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Articles by J. Moreau
Total Records ( 2 ) for J. Moreau
  L. Tah , K.S. Da Costa , V.N. Douba , J.N. Kouassi and J. Moreau
  Artisanal gillnet fishery was investigated in Ayamé I reservoir during a survey of 12 months. Mean value of Catch Per Unit Effort (CPUE) was 9.23±5.18 kg of fish per trip. Both commercially important tilapiine species, Sarotherodon melanotheron and Oreochromis niloticus, constituted >57% of gillnet catches. The von Bertanlanffy growth parameters (L and K) computed from length-frequency data through the FiSAT software were (L = 35.3 cm and K = 0.4 year-1) for O. niloticus and (L∞ = 33 cm and K = 0.55 year-1) for S. melanotheron. Resources status analysis by comparison of fishing mortality rates F with the target [(Fopt) and limit (Flimit)] ones, biological reference points indicated that S. melanotheron is overfished whereas, O. niloticus is exploited close to the optimum level. These results allowed us to suggest some management strategies for sustainable exploitation of the studied tilapiine stocks in the reservoir.
  T.D. Dinh , J. Moreau , M.V. Van , N.T. Phuong and V.T. Toan
  The population dynamics of eight commercial species of shrimp (Haliporoides sibogae, Harpiosquilla harpax, Metapenaeus affinis, Metapenaeus brevicornis, Metapenaeus tenuipes, Parapenaeopsis cultrirostris, Parapenaeopsis gracillima and Parapenaeus maxilipedo) distributed in littoral marine zone of the Mekong Delta were investigated. Length-based stock assessment using FiSAT II software package was used to assess the growth and mortality parameters: Asymptotic size (L8), growth coefficient (K), total (Z) and natural (M) mortality, exploitation rate (E), recruitment pattern, current probability of capture and selectivity of fishing gears. Yield-per-recruit analyses were carried out showing different levels of the exploitation. Results showed that the maximum sustainable yield would be reached for an exploitation rate higher than the current one for each population. However, the size of first capture should be increased for every population. The findings indicated that the current exploitations of shrimp populations distributed in littoral marine zone of the Mekong Delta are under exploitation level for maximum sustainable yield; however, all the shrimp populations are subject to growth over-exploitation.
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