shad flocks in which spawners of 2 (not so often) 3 and 4 years old are predominating as of more than 85%.…”

Section: DI Is Sc Cu Us Ss Si Io On Nmentioning

confidence: 99%

STRUCTURE OF DANUBE SHAD (Alosa pontica Eichwald, 1838) SPAWNER FLOCKS MIGRATING FOR REPRODUCTION IN DANUBE RIVER (MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER N o 2)

Ciolac

Patriche²

2004

Appl Ecol Env Res

View full text Add to dashboard Cite

A Ab bs st tr ra ac ct t. . The main purpose of this paper is to actualize last data on Danube shad (Alosa pontica Eichwald, 1838) migration process in Danube River. This species was widely studied last time in Danube River, but there are still some biological and ecological aspects to be revealed. Study of periodical changes in the total amount of capture and spawners structure could bring more and relevant information on presumed cyclic decrease and increase of stocks and also about the main causes of their interesting population dynamics. We try to examine some other aspects related to the spawning biology as well as to the biometry of different age-classes and also to link these issues to the last changes in environment conditions.

show abstract

Section: DI Is Sc Cu Us Ss Si Io On Nmentioning

confidence: 99%

STRUCTURE OF DANUBE SHAD (Alosa pontica Eichwald, 1838) SPAWNER FLOCKS MIGRATING FOR REPRODUCTION IN DANUBE RIVER (MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER N o 2)

Ciolac

Patriche²

2004

Appl Ecol Env Res

View full text Add to dashboard Cite

show abstract

“…This fact is supported worldwide by the previous studies that have called attention to the impact of hydropower dams on the fish fauna (Australia - Walker, 1985;Africa -Dowidar, 1988;Europe -1989;South America -Barthem et al, 1991;North America -Stanford and Nelson, 1994;Penaz et al, 1995;Ruiz, 1998;Worldwide -Henninger et al, 2000;Asia -Yi et al, 2010;). In Romania, authors like Bacalbaşa-Dobrovici (1989, 1999, Ioniță (1997), Ciolac (2004), Oțel (2007) and Molara and Man (2012) have analyzed both the effect of the hydropower dams Iron Gates I and II on fish fauna and the effect of embankments during the communist era with the aim of increasing the total agricultural area. This study aims to give an ecological characterization of the fish communities from the different Lower Danube river sectors in the context of their hydromorphological alterations.…”

Section: Introductionmentioning

confidence: 99%

Ecological Characterization of the Fish Communities Within Lower Danube River

Holban¹,

Danalache²,

Deák³

et al. 2020

CTNS

View full text Add to dashboard Cite

Evaluating the Effect of the Hydrotechnical Works from the Danube’s Caleia Branch on the Spawning Migration of Sturgeons

Danalache

Deák

Holban

et al. 2020

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Over the years, to maintain navigation along the Danube, the implementation of a series of hydrotechnical works was imposed in order to ensure the continuity of economic activities. Between 2011 and 2014, one such project was built in the vicinity of the county of Braila, on a secondary branch of the Danube - The Caleia branch. The main goal was to redistribute water discharge from the secondary channel to the main branch by construction of a bottom sill. The bottom sill and subsequent discharge redistribution led to hydrodynamic alterations caused by increased water current velocities. These modifications of the hydrodynamic regime may affect the migration of anadromous sturgeon species that swim from the Black Sea to spawn upstream, therefore making the monitoring of the impact paramount. Considering the fact that the anadromous migrating species are internationally protected species, by a series of agreements and conventions, and that the stocks of the species are still in decline, a complex monitoring program was implemented in the affected area. This study presents important information regarding the site utilization during spawning migration and an evaluation of the behavior of sturgeons tagged with ultrasonic transmitters that migrated upstream over the bottom sill. During the monitoring period, the studies show that five sturgeons passed the bottom sill during their upstream migration, swimming against maximum water current velocities of 2.5 m/s.

show abstract

STUDY OF MIGRATORY STURGEON CAPTURES IN ROMANIAN SIDE OF DANUBE RIVER MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER, No 3

Cited by 3 publications

References 0 publications

STRUCTURE OF DANUBE SHAD (Alosa pontica Eichwald, 1838) SPAWNER FLOCKS MIGRATING FOR REPRODUCTION IN DANUBE RIVER (MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER N o 2)

STRUCTURE OF DANUBE SHAD (Alosa pontica Eichwald, 1838) SPAWNER FLOCKS MIGRATING FOR REPRODUCTION IN DANUBE RIVER (MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER N o 2)

Ecological Characterization of the Fish Communities Within Lower Danube River

Evaluating the Effect of the Hydrotechnical Works from the Danube’s Caleia Branch on the Spawning Migration of Sturgeons

Contact Info

Product

Resources

About