Age and growth determination of Lower Danube sturgeon species Huso huso and Acipenser stellatus

In the Lower Danube, sturgeon populations have declined dramatically in recent decades. Although efforts have been made at the legislative level since 2006, by forbidden commercial fishing, an assessment of stocks and conservation status of sturgeon species has not yet been made [1]. In this context...

Full description

Saved in:
Bibliographic Details
Published inIOP conference series. Earth and environmental science Vol. 616; no. 1; pp. 12032 - 12038
Main Authors Raischi, Marius, Deák, György, Oprea, Lucian, Raischi, Natalia, Danalache, Tiberius
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2020
Subjects
Acipenser stellatus
Age
Chronology
Commercial fishing
Confidence intervals
Conservation
Conservation status
Data collection
Growth rate
Huso huso
Populations
Spawning
Species
Sturgeon
Sustainability management
Tagging
Online AccessGet full text

Cover

More Information
Summary:In the Lower Danube, sturgeon populations have declined dramatically in recent decades. Although efforts have been made at the legislative level since 2006, by forbidden commercial fishing, an assessment of stocks and conservation status of sturgeon species has not yet been made [1]. In this context, it is necessary to estimate the age and growth rate of sturgeon species in order to establish their current conservation status, with a high level of confidence. This article presents the long-term results obtained by INCDPM during 6 years of research in which were captured and released 108 specimens of beluga (Huso huso) and 193 specimens of stellat sturgeon (Acipenser stellatus). Thus, before the ultrasonically tagging of the sturgeon specimens, informational volumes regarding the biometric parameters were collected simultaneously with the gender determination [1]. Based on the collected data and the calculus hypotheses, it was possible to determine the ages of the sturgeon specimens and to perfect the method of improving the confidence level of the data obtained from the in-situ investigations. In order to foster sustainable management of Danube sturgeon populations, it is essential to carry out assessments with a high degree of confidence of the age of anadromous sturgeon species. The quantification of the population depends on species spawning cycles taking into account that they are characterized by high longevity.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/616/1/012032