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Search Results: 1 - 10 of 225549 matches for " Leonardo Abitia-Cárdenas "
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Daily food intake of Kajikia audax (Philippi, 1887) off Cabo San Lucas, Gulf of California, Mexico
Abitia-Cárdenas,Leonardo A; Galván-Maga?a,Felipe; Cruz-Escalona,Víctor H; Peterson,Mark S; Rodríguez-Romero,Jesús;
Latin american journal of aquatic research , 2011,
Abstract: the daily food intake rates of the striped marlin, kajikia audax (perciformes: istiophoridae), were estimated using qualitative and quantitative analyses of their trophic spectrum. we analyzed the stomach contents of 505 striped marlin caught by the sport fishing fleet off cabo san lucas, baja california sur, mexico, sampled from october 1987 through december 1989. the most important preys were chub mackerel (scomber japonicus), california pilchard (sardinops caeruleus), and jumbo squid (dosidicus gigas); together these represented ~55% of the striped marlin diet. the daily food consumption was estimated to be 2 kg per day, or ~3.6% of the mean body weight of k. audax. the total biomass of the prey consumed by the striped marlin during the 27 months of sampling around los cabos was estimated at 24.8 ton, of which the chub mackerel represented ~29% (7.2 ton), california pilchard just under 16% (3.9 ton), and jumbo squid ~10% (2.5 ton). the feeding habits of k. audax are discussed in terms of the distribution of the epipelagic (neritic and oceanic zones), demersal, and benthic prey, confirming that striped marlin migrate vertically and horizontally in search of their food.
Feeding of blue marlin Makaira nigricans off Mazatlan, Sinaloa, Mexico
Abitia-Cárdenas,Leonardo; Arizmendi-Rodríguez,Dana; Gudi?o-González,Napoleón; Galván-Maga?a,Felipe;
Latin american journal of aquatic research , 2010,
Abstract: we analyzed the stomach contents of 52 blue marlins caught between october 2002 and october 2004 by the sport-fishing fleet of mazatlan, sinaloa, in the gulf of california, mexico. blue marlin feed on 15 food items. according to the index of relative importance (iri), the most important prey were the frigate or bullet mackerel auxis spp. (52%) and jumbo squid dosidicus gigas (30%).
Trophic spectrum of the juvenile roosterfish, Nematistius pectoralis Gill, 1862 (Perciformes: Nematistiidae), in Almejas Bay, Baja California Sur, Mexico
Rodríguez-Romero,Jesús; Moreno-Sánchez,Xchel G; Abitia-Cárdenas,Leonardo A; Palacios-Salgado,Deivis S;
Revista de biología marina y oceanografía , 2009, DOI: 10.4067/S0718-19572009000300026
Abstract: este trabajo es la primera contribución al conocimiento de la dieta del pejegallo nematistius pectoralis, capturado en bahía almejas, baja california sur, méxico. se describe cualitativa y cuantitativamente el espectro trófico de 59 ejemplares de n. pectoralis, usando los métodos tradicionales de frecuencia de aparición, numérico y peso, así como el índice de importancia relativa. en total se identificaron 10 especies-presa de las cuales 9 fueron peces y un cefalópodo. se determino que el pejegallo, es un depredador ictiófago activo el cual incide principalmente sobre especies de peces que forman cardúmenes como los son eucinostomus dowii, e. gacilis, anchoa ischana y anchoa spp.
Rocky-reef fish assemblages at San José Island, Mexico
Villegas-Sánchez, Carmen Amelia;Abitia-Cárdenas, Leonardo Andrés;Gutiérrez-Sánchez, Francisco Javier;Galván-Maga?a, Felipe;
Revista mexicana de biodiversidad , 2009,
Abstract: we analyzed the composition, diversity, and abundance of marine fish at rocky reefs off san josé island, mexico between october 2001 and august 2002. fish species were recorded using a visual census in 5 sampling areas of 50 by 5 meters at 2 depths, shallow (1-3 meters) and intermediate (5-7 meters). a total of 26 946 organisms were counted, belonging to 84 species. the families serranidae (9 species), labridae (8), pomacentridae (7), and haemulidae (6) were the most representative. we measured the rugosity of the bottom surface, which showed a positive relationship with abundance, richness, and fish diversity. the ocean bottom off san josé island is covered with various size rocks that offer more feeding and refuge areas to fish assemblages than other areas. the ecological index increased during the warm season. diversity and richness showed significant variations (p<0.05) by depth, with the highest values in exposed locations around the island (conejo, pardito, and san francisquito). the biological value index indicated that the most representative fish species were stegastes rectifraenum, abudefduf troschelii, thalassoma lucasanum, scarus ghobban, and mulloidichthys dentatus. the depth and wave exposure were the 2 environmental variables with the most influence on the structure of rocky-reef fish assemblages.
Daily food intake of Kajikia audax (Philippi, 1887) off Cabo San Lucas, Gulf of California, Mexico Tasa de consumo diario de alimento de Kajikia audax (Philippi, 1887) frente a Cabo San Lucas, golfo de California, México
Leonardo A Abitia-Cárdenas,Felipe Galván-Maga?a,Víctor H Cruz-Escalona,Mark S Peterson
Latin american journal of aquatic research , 2011,
Abstract: The daily food intake rates of the striped marlin, Kajikia audax (Perciformes: Istiophoridae), were estimated using qualitative and quantitative analyses of their trophic spectrum. We analyzed the stomach contents of 505 striped marlin caught by the sport fishing fleet off Cabo San Lucas, Baja California Sur, Mexico, sampled from October 1987 through December 1989. The most important preys were chub mackerel (Scomber japonicus), California pilchard (Sardinops caeruleus), and jumbo squid (Dosidicus gigas); together these represented ~55% of the striped marlin diet. The daily food consumption was estimated to be 2 kg per day, or ~3.6% of the mean body weight of K. audax. The total biomass of the prey consumed by the striped marlin during the 27 months of sampling around Los Cabos was estimated at 24.8 ton, of which the chub mackerel represented ~29% (7.2 ton), California pilchard just under 16% (3.9 ton), and jumbo squid ~10% (2.5 ton). The feeding habits of K. audax are discussed in terms of the distribution of the epipelagic (neritic and oceanic zones), demersal, and benthic prey, confirming that striped marlin migrate vertically and horizontally in search of their food. Se estimó la tasa de consumo diario de alimento del marlín rayado Kajikia audax (Perciformes: Istiophoridae), sobre la base de análisis cualitativos y cuantitativos de su espectro trófico. Se analizó el contenido estomacal de 505 ejemplares capturados por la flota deportiva frente a Cabo San Lucas, Baja California Sur, México muestreados de octubre 1987 a diciembre 1989. Las presas más importantes fueron la macarela del Pacífico (Scomber japonicus), sardina monterrey (Sardinops caeruleus) y calamar gigante (Dosidicus gigas), que en conjunto representaron aproximadamente el 55% de la dieta. La tasa de consumo de alimento fue estimado en 2 kg diarios, lo cual representó aproximadamente el 3,6% del peso corporal de K. audax. La biomasa total de presas consumidas por el marlín rayado durante los 27 meses muestreados en la zona de Los Cabos fue estimada en 24,8 ton, de las cuales la macarela del Pacífico representó alrededor del 29% (7,2 ton), la sardina monterrey poco menos del 16% (3,9 ton) y el calamar gigante aproximadamente el 10% (2,5 ton). Los hábitos alimentarios de K. audax se discutieron según la distribución de las presas epipelágicas (neríticas y oceánicas), demersales y bentónicas; lo cual confirmó la conducta migratoria (movimientos verticales y horizontales) del marlín rayado en busca de su alimento.
Feeding of blue marlin Makaira nigricans off Mazatlan, Sinaloa, Mexico Alimentación del marlin azul Makaira nigricans del área de Mazatlán, Sinaloa, México
Leonardo Abitia-Cárdenas,Dana Arizmendi-Rodríguez,Napoleón Gudi?o-González,Felipe Galván-Maga?a
Latin american journal of aquatic research , 2010,
Abstract: We analyzed the stomach contents of 52 blue marlins caught between October 2002 and October 2004 by the sport-fishing fleet of Mazatlan, Sinaloa, in the gulf of California, Mexico. Blue marlin feed on 15 food items. According to the index of relative importance (IRI), the most important prey were the frigate or bullet mackerel Auxis spp. (52%) and jumbo squid Dosidicus gigas (30%). Se analiza el contenido estomacal de 52 marlines azules capturados por la flota de pesca deportiva que operó en el área de Mazatlan, Sinaloa, en el golfo de California, México, durante el periodo octubre 2002 a octubre 2004. El marlin azul se alimenta de 15 categorías alimenticias (ítemes), de las cuales las más importantes de acuerdo al índice de importancia relativa (IRI), fueron el pez melva Auxis spp. (52%) y el calamar gigante Dosidicus gigas (30%).
Rocky-reef fish assemblages at San José Island, Mexico Asociaciones de peces de arrecifes rocosos en Isla San José, México
Carmen Amelia Villegas-Sánchez,Leonardo Andrés Abitia-Cárdenas,Francisco Javier Gutiérrez-Sánchez,Felipe Galván-Maga?a
Revista mexicana de biodiversidad , 2009,
Abstract: We analyzed the composition, diversity, and abundance of marine fish at rocky reefs off San José island, Mexico between October 2001 and August 2002. Fish species were recorded using a visual census in 5 sampling areas of 50 by 5 meters at 2 depths, shallow (1-3 meters) and intermediate (5-7 meters). A total of 26 946 organisms were counted, belonging to 84 species. The families Serranidae (9 species), Labridae (8), Pomacentridae (7), and Haemulidae (6) were the most representative. We measured the rugosity of the bottom surface, which showed a positive relationship with abundance, richness, and fish diversity. The ocean bottom off San José island is covered with various size rocks that offer more feeding and refuge areas to fish assemblages than other areas. The ecological index increased during the warm season. Diversity and richness showed significant variations (P<0.05) by depth, with the highest values in exposed locations around the island (Conejo, Pardito, and San Francisquito). The biological value index indicated that the most representative fish species were Stegastes rectifraenum, Abudefduf troschelii, Thalassoma lucasanum, Scarus ghobban, and Mulloidichthys dentatus. The depth and wave exposure were the 2 environmental variables with the most influence on the structure of rocky-reef fish assemblages. Se analizó la estructura íctica de los arrecifes rocosos de Isla San José, México entre octubre del 2001 y agosto del 2002. Las especies fueron registradas por medio de censos visuales, los cuales se realizaron sobre transectos de 50 m de largo X 5 m de ancho en 2 profundidades: somera (1-3 m) e intermedia (5-7 m). Se contabilizaron un total de 26 946 individuos pertenecientes a 84 especies. Las familias mejor representadas fueron Serranidae (9), Labridae (8), Pomacentridae (7) y Haemulidae (6). La rugosidad del sustrato presentó una correlación positiva con la abundancia, riqueza y diversidad de especies de peces, lo que podría indicar que zonas con altos valores de rugosidad ofrecen a los peces más áreas de alimentación y refugio. Los índices ecológicos mostraron una tendencia de incremento de especies durante la temporada cálida. La diversidad y riqueza específica presentaron variaciones significativas entre profundidades (P<0.05), con valores más altos en los sitios expuestos de la isla ( Conejo, Pardito y San Francisquito). El índice de valor biológico indicó que las especies más representativas fueron: Stegastes rectifraenum, Abudefduf troschelii, Thalassoma lucasanum, Scarus ghobban y Mulloidichthys dentatus. La profundidad y exposición a
General characteristics of the diet of Trachinotus paitensis (Teleostei: Carangidae) from San Ignacio Lagoon, Baja California Sur, Mexico
Cruz Escalona,V.H.; Abitia Cárdenas,L.A.;
Revista de Biología Tropical , 2004,
Abstract: the food habits of trachinotus paitensis, in san ignacio lagoon b.c.s., mexico, were investigated. we observed that t. paitensis is carnivorous, feeding mainly on benthic invertebrates (the gastropods anachis spp., bittium spp., and the crustacean larvae). we concluded that t. paitensis is an opportunist predator that impacts mainly on epibenthic invertebrates
General characteristics of the diet of Trachinotus paitensis (Teleostei: Carangidae) from San Ignacio Lagoon, Baja California Sur, Mexico
V.H. Cruz Escalona,L.A. Abitia Cárdenas
Revista de Biología Tropical , 2004,
Abstract: The food habits of Trachinotus paitensis, in San Ignacio Lagoon B.C.S., Mexico, were investigated. We observed that T. paitensis is carnivorous, feeding mainly on benthic invertebrates (the gastropods Anachis spp., Bittium spp., and the crustacean larvae). We concluded that T. paitensis is an opportunist predator that impacts mainly on epibenthic invertebrates Fueron investigados los hábitos alimenticios de Trachinotus paitensis, en la laguna San Ignacio B.C.S., México. Se observó que T. paitensis es carnívoro, y se alimenta principalmente de invertebrados bénticos (los gastrópodos Anachis spp., Bittium spp., y larvas de crustáceos). En conclusión esta especie es un depredador oportunista que tiene un impacto principalmente sobre las poblaciones de invertebrados epibénticos
?ES COMPATIBLE LA RELATIVIDAD CONCEPTUAL CON UN ESENCIALISMO GENUINO?
Cárdenas Casta?eda,Leonardo;
Discusiones Filosóficas , 2007,
Abstract: this article is a response to arango's paper (2006) on an essentialist metaphysics with the aggregate of conceptual relativity. in general, i show that the essentialists, among them kripke, developed this notion based upon an equivocal than i believe dangerous. the point is that if essentialism is a theory that explains the existence of natural kinds independently of our patterns of individuation, their partisans should not appeal to examples that involve institutional facts. due to this defect, the arguments of the essentialists are not satisfactory. i also intend to show two more faults of an essentialist theory. firstly, i think that there is a conflation between the material mode of speech and orations of real objects. finally, i explain why arango commits an error in the assignment of a function.
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