The Regression of Sturgeons in Southern Europe

Hernando, J. A.; Domezaín, A.; Zabala, Cristina Zoco; Cabrera, Remedios; Domezain, J.; Soriguer, Milagrosa C.

doi:10.1007/978-1-4020-8437-9_1

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…Anadromous species, but in sea remain in costal/estuarian waters (with depts at 10-40 m), while in freshwaters occupy large deep rivers (Bronzi et al 2022). Hernando et al (2009) reported presence of a landlocked population in the Ticino River. Reproduction occurs from May to July, on sandy and muddy substrate, with a rapid water flow (Bronzi et al 2022).…”

Section: Species Description Biology and Habitatmentioning

confidence: 97%

“…Between dorsal and lateral scutes, there are many small granuliform/star-shaped bony denticles (Kottelat and Freyhof 2007). Maximal body length and maximal body weight are 200 cm and 90 kg, respectively, while the average length is 100-180 cm (Hernando et al 2009;Freidrich et al 2018). Maximal age is over 50 years, while the age of first reproduction of males and females is 6-8 years and 8-13 years, respectively (Kottelat and Freyhof 2007;Freidrich et al 2018).…”

Section: Species Description Biology and Habitatmentioning

confidence: 99%

“…Essentially, they maintained their present traits (homing behavior, longevity, late maturation, and low fecundity) for more than 200 million years, establishing regular and abundant populations through the Northern Hemisphere. They survived glaciations and mass extinction events, while adapting to different living conditions from cold environment of Siberia and North America to warm Mediterranean waters (Hernando et al 2009;Jarić et al 2011a). Since all sturgeons are migratory (anadromous or potamodromous) and spawn in freshwater, they are particularly vulnerable and extremely susceptible to anthropogenic impact, such as fisheries, habitat pollution, and alteration of their migratory routes (Freidrich et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Past and Future of Sturgeon Species (Acipenseridae) in Western Balkans: Case for Permanent Conservation or Sustainable Management

Cvijanović,

Đikanović,

Galambos

et al. 2023

Fish &Amp; Fisheries Series

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Sturgeon species in Western Balkans are mainly occupying the Danube River basin, which represents one of the centers for sturgeon diversity. Although there are numerous negative anthropogenic impacts (habitat fragmentation, pollution, fishery pressure) on sturgeons, constructions of hydropower dams in the Iron Gate area severely decreased their natural spawning habitats and only sterlets have a viable population upstream from Iron Gate 2 dam. Review of the status and population trends based on available statistics, pollution impact, composition and change in their diet, the impact of invasive species, as well as restocking and ex situ conservation programs will be presented. Assessment of legislation and sturgeon protection projects and their impact on wild sturgeon populations will be discussed.

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Section: Species Description Biology and Habitatmentioning

confidence: 97%

Section: Species Description Biology and Habitatmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Past and Future of Sturgeon Species (Acipenseridae) in Western Balkans: Case for Permanent Conservation or Sustainable Management

Cvijanović,

Đikanović,

Galambos

et al. 2023

Fish &Amp; Fisheries Series

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“…Sturgeons (Acipenseriformes) are relict fauna representatives, they appeared in the Lower Jurassic Period, 200 million years ago and survived various natural disasters of our planet. They are currently on the verge of extinction, some species have become extinct in several countries, where the measures to preserve these species were not taken [2,3]. The high marketable value of sturgeon is the main reason for their illegal catch that leads to a sharp decrease in their population [4,5].…”

Section: Introductionmentioning

confidence: 99%

Ichthyotrophological and Ichthyopathological Analysis of Bester (Acipencer Nikoljukinii)

Shalgimbaуeva

2023

EJE

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The paper presents the results of ichthyotrophological and ichthyopathological studies of the besterhybrid, which is of a significant importance among sturgeon fish. The purpose of the research work is to study the food spectrum of bester, bred in the pond and to study the external environment influence on the fish.Sturgeon is a promising form of modern aquaculture. In addition, sturgeon fish currently undergo mass extinction and their population decline sharply every year, so the interest in their commercial breeding has increased. In 2001, four countries of the Caspian Sea -Kazakhstan, Turkmenistan, Azerbaijan, and Russia (except Iran) imposed a temporary ban on catching sturgeon. This ban was imposed by the UN requirement within the framework of CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora). The problem was solved by the breeding of besters which are hybrid species produced from mating male sterlet and female huso. To carry out research bester hybrid fish was delivered from the Halyk Balyk pond farm in 2021. The absolute length of the studied 15 fish ranged from 12.7 to 30.1 cm, and their maximum weight ranged from 11.38 to 110.4 g. Ichthyological, ichthyotrophological and ichthyopathological analysis was carried out during the study. Standard numerical-weight and special histological methods were used for the study. Ichthyotrophological studies revealed that the fullness index was higher than 30.75%00. The studies showed a high level of nutrients in the reservoir and the absence of negative external environment influence on fish.

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