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Registros recuperados: 60
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A comparative study on the feeding habits of Oreochromis niloticus (Linnaeus) in Nyanza Gulf Lake Victoria and sewage fish ponds OceanDocs
Getabu, A..
Gut content analysis of Oreochromis niloticus from the Nyanza Gulf, Lake Victoria showed that the bulk of the food items ingested constituted bottom deposits and blue green algae. Among the live food items ingested, blue green algae (Cyanophyceae) constituted 53.6%, the diatoms (Bacillariophyaceae) 19.7%, aquatic invertebrates (mainly Copepoda, Cladocera, and Rotifera) 12.9%, desmids (Desmidaceae) 7.7% and lastly the green algae (Chlorophyceae) 6.2%. The most preferred food items were: Spirulina laxisma and Nitzschia accicularis. The least preferred food items were: Lyngbya circumcreta, Microcystis aeruginosa and Pediastrum simplex. The quantity of food eaten by O. niloticus to satiation ranged from 0.016-4.5% body...
Tipo: Proceedings Paper Palavras-chave: Oreochromis niloticus; Feeding behaviour; Fish ponds; Food organisms; Sewage; Feeding behaviour; Fish ponds; Sewage; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_2929; Http://aims.fao.org/aos/agrovoc/c_7007.
Ano: 1994 URL: http://hdl.handle.net/1834/1160
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A remarkable sand-dwelling fish assemblage from central Amazonia, with comments on the evolution of psammophily in South American freshwater fishes Neotropical Ichthyology
Zuanon,Jansen; Bockmann,Flávio A.; Sazima,Ivan.
We studied a specialised assemblage of sand-dwelling fish species from a streamlet in central Amazonia. The five sanddwelling species comprised 15.2 % of the total number in the streamlet (33 species). Two of the sand-dwellers are daytime foragers, Characidium cf. pteroides (Crenuchidae) and Stauroglanis gouldingi (Trichomycteridae), whereas three ones are night-time foragers, Gymnorhamphichthys rondoni (Rhamphichthyidae), "Imparfinis" pristos and Mastiglanis asopos (Heptapteridae). With the exception of C. cf. pteroides, the remainder species bury in the sand during their resting period. All five species bear a cryptic, sand-colour pattern, and some are translucent, traits which we regard as advantageous both for evasion from predators and for approaching...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest streams; Fish diversity; Phylogeny; Feeding behaviour; Drift-trap net.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100012
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A simple way of avoiding feed wastage in European seabass, Dicentrarchus labrax, under self-feeding conditions ArchiMer
Coves, Denis; Gasset, Eric; Lemarie, Gilles; Dutto, Gilbert.
Self-feeding systems allow fish to freely express feeding activity. A simple rod at the water surface can act as a trigger and provide fish with a way of obtaining pellets from a feeder. Such a rod presented to experienced European seabass, Dicentrarchus labrax, may lead to feed wastage, probably as a result of unintentional fish contacts with the trigger. Trigger protection screens have been designed to prevent fish contacting the trigger by chance, and the efficacy of such screens was tested. Nocturnal and diurnal feed delivery and feed wasted were compared under conditions where the rod was unprotected or protected by semi-cylindrical or cylindrical screens. Tests were conducted using an unrestricted self-feeding regime (reward: 0.2 g pellet per kg of...
Tipo: Text Palavras-chave: Feeding behaviour; Feed wastage; Self feeding; Fish culture; Comportement alimentaire; Gaspillage d'aliment; Auto alimentation; Élevage de poissons.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-867.pdf
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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. OceanDocs
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
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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. OceanDocs
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
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Alimentación de Squalus acanthias y predación sobre Merluccius hubbsi en el Mar Argentino entre 34°47'-47°S. OceanDocs
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
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Alimentación del pez limón, Seriola lalandi (Valenciennes, 1833 in Cuvier y Valenciennes, 1833) en aguas bonaerenses OceanDocs
Vergani, M..
The yellowtail kingfish, Seriola lalandi, Carangidae (Valenciennes, in Cuvier y Valenciennes, 1833) is a pelagic, schooling fish, with gregarious behaviour. It is a circumglobal species from tropical and temperate waters. Adult S. lalandi migrate to Argentine waters (SW Atlantic) during summer months (January-April). They have been reported from Argentine waters in depths of 20-36 m between 36°S and 38° and, as reported elsewhere in the world, are often associated with rocky reefs. Samples of S. lalandi were caught using trolling lines during daytime around rocky reefs at 35° 52'-35° 58'S and 54° 45'-54° 48'W, on February 15-22, 2002. Sixty-six adult S. lalandi were analyzed, with specimens measured (LT) and weighted (WT). The length-weight relationship...
Tipo: Theses and Dissertations Palavras-chave: Feeding behaviour; Feeding migrations; Nursery grounds; Stomach content; Taxonomy; Length-weight relationships; Feeding behaviour; Taxonomy; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2005 URL: http://hdl.handle.net/1834/2561
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Aspectos biológicos y ecológicos de los pelecípodos protobranquios integrantes de las comunidades bentónicas del Golfo San Jorge: Nuculana sulculata (Couthouy, 1852), Nucula puelcha d'Orbigny, 1842 y Malletia cumingii (Hanley, 1860) OceanDocs
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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Aspectos de la conducta alimentaria del mero (Epinephelus morio) del Banco de Campeche OceanDocs
Giménez, E.; Anderes, B.; Moreno, V.; Burgos, R..
Results of stomach contents analysis of 855 red grouper specimens (Epinephelus morio) caught in Campeche Bank are presented. Individual length composition ranged from 25 to 89 cm fork length (Lf). Fishes (28%), crabs (43%), and shrimps (18%) integrated the main feeding groups in the stomach contents, with no preferential prey-feeding pattern observed. Crabs (33%) are the preferred prey for fish smaller than 55 cm Lf. From this size on fishes (42%) become the most represented items. A significant difference was found in the frequency distributions of preys by regions, with the central region showing the highest abundance. No significant differences in the prey frequency distributions by depth were observed. Feeding activity occurs all around the year, with...
Tipo: Journal Contribution Palavras-chave: Feeding behaviour; Feeding behaviour; Http://aims.fao.org/aos/agrovoc/c_10778.
Ano: 2001 URL: http://hdl.handle.net/1834/3679
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Aspectos de la conducta alimentaria del mero (Epinephelus morio) del Banco de Campeche OceanDocs
Giménez, E.; Anderes, B.; Moreno, V.J.; Burgos, R..
El trabajo expone los resultados del análisis de contenido estomacal de 855 individuos de mero (Epinephelus morio) capturados en el Banco de Campeche, con tallas entre 25 y 89 cm de longitud furcal (Lf). Los peces (28%), cangrejos (43%) y camarones (18%) predominan en el contenido gástrico. En tallas menores de 55 cm la frecuencia relativa de cangrejos es mayor (33%) y a partir de dicho tamaño los peces (42%) pasan a ser los más representados. Se detectó diferencia significativa en la distribución de frecuencias de las presas entre regiones, siendo la región central la de mayor abundancia. No se aprecian diferencias en la distribución de frecuencias de las presas por profundidad. La actividad alimentaria se manifiesta durante todo el año, con más...
Tipo: Journal Contribution Palavras-chave: Feeding behaviour; Food preferences; Stomach content; Feeding behaviour; Food preferences; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_3024.
Ano: 2001 URL: http://hdl.handle.net/1834/1807
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Aspectos etológicos y ecológicos de Camarones limpiadores de peces (Natantia: Palaemonidae, Hippolytidae, Stenopodidae) OceanDocs
Criales, M.M.; Corredor, L..
Por medio de buceos diurnos y nocturnos con equipo SCUBA, se hicieron observaciones de campo sobre la otología de los camarones limpiadores de peces presentes en la Bahía de Santa Marta (Colombia) y en Young Islatid Channel (Isla de Saint Vincent, Antillas Menores), desde enero hasta septiembre de 1976. Se tomaron notas detalladas del comportamiento de limpieza de dos especies de camarones de actividad diurna y de tres especies nocturnas, y de la frecuencia de las limpiezas de las especies particulares de peces. Los camarones diurnos mostraron preferencia por limpiar la. boca y las branquias de sus clientes y los camarones nocturnos por limpiar la superficie corporal de los mismos. Las poses adoptadas por los peces durante el día y la noche, sugieren un...
Tipo: Journal Contribution Palavras-chave: Marine crustaceans; Feeding behaviour; Shrimp fisheries; Feeding behaviour; Http://aims.fao.org/aos/agrovoc/c_10778.
Ano: 1977 URL: http://hdl.handle.net/1834/3903
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Aspects of the biology and feeding ecology of the orbiculate cardinal fish <i>Sphaeramia orbicularis</i> (Cuvier, 1828) (Teleostei: Apogonidae) in a Kenyan mangrove forest OMA
Mees, J.; Mwamsojo, G.U.; Wakwabi, E.O..
The orbiculate cardinal fish <i>Sphaeramia orbicularis</i> is the most abundant teleost among the root system of the extensive mangrove forests bordering Gazi Bay, Kenya. The species was never recorded from the bay proper and it can thus be considered to be a true mangrove resident. The sampled population clearly consisted of two cohorts: the modes were approximately 65mm and 80 mm. Most individuals with standard lengths >40mm had mature gonads ; the number of eggs ranged from 4,700 to 10,000. <i>S. orbicularis</i> are carnivores, mainly feeding on small epi- and hyperbenthic crustaceans. Numerically, gammaridean amphipods and tanaids were the dominant prey categories in the stomachs of both size classes. Individuals belonging to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding behaviour; Apogonidae [Cardinalfishes]; Sphaeramia orbicularis [orbiculate cardinalfish]; Teleostei; Kenya.
Ano: 1999 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4024
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Behavioural study of two Hydrothermal crustacean decapods: Mirocaris fortunata and Segonzacia mesatlantica, from the lucky strike vent field (mid-Atlantic ridge) ArchiMer
Matabos, Marjolaine; Cuvelier, D.; Brouard, J.; Shillito, B.; Ravaux, J.; Zbinden, M.; Barthelemy, D.; Sarradin, Pierre-marie; Sarrazin, Jozee.
Identifying the factors driving community dynamics in hydrothermal vent communities, and in particular biological interactions, is challenged by our ability to make direct observations and the difficulty to conduct experiments in those remote ecosystems. As a result, we have very limited knowledge on species’ behaviour and interactions in these communities and how they in turn influence community dynamics. Interactions such as competition or predation significantly affect community structure in vent communities, and video time-series have successfully been used to gain insights in biological interactions and species behaviour, including responses to short-term changes in temperature or feeding strategies. In this study, we combined in situ and ex situ...
Tipo: Text Palavras-chave: Abyss Box; Biological interactions; Deep-sea observatory; Eiffel Tower edifice; Feeding behaviour; Experimental research; Video imagery; Time series; Lucky Strike; Mid-Atlantic Ridge; 37 degrees 17 ' N; 32 degrees 16.3 ' W.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00266/37714/35732.pdf
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Biología, ecología y explotación de la raya platana Atlantoraja platana (Günther, 1880), (Chondrichthyes, Rajidae), del golfo San Matías OceanDocs
Coller, N.M..
La “raya platana” (Atlantoraja platana), es una especie endémica del Atlántico Sudoccidental, habita desde los 22º S (Uruguay y sur de Brasil) hasta los 42º S, región del Golfo San Matías (Argentina). El área de estudio del presente trabajo fue el Golfo San Matías (41º- 42º S y 64º- 65º O). El material analizado (778 hembras y 709 machos) fue colectado durante muestreos mensuales de las capturas desembarcadas por los barcos pesqueros de la flota local (muestreos de desembarque); muestras extraídas a bordo de las embarcaciones pesqueras por el programa de observadores a bordo, durante los años 2004 y 2005 y los meses de marzo, abril y mayo de 2006; y durante la realización de campañas de investigación pesquera (primavera de 2004, 2005 y 2006). Se describió...
Tipo: Theses and Dissertations Palavras-chave: Fishery biology; Ecology; Feeding behaviour; Age (biological); Growth; Coastal environment; Morphology (animal); Reproduction (biology); Spatial distribution; Population dynamics; Abundance.
Ano: 2012 URL: http://hdl.handle.net/1834/5235
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Biologie et peche du capitaine Lethrinus enigmaticus (Smith) 1959 du banc de Saya de Malha (Ocean Indien) ArchiMer
Lebeau, A; Cueff, J.-c..
I.S.T.P.M. lab of La Reunion (Indian Ocean) studies L. enigmaticus, its taxonomy, morphology, ecology, biology, feeding, reproduction and growth, and its fishing in the La Reunion and Mauritius Islands area.
Tipo: Text Palavras-chave: Lethrinus; Lethrinus nebulosus; Lethrinus borbonicus; Lethrinus caeruleus; Lethrinella xanthocheilus; Lethrinella variegatus; Lethrinus enigmaticus; Fishing; Fishing effort; Growth; Reproduction; Feeding behaviour; Feeding; Organism morphology; Taxonomy; Marine ecology.
Ano: 1975 URL: http://archimer.ifremer.fr/doc/1975/publication-2030.pdf
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Can turbot, Psetta maxima, be fed with self-feeders? ArchiMer
Burel, Christine; Robin, Jean; Boujard, Thierry.
The capability of turbots to use self-feeders was studied using 3 groups of 100 juveniles. Feeding activity reached a plateau after 20 days. Almost all feeding activity was observed during the photophase, and the acrophase was associated with dawn. The proportion of nocturnal demands was the highest in the replicate with the lowest feed efficiency, suggesting that feed waste was mainly occurring during nocturnal feeding activity. During the last 30 days of the experiment, demands were only rewarded during two periods of 2.5 h.day(-1). Feed efficiency was improved and was homogeneous between the three tanks, but the voluntary feed intake was reduced. It is concluded that turbots are able to use self-feeders but they do not adapt quickly, and they are not...
Tipo: Text Palavras-chave: Turbot; Self-feeders; Feeding behaviour; Feeding rhythms.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00335/44652/57339.pdf
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Capacidad de alimentación y análisis endoscópico en bivalvos filtradores de la infauna y epifauna de la Bahía de Yaldad, Chiloé, Chile. OceanDocs
González Ovando, L.P..
Mytilus chilensis, Venus antiqua, Mulinia edulis y Tagelus dombeii son moluscos bivalvos filtradores que habitan diferentes niveles de la planicie mareal de la bahía de Yaldad, Sur de Chile. El primero es un organismo de la epifauna mientras que las demás especies pertenecen a la infauna. Estas especies adoptan diferentes estrategias, como ser el desarrollo de sistemas de filtración y estructuras de selección de partículas, las que son usadas para aprovechar al máximo el alimento disponible en el medio. Con el fin de conocer y comparar la capacidad de alimentación en especies filtradoras de la infauna y epifauna se hicieron determinaciones fisiológicas (tasa de aclaramiento y tasa de ingestión), mediciones morfológicas de sus sistemas de filtración...
Tipo: Theses and Dissertations Palavras-chave: Marine molluscs; Feeding behaviour.
Ano: 2003 URL: http://hdl.handle.net/1834/4919
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Caractérisation de l’adaptation comportementale des téléostéens en élevage : plasticité et effets de la domestication ArchiMer
Benhaim, David.
The farming of aquatic animals has started recently in comparison with that of terrestrial species which domestication started 10 500 years ago. Aquaculture is however the fastest growing animal food-production sector. This sector has now to face several challenges threatening its sustainability. Indeed, aquaculture future largely depends upon the reduction of the reliance on feeds based ingredients derived from wild fishery resources, upon a better knowledge of fish domestication process and of the adaptation mechanisms and related welfare potential. The present work aims at a better understanding of the adaptation to farming conditions through a behavioural approach based on the comparison between wild vs. domesticated populations of three species: a...
Tipo: Text Palavras-chave: Adaptation; Plasticité; Domestication; Bien-être; Comportement alimentaire; Activité de nage; Personnalité; Aliment végétal; Labyrinthe; Statut physiologique; Croissance; Aquaculture; Repeuplement; Adaptation; Plasticity; Learning; Domestication; Welfare; Feeding behaviour; Swimming activity; Personality; Plant-based diet; Maze; Physiological status; Growth; Aquaculture; Restocking.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00078/18926/16515.pdf
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Características ambientales, reproducción y alimentación de la merluza (Merluccius hubbsi)y la anchoíta (Engraulis anchoita)en su habitatreproductivo patagónico. Síntesis y perspectivas OceanDocs
Sabatini, M..
Fish recruitment seems to be influenced by environmental variability;the plankton would act as a link between both processes. While environmental variability can be explained in terms of physical forcing, recruitment variability is partly determined by the survival of early larvae. In this review, the available information on hydrography and plankton in relation to reproduction and feeding of hake (Merluccius hubbsi)and anchovy (Engraulis anchoita)in the Patagonian Argentine Sea, SW Atlantic spawning ground was summarized and integrated. The objective was to assess what is actually known about the environmental and planktonic features of the region that may have an effect on the recruitment of both species. In the Patagonian spawning ground, detection, in...
Tipo: Journal Contribution Palavras-chave: Environmental conditions; Nursery grounds; Spawning grounds; Feeding behaviour; Shelf fronts; Feeding behaviour; Environmental conditions; Nursery grounds; Spawning grounds; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_25438; Http://aims.fao.org/aos/agrovoc/c_7277.
Ano: 2004 URL: http://hdl.handle.net/1834/1440
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Características de algunas rayas de la región sudpatagónica OceanDocs
Sánchez, M.F.; Mabragaña, E..
Data considered in this paper were obtained during a research cruise carried out on board of RV Dr. E.L. Holmberg from INIDEP (Instituto Nacional de Investigacion y Desarrollo Pesquero) during March-April 2000 in the area between 48°S and 55°S (S Patagonian) region, SW Atlantic. From 61 bottom trawls a total of 355 specimen belonging to 11 skate species were collected. This represents, in number, 1.8 of the total species biomass. All skate species were identified and some biological characteristics for each species analyzed. Abundance was estimated in tons and the distribution area of each species was determined. Total weight and morphometric data by sex were measured total length, disc width and clasper length. Stomach content and macroscopical...
Tipo: Journal Contribution Palavras-chave: Marine fish; Abundance; Stomach content; Food organisms; Diets; Feeding behaviour; Community composition; Feeding behaviour; Http://aims.fao.org/aos/agrovoc/c_10778.
Ano: 2002 URL: http://hdl.handle.net/1834/2426
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