نتایج جستجو برای: great sturgeon

تعداد نتایج: 226587  

ژورنال: توسعه آبزی پروری 2023

In this study, growth performance, gonadosomatic index (GSI), and gonadal histology of beluga (Huso huso) and Persian sturgeon (Acipenser persicus) were investigated for 12 months. Sixty individuals of fifteen-month old beluga and Persian sturgeon with body mean weight of 781±55 g and 469.5±38 g, respectively, were distributed in the concrete tanks (5×1×1 m) with water capacity of 2.5 m3 in tri...

Journal: :Respiration physiology 1978
W W Burggren

Measurements of branchial cavity water pressures and flow patterns, arterial blood PO2 and pH, and oxygen utilization and uptake have been made in undisturbed, free swimming sturgeon, Acipenser transmontanus. Although the jaws are degenerate and the oral apparatus is highly modified for feeding, gill ventilation is nonetheless powered by a buccal force pump and an opercular suction pump common ...

Journal: :Diseases of aquatic organisms 2014
Thomas B Waltzek Debra L Miller Matthew J Gray Bruce Drecktrah Jeffrey T Briggler Beth MacConnell Crystal Hudson Lacey Hopper John Friary Susan C Yun Kirsten V Malm E Scott Weber Ronald P Hedrick

In 2009, juvenile pallid sturgeon Scaphirhynchus albus, reared at the Blind Pony State Fish Hatchery (Missouri, USA) to replenish dwindling wild stocks, experienced mass mortality. Histological examination revealed extensive necrosis of the haematopoietic tissues, and a virus was isolated from affected organs in cell culture and then observed by electron microscopy. Experimental infection studi...

2014
Elisa Boscari Jose Martin Pujolar Isabelle Dupanloup Riccardo Corradin Leonardo Congiu

In species with long life cycles and discontinuous availability of individuals to reproduction, implementing a long-term captive breeding program can be difficult or impossible. In such cases, managing diversity among familiar groups instead of individuals could become a suitable approach to avoid inbreeding and increase the possibility to accomplish a breeding scheme. This is the case of sever...

Journal: :Fish & shellfish immunology 2011
Dušan Palić Linda S Beck Jelena Palić Claire B Andreasen

Studies of innate immunity in fish species of special concern are essential for better understanding of their health status during hatchery rearing conditions. The cytochemical and morphological characterizations of blood granulocytes have been used to provide information about phylogenetic differences and determine the potential use of neutrophil function assays. Rapid, simple, cytochemical st...

Journal: :PLoS ONE 2007
Mark B. Bain Nancy Haley Douglas L. Peterson Kristin K. Arend Kathy E. Mills Patrick J. Sullivan

BACKGROUND More fish have been afforded US Endangered Species Act protection than any other vertebrate taxonomic group, and none has been designated as recovered. Shortnose sturgeon (Acipenser brevirostrum) occupy large rivers and estuaries along the Atlantic coast of North America, and the species has been protected by the US Endangered Species Act since its enactment. METHODOLOGY/PRINCIPAL ...

Journal: :Journal of animal science 2015
P Fedorov B Dzyuba G Fedorova R Grabic J Cosson M Rodina

Sturgeon spermatozoa maturation during their passage through the kidney is a prerequisite for initiation of motility. Samples of sterlet () testicular sperm (TS) were matured in vitro by incubation in seminal fluid (SF) or in SF supplemented with carbonyl cyanide -chlorophenyl hydrazone (CCCP; a respiration uncoupling agent). Sperm was diluted in activation medium (AM) containing 10 m Tris-HCl ...

Journal: :The Journal of biological chemistry 2001
P B Danielson M T Hoversten M Fitzpatrick C Schreck H Akil R M Dores

The elucidation of the cDNA sequence for sturgeon proorphanin provides a unique window for interpreting the evolutionary history of the opioid/orphanin gene family. The molecular "fossil" status of this precursor can be seen in several ancestral sequence characteristics that point to its origin as a duplication of either a prodynorphin- or proenkephalin-like gene. The sturgeon proorphanin cDNA ...

2016
Bryan C. Chakoumakos Brenda M. Pracheil Ryan P. Koenigs Ronald M. Bruch Mikhail Feygenson

Otoliths, calcium carbonate (CaCO3) ear bones, are among the most commonly used age and growth structures of fishes. Most fish otoliths are comprised of the most dense CaCO3 polymorph, aragonite. Sturgeon otoliths, in contrast, have been characterized as the rare and structurally enigmatic polymorph, vaterite-a metastable polymorph of CaCO3. Vaterite is an important material ranging from biomed...

Journal: :progress in biological sciences 2011
mahtab yarmohammadi mohammad pourkazemi1 ahmad ghasemi mohammad hassanzadeh fereidoon chakmehdouz

the late sexual maturity in sturgeon and the absence of morphological differences between males and females makes sex discrimination difficult. identification of sex at an early life stage is of high interest in caviar production because it allows efficient selection of females. in this study, the genome of 10 mature male and 10 mature female specimens of persian sturgeon (acipenser persicus...

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