Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Jacques Boubée"'
Publikováno v:
The Science of the total environment. 748
Hydropower is an increasingly popular source of renewable and ‘green’ (in terms of emissions) energy, but reduced longitudinal connectivity and diverting flow through turbines can have negative impacts on catadromous anguillid eel species that ha
Publikováno v:
Ecological Engineering. 47:1-8
Upstream migration of fish through circular culverts is often prevented by velocities in the barrel being higher than that of the natural channel. In this investigation a computational fluid dynamic (CFD) model has been used to test the effects of va
Publikováno v:
Journal of Environmental Engineering. 137:854-857
In many situations the design of culverts prevents the upstream migration of fish because water velocity in the barrel is greater than that of the natural channel. One way to reduce the water velocity within the culvert is to install spoiler baffles
Publikováno v:
New Zealand Journal of Marine and Freshwater Research. 43:763-774
The effects of riparian manipulation in New Zealand are described for two case studies, one a short‐term study of the effects of the removal of riparian vegetation on fish, and the second, a long‐term study of the effect of re‐establishment of
Publikováno v:
Hydrobiologia. 609:71-82
Freshwater eels are in decline worldwide. In New Zealand, although longfin eels (Anguilla dieffenbachii) and shortfin eels (A. australis) are still amongst the most common freshwater fish species, there are concerns about the scarcity of large specim
Autor:
Jacques Boubée, Eddie J. Bowman, Alex Haro, Charles P. Mitchell, Dave W. West, Benjamin L. Chisnall
Publikováno v:
New Zealand Journal of Marine and Freshwater Research. 35:121-134
The downstream migrations of mature longfinned eels (Anguilla dieffenbachii Gray, 1842) and shortfinned eels (Anguilla australis Richardson, 1848) were investigated at Aniwhenua Dam on the Rangitaiki River between 1992 and 1998. Migrants were mostly
Publikováno v:
New Zealand Journal of Marine and Freshwater Research. 31:461-468
The pH values preferred and avoided by adult stages of inanga (Galaxias maculatus), common bully (Gobiomorphus cotidianus), common smelt (Retropinna retropinna), and redfinned bully (G. huttoni), were determined in a gradient tank (pH ranges of 3.2
Autor:
Fredrick J. Ward, Jacques Boubée
Publikováno v:
New Zealand Journal of Marine and Freshwater Research. 31:147-154
The feeding ecology of the common smelt, Retropinna retropinna, was determined at several locations on the Waikato River system. The mean size of the dominant prey was found to increase as smelt mouth gape increased. Smelt smaller than 40 mm total le
Publikováno v:
New Zealand Journal of Marine and Freshwater Research. 31:61-69
The avoidance response of the migratory juvenile stage of six species of diadromous fish to different levels of suspended solid (SS) was determined in the laboratory using a two‐choice avoidance tank. Trials were mostly conducted with resuspended s
Publikováno v:
New Zealand Journal of Marine and Freshwater Research. 28:399-407
Upper lethal and preferred temperatures were determined experimentally for eight common species of New Zealand freshwater fish. Upper lethal temperatures ranged between 28.3 and 39.7°C and preferre...