Results 11 to 20 of about 931 (142)

Dinámica trófica del jurel (Trachurus symmetricus murphyi) en el norte de Chile [PDF]

open access: yesInvestigaciones marinas, 2002
The trophic dynamic of jack mackerel Trachurus symmetricus murphyi, caught off the coast of northern Chile, between the spring 1993 and winter 1994, is described. Relative importance of prey taxa, identification of ontogenetic trophic units and prey selectivity by size was evaluated.
Medina, Marianela, Arancibia, Hugo
openaire   +4 more sources

Precisión en los estimados de distribución de frecuencias de tallas de jurel, Trachurus symmetricus [PDF]

open access: yesInvestigaciones marinas, 2003
In central-south Chile, the jack mackerel (Trachurus symmetricus) resource conforms disperse aggregations in a reproductive condition in oceanic waters, and obtaining representative samples to estimate populational attributes as size composition and mean size is difficult. In this paper, the precision of these attributes was analyzed through resampling
Gatica, Claudio   +2 more
openaire   +4 more sources

Modelling the target strength of Trachurus symmetricus murphyi based on high-resolution swimbladder morphometry using an MRI scanner [PDF]

open access: yesICES Journal of Marine Science, 2008
Abstract Peña, H., and Foote, K. G. 2008. Modelling the target strength of Trachurus symmetricus murphyi based on high-resolution swimbladder morphometry using an MRI scanner. – ICES Journal of Marine Science, 65: 1751–1761. The acoustic target strength (TS) of Chilean jack mackerel (Trachurus symmetricus murphyi) was computed from three-
Héctor Peña, Kenneth G. Foote
openaire   +3 more sources

Interaction between southern sea lions Otaria flavescens and jack mackerel Trachurus symmetricus commercial fishery off Central Chile: a geostatistical approach [PDF]

open access: yesMarine Ecology Progress Series, 2004
A spatial description of the operational interaction between southern sea lions and jack mackerel fishing fleet off Central Chile is presented. The descriptive analysis showed a similar spatial trend for the number of sea lions per haul and catch per haul, both increasing in the SE direction, and decreasing in the NW direction.
LA Hückstädt, MC Krautz
openaire   +3 more sources

BACTERIAL FORMATION OF HISTAMINE IN JACK MACKEREL (TRACHURUS SYMMETRICUS)

open access: yesJournal of Food Processing and Preservation, 2004
Peak histamine concentrations of 0.023, 0.031 and 0.027 g histamine/ 100 g muscle and maximal bacteria concentrations of 1.75, 1.59 and 0.423 g dry cells/100 g muscle were observed in muscles of jack mackerel stored at 25, 15 and 5C, respectively. Incubated fish homogenates suggest rate and transport limitations in histamine formation in muscle.
Bermejo, A   +3 more
openaire   +5 more sources

Behaviour of the southern sea lion (Otaria flavescens) and consumption of the catch during purse-seining for jack mackerel (Trachurus symmetricus) off central Chile [PDF]

open access: yesICES Journal of Marine Science, 2003
AbstractThe fishery for jack mackerel (Trachurus symmetricus) off central Chile competes for the resource with southern sea lions (Otaria flavescens), and during purse-seining makes the fish more accessible to the pinnipeds. Interactions with sea lions were recorded during 31 purse-seine sets off central Chile during October 1999.
L.A Hückstädt, T Antezana
openaire   +3 more sources

Análisis de las tasas de captura de jurel (Trachurus symmetricus) en la zona centro-sur de Chile (1987-1999) [PDF]

open access: yesInvestigaciones marinas, 2002
Catch per unit effort (CPUE) data from the jack mackerel fishery operating in central-south Chile and covering the period 1987-1999 are analyzed in order to detect changes in relative abundance. Two units for fishing effort were used to compute the catch rate: number of days outside port and the number of trips with capture. The fleet was classified in
Gatica, Claudio, Cubillos, Luis
openaire   +4 more sources

Characterizing habitat suitability for a central-place forager in a dynamic marine environment. [PDF]

open access: yesEcol Evol, 2018
We combine satellite telemetry, near‐real‐time remotely sensed oceanography, and statistical models to explore how lactating California sea lions (Zalophus californianus, n = 72) may select habitat and respond to environmental variability over broad spatial and temporal scales within the California Current System.
Briscoe DK   +11 more
europepmc   +2 more sources

In situ target-strength measurements of Chilean jack mackerel (Trachurus symmetricus murphyi) collected with a scientific echosounder installed on a fishing vessel [PDF]

open access: yesICES Journal of Marine Science, 2008
AbstractPeña, H. 2008. In situ target-strength measurements of Chilean jack mackerel (Trachurus symmetricus murphyi) collected with a scientific echosounder installed on a fishing vessel. – ICES Journal of Marine Science 65: 594–604. The use of commercial fishing vessels for scientific purposes has increased worldwide in the past 10 years.
openaire   +3 more sources

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