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| Registros recuperados: 196 | |
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| Vanhove, S.; Beghyn, M.; Van Gansbeke, D.; Bullough, L.W.; Vincx, M.. |
| Under the typical high-latitude conditions of temperature, productivity and settlement of chlorophyll and phaeophytin to the sediment, many benthic organisms in the Antarctic show strong seasonal variation. Although meiofauna comprise an important component of the southpolar benthic ecosystem, our knowledge of them is limited. The metazoan meiofauna and the surrounding sediments were studied fortnightly for 18 mo in a shallow bay at Signy Island (Factory Cove, South Orkneys, Antarctica) to test whether and how the temporal variability of the environment influenced meiobenthos dynamics. By examination of the distribution of the abundance and biomass of the total community, the density of higher taxonomic groups, and of individual dominant nematode genera... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Benthos; Biomass; Population density; Seasonal variations; Sediment analysis; Trophic relationships; Copepoda [copepods]; Nematoda [Nematodes]; Ostracoda. |
| Ano: 2000 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6138 |
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| Fishar, M.R.A.; Ali, M.H.H.. |
| Concentrations of major metals (Na, K, Ca, Mg) and some trace metals (Fe, Zn, Mn, Ni, Cu, Co, Pb, Cr, Cd) were determined in water, sediment, benthos and some common fish species from Lake Qarun. Water and sediment samples were collected from seven stations where, the benthos and fish species were collected from three sites representing east, middle and west of the lake. Distribution of studied metals showed that, east part generally had higher contamination than west one which may be attributed to the impact of pollution sources in this area which coming from El-Batts Drain and pumping station in the east part. Mollusca and Crustacea especially Barnacles have the highest concentrations of most heavy metals measured more than Polychaeta which make them... |
| Tipo: Journal Contribution |
Palavras-chave: Lake Qarun; Trace metals; Benthos; Fish SEDIMENTS Absorption coefficient Accumulation Biochemical analysis Benthic fish Trace metals Absorption http://aims.fao.org/aos/agrovoc/c_27. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1215 |
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| TAOUIL,ANDRÉ; YONESHIGUE-VALENTIN,YOCIE. |
| A Baía de Guanabara no decorrer da ocupação de suas margens sofreu uma continua degradação, levando-a a grandes modificações em seu entorno e a inúmeros danos ambientais. Além de uma significativa alteração paisagística, ocorreu também uma queda na qualidade de suas águas, devido ao lançamento de grande quantidade de efluentes não tratados (domésticos e industriais). Este trabalho teve como objetivo inventariar a flora algácea da praia de Boa Viagem (Niterói, RJ), compará-la com levantamentos realizados há três décadas. Os resultados mostraram desaparecimento de 30 táxons (49%) outrora existentes no início da década de 70 e o aparecimento de 14 espécies (23%). A flora atual é dominada por Ulva fasciata Delile e Enteromorpha compressa (L.) Nees, espécies... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Benthos; Flora; Guanabara Bay; Organic pollution; Seaweeds. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000004 |
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| Sankaré, Y.; Etien, N.. |
| Cet article présente les résultats d'une étude comparative de trois séries de prélèvements dans la zone proche du canal de Bassam avant, 6 mois et 20 mois après son ouverture en septembre 1987. Les effets constatés sont la diminution de l'abondance et la modification de la composition de la macrofaune benthique. Ces effets semblent de longue durée, sans reprise en ce qui concerne l'espèce la plus abondante, Corbula trigona. Les changements observés dans la structure des peuplements sont dus essentiellement à l'augmentation de la salinité, et à un degré moindre, aux modifications de la nature du sédiment. |
| Tipo: Journal Contribution |
Palavras-chave: Benthos; Channels; Estuaries. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/5521 |
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| Piñero, R.A.. |
| La costa patagónica y en especial el golfo San Jorge (Mar Argentino, Atlántico sudoccidental), son zonas de gran interés pesquero, destacándose este último por poseer una de las especies de mayor valor comercial del Mar Argentino: el langostino patagónico Pleoticus muelleri. En un nuevo concepto de análisis integrado, se estudia la relación de los recursos con su ambiente. En el caso particular del langostino, dado su hábito bentónico, resulta de importancia acceder al conocimiento sobre las distintas especies que conforman las comunidades bentónicas y sus interrelaciones. El estudio de las comunidades bentónicas del Golfo San Jorge ha sido realizado por Roux et al. (1995, 1997) consistiendo principalmente en la confección de un amplio inventario... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Taxonomy; Benthos; Ecological associations; Abundance; Feeding behaviour. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/5031 |
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| González, J.; Tapia, C.; Wilson, A.; Stotz, W.; Orensanz, J.M.; Parma, A.M.; Valero, J.; Catrilao, M.; Garrido, J.. |
| En la III y IV Regiones las áreas de manejo y explotación de recursos bentónicos (AMERB) se han establecido como la principal herramienta de manejo del recurso loco (Concholepas concholepas). Sin embargo, su aplicabilidad para la administración y aporte en términos del desarrollo sustentable, aunque sugerentes, requieren de una evaluación objetiva, en cuanto al manejo de carácter discreto que se ha establecido para cada AMERB, desconociendo la eventual interacción espacial de las mismas. En este marco, se desarrolla una aproximación para evaluar el desempeño de las AMERBs desde una perspectiva integral bajo un enfoque metapoblacional. Si bien el estudio está orientado a proporcionar la información de campo que permita probar la hipótesis de metapoblaciones... |
| Tipo: Report |
Palavras-chave: Natural populations; Fishery resources; Exploitation; Resource management; Benthos; Benthos; Fishery resources; Resource management; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_6524. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1754 |
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| Luoma, S. |
| It has been established that direct uptake of (at least some) trace metals from sediments contributes to metal concentrations in benthic organisms. Important controls on metal uptake from sediment are the concentration of the exposure, the partitioning of the metals among components of the sediment, and the redox potential of the sediment. Important problems in ecology, physiology, geochemistry and biogeochemistry remain unresolved, however, and a concentrated interdisciplinary research effort will be necessary before a complete understanding of the fate and impact of sediment-bound metals will be possible. |
| Tipo: Text |
Palavras-chave: Bioaccumulation; Benthos; Food webs; Biogeochemical cycle; Sediments; Availability; Trace metals. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/acte-1302.pdf |
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| Zilli,Florencia; Barco,Julia del; Vanzetti,Agustín. |
| ABSTRACT Currently, it is widely recognized that invertebrates play key roles in neotropical floodplains and in many other environments worldwide. However, little information has been published concerning their biometry, in spite that it represents an essential tool for many different studies. Here, we provided length-mass and length-length relationships by fitting the linearized model (log10 Y = log10a + b log10 X) and several mean biomass ratios ± SE for bivalves, gastropods, quironomids, ephemeropterans, oligochaetes and hirudineans. We measured, weighed, oven dried and incinerated to ashes specimens collected from 2005 to 2014 in the Paraná River, Argentina. The lineal equations had fit levels higher than 75% in most of the significant regressions.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometry; Organic matter; Paraná River; Wetlands; Benthos; Pleuston. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100214 |
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| Fernández, M.. |
| This is a study on surficial sediments and bottom water physico-chemical characteristics of the San Jorge Gulf (SW Atlantic, Argentina)during spring 1999 - winter 2000 (first studied period), autumn 2001- summer 2002 (second studied period)and winter 2003 (third studied period), based on samples obtained during research cruises carried out on board of the INIDEP (Instituto Nacional de Investigación y Desarrollo Pesquero)research vessels. Environmental variables such as temperature, salinity, density, oxygen and bottom water chlorophyll a content as well as granulometric fractions, total organic matter, total organic carbon, total nitrogen, total phosphorous, chlorophyll a and phaeopigments in sediment concentration and depth were analyzed. The origen and... |
| Tipo: Theses and Dissertations |
Palavras-chave: Physicochemical properties; Benthic environment; Organic matter; Shrimp fisheries; Benthos; Organic matter; Benthos; Physicochemical properties; Benthic environment. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/3134 |
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| Hosie, Graham; Koubbi, Philippe; Riddle, Martin; Ozouf-costaz, Catherine; Moteki, Masato; Fukuchi, Mitsuo; Ameziane, Nadia; Ishimaru, Takashi; Goffart, Anne. |
| The Census for Antarctic Marine Life (CAML, IPY Project 53) aimed to investigate the distribution and abundance of Antarctic marine biodiversity and how it will be affected by climate change. It was a major ship-based research programme in the austral summer of 2007-2008 involving scientists from 30 countries and 19 vessels. The Collaborative East Antarctic Marine Census (CEAMARC) was a multinational contribution to CAML involving scientists and students from several nations using three ships from Australia, Japan and France surveying the one area. This collaboration was a highly coordinated and comprehensive survey of the plankton, fish, benthos, oceanography and geophysical conditions of the waters north of Terre Adelie and George V Land of Eastern... |
| Tipo: Text |
Palavras-chave: CEAMARC; CAML; Marine biodiversity; Pelagic; Benthos. |
| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00227/33827/32466.pdf |
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| Salenpicard, C; Bellan, G; Bellansantini, D; Arlhac, D; Marquet, R. |
| Changes over a period of thirty years in a circalittoral mud community (% silt greater than or equal to 75) in the Gulf of Fos (French, Mediterranean coast) have been followed at three sites spaced along a transect NNW-SSE at depths of 15, 35 and 70 m. The results clearly show how the macrobenthic community at the three sites has been influenced by the construction of the port of Fos, notably as a consequence of sediment suspension during the dredging of the docks and the access channel, but also due to the dumping at sea of dredged material (more than 100 x 10(6) m(3) were dredged, about a quarter of which was dumped at sea, at depths of 30 to 60 m). The grouping of the samples taken before, during and after the development of the port (1963-1964, from... |
| Tipo: Text |
Palavras-chave: Long-term changes; Benthos; Synecology; Parsimonious analysis. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20400/18067.pdf |
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| Dadon, J.R.. |
| After a massive mortality of the dominant species (the clam Mesodesma mactroides) occurred in 1995, changes in the intertidal community in sandy beaches of Argentina were monitored. Eight sampling stations were established in a 40 km open stretch and samples were taken every October each year up to 2001. Biomass, density, size frequency distribution and mean growth rates for the most abundant species were analyzed. During the mortality event, only the benthic stages of M. mactroides were affected, their total mean biomass diminishing from 1,399 g to 2 g per running meter beach. Post-mortality recruitment was normal and the growth rates for the youngest cohorts were similar to those previously reported. After a two years’ lag, the wedge clam Donax... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Surf clams; Mesodesma mactroides; Donax hanleyanus; Sandy beaches; Benthos; Argentina; Species interactions; 42.73. |
| Ano: 2005 |
URL: http://www.repository.naturalis.nl/record/214338 |
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| Carpentier, Andre; Coppin, Franck; Dauvin, Jean-claude; Desroy, Nicolas; Dewarumez, Jean-marie; Eastwood, Paul D.; Ernande, Bruno; Harrop, Stuart; Kemp, Zarine; Koubbi, Philippe; Williams, Nigel Leader; Lefebvre, Alain; Lemoine, Michel; Loots, Christophe; S. Martin, Corinne; Meaden, Geoff J.; Ryan, Nick; Tan, Lei; Vaz, Sandrine; Walkey, Mike. |
| INTRODUCTION: The Dover Strait (Figure 1) connects the North Sea to the English Channel. Here, northern France and South-East England are at their closest. This narrow corridor, one of the world's busiest straits for maritime shipping, is a key economic area for numerous activities, such as leisure and tourism, international ports and shipping, plus the exploitation of living or abiotic marine resources. This area is a significant resource for fisheries because many commercial fish species are abundant there, but also because of the presence of nursery and spawning areas and migratory routes linked to specific environmental characteristics. The vulnerability of these resources, which are subjected to strong anthropogenic pressures, has brought together... |
| Tipo: Text |
Palavras-chave: Survey; Landings; Larvae; Eastern channel; Benthos; Fish; Sig; Policy analysis; Species protection; Habita protection; Protected areas; Marine biodiversity conservation. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/rapport-2350.pdf |
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| Registros recuperados: 196 | |
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