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| Registros recuperados: 13 | |
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| Ponce-Marban, Donny; Hernandez, Juan; Gasca-Leyva, Eucario. |
| Tilapia culture in rural communities of the state of Yucatan, Mexico, has been increasing in recent decades. Polyculture of tilapia with other more commercially valuable species is an opportunity to substantially improve the economic yields of rural producers. The economic viability of implementing a Nile tilapia with Australian redclaw crayfish polyculture was analyzed using profitability indicators such as internal rate of return (IRR) and net present value of the investment (NPV). A bioeconomic model was developed to simulate three production densities (33/0, 33/20, tilapia and crayfish, respectively), accounting for investment recuperation in time horizons of 5, 10 and 15 years. The model includes a biological sub-model describing the growth of... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Economic Viability; Polyculture; Nile Tilapia; Australian Redclaw Crayfish; Yucatan; Mexico; Livestock Production/Industries; O13; Q22. |
| Ano: 2005 |
URL: http://purl.umn.edu/56080 |
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| Trung Cong, Luong; Lemonnier, Hugues; Hochard, Sebastien; Royer, Florence; Letourneur, Yves. |
| This study was conducted to compare the effects of shrimp and rabbitfish in mono- and polyculture stocked at high biomass on production and environmental conditions in a mesocosm system. Shrimp (14 g) and/or rabbitfish (19 g) were stocked in four treatments with different density but with the same total biomass (236 g m−2), including shrimp monoculture (SM) (17 shrimp m−2), shrimp–fish polyculture (SF) (11 shrimp and 4 rabbitfish m−2), fish–shrimp polyculture (FS) (6 shrimp and 8 rabbitfish m−2) and fish monoculture (FM) (12 rabbitfish m−2). After 10 weeks of experiment, shrimp survival and biomass were low in the treatments where shrimp were dominant (SM, SF), while rabbitfish survival and biomass were high in all the treatments. Shrimp mortality was... |
| Tipo: Text |
Palavras-chave: Polyculture; Penaeidae; Siganidae; Integrated production; Carrying capacity; Pond ecology. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00355/46606/46468.pdf |
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| Purcell, S; Patrois, Jacques; Fraisse, N. |
| The co-culture of juvenile sea cucumber Holothuria scabra (Jaeger), or 'sandfish', with juvenile blue shrimp Litopenaeus stylirostris (Stimpson) was tested by growing groups in co-culture and monoculture for 3 weeks in tanks with enriched sand substratum. Feed was supplied on trays, accessible only to shrimp. Survival of shrimp and sandfish was high in all treatments (73-100%). Growth of shrimp did not differ between monoculture and co-culture, but sandfish grew significantly slower in co-culture (P=0.03), although their sand burying and surface foraging were apparently unaffected by shrimp (P=0.76). However, shrimp increased the levels of total ammonia-N in tanks, which related inversely with sandfish growth (P=0.04). Conversely, sandfish did not appear... |
| Tipo: Text |
Palavras-chave: Burying behaviour; Ammonia; Sandfish; Holothurian; Polyculture. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1356.pdf |
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| Henry-Silva,G.G.; Maia,C.S.P.; Moura,R.S.T.; Bessa Junior,A.P.; Valenti,W.C.. |
| The aim of this study was to assess the feasibility of integrated multi-trophic culture of Nile tilapia (Oreochromis niloticus) and Amazon River prawn (Macrobrachium amazonicum) in brackish water by evaluating its limnological characteristics and economic performance. The experiment was completely randomized with four treatments and four repetitions: control treatment with Nile tilapia only, stocked with 2 tilapias/m² (P2C0) and three integrated multi-trophic culture treatments stocked with 2 tilapias/m² and prawns at densities of 4, 8 and 16 prawns/m² (P2C04, P2C08 and P2C16, respectively). The limnological variables of temperature, pH, dissolved oxygen, turbidity, ammonia, orthophosphate and chlorophyll "a" were evaluated and throughout the experiment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Sustainability; Polyculture. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000100265 |
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| Hussenot, Jerome. |
| The former extensive polyculture systems of marine fish farming, are today replaced mainly by intensive monoculture systems (salmon, shrimp). These systems, multiplied in the same coastal zone, can present a significant environmental impact. To treat and value fish farming effluents, new integrated systems were constructed and tested to different scales. Some examples of land- and seabased systems around the world are presented, in particular the European project of innovation "Genesis" in which several French public and private, national and regional organisations are participants (IFREMER, Regional Centre of Experiment and Aquacultural Applications in Poitou- Charentes, IDEE). Recommendations are supplied to promote the development of the integrated fish... |
| Tipo: Text |
Palavras-chave: Aquaculture durable; Polyculture; Systèmes intégrés; Contrôle des déchets; Sustainable aquaculture; Polyculture; Integrated systems; Waste management. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/00030/14171/11442.pdf |
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| Verschuere, L.; Rombaut, G.; Huys, G.; Dhont, J.; Sorgeloos, P.; Verstraete, W.. |
| The use of juvenile <i>Artemia</i> as feed in aquaculture and in the pet shop industry has been getting more attention during the last decade. In this study, the use of selected bacterial strains to improve the nutritional value of dry food for <i>Artemia</i> juveniles and to obtain control of the associated microbial community was examined. Nine bacterial strains were selected based on their positive effects on survival and/or growth of <i>Artemia</i> juveniles under monoxenic culture conditions, while other strains caused no significant effect, significantly lower rates of survival and/or growth, or even total mortality of the <i>Artemia</i> . The nine selected strains were used to preemptively colonize the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Biological control; Brine shrimp culture; Chemotaxonomy; Colonization; Feeds; Interspecific relationships; Nutrition; Polyculture; Survival; Artemia. |
| Ano: 1999 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4039 |
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| Oladosu, G.A.; Ayinla, O.A.; Onuoha, G.C.; Needom, J.G.. |
| A study of the performance of Clarias gariepinus (African Mudfish) in a polyculture with Oreochromis niloticus (Tilapia), integrated with broiler chicken production was carried at the African Regional Aquaculture Centre, Nigeria. Three experimrntal treatments were utilized. Treatment I was a polyculture of C. gariepinus and O. niloticus integrated with broiler chicken production, with application of supplemental feed to fish. Treatment II was a repeat of treatment 1, except that no supplemental feed was applied to fish, while treatment III was a polyculture of the two fish species per se with application of supplemental feed to fish. Results showed that the final individual weight, individual weight gain and recovery rate were best for C. gariepinus,... |
| Tipo: Report |
Palavras-chave: Fish culture; Polyculture; Fish culture; Http://aims.fao.org/aos/agrovoc/c_2918. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/2439 |
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| Anyanwu, P.E.; Awa, J.N.. |
| Polyculture trial of selected cultivable fin fishes was conducted at the Institute’s experimental fish farm Ikoyi, Lagos from April 1983 to January 1984. The species, Mugil spp; Tilapia spp; Hemichromis fasciatus and Elops lacerta gave a total annual production range of 1219 kg to 1441 kg per hectare (extrapolated). Tilapia species had the highest growth potential constituting 80% of the total harvest. Supplementary diet used was food left over (waste) from selected big hotels in Lagos. Elops lacerta (predator) recorded the highest average body weight of 415.88g while the lowest weight 62.14g, was recorded for Mugil spp. Tilapia spp and Hemichromis fasciatus had average body weights of 72.5g and 6.7 0g respectively. |
| Tipo: Report |
Palavras-chave: Fish culture; Polyculture; Fish culture; Http://aims.fao.org/aos/agrovoc/c_2918. |
| Ano: 1988 |
URL: http://hdl.handle.net/1834/2390 |
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| Ribeiro, Felipe de Azevedo Silva; CAUNESP; Preto, Bruno de Lima; UNESP; Fernandes, João Batista Kochenborger; UNESP. |
| Este trabalho objetivou comparar o desempenho produtivo de acarás-bandeira criados em aquários e em hapas em viveiros escavados dentro de estufa plástica em monocultivo e policultivo com camarão-da-amazônia, em duas densidades de estocagem (1,6 e 3,2 peixes 10-1 L). Utilizou-se delineamento inteiramente casualizado, em esquema fatorial 3x2, correspondendo a três sistemas de produção e duas densidades de estocagem, com quatro repetições por tratamento. Anova e teste de Tukey foram aplicados aos dados (α = 0,05). Os peixes produzidos nos viveiros em monocultivo e policultivo apresentaram mais que o dobro de ganho de peso, menor consumo de ração, melhor conversão alimentar, maior comprimento-padrão e uniformidade do lote em relação aos peixes mantidos em... |
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Palavras-chave: 5.04.05.00-4 Produção Animal camarão de água doce; Hapas; Policultivo; Peixes ornamentais; Sistema intensivo; Sistema semi-intensivo. Aquicultura freshwater prawn; Hapas; Polyculture; Aquarium fish; Intensive system; Semi-intensive system.. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/685 |
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| Klein, Ricardo Pablo; Somavilla, Alexandre; Köhler, Andreas; Cademartori, Cristina Vargas; Forneck, Eduardo Dias. |
| Wasps, important agents for the control of insect population, have been scantily studied in the Brazilian State of Rio Grande do Sul. Current study investigates monthly variations of social wasps in microhabitats within a forest-agriculture mosaic. Samples were collected between February 2013 and February 2014, through active search and baited traps made from 2 L transparent PET bottles, in five microhabitats, namely, forest, monoculture, polyculture and the edges between the forest fragment and monoculture and polyculture, in the municipality of Doutor Maurício Cardoso. Statistical tests, similarity indices, dominance and constancy as well as PCoA were used for data analysis to group the collection. A total of 953 specimens were collected, distributed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.05.02.00-1 forest fragment; Landscape; Northwest; Pesticides; Polyculture; Seasons.. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/27853 |
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| Teixeira,Ariany das Graças; Oliveira,Fábio Luiz de; Parajara,Magno do C; Zucoloto,Moises; Dalvi,Leandro P. |
| ABSTRACT Yacon is a crop which requires development of strategies for its cultivation. One of the possibilities is to introduce yacon in perennial crops using intercropping system. The aim of this study was to evaluate different planting densities of yacon grown in intercropping with corn under banana orchard, verifying its development and production. At 90 days after planting, morphological and physiological evaluations were done, at 210 days yacon was harvested, and its productivity calculated using the fresh tuberous root production. The Area Equivalence Index (IEA), and the Relative Contribution of Crops (CRC) to IEA were calculated. Yacon development and production were hampered by the corn intercropping (under the banana orchard), regardless of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Smallanthus sonchifolius; Spacing; Polyculture; Shading. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000100083 |
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| Registros recuperados: 13 | |
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