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| Registros recuperados: 242 | |
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| Condie, Scott A.; Hayes, Donna; Fulton, Elizabeth A.; Savina, Marie. |
| The Clarence River Estuary is the largest estuary in southeast Australia, with an extensive floodplain encompassing multiple river channels and a large coastal lagoon. It is the focus of major commercial and recreational fisheries and there is pressure to divert its freshwater inputs for agricultural and domestic uses. We used a spatial biogeochemical model to simulate the variability and evolution of this system on timescales from days to decades over the past half century. Like most tropical and subtropical estuaries, the Clarence River Estuary is strongly influenced by river discharge, sediment and nutrient loads. Given the high nutrient loads arriving from the upper catchment, plankton biomasses in the model were typically limited by flushing through... |
| Tipo: Text |
Palavras-chave: Coastal lagoon; Flushing; Land-use; Climate impacts; Nutrients; Phytoplankton; Zooplankton. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00175/28673/27113.pdf |
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| Saraux, Claire; Van Beveren, Elisabeth; Brosset, Pablo; Queiros, Quentin; Bourdeix, Jean-herve; Dutto, Gilbert; Gasset, Eric; Jac, Cyrielle; Bonhommeau, Sylvain; Fromentin, Jean-marc. |
| Around 2008, an ecosystem shift occurred in the Gulf of Lions, highlighted by considerable changes in biomass and fish mean weight of its two main small pelagic fish stocks (European anchovy, Engraulis encrasicolus; European sardine, Sardina pilchardus). Surprisingly these changes did not appear to be mediated by a decrease in fish recruitment rates (which remained high) or by a high fishing pressure (exploitation rates being extremely low). Here, we review the current knowledge on the population's dynamics and its potential causes. We used an integrative ecosystem approach exploring alternative hypotheses, ranging from bottom-up to top-down control, not forgetting epizootic diseases. First, the study of multiple population characteristics highlighted a... |
| Tipo: Text |
Palavras-chave: Population dynamics; Top-down; Disease; Zooplankton; Exploited species; Bottom-up. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00427/53861/54903.pdf |
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| Piontkovski, Sa; Landry, Mr; Finenko, Zz; Kovalev, Av; Williams, R; Gallienne, Cp; Mishonov, Av; Skryabin, Va; Tokarev, Yn; Nikolsy, Vn. |
| Data collected during cruises of the Former Soviet Union (in 1963-1989) and the British Atlantic meridional transect program (in 1995-1999) were used to analyse macroscale patterns in phyto- and zooplankton biomass, size structure, species diversity, chlorophyll a, and plankton bioluminescence in the macroscale anticyclonic gyre of the South Atlantic Ocean. The spatial pattern of bioluminescence intensity was in good agreement with that of remotely sensed (CZCS) chlorophyll a, phosphate, salinity, and copepod species diversity index distributions especially in terms of geographic inclinations of the isolines, both associated with the north-westward pattern off the South equatorial current. Among the 416 copepod species recorded in samples, 51 species were... |
| Tipo: Text |
Palavras-chave: Zooplancton; Chlorophylle; Bioluminescence; Altantique Sud; Zooplankton; Chlorophyll; Bioluminescence; South Atlantic Ocean. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00322/43271/43002.pdf |
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| Quintin, Jean-yves; Castaing, Patrice; Jouanneau, Jean-marie; Oggian, Georges; Chaurial, Bernard; Gournier, Nathalie; Sautour, Benoît; Parra, René; Bachelet, Guy; Leconte, Michel. |
| Monitoring n° 29 of the BLAYAIS nuclear power plant takes into account studies conducted between April and November 2006. Physicochemistry, Bathymetry, Hydrobiology, Bacteriology, Zooplankton, Benthic macrofauna, are reported. [see summary p. 7 - 10 (in French)] |
| Tipo: Text |
Palavras-chave: Benthic macrofauna; Zooplankton; Microbiology; Hydrology; Bathymetry; Physico chemistry; Pelagos; Monitoring; Gironde estuary; Nuclear power plant; Macrofaune benthique; Zooplancton; Microbiologie; Hydrologie; Bathymétrie; Physico chimie; Pelagos; Surveillance; Estuaire de la Gironde; Centrale nucléaire. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/rapport-2572.pdf |
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| Plounevez, Serge; Champalbert, Gisèle. |
| Feeding behaviour of adult European anchovy (Engraulis encrasicolus) was studied in the Gulf of Lions (northwestern Mediterranean Sea) in relation to major abiotic and biotic factors. Observations were made during the main spawning period (summer) for two years, data were collected through hydrological pro-tiling, zooplankton hauls and fish trawling performed in areas of high anchovy density. Temperature, salinity and zooplankton biomass were stratified in the study areas, with cladocerans numerous above the thermocline whereas copepods were dominant below. Engraulis encrasicolus was strictly zooplanctivorous during the main spawning season with copepod and crustacean larvae dominating in stomach contents. Anchovy exhibited high trophic activity during the... |
| Tipo: Text |
Palavras-chave: Anchois; Alimentation; Zooplancton; Reproduction; Méditerranée; Anchovy; Feeding; Zooplankton; Spawning; Mediterranean Sea. |
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/00301/41263/40455.pdf |
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| Peijnenburg, K.T.C.A.; Goetze, E.. |
| Open ocean zooplankton often have been viewed as slowly evolving species that have limited capacity to respond adaptively to changing ocean conditions. Hence, attention has focused on the ecological responses of zooplankton to current global change, including range shifts and changing phenology. Here, we argue that zooplankton also are well poised for evolutionary responses to global change. We present theoretical arguments that suggest plankton species may respond rapidly to selection on mildly beneficial mutations due to exceptionally large population size, and consider the circumstantial evidence that supports our inference that selection may be particularly important for these species. We also review all primary population genetic studies of open ocean... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Adaptation; Climate change; Marine; Oceanic; Selection; Zooplankton; 42.72; 42.94. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/470572 |
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| Castañeda, P.. |
| Durante la VII Expedición Ecuatoriana a la Antártida, en el verano austral 1998, los días comprendidos entre el 24 al 27 de enero de 1998, se realizaron 14 arrastres planctónicos oblicuos en el Estrecho Bransfield. Las colectas fueron realizadas con una red bongo de 0.6 m de diámetro y 600μ de abertura de malla, efectuados a partir de los 600 metros de profundidad. De 1228 especímenes estimados, a 198 de estos se determinó la especie, sexo y longitud estándar. Se identificaron 2 géneros y 3 especies: Thysanoessa sp., (665 ind/1000 m3), T. macrura (296 ind/1000 m3) y Euphausia superba (267 ind/1000 m3). Se destaca la predominancia numérica de Thysanoessa sp., sobre E. superba. En el ámbito general los individuos adultos dominaron la mayoría de las capturas,... |
| Tipo: Journal Contribution |
Palavras-chave: Distribution records; Abundance; Population structure; Zooplankton; Polar waters; Population structure; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_15490. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/3843 |
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| Idrisi, N.; Romanou, A.; Olascoaga, M.J.. |
| A Nutrients-Phytoplankton-Zooplankton-Detritus (NPZD) ecosystem model is coupled to the Miami Isopycnic-Coordinate Ocean Model (MICOM) to study planktondynamics in the Arabian Sea. Experiments oriented to testing the NPZD-MICOM coupled model sensitivity to variations in several parameters are performed. Particular attention is paid to the rates of detritus sinking and maximum phytoplankton growth rate. The coarse features of the blooms are captured by all the experiments considered, and agree with earlier models for the biological activity of the region. Intensity, duration, and peaks of the blooms are found to be quite sensitive to the parameter choices. The existence of an offshore deep chlorophyll maximum in the model is found to be closely related to... |
| Tipo: Journal Contribution |
Palavras-chave: Phytoplankton; Zooplankton; Detritus; Biophysics; Modelling; Arabian Sea; Http://aims.fao.org/aos/agrovoc/c_565. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/271 |
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| Prado, M.; Cajas, J.. |
| Se realizó el análisis de plancton en tres estaciones fijas ubicadas en el perfil de la costa ecuatoriana: Esmeraldas, Punta Galera y Puerto López entre abril y diciembre de 2008. Las muestras fueron obtenidas mensualmente, identificándose un total de 99 especies fitoplanctónicas y 122 zooplanctónicas. El análisis cualitativo y cuantitativo de la variación mensual del plancton fue comparado entre los años 2006, 2007 y 2008, determinándose que el año 2008 fue el de mayor productividad y que Esmeraldas registró la mayor productividad fitoplanctónica y la menor densidad zooplanctónica; tendencia contraria a Punta Galera y Puerto López, estaciones donde se registraron densidades fitoplanctónicas menores y altas concentraciones de zooplancton debido a la... |
| Tipo: Journal Contribution |
Palavras-chave: Fixed stations; Oceanographic data; Phytoplankton; Zooplankton; Plankton surveys. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/4787 |
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| Medellín-Mora, J.; Navas-S., G.R.. |
| En el Caribe colombiano existen pocos trabajos sobre zooplancton que han estudiado su composición específica y la información existente está en gran parte consignada en literatura gris y muy dispersa. Estudios realizados en otras áreas del Caribe muestran una alta riqueza de copépodos registrando aproximadamente 500 especies. En este trabajo se presenta el listado taxonómico de 217 especies de copépodos planctónicos pertenecientes a los órdenes Calanoida, Cyclopoida, Harpacticoida, Poecillostomatoida, Mormonilloida y Siphonostomatoida, registradas para el mar Caribe colombiano desde 1970. |
| Tipo: Journal Contribution |
Palavras-chave: Zooplankton; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_15490. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4019 |
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| Sabatini, M.. |
| The abundance, distribution and structure of the zooplankton community in southern Patagonia (SW Atlantic Ocean) were studied during late summer (March-April 2000) from samples obtained with Nackthai (390 ~km) and Multinet (150 ~km) samplers. Total concentrations of zooplankton biomass, integrated in the water column, ranged between 1.0 and 14.5 g m-2 (dry weight) and reached the highest values in the mid and outer shelf off Bahía Grande (Santa Cruz Prov., Argentina) (51~'S). The < 5 mm size fraction, composed mainly of copepods represented, on average, 45% of the total; amphipods and euphausiids accounted for 20% and 31%, respectively. Amphipods were, almost exclusively, Themisto gaudichaudii and euphausiids most abundant species Euphausia lucens and... |
| Tipo: Journal Contribution |
Palavras-chave: Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Zooplankton; Biomass; Population structure; Geographical distribution; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32413. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/3142 |
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| Registros recuperados: 242 | |
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