Consulta: subjectFacets:"Polyculture"
Registros recuperados: 13
Data/hora: 09/06/2024 04:16:46

Estructura y diversidad arbórea en sistemas agroforestales de café en la Sierra de Atoyac, Veracruz.
Provedor de dados: 32
Autores: García Mayoral, Luis Eduardo.
La Sierra de Atoyac se encuentra dentro de las áreas consideradas prioritarias para la conservación de la biodiversidad en Veracruz, en esta región la pérdida de la vegetación original es amortiguada por algunos sistemas agroforestales de café (SAF-café) que conservan un número considerable de especies arbóreas. Para fundamentar  lo anterior se caracterizaron tres SAF-café: rusticano (RU), policultivo complejo (PC), policultivo simple (PS), así como una selva mediana subperennifolia (SM), al establecer tres unidades de muestreo (UM) por sistema, en dos franjas altitudinales (600-900 y 900-1200 msnm) para un total de 24 UM de 600 m2 cada una, en donde se registraron todos los árboles con un diámetro normal (DN) ≥ a 2.5 cm. Se calcularon índices...
Palavras-chave: Policultivo; Índices estructurales y de diversidad; Especies arbóreas; Selva mediana subperennifolia; Polyculture; Structural and diversity indices; Tree species; Semi-evergreen tropical forest; Forestal; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2379

Yacon planting density in intercropping with corn under banana orchard
Provedor de dados: 75
Autores: 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

Experimental evaluation of co-culture of juvenile sea cucumbers, Holothuria scabra (Jaeger), with juvenile blue shrimp, Litopenaeus stylirostris (Stimpson)
Provedor de dados: 5
Autores: 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

Feasibility of polyculture of blue shrimp Litopenaeus stylirostris and goldlined rabbitfish Siganus lineatus in a mesocosm system
Provedor de dados: 5
Autores: Luong, Trung Cong; Hochard, Sebastien; Royer, Florence; Lemonnier, Hugues; Letourneur, Yves.
The study was conducted to (1) estimate the effects of polyculture of blue shrimp Litopenaeus stylirostris with goldlined rabbitfish Siganus lineatus on production, environmental quality and water and sediment metabolism and (2) to determine if blue shrimp and goldlined rabbitfish polyculture is possible. The experiment was carried out for 12 weeks in a mesocosm system that consisted of 12 circular outdoor mesocosm fiberglass tanks (1.7 m2, 1275 L water volume). Shrimp (2.9 g) were randomly stocked at density of 15 shrimp.m− 2 without rabbitfish (control), with rabbitfish (25.5 g) at low density (1.2 fish.m− 2) (LDRB) and high density (2.4 fish.m− 2) (HDRB). Results indicated that goldlined rabbitfish S. lineatus did not affect shrimp growth performance....
Tipo: Text
Palavras-chave: Polyculture; Penaeidae; Siganidae; Integrated production; Environment; Pond ecology.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00198/30968/29344.pdf

Effects of blue shrimp     Litopenaeus stylirostris     and goldlined rabbitfish     Siganus lineatus     in mono- and polyculture on production and environmental conditions
Provedor de dados: 5
Autores: 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

Les systèmes intégrés en aquaculture marine : une solution durable pour un meilleur respect de l’environnement littoral
Provedor de dados: 5
Autores: 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

Polyculture trial of mullets (Mugil spp) tilapia sp.,hemichromis sp. and elops sp.
Provedor de dados: 20
Autores: 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

Performance of Clarias gariepinus in a polyculture with Oreochromis niloticus.
Provedor de dados: 20
Autores: 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

Microbial control of the culture of &lt;i&gt;Artemia&lt;/i&gt; juveniles through preemptive colonization by selected bacterial strains
Provedor de dados: 27
Autores: Verschuere, L.; Rombaut, G.; Huys, G.; Dhont, J.; Sorgeloos, P.; Verstraete, W.
The use of juvenile &lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; 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 &lt;i&gt;Artemia&lt;/i&gt; . 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

Economic Viability of Polyculture of Nile Tilapia and Australian Redclaw Crayfish in Yucatan State, Mexico
Provedor de dados: 31
Autores: 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

Sistemas de criação para o acará-bandeira (Pterophyllum scalare) - DOI: 10.4025/actascianimsci.v30i4.685
Provedor de dados: 2
Autores: 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...
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

Space-time variation in the composition, richness and abundance of social wasps (Hymenoptera: Vespidae: Polistinae) in a forest-agriculture mosaic in Rio Grande do Sul, Brazil
Provedor de dados: 3
Autores: 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

Integrated multi-trophic culture of Nile tilapia (Oreochromis niloticus) and Amazon river prawn (Macrobrachium amazonicum) in brackish water
Provedor de dados: 45
Autores: 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