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pro vyhledávání: '"A.H. WEBB"'
Publikováno v:
Journal of Fish and Wildlife Management. 13:552-561
Skipped spawning, or variation in spawning periodicity, occurs in many annual spawning fish species and is an important consideration for population management. We assessed plasma sex steroid concentrations and measured gonad size and ovarian follicl
Autor:
John M. Trant, Grant W. Feist, Serge I. Doroshov, Martin S. Fitzpatrick, Carl B. Schreck, Molly A.H Webb, Joel P. Van Eenennaam
Publikováno v:
General and Comparative Endocrinology. 129:27-38
Ovarian follicles and plasma were collected from two female white sturgeon, Acipenser transmontanus, injected with sturgeon pituitary homogenate followed 12h later with GnRHa to induce ovulation. The oocytes of one female underwent germinal vesicle b
Autor:
Grant W. Feist, Martin S. Fitzpatrick, Carl B. Schreck, Joel P. Van Eenennaam, Molly A.H Webb, Javier Linares-Casenave, Serge I. Doroshov
Publikováno v:
Aquaculture. 201:137-151
Recently, commercial aquaculture farms in Northern California have exposed gravid, cultured white sturgeon females to cold water (12±1°C) throughout the late phase of vitellogenesis and ovarian follicle maturation resulting in improved ovulation ra
Publikováno v:
Fish Physiology and Biochemistry. 23:317-325
The in vitro effects of several steroids on the maturation of intact white sturgeon (Acipenser transmontanus) ovarian follicles were investigated. At the highest concentration (1024 ng ml−1 for the C21 steroids and 1139 ng ml−1 for the C19 steroi
Publikováno v:
Aquaculture. 176:315-329
Commercial sturgeon farms in California have observed poor spawning performance and ovarian regression in fish maintained at constant 16–20°C water temperatures. The effects of the pre-spawning thermal regime on oocyte germinal vesicle migration (
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Publikováno v:
Environmental Pollution. 102:635-639
Integrated assessment models such as the IIASA RAINS model have been used in developing pollution control policies in Europe over recent years. Large uncertainties occur in all subunits of such models, especially in energy scenarios, abatement costs,
Autor:
A.H. Webb, G.C. Hunter
Publikováno v:
Environmental Pollution. 102:283-288
New air quality guidelines and standards for the protection of human health have recently been produced by various UK and European advisory and regulatory bodies. The new standards for NO2 are more stringent than previously and have reawakened intere
Publikováno v:
Atmospheric Environment. Part B. Urban Atmosphere. 26:165-181
The CEGB and the Cathedrals Advisory Commission for England formed a Joint Working Party in 1985 to promote a research programme aimed at improving the understanding of the relationships between stone decay, atmospheric pollution and other factors. T
Autor:
A.T. Coote, M. Devenish, T.J.S. Yates, C.M. Hutchens, G.O. Lloyd, A.H. Webb, S.W. Massey, R.N. Butlin, I.S.C. Hughes, J.G. Irwin
Publikováno v:
Atmospheric Environment. Part B. Urban Atmosphere. 26:199-206
As part of a U.K. National Materials Exposure Programme, samples of stone and metals are being exposed at 29 sites for a minimum of 4 years. The sites were chosen to cover a wide range of environmental conditions, climate and topography. Information