Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Ingemar Ahlgren"'
Publikováno v:
African Journal of Ecology. 41:31-38
Labeo horie Heckel is increasingly becoming commercially important in Lake Chamo but its reproductive biology in the lake is not well enough to guide its management. Sex ratio, breeding season, length at first maturity and fecundity of L. horie were
Publikováno v:
SIL Proceedings, 1922-2010. 28:786-791
Fatty acid quality of seston and its effects on small fish in the lakes Xolotlan and Cocibolca, Nicaragua.
Autor:
Ingemar Ahlgren, Stina Drakare
Publikováno v:
SIL Proceedings, 1922-2010. 28:792-797
Factors controlling pelagic and sediment heterotrophic bacterial numbers and production in lakes.
Publikováno v:
SIL Proceedings, 1922-2010. 27:1740-1746
(2000). Pelagic food web interactions in Lake Cocibolca, Nicaragua. SIL Proceedings, 1922-2010: Vol. 27, No. 4, pp. 1740-1746.
Autor:
Ingemar Ahlgren, Demeke Admassu
Publikováno v:
Ecology of Freshwater Fish. 9:127-137
Age and growth of juvenile tilapia, Oreochromis niloticus, from Lakes Zwai, Langeno and Chamo (Ethiopia) were studied from microincrements in otoliths. Growth in length was best described by the Gompertz model. Average growth rate of the fish was mos
Publikováno v:
SIL Proceedings, 1922-2010. 26:429-434
Sediment microbial activity in temperate and tropical lakes, a comparison between Swedish and Nicaraguan lakes
Publikováno v:
Microbial Ecology. 34:131-143
The response of a sediment microbial assemblage to a pulse of diatoms was studied over 36 days by measuring bacterial activity and biomass, ATP concentration, and overall community respiration in laboratory microcosms. Also, the contribution of macro
Publikováno v:
Hydrobiologia. 288:1-12
The study on 10 lakes within the Ethiopian Rift Valley during March–May 1991 covered a range of conductivity (K25) between 286 and 49100 µS cm−1. HCO3 − — CO inf3 sup2− and Na+ were the dominant ions in all the lakes. Concentrations of K+,
Autor:
H. Sas, Ingemar Ahlgren
Publikováno v:
SIL Proceedings, 1922-2010. 24:247-251
(1990). Lake restoration by reduction of nutrient loading: Expectations, experiences, extrapolations. SIL Proceedings, 1922-2010: Vol. 24, No. 1, pp. 247-251.
Publikováno v:
SINET: Ethiopian Journal of Science. 28
Length-weight relationship, length at first maturity and sex ratio of the Nile perch Lates niloticus (L.) were studied from 342 fish samples collected between February 1995 and May 1996. The relationship between total length (TL ) and total weight (T