Polyculture of Pacific fat sleeper (Dormitator latifrons) with red tilapia (Oreochromis spp.) and freshwater prawn (Macrobrachium rosenbergii) in production ponds
Since many of the species used for aquaculture purposes are exotic and without considering the degree of alteration that they can cause in ecosystems and native species, this study was carried out with the aim of introducing a native species such as Dormitator latifrons to traditional pond aquacultu...
Salvato in:
| Autore principale: | |
|---|---|
| Altri autori: | , |
| Natura: | article |
| Lingua: | spa |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | https://revistas.utm.edu.ec/index.php/aquatechnica/article/view/5450 |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
Aggiungi Tag | Riassunto: | Since many of the species used for aquaculture purposes are exotic and without considering the degree of alteration that they can cause in ecosystems and native species, this study was carried out with the aim of introducing a native species such as Dormitator latifrons to traditional pond aquaculture systems. Polyculture systems with species of higher commercial value have provided a useful strategy for the development of sustainable aquaculture of native fish. For this reason, this study evaluated the yield of production and growth of D. latifrons in polyculture with red tilapia (Oreochromis spp.) and freshwater prawn (Macrobrachium rosenbergii) in Costa Rica. Juveniles with initial weights of 36.5 g ± 7.7 for D. latifrons, 14.2g ± 7.5 for tilapia and 13.1 g ± 8.4 for prawns were used during the experimental phase carried out in 2 ponds divided into 3 sections of 24 m2. The organisms were randomized using a treatment with 3 replicas in polyculture composed of 42 D. latifrons (1.75 Ind/m2), 34 tilapias (1.42 Ind/m2) and 27 prawns (1.12 Ind/m2), while the control was used, by triplicate, with 30 D. latifrons in monoculture at a stocking density of 1,25 Ind/m2. The polyculture of D. latifrons with tilapia and prawns had a detrimental effect on the growth of the fish which demonstrates a negative interaction between them, with competition for space and food. Dormitator latifrons can adapt to artificial feeding and compete with other species such as tilapia in the juvenile stage, but does not show the same behavior as it grows which could explain the fall in growth in the last 9 weeks in polyculture with more individuals in the pond. The productivity of polyculture, in terms of the final biomass achieved, was considerably higher than in monoculture as more organisms were stocked and harvested. |
|---|