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| Registros recuperados: 134 | |
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| Layman,Craig A.; Winemiller,Kirk O.. |
| Distribution and abundance of large fishes (SL>100 mm) in the río Cinaruco, a floodplain river in the Venezuelan llanos, were examined by gill net sampling in four habitat types: sand banks, backwater creeks, floodplain lagoons, and river channel. Sampling was standardized using nets (25 m x 2 m) of three mesh sizes set for 24-h periods. Based on data from >10,000 hours of gill netting over three years, there were significant differences in assemblage composition among the four habitats. Pair-wise comparisons suggested differences in assemblage composition between all pairs of habitats except creeks and lagoons. Differences in assemblage composition likely arose from species-specific habitat affinities. For example, 21 taxa were collected from both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Assemblage structure; Habitat affinity; Lagoon; Migration; Predation. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000100007 |
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| Sato, N. E.; Hernández, D.; Viñas, M. D.. |
| Se determinó por primera vez la dieta de las poblaciones de Sagitta friderici, un quetognato dominante en las aguas costeras de Argentina. Las muestras fueron recolectadas mensualmente en la Estación Permanente de Estudios Ambientales (38° 28´ S, 57° 41´W, 48 m profundidad) desde marzo de 2000 hasta abril de 2001. Los copepoditos de las especies Oithona nana, Oithona spp. y Calanoides carinatus y sus huevos fueron las presas dominantes. El porcentaje de quetognatos conteniendo alimento fluctuó entre 7 a 35 % con un valor medio de 21.71 ± 8.64 %. Este índice varió entre los diferentes meses, sin mostrar un claro patrón estacional. El número de presas ingeridas por quetognato fue más elevado en marzo y julio de 2000 que en los otros meses examinados; S.... |
| Tipo: Journal Contribution |
Palavras-chave: Predation. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4407 |
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| Garcia de la Rosa, S.B.. |
| As a general rule, sharks and rays play an important role in the energy exchanges among higher trophic levels of the marine food chain and some of them, with an important impact as piscivorous predators. Squalus acanthias (Squalidae) and Raja flavirostris (=Dipturus chilensis )(Rajidae), are two elasmobranchs with high apparition frequencies in the SW Atlantic, in the coastal and demersal fishing trawls, co-existing and predating on the principal stocks of bony fish there located, especially the Argentine hake (Merluccius hubbsi). Both species could be transformed into alternative fishing resources, even though they are not currently commercially developed as such. The knowledge on their biology, given in great detail, will provide information for a... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Abundance; Size distribution; Feeding behaviour; Diets; Interspecific relationships; Predation; Food preferences; Shark fisheries; Geographical distribution; Feeding behaviour; Predation; Food preferences; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_6162; Http://aims.fao.org/aos/agrovoc/c_3024. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/1487 |
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| Storero, L.P.. |
| Los caballitos de mar, Hippocampus sp. (Syngnathidae), presentan rasgos característicos: escasa flexibilidad, natación lenta y hábitos sedentarios. Por otra parte, en la bahía San Antonio (Río Negro, Patagonia), el ambiente en el que viven presenta corrientes intensas, amplio rango de fluctuación térmica y variaciones en la disponibilidad de alimento. Estas características ambientales limitarían la capacidad de desplazamiento y predación de la especie, forzando a la adopción de una estrategia alimentaria de tipo oportunista. Los objetivos del presente estudio fueron determinar la composición de la dieta del caballito de mar (Hippocampus sp.) en la bahía San Antonio a partir de contenidos estomacales e intestinales, y evaluar el comportamiento alimentario... |
| Tipo: Theses and Dissertations |
Palavras-chave: Feeding behaviour; Nutrition; Predation; Predator prey interactions. |
| Ano: 2004 |
URL: http://hdl.handle.net/1834/5022 |
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| Garzón-Ferreira, J.; Reyes-Nivia, M.C.. |
| Based on data recorded in 1994 and 1995 during a basile study carried out at four western Cribbean atolls (Albuquerque, Courtown, Roncador and Serrana) of the San Andrés and Providencia archipelago, the incidence of hard coral predation by fishes and its relation witrh tthe abundance of the parrofishes Sparisoma viride and Scarus vetula was analyzed. Among affected corals, Montastraea annularis and M. faveolata showed the highest inciednce of fish bites (29.5% and 18.7% respectively). There were no significant differences between the atolls on the incidence of coral predation by fishes (Kruskall-Wallis, p=0.07). When comparing between geomorphologic units the lagoon showed the highest level of predation (14.3%), and also the largest populations of S.... |
| Tipo: Journal Contribution |
Palavras-chave: Predation; Predation; Http://aims.fao.org/aos/agrovoc/c_6162. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/3188 |
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| 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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| Sujii,Edison Ryoiti; Garcia,Maria Alice; Fontes,Eliana Maria Gouveia; O'Neil,Robert James. |
| The objective of this work was to evaluate the potential control of the ant Pachycondyla obscuricornis Emery (Hymenoptera Formicidae) on populations of nymphs of the spittlebug, Deois flavopicta Stal (Hemiptera Cercopidae). Foraging behavior and prey consumption rate of P. obscuricornis were evaluated. Field data revealed that P. obscuricornis does not show aggressive behavior against individuals of the same species, when they are not carrying a prey; they can patrol distances larger than 10 m searching for prey, and they can build their nest as close as 1 m from each other. The ant has a solitary patrolling habit, there is no recruitment behavior, and individuals dislocate fast, browsing on soil and vegetation for prey. Predation rate on spittlebug nymphs... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Biological control; Foraging behavior; Predation. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004000600014 |
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| Cotterill, Ronald W.. |
| This paper presents a unique empirical analysis of Salop and Scheffmans raising rivals cost theory of predation. The cost efficiency of cooperative wholesaling organizations including the nations largest, Wakefern Food Corporation, are highly susceptible to throughput volume. The Royal Ahold/Pathmark offer to purchase Wakeferns largest member via a bankruptcy proceeding that attempted to supercede its membership contract, if consummated, would have reduced Wakeferns volume by 13 percent. It also would have triggered a domino effect of other member exits because it would have raised the costs of supplying remaining members. This report marshals the available empirical evidence to demonstrate that the predatory move by Royal Ahold and Pathmark would most... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Predation; Market power; Wholesale concentration; Cost efficiency; Industrial Organization. |
| Ano: 2002 |
URL: http://purl.umn.edu/25216 |
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| Cotterill, Ronald W.. |
| In early 2002, the Royal Ahold subsidiary, Stop & Shop Supermarkets, offered to purchase the Big V supermarket chain, which was in bankruptcy court after three successive, unsuccessful leveraged buyouts over the past ten years. At a later date, Pathmark Supermarkets joined the offer to purchase. Big V was Wakefern Food Corporations largest member. The acquisition was a horizontal merger in at least three local markets, Newburgh NJ, Poughkeepsie NY, and Trenton NJ. This research was conducted for the Wakefern Food Corporation who provided much of the underlying data and information. We presented this report to the Bureau of Competition, Federal Trade Commission in March 2002 and to the New Jersey and New York Attorney Generals, Antitrust Section in... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Horizontal merger; Market power; Predation; Agribusiness; Industrial Organization. |
| Ano: 2002 |
URL: http://purl.umn.edu/25194 |
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| Registros recuperados: 134 | |
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