Consulta: creatorFacets:"Moreau, Jacques"
Registros recuperados: 7
Data/hora: 10/06/2024 09:07:28

Diel feeding periodicity, daily ration and relative food consumption in some fish populations in three reservoirs of Sri Lanka
Provedor de dados: 5
Autores: Weliange, Wasantha S.; Amarasinghe, Upali S.; Moreau, Jacques; Villanueva, Ching-maria.
Twelve diel surveys were carried out in three reservoirs of Sri Lanka viz. Minneriya, Udawalawe and Victoria, to investigate diel feeding patterns, daily ration and relative food consumption in fish populations. Stomach content weights of different size classes of various fish species in the three reservoirs in 12 diel surveys were analysed using an iterative method, MAXIMS. Predominantly herbivorous or detritivorous fish species such as Amblypharyngodon melettinus and Oreochromis niloticus exhibited one peak in the diel feeding pattern. Two peak feeding periods were evident in predominantly insectivores and/or zooplanktivores (e. g., Puntius chola and Rasbora daniconius) and interestingly in macrophyte feeders (i.e., Etroplus suratensis, Puntius...
Tipo: Text
Palavras-chave: Cichlidae; Cyprinidae; Trophic modelling; Freshwater fish; Feeding chronology; Diel feeding pattern.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2134.pdf

Enzymatic Hydrolysis of Yellowfin Tuna (Thunnus albacares) By-Products Using Protamex Protease
Provedor de dados: 5
Autores: Nguyen, Thi-my-huong; Sylla, Khalifa Serigne Babacar; Randriamahatody, Zo; Donnay-moreno, Claire; Moreau, Jacques; Luyen Thi Tran,; Berge, Jean-pascal.
Long-term proteolysis of tuna by-products (head, viscera and tail) by the wide spectrum protease Protamex has been investigated and compared. After hydrolysis, two fractions (soluble aqueous phase and insoluble sludge) were collected. Chemical compositions of each fraction and molecular mass distributions of soluble peptides were determined. Degrees of hydrolysis obtained after 12 h of hydrolysis of head, viscera and tail were 32.3, 16.8 and 22.2 %, respectively. Nitrogen recovery in the soluble fractions was 73.6 % for the head, 82.7 % for the viscera and 85.8 % for the tail. Lipid distribution indicated that the majority of lipids remained in the sludge. Such proteolysis appears useful for the production of very different fractions: one rich in peptides...
Tipo: Text
Palavras-chave: Tuna; By-products; Proteolysis; Nitrogen recovery; Fish protein hydrolysates.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00030/14142/14042.pdf

A mass-balance Ecopath model of Coastal Areas in the Mekong Delta, Vietnam
Provedor de dados: 5
Autores: Van, Mai Viet; Phuong, Nguyen Thanh; Dinh, Tran Dac; Villanueva, Ching-maria; Moreau, Jacques.
A mass-balance Ecopath model of coastal areas in the Mekong Delta has been constructed for a quantitative description of the trophic structure of the ecosystem. The model is used to estimate the important biological parameters and relationships among the different ecologically important groups. The model is based on the data collected from bottom trawling. There are 14 functional groups based on 58 species from coastal areas in the Mekong Delta survey such as shrimps, squids, crabs, mackerel, small pelagics, demersal fishes, benthic feeders, predator fishes and trash fish. The biomass value was estimated from catch production and bottom trawling surveys. Results show that the estimated total biomass of exploited resources was 3.99 ton.km-2. The values of...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00143/25419/23570.pdf

Exploratory analysis of possible management strategies in Lake Victoria fisheries (Kenyan sector) using the recent Ecosim software
Provedor de dados: 5
Autores: Moreau, Jacques; Villanueva, Ching Maria.
New developments in Ecosim, which is part of the well known Ecopath software have allowed the user to evaluate the effects of a range of possible fisheries management strategies for the Lake Victoria fisheries. The software is also used in this report to explore the fisheries and fish community of Lake Victoria. In particular, management strategies are explored aimed at achieving specified socio-economic objectives, including maximising the economic value of the ecosystem and maximising employment by altering the pattern of fishing effort by the fishing fleets comprising the Lake Victoria fishery. Further, the same approach was used to consider optimal management strategies from an ecological perspective.
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00143/25420/23571.pdf

A comparison of various fitting techniques for predicting yield for the Ubolratana reservoir (Thailand) from a time series data on catch and hydrological features
Provedor de dados: 5
Autores: Moreau, Jacques; Lek, Sovan; Leelaprata, Wattana; Sricharoendham, Boonsong; Villanueva, Ching-maria.
Actual catch (commercial catch and local consumption) have been made available by the Royal Thai Department of Fisheries for the Ubolratana reservoir, North East Thailand, since the impoundment of the lake in 1965. The data have been used to assess the possible relationship between the actual catch and morphometric parameters of the lake (maximum area, depth, shore line, difference between maximum and minimum area) and actual catch the year before. A comparison of the predictive power is carried out between multiple linear regression analysis, a generalised additive model, a regression tree analysis, an autoregression analysis and an artificial neural network. Results show the poorly predictive power in linear system (around 40% of explained variances),...
Tipo: Text
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00177/28875/27360.pdf

Poaching/preservation: the case of the Meru National Park, Kenya
Provedor de dados: 5
Autores: Villanueva, Ching-maria; Jenkins, Mark; Moreau, Jacques.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00160/27108/25287.pdf

Fish Assessment in the Rehabilitation Polders of Prey Nup (Cambodia)
Provedor de dados: 5
Autores: Lim, Puy; Villanueva, Ching-maria; Chhouk, B; Chay, K.k.; Brun, J.m.; Moreau, Jacques.
Physical restoration of dykes and water gates along the shorelines of the Prey Nup area was done in 1998 to preserve rice field areas from being washed-off during high tides. The four first polders constructed resulted in the recuperation of about 5,500 ha for rice field cultivation. Before the rehabilitation, the area was also a common dwelling place for freshwater, brackish water and marine fish species (43 species). Information regarding effects of seasonal variations on species richness and stock assessment were obtained from capture surveys of native fishermen using 11 different kinds of fishing gears from 1998 to 2001. The influence of rehabilitating the area on the fish community species richness, stock recruitment and dynamics were investigated....
Tipo: Text
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00143/25422/23574.pdf