Results 221 to 230 of about 78,615 (270)

The development of the sturgeon heart

Anatomy and Embryology, 2004
This paper presents a sequential analysis of the development of the sturgeon (Acipenser naccarii) heart from the end of gastrulation to the early juvenile stages. At late neurulation, the heart appears as a straight, short tube located over the endoderm that forms the wall of the yolk sac, in front of the developing head. The heart axis is aligned with
Valentín Sans-Coma, José M. Icardo, A. Guerrero, Alberto Domezain, Ana C. Durán, Elvira Colvee   +5 more
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The chromosomes of Italian sturgeons

Experientia, 1974
On presente l'etude caryologique des trois especes d'Esturgeons des eaux italiennes. L'especeHuso huso a un nombre diploide d'environ 116, dont 34 couples de chromosomes metacentriques et submetacentriques, 3 couples de chromosomes acrocentriques, et environ 38 microchromosomes.
F. Fontana, G. Colombo
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Duration and drift of larval lake sturgeon in the Sturgeon River, Michigan

Journal of Applied Ichthyology, 2002
Summary Recovery of lake sturgeon populations in the Great Lakes basin is now a focus of binational,federal,provincial,state and tribal management agencies; however,efforts to restore and rehabilitate stocks will be ineffective until early life history strategies are understood.
Nancy A. Auer, Edward A. Baker
openaire   +2 more sources

Chromosome banding in sturgeons

Journal of Applied Ichthyology, 1999
Summary The article reviews the present knowledge of chromosome banding in sturgeons and summarizes recent findings obtained by both classical banding techniques (C-banding, fluorescent and silver staining) and molecular methods, such as fluorescent in situ hybridization (FISH).
FONTANA, Francesco, ROSSI, Remigio, LANFREDI M, ARLATI G, BRONZI P.   +4 more
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Importance of habitat and migration to sturgeons with emphasis on lake sturgeon

Canadian Journal of Fisheries and Aquatic Sciences, 1996
Sturgeons utilize a variety of habitat types throughout their life: rivers for spawning; rivers, lakes, estuaries, or the sea for feeding and wintering adults; and estuarine areas for feeding young. Distances covered by some sturgeons during spawning migrations show a positive relationship to average adult size. The lake sturgeon, Acipenser fulvescens,
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Reply to Sturgeon

Ethics, 1985
Can I interchange the phrases 'it is rational to' and 'it makes sense to,' as I have been doing? It is primarily talk of what it "makes sense" to do, to feel, and to believe that concerns me here. Indeed for my purposes, I could drop talk of "rationality" altogether and speak only of its "making sense" to do and to feel certain things.
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