BIOLOGICAL ASPECTS OF MAIN MARINE MIGRATORY STURGEONS IN ROMANIAN DANUBE RIVER MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER, No 4

Ciolac, A.

doi:10.15666/aeer/0302_101106

Cited by 4 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The beginning of the decline in ratio in sample 7 is in the annulus that corresponds to age 11, and the minimum value is at the annulus corresponding to age 13. These values are in accordance with the values provided by most authors for the age at maturity of beluga males (Bacalbaşa-Dobrovici 1991;Reinartz 2002;Ciolac and Patriche 2005;Bloesch et al 2006). However, these are all only gradual declines in ratio, covering several annuli, which might imply slow movement of these individuals from the more open sea towards the river mouth, where the water is more brackish, prior to the actual spawning migration.…”

Section: Discussionsupporting

confidence: 91%

“…The drop of the Sr:Ca ratio in samples 1-3 & 7 near the end of the transect might be the result of a spawning migration. The decrease in ratio in samples 2 and 3 corresponds to age 12-16, which is in accordance with the age of first reproduction of the Russian sturgeon females, given by most authors (Bacalbaşa-Dobrovici 1991;Reinartz 2002;Ciolac and Patriche 2005;Bloesch et al 2006). In sample 1, the decrease in Sr:Ca ratio however occurred somewhat later, approximately after age 18.…”

Section: Discussionsupporting

confidence: 87%

See 1 more Smart Citation

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

Jarić¹,

Lenhardt²,

Pallon

et al. 2010

Environ Biol Fish

View full text Add to dashboard Cite

Sturgeon populations in the Danube River have experienced severe decline during the last several decades, mostly due to the poorly regulated fishery, river fragmentation and water pollution. This study focuses on gaining better understanding of sturgeon life history primarily by addressing the assessment of microelement accumulation in sturgeon pectoral fin rays, especially of strontium and calcium, as a method that can reveal migration patterns of anadromous sturgeons. Analysis was performed on pectoral fin samples of three anadromous Danube sturgeon species (beluga, Russian sturgeon and stellate sturgeon) by the use of a Nuclear Microprobe technique. The most frequent pattern in analyzed samples was represented by a low Sr:Ca ratio in the innermost annuli, followed by an increased ratio in the middle annuli segment, and often with a decreased ratio in the outermost annuli. Probability density estimate has revealed three distinguished maxima of the Sr:Ca ratio, 7.08×10 −3 , 8.98×10 −3 and 9.90× 10 −3 , which might correspond, respectively, to fresh, brackish and saltwater. Although the analysis of the Sr:Ca ratio in sturgeon pectoral fin rays has revealed changes that might indicate probable migration between habitats with different water salinity, further studies are needed for improvement of this method. This study represents the first analysis of this kind that was conducted on sturgeon species from the Black Sea basin.

show abstract

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 87%

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

Jarić¹,

Lenhardt²,

Pallon

et al. 2010

Environ Biol Fish

View full text Add to dashboard Cite

show abstract

“…Length and weight composition indicators of the species in the Southern Black Sea are similar to the Northwest Black Sea‐Danube delta. According to the obtained results studied on this area, the maximum length weight parameters of these three species, A. stellatus, A. gueldenstaedtii and H. huso , differed from other (Vassilev and Pehlivanov, 2003; Ciolac and Patriche, 2005). However, the length and weight distribution ranges of the A. stellatus are a little different than the other two species.…”

Section: Resultsmentioning

confidence: 81%

A participatory approach to tagging and monitoring as an initial step in developing a sturgeon conservation strategy along the Turkish Black Sea Coast

Tırıl

Zengin

Akbulut

et al. 2011

Journal of Applied Ichthyology

View full text Add to dashboard Cite

The objective of this study was to organise a national mechanism that would allow to effectively promote and control the gentle handling and release of accidentally caught sturgeons with the participation of the fishery while at the same time testing the effectiveness of such measures through tagging and continuous monitoring. A second objective was to develop through this exercise a participatory conservation strategy for sturgeons which is jointly executed by the research institutions, governmental agencies and commercial fishery. The samples of Acipenseridae which were captured accidentally in the fishing nets from the commercial fishers were released to sea after tagging with plastic T-bar tag and all the information about the fish species such as fish weight and length, capture locality, depth were recorded. Within these applications, carried out in collaboration with the Fisheries Cooperatives and fishermen in the Black Sea region, 99 fish (9, 22, 48 and 20 for the years 2006-2009, respectively) were tagged and released to the sea. Five of the tagged fish were re-captured and released again after recording the information on the tags.

show abstract

“…Both sturgeons and salmonids are of crucial importance for Romanian fauna, having also a significant socio-economic value. In this context, well documented studies regarding the biology, taxonomic classification and ecology of the species were performed [10,28,[30][31][32]. The development of technologies based on DNA markers has had a tremendous impact on animal genetics in generally, and changed the way in which studies were conducted inclusive in population genetics, phylogeny, phylogeography and conservation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Genetic Diversity in Fish Using Molecular Markers

Dudu¹,

Georgescu²,

Costache³

2015

Molecular Approaches to Genetic Diversity

View full text Add to dashboard Cite

Their extinct relatives (Infraclass Chondrostei) date to the Devonian (about 350 million years ago) and Acipenser fossils were found in the Western of North America dating from Upper Cretaceous. At present time within Acipenseriformes only two families exist, Acipenseridae and Polyodontidae, the first one counting 25 species inhabiting rivers, lakes, coastal waters and inner seas from the Northern hemisphere. The Acipenseriformes species are strictly Northern hemisphere fishes, some being resident to fresh water, while others are anadromous. Sturgeons are reunited in Acipenseridae family with four genera-Acipenser, Huso, Scaphirhynchus and Pseudoscaphirhynchus.

show abstract

BIOLOGICAL ASPECTS OF MAIN MARINE MIGRATORY STURGEONS IN ROMANIAN DANUBE RIVER MIGRATION OF FISHES IN ROMANIAN DANUBE RIVER, No 4

Cited by 4 publications

References 0 publications

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

Insight into Danube sturgeon life history: trace element assessment in pectoral fin rays

A participatory approach to tagging and monitoring as an initial step in developing a sturgeon conservation strategy along the Turkish Black Sea Coast

Evaluation of Genetic Diversity in Fish Using Molecular Markers

Contact Info

Product

Resources

About