Results 141 to 150 of about 5,577 (169)

Comparative study of reproductive biology in single‐ and multiple‐spawner cyprinid fish. I. Morphological and histological features

Journal of Fish Biology, 1996
To clarify the dynamics and regulation of oogenesis in single‐ and multiple‐spawning cyprinid fish with group‐synchronous oocyte development, a multidisciplinary approach to their reproduction was undertaken using three species from the River Meuse (Belgium): the roachRutilus rutilusas a single spawner, and the bleakAlburnus alburnusand the white ...
J. Rinchard, P. Kestemont
openaire   +2 more sources

Comparative study of reproductive biology in single and multiple-spawner cyprinid fish. II. Sex steroid and plasma protein phosphorus concentrations

Journal of Fish Biology, 1997
The dynamics and regulation of oogenesis in single and multiple‐spawner cyprinid fish showing group‐synchronous oocyte development, was investigated in three species from the River Meuse (Belgium): the roach Rutilus rutilus as a single spawner, and the bleak Alburnus alburnus and the white bream Blicca bjoerkna as multiple spawners. This paper compares
J. Rinchard, P. Kestemont, R. Heine
openaire   +2 more sources

Liver Changes Related to Oocyte Growth in Roach, a Single Spawner Fish, and in Bleak and White Bream, Two Multiple Spawner Fish

International Review of Hydrobiology, 2003
AbstractThe objectives of this study were to compare the seasonal hepatic activity and to evaluate whether this activity was related to the dynamics of oocyte recruitment in three cyprinids from the River Meuse (Belgium): the roach Rutilus rutilus as a single spawner, and the bleak Alburnus alburnus and the white bream Blicca bjoerkna as multiple ...
Rinchard, Jacques, Kestemont, Patrick
openaire   +2 more sources

Seasonal variations in egg and larval quality in two multiple-spawner cyprinid fish, the bleak Alburnus alburnus and the white bream Blicca bjoerkna

River Systems, 2001
Variations in egg and larval quality along the reproductive season have been investigated in two multiple-spawner cyprinid fish (the bleak Alburnus alburnus and the white bream Blicca bjoerkna) by successive samplings of breeders in the River Meuse. Morphological and biochemical criteria were used to determine the quality of the ova. Larval quality was
P. Kestemont   +3 more
openaire   +1 more source

Cumulative effects of multiple sources of bias in estimating spawner–recruit parameters with application to harvested stocks of Chinook salmon (Oncorhynchus tshawytscha)

Fisheries Research, 2006
Abstract Previous studies of bias in estimating spawner–recruit relationships have usually focused on a single source of bias, and have typically found bias that tends to overestimate productivity and underestimate optimal population size. However, many of these studies have used simulated data contrived to maximize the bias.
openaire   +1 more source

Thinking outside the box: non-canonical targets in multiple sclerosis

Nature Reviews Drug Discovery, 2022
Orhan Aktas, Tobias Ruck, Michael Roden
exaly  

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