Consulta: subjectFacets:"Trophic relationships"
Registros recuperados: 37
Data/hora: 17/06/2024 01:19:44

Trophic relationships between benthic or planktonic microphytes and infaunal bivalve molluscs
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plantecuny, M; Bodoy, Alain.
In order to estimate energetic relationship, microphytic and benthic bivalve levels of a shallow (1.5 m), sandy ecosystem near Marseille (Gulf of Fos, Southern France) were sampled monthly during 1.5 year, in two sites differing by their wave exposure. In the sheltered area, the bivalve Ruditapes decussatus was the dominant species, while another bivalve, Donax trunculus , was found in the open, wave exposed site. Chlorophyll a and primary production of the phytoplankton and the microphytobenthos, as well as population dynamic, growth and biochemical composition of bivalves (lipids, proteins and carbohydrates) were monitored.
Tipo: Text
Palavras-chave: Ruditapes decussatus; Bivalvia; Periphyton; Phytoplankton; Biochemical composition; Growth; Marine molluscs; Hydrodynamics; Seasonal variations; Primary production; Trophic relationships.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1528.pdf

Identification of the main processes underlying ecosystem functioning in the Eastern English Channel, with a focus on flatfish species, as revealed through the application of the Atlantis end-to-end model
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Girardin, Raphael; Fulton, Elizabeth A.; Lehuta, Sigrid; Rolland, Marie; Thebaud, Olivier; Travers-trolet, Morgane; Vermard, Youen; Marchal, Paul.
The ecosystem model Atlantis was used to investigate the key dynamics and processes that structure the Eastern English Channel ecosystem, with a particular focus on two commercial flatfish species, sole (Solea solea) and plaice (Pleuronectes platessa). This complex model was parameterized with data collected from diverse sources (a literature review, survey data, as well as landings and stock assessment information) and tuned so both simulated biomass and catch fit 2002–2011 observations. Here, the outputs are mainly presented for the two focus species and for some other vertebrates found to be important in the trophic network. The calibration process revealed the importance of coastal areas in the Eastern English Channel and of nutrient inputs from...
Tipo: Text
Palavras-chave: Ecosystem modelling; Flatfish fisheries; Trophic relationships; Calibration; Atlantis; Eastern English Channel.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00354/46524/46289.pdf

Trophic resource partitioning of two snook fish species (Centropomidae) in tropical estuaries in Brazil as evidenced by stable isotope analysis
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guazzelli Gonzalez, Julio; Ménard, Frédéric; Le Loc'H, François; Agrelli De Andrade, Humber; Pontes Viana, Andréa; Ferreira, Valdimere; Frédou, Flávia Lucena; Lira, Alex Souza; Munaron, Jean-marie; Frédou, Thierry.
We investigated the trophic niches and the resource partitioning of two snook species, the common (Centropomus undecimalis) and the fat snook (C. parallelus), in four tropical estuaries of the northeastern Brazil, using stable isotope analyses of carbon (δ13C) and nitrogen (δ15N). Fish specimens, mainly juveniles, basal resources and a primary consumer were collected in 2015 during dry and rainy seasons in all estuaries, which exhibited differences in system size, geomorphologic shapes, levels of sea access and anthropic pressures. Potential effect of factors like fish body length, estuary and seasonality on isotope ratios were investigated. Positive relationships between the size of fish and δ15N values were found, regardless the species. Our results...
Tipo: Text
Palavras-chave: Brackish water fish; Trophic relationships; Carbon; Nitrogen; Centropomus.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61767/65745.pdf

Spatial and temporal variations in food web structure from newly-opened habitat at hydrothermal vents
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gaudron, Sylvie Marylene; Lefebvre, Sebastien; Jorge, Amandine Nunes; Gaill, Francoise; Pradillon, Florence.
To highlight the spatio-temporal variability of the food web structure of hydrothermal vent fauna from newly-opened habitat, a series of Titanium Ring for Alvinellid Colonization devices (TRACs) was deployed at TICA site on the East Pacific Rise in 2006. This experiment was conducted for periods of 4 days, 13 days and one month and deployments were aligned along a gradient from the basaltic bottom to the vent openings. delta C-13 values of colonists revealed a narrower range of carbon sources in proximity to vent openings in Alvinella pompejana habitat than in Tevnia jerichonana habitat, separated by a distance of four meters. This was possibly due to a spatial change in available food sources with a possible higher contribution of particulate organic...
Tipo: Text
Palavras-chave: Trophic relationships; Food web structure; Hydrothermal vent; East Pacific Rise; Stable isotopes; Colonization experiment; TRACs; Alvinella pompejana; Epibiosis.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00085/19580/19581.pdf

Role des bacteries phototrophes anoxygeniques dans une partie stratifiee d'une lagune tropicale (Lagune Ebrie, Cote d'Ivoire)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Caumette, P.
In the deepest parts of the estuarine region of Ebrie Lagoon (Abidjan Africa, (5 degree N, 4 degree W) stratified conditions have been observed during the rainy season (May to Nov.), owing to salinity differences between oxic and anoxic layers. At the interface, 3-4 m depth, phototrophic bacteria (Chromatium, Chlorobium and Pelodictyon ) developed, forming a brown layer due to their different pigments. Their production has been estimated at 41% of the total photosynthetic production during high stratification (Sep. 1981) and their biomass was used by the copepod population for 40 to 60% of its diet. During the dry season, the water column became homogeneous and oxygen was detected to 6m depth. The brown layer of phototrophic bacteria disappeared, as well...
Tipo: Text
Palavras-chave: Chlorobium; Chromatium; Primary production; Photosynthesis; Estuaries; Seasonal variations; Plankton; Stratification; Vertical distribution; Bacteria; Coastal lagoons; Trophic relationships; Biomass.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-957.pdf

Etude des liens trophiques au sein d'une communaute bacterienne selectionnee a partir d'un sediment marin sur le cyclohexene-4 dicarboximide-1,2 (THPI)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Terrom, G; Gil, G; Lepetit, J.
A bacterial community has been selected from a marine sediment on 4-cyclohexene-1,2 dicarboximide or THPI (fungicide). This community consists of nine strains. The "principal" strain, Photobacterium mandapamensis , degrades THPI by different metabolic pathways many of which require co-oxidative sequences. The other eight "auxiliary" strains occur at different states along the trophic chain formed by the "principal" strain, so increasing velocity and intensity of the THPI biodegradation.
Tipo: Text
Palavras-chave: Bacteria; Marine pollution; Microorganisms; Metabolism; Fungicides; Biodegradation; Sediment pollution; Trophic relationships.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1021.pdf

Heterogeneous energetic pathways and carbon sources on deep eastern Mediterranean cold seep communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Carlier, Antoine; Ritt, Benedicte; Rodrigues, Clara F.; Sarrazin, Jozee; Olu, Karine; Grall, Jacques; Clavier, Jacques.
Cold seep communities in the Mediterranean Sea have only been discovered two decades ago, and their trophic ecology has been the subject of very few studies. We investigated the benthic food web of two deep chemosynthesis-based ecosystems on the Napoli and Amsterdam mud volcanoes (MVs) in the eastern Mediterranean Sea (similar to 2,000 m depth). Seeping methane has been detected at the surface of both MVs during pioneering cruises and has been hypothesised to be assimilated by benthic fauna as observed in other oceans' margins. Given the extreme oligotrophic character of the eastern Mediterranean Sea, we a priori expected that chemosynthetic food sources, especially methane-derived carbon (MDC), played a major trophic role in these deep seep communities...
Tipo: Text
Palavras-chave: Gulf of Mexico; Anaerobic methane oxidation; Stable isotope analysis; Sea hydrothermal vents; Food web structure; Kazan mud volcano; Florida escarpment; Trophic relationships; Benthic communauties; Lamellibrachia SP.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00016/12684/9633.pdf

Nutrition experimentale: Problemes methodologiques lies a l'utilisation des microorganismes comme source trophique
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Guidi, L.
The present study deals with technical problems encountered under lab conditions in studies of trophic relations between deposit-feeding invertebrates and microorganisms. Using 2 pure cultures of Pseudomonas and Navicula , it was shown that these microorganisms will attach to artificial (glass beads) and natural (sand grains) substrates. Best microbial attachment was observed on sand (up to 4.8 x 10 super(8) cells.g super(-1) dry wt.). The radioactive labelling of the microorganisms depends not only on the form under which the isotope ( super(14)C) is supplied to the cultures, but also on the time and the duration of the labelling. 70% of the isotope was incorporated in a stable manner by the diatoms. The bacteria incorporated, at most, 34% of the...
Tipo: Text
Palavras-chave: Navicula; Pseudomonas; Bacillariophyceae; Algae; Bacteria; Biological attachment; Radioactive tracers; Methodology; Microorganisms; Trophic relationships; Microbiological culture; Zoobenthos; Nutrition.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-987.pdf

Empirical modelling of the growth of Ruditapes philippinarum by means of non linear regression on factorial coordinates
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Goulletquer, Philippe; Bacher, Cedric.
In order to highlight the main factors accounting for the growth of clams in Marennes Oleron Bay, three locations were investigated in 1984-1985. First, factor analysis provided information on fluctuations of the environment. Second, principal components analysis was used to study ecological phenomena. The main axes explained the growth rate, which was included in an allometric model. Its properties were then studied by means of sensitivity analysis.
Tipo: Text
Palavras-chave: Sensitivity analysis; Non linear model; Principal components analysis; Ruditapes philippinarum; Trophic relationships; Analyse de sensibilité; Modèle non linéaire; Analyse en composantes principales; Ruditapes philippinarum; Relations trophiques.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-2879.pdf

Metazooplankton communities in the Ahe atoll lagoon (Tuamotu Archipelago, French Polynesia): Spatiotemporal variations and trophic relationships
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Pagano, Marc; Sagarra, Pascual-boi; Champalbert, Gisele; Bouvy, Marc; Dupuy, Christine; Thomas, Yoann; Charpy, Loic.
Metazooplankton abundance, biomass (&lt;80 mu m, 200-500 mu m and &gt;500 mu m) and community structure in the Ahe atoll were studied together with their relationships with environmental factors (temperature, salinity, wind) and trophic factors (phytoplankton, bacteria, heterotrophic nanoflagellates (HNF) and ciliates) during three periods in 2008-2009. Meroplankton, mainly bivalve and gastropod larvae, was dominant. Holoplankton was dominated by copepods, the main species being Oithona spp., Paracalanus parvus, Clausocalanus spp., Corycaeus spp., Acartia fossae and Undinula vulgaris. The results suggest a clear wind influence on the structure and horizontal distribution of the zooplankton communities. The metazooplankton appeared to be controlled mainly...
Tipo: Text
Palavras-chave: Metazooplankton; Spatio-temporal patterns; Trophic relationships; Pearl oyster; Atoll lagoon; French Polynesia.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00101/21207/19419.pdf

Relations entre la nourriture disponible et la reproduction de mollusques en milieu estuarien : variabilité temporelle de la colonne d'eau
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean; Razet, Daniel.
The study of the trophic relations needs to collect data which can best represent the variability of the populations of molluscan and the parameters of the water. For the water, the main parameters which play a role on the production of molluscan in an estuarine area are the temperature, the seston, and the phytoplanctonic biomass. For the temperature is proposed to sample only twice a month. At the contrary for seston variations which are very large on a tidal cycle and correlated with the currents and the waves, it is necessary to take in count this variability. For the phytoplancton, the annual cycle is well characterized, but the variability at a station is depending on the caracteristic of each water masses. The authors suggest that a sampling...
Tipo: Text
Palavras-chave: Estuarine ecosystem; Trophic relationships; Time variations; Sampling strategies; Ecosystème estuarien; Relations trophiques; Variabilité temporelle; Stratégie d'échantillonnage.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2868.pdf

Ecología trófica de la caballa del Mar Argentino (Scombridae, Scomber japonicus marplatensis). Parte I. Alimentación y crecimiento
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Angelescu, V.A.
The present study describes the morphology of the digestive system, the feeding and feeding behaviour, and the trophic relationships of the mackerel in the coastal waters regions, pelagic zone, along the Province of Buenol Aires. At the same time, this study is completed with a bioestatistical analysis on growth rhythm of body length and body weight of secondary juveniles, pre-adults and adults. All the biological information and statistical data correspond, only to the period november-march and the summer trophic habitat area.
Tipo: Journal Contribution
Palavras-chave: Trophic relationships; Ecological distribution; Digestive system; Feeding; Growth curves; Condition factor; Mackerel fisheries; Feeding; Digestive system; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2275.
Ano: 1979
URL: http://hdl.handle.net/1834/2058

Ecología trófica de la merluza común (Merluccius hubbsi) del Mar Argentino. Parte 3. Consumo anual de alimento a nivel poblacional y su relación con la explotación de las pesquerías multiespecíficas.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Prenski, L.B.; Angelescu, V.
The English contents gives a general view on the topics treated in this contribution developed mainly on the basis of a quantitative and ecological analysis of trophic relationships in the Argentinian Continental Shelf, in which common hake and its food species are involved (anchovy, mictophids, small fishes, squids and macrozooplankton crustaceans). The most original part consist in the application of bioenergetic and simulation models for estimating the annual food consumption by individuals and by stocks of common hake during 1970-1987, considering at the same time, the effects of commercial catches on the stockbiomasses in predator-prey relationships. From this point of view three trophic-fishery relationships are evident, namely: "Common...
Tipo: Journal Contribution
Palavras-chave: Trophic relationships; Food consumption; Mathematical models; Simulation; Biomass; Food consumption; Simulation; Biomass; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_5209; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 1993
URL: http://hdl.handle.net/1834/2557

Las rayas del género Psammobatis de la plataforma Argentina: biología y ecología
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mabragaña, E.
Las rayas (Rajidae)conforman un grupo de peces cartilaginosos de hábitos bentónicos, presentes en casi todos los mares del mundo. En la plataforma continental argentina (PCA)han sido reconocidas 23 especies de rayas pertenecientes a 7 géneros (Atlántico SO). El género Psammobatis Günther, objeto del presente estudio, es endémico de Sudamérica y está compuesto de 8 especies. Dentro de las rayas de la PCA es el que mayores problemas taxonómicos ha tenido debido a su morfología y diversidad. Las características de historia de vida hacen que este grupo sea muy vulnerable a la explotación pesquera. Hasta cerca de una década atrás, en nuestro país las rayas eran capturadas incidentalmente, siendo descartadas o destinadas a la harina de pescado, pero en los...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Taxonomy; Identification keys; Geographical distribution; Reproduction; Trophic relationships; Stomach content; Taxonomy; Geographical distribution; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2007
URL: http://hdl.handle.net/1834/3130

Algunos aspectos de la biología reproductiva y comportamiento trófico de la corvina rubia (Micropogonias furnieri) en relación al frente salino del estuario del Río de la Plata.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Bava, J.; Jaureguizar, A.; Meijide, F.
Tipo: Theses and Dissertations
Palavras-chave: Feeding behaviour; Reproduction; Brackishwater fish; Trophic relationships; Feeding behaviour; Reproduction; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1996
URL: http://hdl.handle.net/1834/4005

El zooplancton del hábitat reproductivo de la población bonaerense de anchoíta (Engraulis anchoita), con especial énfasis en crustáceos
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Viñas, M.D.; Marrari, M.; Di Mauro, R.; Cepeda, G.D.; Padovani, L.N.
The information gathered in Argentine anchovy (Engraulis anchoita) Northern population assessment cruises allowed to perform studies on the zooplankton community of the Buenos Aires shelf since 1995. In this work the most relevant results as regards the taxonomy and size structure of the community, faunistic areas, and 'key' species in relation to the hydrographic conditions and frontal systems of the region are presented. Besides, the consequences those results might have on Argentine anchovy trophic ecology are analyzed. The taxonomic groups studied included copepods, cladocerans, appendicularians, chaetognaths, amphipods, and euphausiids. The multivariate analysis applied to quantitative data allowed to clearly distinguish three faunistic areas with...
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Biogeography; Fauna; Fronts; Trophic relationships; Abundance; Pelagic fisheries.
Ano: 2013
URL: http://hdl.handle.net/1834/5497

Distribución del plancton a mesoescala en un área de reproducción de la anchoíta en la plataforma bonaerense
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Akselman, R.; Carreto, J.I.; Ramirez, F.C.
In order to determine the distribution patterns of phytoplanktonic and zooplanktonic species that constitute the main food of the argentine anchovy (Engraulis anchoita), a study was made within a coastal spawning area on meso-scaled space (approximately 7 miles between stations). It was observed the predominacne of the copepod Oithona helgolandica and copepodites stages of other small-sized species, thus inferring the preponderance of nauplii stages which constitute the main food of early anchovy larvae. A high spatial heterogeneity was found in the distrtibution of both phytoplanktonic and zooplanktonic communities. Phytoplankton showed a patchiness distribution both in horizontal and vertical directions. Diatoms, dinoflagellates and coccolithophoirids...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Zooplankton; Trophic relationships; Population density; Horizontal distribution; Species diversity; Phytoplankton; Zooplankton; Species diversity; Population density; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1986
URL: http://hdl.handle.net/1834/2034

Estudios ecológicos en el Golfo San Jorge y adyacencias (Atlántico sudoccidental). Distribución, abundancia y variación estacional del fitoplancton en relación a factores físico-químicos y la dinámica hidrológica.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Akselman, R.
This study was based on four seasonal cruises during 1984 and 1985.  It revealed a thermo-haline frontal system formed by the advection of the Coastal Water mass flowing in two branches, one running towards the coast and the other mid-shelf directed. The thermocline developed between late spring and autumn results in a low inorganic nutrient concentration in the upper layer. Nonetheless in winter, a vertical homogeneity and high nutrient concentration were observed.  Phytoplankton development presented a typical temperate-seas annual cycle. In winter, reduced populations were dominated by diatoms. The highest biomass concentration in the cycle coincided with the spring blooming, to which Thalassio sira anguste-lineata,Alexandrium tamarense, Heterocapsa...
Tipo: Theses and Dissertations
Palavras-chave: Phytoplankton; Abundance; Trophic relationships; Cysts; Seasonal variations; Seasonal thermocline; Plankton surveys; Environmental effects; Phytoplankton; Cysts; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_34811.
Ano: 1996
URL: http://hdl.handle.net/1834/1464

Redes tróficas y flujos de energía en comunidades de pozas de marea de Mar del Plata
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Fueyo Sanchez, L.
El estudio de la estructura de las redes tróficas reviste gran importancia en la comprensión de los ecosistemas por las relaciones que hay entre dicha estructura y las funciones ecosistémicas. Además ofrece una visión global de la distribución de las diferentes especies, sus interacciones y los flujos de energía que entre ellas se producen. Varios autores han observado que las redes tróficas presentan regularidades en su estructura (Briand y Cohen 1987, Cohen y Newman 1988, Pimm et al. 1991, Chen y Cohen 2001, Montoya y Solé 2003). Sin embargo, el cuerpo teórico existente hace hincapié en la descripción de la estructura de las redes y presta menos atención a su funcionamiento y a los flujos de materia y energía implicados, aunque algunos autores han hecho...
Tipo: Theses and Dissertations
Palavras-chave: Trophic relationships; Intertidal environment; Metabolism; Food webs; Intertidal environment; Metabolism; Food webs; Http://aims.fao.org/aos/agrovoc/c_3923; Http://aims.fao.org/aos/agrovoc/c_4769; Http://aims.fao.org/aos/agrovoc/c_10973.
Ano: 2008
URL: http://hdl.handle.net/1834/3879

Ecología trófica de estadios juveniles de los esciénidos dominantes en el estuario de Bahía Blanca. Pescadilla de red (Cynoscion guatucupa) y corvina rubia (Micropogonias furnieri)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Sardiña, P.
Striped weakfish (Cynoscion guatucupa)and whitemouth croaker(Micropogonias furnieri)are one of the most important coastal resources of Bahia Blanca Estuary (Buenos Aires Prov., Argentina). The aims of this thesis were: 1, to analyze the population and morphological characteristics of the juveniles stages of the striped weakfish and the whitemouth croaker living in Bahia Blanca Estuary; 2, to describe the dietary habits of the juveniles of these two species; 3, to analyze the ontogenetic and seasonal diet changes in both species, and 4, to study the feeding interrelationships between both species as well as the interrelationships between each species and its prey. In view of the mentioned objectives, diet was evaluated taking into account the following...
Tipo: Theses and Dissertations
Palavras-chave: Brackishwater environment; Brackishwater fish; Comparative studies; Feeding behaviour; Trophic relationships; Zooplankton; Juveniles; Feeding behaviour; Zooplankton; Brackishwater environment; Juveniles; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_1050; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2004
URL: http://hdl.handle.net/1834/2595

Alimentación de Squalus acanthias y predación sobre Merluccius hubbsi en el Mar Argentino entre 34°47'-47°S.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Garcia de la Rosa, S.B.; Sánchez, M.F.
The spiny dogfish, Squalus acanthias is an euribatic, euritermic and cosmopolitan specie. In the Argentine Sea it consumes diversity of preys, characteristic of a generalist and oportunist feeder, butits principal food items are ctenophores, fishes and cephalopods.Diet overlap between sexes was found between 34°-37°S and 101-150 m,where males principally feed on fishes, squid and polichaetes,sharing only ctenophores and hake consumption with the females. Near 62 cm TL there is a shift in the diet, due to an increment of argentine hake Merluccius hubbsi and squid Illex argentinus predation and a diminution in ctenophores Pleurobrachia pileus eating. Feeding shows an increment from north to south, its mode on 42°-43°S.Argentine hake is an important prey...
Tipo: Journal Contribution
Palavras-chave: Feeding behaviour; Predation; Stomach content; Trophic relationships; Feeding behaviour; Predation; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_6162.
Ano: 1997
URL: http://hdl.handle.net/1834/1938

Estudios preliminares sobre las interrelaciones tróficas de 20 especies de peces del área costera bonaerense
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Pozzobon, M.V.
Realizada en el INIDEP (Instituto Nacional de Investigación y Desarrrollo Pesquero- Mar del Plata, Argentina).
Tipo: Theses and Dissertations
Palavras-chave: Ecology; Trophic relationships; Food webs; Diets; Stomach content; Ecology; Food webs; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_10973.
Ano: 1987
URL: http://hdl.handle.net/1834/3555

Aspectos biológico-pesqueros del abadejo (Genypterus blacodes)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Renzi, M.A.
The kingklip is one of the species that has been traditionally exploited in the Argentine Sea. Although captures were not very important, they have been increased in the last years. In this paper, the structure of the concentration areas of summer, spring and winter distribution and other biological aspects were analyzed, on the basis of the data collected during cruises carried out by R/V"Walther Herwig" and R/V"Shinkai Maru" in Argentine waters during 1978/79. The trophic spectrum of the kingklip comprises mainly food species of the Classes Pisces and Crustacea as well as other complementary groups like Mollusca, Brachiopoda and haliacea.
Tipo: Journal Contribution
Palavras-chave: Geographical distribution; Population structure; Size distribution; Feeding; Length-weight relationships; Food chains; Trophic relationships; Geographical distribution; Population structure; Feeding; Food chains; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_3014.
Ano: 1986
URL: http://hdl.handle.net/1834/2027

Estudio comparado de la alimentación entre algunos predadores de alto nivel trófico de la comunidad marina del norte y centro de patagonia
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Koen Alonso, M.
The comparative analysis of the food habits between top predator allows the evaluation of how these species use the trophic resources. They also make possible the study of potentially competitive relationships and the role of these predators in the regulation and structure of the community. The marine community of northern and central Patagonia is structured on the tri-trophic system composed by the Argentine anchovy (Engraulis anchoita), the Argentine shortfin squid (Illex argentinus), and Argentine hake (Merluccius hubbsi). Several marine mammals and elasmobranchs use these species as food resources. For this reason, the objective of this work was to analyze comparatively the diet of the South American sea lion (Otaria flavescens), the dusky dolphin...
Tipo: Theses and Dissertations
Palavras-chave: Feeding; Predators; Diets; Trophic relationships; Feeding; Predators; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_6163.
Ano: 1999
URL: http://hdl.handle.net/1834/2954

Estudio de las tramas tróficas asociadas a diferentes densidades de vieira Patagónica Zygochlamys patagonica del Atlántico SO mediante el uso de isótopos estables
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Schwartz, M.
Zygochlamys patagonica (King and Broderip, 1832) is an ecosystem engineer mollusk which forms aggregations or banks, of different densities, in the main frontal systems of the SW Atlantic Ocean. The objectives of this work were to analyze the composition, biomass, diversity and species richness of the benthic invertebrate assemblages at different scallop densities as well as the variability of their trophic webs at high and low scallop densities. For this, samples of the benthic invertebrate assemblages were taken at the Shelf Break Front with a non-selective epibenthic dredge. It was evaluated if the abundance (ind/m2) or biomass (colonial species, gr/m2) of the different taxa varied with scallop densities. The results showed that from 14 analyzed, the...
Tipo: Theses and Dissertations
Palavras-chave: Benthos; Ecological associations; Trophic relationships; Food webs; Biomass; Isotopes; Shelf fronts; Zygochlamys patagonica; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4521

Ecología del cangrejo violinista Uca uruguayensis: distribución, comportamiento reproductivo y su interacción con aves migratorias.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ribeiro, P.D.
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales (Argentina)
Tipo: Theses and Dissertations
Palavras-chave: Ecology; Density; Distribution; Reproductive behaviour; Interspecific relationships; Abundance; Trophic relationships; Predation; Environmental conditions; Distribution; Reproductive behaviour; Ecology; Predation; Density; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_37902; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_6162; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2004
URL: http://hdl.handle.net/1834/2960

Ración diaria y consumo de alimento de la población de Anchovia clupeoides (pisces: Engraulidae) en la Ciénaga Grande de Santa Marta, Caribe colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Duque, G.; Acero, P.A.
In tropical estuaries, most fishes feed at different hours during the day. To determine the daily ration and consumption of the Ciénaga Grande de Santa Marta (CGSM) population of Anchovia clupeoides monthly samplings of a 24 h cycle were taken at the coastal lagoon between October 1995 and June 1996. A total of 4389 specimens were examined. The population of A. clupeoides consumes almost twice its weight per year, representing a 0.53% of its body weight per day. Though the CGSM presents a high primary production (990 gC/m2 /year), the percentage that is transferred to the population of A. clupeoides is relatively low (0.055%). Hence, it seems that the high productivity of the CGSM is not being transferred to upper trophic levels due to the kind of...
Tipo: Journal Contribution
Palavras-chave: Estuaries; Trophic relationships; Estuaries; Http://aims.fao.org/aos/agrovoc/c_2673.
Ano: 2006
URL: http://hdl.handle.net/1834/1971

Tramas tróficas en sistemas frontales del Mar Argentino: estructura, dinámica y complejidad analizada mediante isótopos estables
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Gaitán, E.N.
Two of the most important frontal systems of the Argentine Sea (SW Atlantic Ocean) were compared to obtain evidences on the regulatory mechanisms of food web length, incorporating both spatial (areas within fronts) and temporal (presence or absence of frontal structure) variability. The stable isotopes of Carbon and Nitrogen were used to evaluate the origin and composition of the organic matter used by primary consumers, the structure of food webs, the trophic levels of several taxa and the benthic-pelagic coupling within each system. In the Río de la Plata estuarine front, different sources of organic matter would support the food webs occurring in the three areas of the system. The particulate organic material (POM) would be the main resource supporting...
Tipo: Theses and Dissertations
Palavras-chave: Food webs; Trophic relationships; Trophic levels; Saline fronts; Estuarine front; Carbon isotopes; Nitrogen isotopes; Plankton; Benthos; Brackishwater fish; Marine fish; Brackishwater environment; Marine environment.
Ano: 2012
URL: http://hdl.handle.net/1834/4523

Spatial and temporal characterization of soft bottom polychaetes in a shallow tropical bay (colombian Caribbean)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Guzmán-Alvis, A.I.; Lattig, P.; Ruíz, J.A.
The spatial and temporal variations of the polychaete assemblages were studied within and off a shallow (10-25 m) tropical bay (Bahía de Portete). The polychaete abundances at family level and their trophic mechanisms were used for this purpose. Sediment samples were collected at six stations in this bay during the wet and dry seasons. Multivariate analysis indicated that off- Bay polychaete assemblages were different from the bay ones; this spatial variation was related to sedimentary characteristics, depth and turbid-water conditions. On the other hand, these assemblages did not show significant differences between the dry and wet seasons. The differences between these two assemblages were given specially by the Syllidae, Gonidadidae, Nephtyidae,...
Tipo: Journal Contribution
Palavras-chave: Trophic relationships; Benthic environment; Organic matter; Temporal variations; Spatial variations; Organic matter; Benthic environment; Http://aims.fao.org/aos/agrovoc/c_5387; Http://aims.fao.org/aos/agrovoc/c_877.
Ano: 2006
URL: http://hdl.handle.net/1834/1979

Alimentación de la merluza (Merluccius hubbsi) en el Golfo San Jorge y aguas adyacentes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Sánchez, F.
The information obtained in summer research cruises carried out in 1995, 1999 and 2002 allowed to determine the trophic spectrum of common hake (Merluccius hubbsi) and to estimate anchovy (Engraulis anchoita) and hake consumption in the nursery area of the San Jorge Gulf and shelf adjacent waters (Argentine Sea, SW Atlantic). The area surveyed extended from 44ºS to 47ºS and between the 50-100 m isobaths. In the stomach content the most frequent items were crustaceans followed by fish. In all size groups sampled the presence of anchovy and common hake was observed. In the area assessed consumption of anchovy, weighted for the three summer months of 1995 was 56,639 t. The greatest predation pressure was observed on classes between 14-16 cm TL. Hake...
Tipo: Journal Contribution
Palavras-chave: Predation; Trophic relationships; Marine environment; Predation; Marine environment; Http://aims.fao.org/aos/agrovoc/c_6162; Http://aims.fao.org/aos/agrovoc/c_4610.
Ano: 2009
URL: http://hdl.handle.net/1834/3457

Ecología trófica de peces demersales en el Golfo San Jorge
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Sánchez, M.F.; Prenski, L.B.
This work is a first approach in the study of the trophic ecology from a multispecific fishery in San Jorge Gulf (45°-47°S), Argentina. Stomach contents from 28 demersal fish species were analyzed. Taxonomic and trophic spectrum were obtained. Using weight percentage of each prey, trophic spectrum variations for size classes were analized for each of the 12 considered "dominant" species. Overlaping in the diet among these predators was estimate using cluster analysis. There was an interespecific diet overlap between juveniles belonging to demersal-benthic fish species, because all of them prey upon Stomatopoda and Munida. Adults from those species and hake prefered young and adult hake as preys, while Macruronus magellanicus and juvelines Merluccius hubbsi...
Tipo: Journal Contribution
Palavras-chave: Marine fish; Trophic relationships; Feeding; Zooplankton; Feeding; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 1996
URL: http://hdl.handle.net/1834/1963

La fauna íctica en el litoral de la Bahía de San Antonio (Golfo San Matías, Provincia de Río Negro)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Perier, M.R.
La bahía de San Antonio es una zona costera protegida del litoral marítimo que presenta una variada composición faunística (invertebrados, peces, aves y mamíferos). Respecto de la fauna íctica, existe información preliminar que permitió detectar la presencia de especies que presentaban gónadas en estadío de maduración total y se observaron, estacionalmente, ejemplares juveniles de esas y otras especies que motivaron el planteo de las siguientes hipótesis: 1) La bahía San Antonio y la zona de mar adyacente es utilizada por numerosas especies de peces como zona de desove. 2) La bahía San Antonio y la zona de mar adyacente es utilizada por numerosas especies como área de cría y 3) La bahía San Antonio y la zona de mar adyacente es utilizada como zona de...
Tipo: Theses and Dissertations
Palavras-chave: Fishery biology; Fisheries resources; Coastal zone; Ichthyofauna; Spawning grounds; Nursery grounds; Feeding migrations; Environmental conditions; Population structure; Reproduction; Trophic relationships.
Ano: 1994
URL: http://hdl.handle.net/1834/4203

Contribución al estudio biológico-pesquero del pez gallo, Callorhynchus callorhynchus (Linné, 1758) Berg, 1895, en el Golfo San Matías
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Di Giácomo, E.E.
Tipo: Theses and Dissertations
Palavras-chave: Taxonomy; Stock assessment; Population structure; Reproduction; Trophic relationships; Taxonomy; Stock assessment; Population structure; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1990
URL: http://hdl.handle.net/1834/4067

The role of the Yala swamp lakes in conservation of Lake Victoria region haplochromine cichlids: evidence from molecular genetic and trophic ecology studies
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Abila, R.; Salzburger, W.; Ndonga, M.F.; Owiti, D.O.; Barluenga, M.
Lake Kanyaboli (Kenya), a satellite lake of Lake Victoria, has been suggested as a potential refugium for haplochromine cichlids that have gone extinct in Lake Victoria. We employed mitochondrial DNA and microsatellite DNA molecular markers as well as feeding ecology studies to re- evaluate the evolutionary and ecological significance of Lake Kanyaboli haplochromines. The mitochondrial DNA and microsatellite markers revealed high genetic diversity in the endangered Xystichromis phytophagus and also the presence of mtDNA haplotypes that may have either gone extinct in Lake Victoria or have arisen in situ. Lake Kanyaboli thus acts as a ‘genetic reservoir’ for the Lake Victoria species flock. Gut content analysis revealed six trophic groups among the six...
Tipo: Proceedings Paper
Palavras-chave: Tropical fish; Genetics; Swamps; Lakes; Resource conservation; Environment management; Rare resources; Resource management; Trophic relationships; Genetic diversity; Swamps; Inland waters; Water reservoirs; Freshwater lakes; Species extinction; Ecological efficiency; Genetics; Swamps; Lakes; Swamps; Inland waters; Water reservoirs; Species extinction; Resource conservation; Resource management; Http://aims.fao.org/aos/agrovoc/c_3222; Http://aims.fao.org/aos/agrovoc/c_7544; Http://aims.fao.org/aos/agrovoc/c_4160; Http://aims.fao.org/aos/agrovoc/c_7544; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_8324; Http://aims.fao.org/aos/agrovoc/c_17744; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006
URL: http://hdl.handle.net/1834/2130

Estudio del plancton en la zona de pesca de la merluza
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ferrando, H.J.
La finalidad del estudio está orientada hacia la confirmación, en base a las determinaciones de los distintos organismos planctónicos de la existencia de una zonación manifiesta en el área biooceanográfica correspondiente a los litorales marítimos de Argentina, Uruguay y sur de Brasil.
Tipo: Journal Contribution
Palavras-chave: Plankton; Trophic relationships; Plankton surveys; Plankton; Http://aims.fao.org/aos/agrovoc/c_5950.
Ano: 1958
URL: http://hdl.handle.net/1834/3024

Algunos aspectos de la biología reproductiva y comportamiento trófico de la corvina rubia (Micropogonias furnieri) en relación al frente salino del estuario del Río de la Plata.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Bava, J.; Jaureguizar, A.; Meijide, F.
Tipo: Theses and Dissertations
Palavras-chave: Feeding behaviour; Reproduction; Brackishwater fish; Trophic relationships; Feeding behaviour; Reproduction.
Ano: 1996
URL: http://hdl.handle.net/1834/4005

A seasonally varying biotope at Signy Island, Antarctic: implications for meiofaunal structure
Provedor de dados: Open Marine Archive
Autores: 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