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| Registros recuperados: 34 | |
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| Kluijver, M.J. de. |
| During 1985 and 1986, sublittoral communities on hard substrates in the southern Delta area, SW Netherlands, were investigated at 79 stations. The stations were distributed over 20 localities situated in the saline Lake Grevelingen, the Oosterschelde estuary and the SE North Sea. The percentage cover of all sessile organisms were estimated using quadrat sampling techniques; data were processed using cluster analysis. The stations were characterized by the assessment of the most important environmental parameters: available light, hydrodynamics and sediment characteristics. Eight sublittoral communities on hard substrates are described by characteristic and dominant species. Three communities are subdivided into variants on account of differences in... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Sublittoral; Hard substrate; Communities; Environmental parameters; Netherlands. |
| Ano: 1989 |
URL: http://www.repository.naturalis.nl/record/503862 |
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| González,Nirson; Lasso,Carlos; Rosales,Judith. |
| Fish assemblage structure and variability were analyzed in two floodplain lagoons (Las Arhuacas and Los Cardonales) along the lower Orinoco over a hydrological cycle. Every three months during continuous three-day sampling, experimental gill nets (5 to 12.5 cm of mesh opening) and 1 mm-mesh seine nets were utilized according to the types of habitats presents. A total of 133 fish species were found in Las Arhuacas and 95 species in Cardonales. Fifty five and 17 species were exclusive to Las Arhuacas and Los Cardonales respectively, and 77 were common to both lagoons. In Las Arhuacas, the most speciesrich orders were Characiformes, Siluriformes, Perciformes and Gymnotiformes and in Los Cardonales, the most species-rich orders were Characiformes,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Neotropical; Freshwater; Communities; Seasonality; Venezuela. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400022 |
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| Randrianasoavina, F.. |
| Traditional fisheries in Madagascar provide the main source of livelihood for over 100,000 fishermen from 1250 communities along 5,000 kms of coast. The fishery provides 50% of the Malagasy fish catch and supplies 70% of the fish locally consumed. Despite this, the sector is not recognised officially, and is marginalised from mainstream national economic development. Since 1995 a group of Malagasy NGOs, supported by European NGOs, have been drawing public attention – both locally and internationally – to this situation. Over the last 6 years they have carried out a number of programmes both locally and internationally. These have involved studying and documenting the traditional sector, organising formal meetings between representatives from traditional... |
| Tipo: Conference Material |
Palavras-chave: Fishermen; Communities; Http://aims.fao.org/aos/agrovoc/c_50182. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/864 |
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| Wétohossou, C.Z.; Satia, B.P.. |
| Being involved in artisanal fisheries activities, women have become unavoidable actors in the socio-economic development of West African countries. And yet, despite this key role, the importance of their contribution is often not well known. Thus, in 1995, IDAF Programme set up a Working Group on women's key role and issues related to gender in fishing communities. This group, composed of eleven women, all distinguished scientists and rural development experts in the sub-region, undertook ten case studies in fourteen (14) regions in eight countries. It also organized two meetings for an in-depth thought about women's effective involvement in fishing communities. |
| Tipo: Working Paper |
Palavras-chave: Role of women; Communities; Http://aims.fao.org/aos/agrovoc/c_15513; Http://aims.fao.org/aos/agrovoc/c_50182. |
| Ano: 1997 |
URL: http://hdl.handle.net/1834/399 |
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| Benin, Samuel; Gebremedhin, Berhanu; Smale, Melinda; Pender, John L.; Ehui, Simeon K.. |
| On farm conservation of crop diversity poses obvious policy challenges in terms of the design of appropriate incentive mechanisms and possible trade-offs between conservation and productivity. This paper compares factors explaining the inter-specific diversity (diversity among species) and infra-specific diversity (diversity among varieties within a species) of cereal crops grown in communities and on individual farms in the northern Ethiopian highlands. Using named varieties and ecological indices of spatial diversity (richness, evenness, and inverse dominance), we find that a combination of factors related to the agro-ecology of a community, its access to markets, and the characteristics of its households and farms significantly affect both the inter-... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Household Farms; Communities; Ethiopia; Agrobiodiversity; On Farm Conservation; Crop Production/Industries. |
| Ano: 2003 |
URL: http://purl.umn.edu/16101 |
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| Silva,Otávio Guilherme Morais da; Fernandes,Tae Tanaami; Silva,Rogério Rosa da; Souza-Campana,Débora Rodrigues de; Morini,Maria Santina de Castro. |
| ABSTRACT Ants can use twigs from fragments of tree branches as a nesting resource. The present study analyzed gatherings of ants in twigs of Albizia niopoides, a Fabaceae native to the Atlantic Forest that is used in landscaping in parks and squares in Brazil. Expeditions were performed in an urban park located in Atlantic Forest areas between February and June 2014. A total of 70 twigs with ants were collected and included 9357 workers, 2309 broods ants, 68 winged ants and 19 queens. Four subfamilies, 10 genera and 17 species/morphospecies were recorded. The species with the largest number of nests were Nylanderia sp.1, Hypoponera sp.4, and Wasmannia auropunctata. Ants of different species were found coexisting in the same twig, and Pheidole gr. tristis... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Communities; Nesting; Urban park; Transient nests; Atlantic Forest. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262016000200182 |
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| Cechin,Sônia Zanini; Martins,Marcio. |
| The effectiveness of pitfall traps associated with drift fences to capture amphibians and reptiles in three field studies, in Rio Grande do Sul (extreme southern Brazil), São Paulo (São Paulo, southeastern Brazil), and Amazonas (Amazonas, northern Brazil) is described. At Santa Maria, a total of 2040 amphibians and reptiles were caught in 30 pitfalls (200 L, with drift fence) during 18 months of study (capture efficiencies of 3.78 amphibians and reptiles/pitfall/month and 0.14 snake/pitfall/month). At Itirapina, São Paulo, 1262 amphibians and reptiles were obtained in 72 pitfalls (100 L, with drift fence) during six months (capture efficiencies of 11,9 amphibians and reptiles/pitfall/month and 0,38 snake/pitfall/month). At Rio Pitinga, Amazonas, over 600... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Traps; Communities; Lizards; Snakes; Amphibians; Herpetofauna; Brazil. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000300017 |
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| Marinoni,Renato C.. |
| The beetles are a useful group for studies on trophic structure of communities, mainly in forested areas. These kind of studies are based on food habits of species groups. The different terms applied to nomminated these groups (trophic category, ecologic group, trophic group, guild, trophic guild) are discussed. The term trophic group, a natural unity, is proposed to form a group of species with the same food habits, not considering the trophic level. The guild, an artificial unity, is recognized as an important tool to group organisms group that use the same resources as defined by the investigator (Hawkins & MacMaiion, 1989; Simberloff & Dayan 1991; Wilson 1999). The known alimentary habits of Coleoptera are classified in five trophic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coleoptera; Trophic groups; Guilds; Communities; Trophic structure. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100024 |
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| WINCK,GISELE R.; HATANO,FABIO; VRCIBRADIC,DAVOR; VAN SLUYS,MONIQUE; ROCHA,CARLOS F.D.. |
| ABSTRACT Communities are structured by interactions of historical and ecological factors, which influence the use of different resources in time and space. We acquired data on time of activity, microhabitat use and diet of a lizard assemblage from a sand dune habitat in a coastal area, southeastern Brazil (Restinga de Jurubatiba). We analyzed the data of niche overlap among species in these three axes (temporal, spatial and trophic) using null models. We found a significant overlap within the trophic niche, whereas the overlap for the other axes did not differ from the expected. Based on this result, we discuss the factors acting on the structure of the local lizard community. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Null models; Communities; Sand dune habitat; Lizards; Brazil. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200677 |
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| Arango,Claudia P.; Solano,Oscar D.. |
| Soft bottom megabenthic communities have been poorly studied in the Caribbean Sea. In this study we describe the structure and species composition of a Crustacea-Mollusca megafaunal community based on beam trawl samples taken between 13 and 60 m depth at the southwestern region of Santa Marta, Colombian Caribbean. Classification and ordination analyses using abundance data of crustaceans and molluscs produced two main groups (A and C), which seem to be controlled by depth and sediment characteristics. Group A consisted of species collected at the deeper stations and high content of silts (between 30 and 60 m depth) and exhibited the highest density and biomass mean values. The decapod Chasmocarcinus cilindricus was found as the characteristic species for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Megafauna; Soft bottoms; Communities; Caribbean; Colombia. |
| Ano: 1999 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97611999000100008 |
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| FERREIRA,R. L.; HORTA,L. C. S.. |
| Species richness, abundance, distribution and similairity between cave invertebrate communities were compared among seven caves located in the Peruaçu River valley, north of Minas Gerais State, Brazil. Such comparisons aimed to determinate the degree of biological complexity in the sampled caves, calculated by the "Index of Biological Complexity in Caves", presented in this manuscript. The presence of potencial or real impacts on the cave fauna was also investigated. A total of 1,468 individuals belonging to 57 families of: Acarina, Pseudoscorpionida, Araneida, Opilionida, Amblypygi, Isopoda, Geophilomorpha, Scutigeromorpha, Spirostreptida, Coleoptera, Collembola, Diptera, Dictyoptera, Ephemeroptera, Ensifera, Heteroptera, Hymenoptera, Lepidoptera,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caves; Communities; Impacts; Invertebrates; Peruaçu River. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100003 |
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| Registros recuperados: 34 | |
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