Polyculture of silver barb, Puntius gonionotus (Bleeker), Nile tilapia, Oreochromis niloticus (L.), and common carp, Cyprinus carpio L., in Vietnamese ricefields: fish production parameters

Abstract

The fish production parameters of five polyculture combinations, consisting of small and large silver barb, Puntius gonionotus (Bleeker), small and large Nile tilapia, Oreochromis niloticus (L.), and small common carp, Cyprinus carpio L., fingerlings in three replicates, were investigated in a rice‐fish culture experiment (duration 149 days) conducted in the Mekong Delta, Vietnam. The survival rate was not significantly (P > 0.05) affected by the polyculture combination, but when grouped according to species, the mean survival of silver barb and tilapia was 64.3% and 63.7%, respectively, significantly higher than the mean common carp survival rate (33.4%). The growth of silver barb and tilapia was proportionally related to the stocking density, probably because of intraspecific competition and a synergistic interaction between silver barb and tilapia. The growth of common carp was not significantly different among the polyculture combinations. The highest net production (474.1 kg ha−1) was obtained in the polyculture combination consisting of 80% small‐sized silver barb fingerlings, but the fish was not marketable at that time. In concurrent rice‐fish culture, it is recommended to raise large silver barb fingerlings. Small tilapia can be polycul‐tured with silver barb, provided a stocking density lower than 1400 ha−1. Common carp is considered less suitable because of a limited tolerance for the water quality conditions in the ricefield and the large size required by the market.

Growth performance and use of natural food by Oreochromis niloticus (L.) in polyculture systems with Barbodes gonionotus (Bleeker) and Cyprinus carpio (L.) in intensively cultivated rice fields

“…From these first observations, it seems that O. niloticus is not exceptionally well suited for culture in rice fields. Also other authors (Haroon 1998; Rothuis et al . 1998c) noted that tilapia spp.…”

“…Rothuis et al . (1998c) suggested that there could be a synergistic growth effect between B. gonionotus and O. niloticus .…”

“…All plots were surrounded by a dyke, and had their own water inlet and outlet. A detailed description of the study area, experimental station, rice–fish field layout, soil and water resources and experimental results can be found in Rothuis et al . (1998b, c); Vromant, Rothuis, Cuc & Ollevier (1998) and Rothuis, Vromant, Xuan, Richter & Ollevier (1999).…”

Qualidade da água no consórcio de peixes com arroz irrigado

“…Esta ampla faixa de variação, característica da região sul do país, que apresenta estações bem definidas, não afetou a sobrevivência das espécies cultivadas neste experimento. Para ROTHUIS et al (1998), o desenvolvimento do arroz e o baixo nível da água tem um impacto no ambiente aquático, assim como no peixe. Freqüentemente a fertilização realizada cedo no ciclo da cultura do arroz e a baixa densidade de plantas neste estágio, estimula o desenvolvimento de fitoplâncton, principal responsável pelos altos níveis de oxigênio na água.…”

Impact of Aeration on the Growth Performance of Silver Barb, Puntius gonionotus, during Fingerling Rearing

“…Furthermore, survival in NA‐50 was although significantly lower than NA‐25, the fingerling recovery in terms of number was greater in the former which also yielded a significantly higher biomass (both gross and net yield/tank) than the latter. The fingerling size in NA‐50 (3.03 ± 0.14 g) was also large enough for stocking (Rothuis et al 1998). Thus, the study indicated that under non‐aerated condition, rearing the fry to fingerling at 50/m 2 (NA‐50) is advantageous over those at 25 and 75/m 2 .…”