Results 1 to 10 of about 144 (95)

Preliminary results of the empirical validation of daily increments in otoliths of jack mackerel Trachurus symmetricus murphyi (Nichols, 1920) marked with oxytetracycline

open access: yesScientia Marina, 2003
The frequency of microincrement formation in sagittae otoliths of jack mackerel Trachurus symmetricus was validated using experiments on captive fish. Adult jack mackerel were injected with a dose of 100 mg of oxytetracycline/kg of fish.
MIGUEL Araya, Hugo Arancibia
exaly   +6 more sources

Molecular identification and epidemiological data of Anisakis spp. (Nematoda: Anisakidae) larvae from Southeastern Pacific Ocean off Peru [PDF]

open access: yesInternational Journal for Parasitology: Parasites and Wildlife, 2021
The objective of this study is to determine the infection status of nematode larvae and record epidemiological molecular data in commercial fish from the southeast Pacific off the central coast of Peru.
Rosa Martínez-Rojas   +6 more
doaj   +2 more sources

Rhadinorhynchus oligospinosus n. sp. (Acanthocephala, Rhadinorhynchidae) from mackerels in the Pacific Ocean off Peru and related rhadinorhynchids in the Pacific, with notes on metal analysis [PDF]

open access: yesParasite, 2017
Specimens of a new species of Rhadinorhynchus Lühe, 1911 are described from the chub mackerel Scomber japonicus (Scombridae) and the Chilean Jack mackerel Trachurus murphyi (Carangidae) (possibly a subspecies of Trachurus symmetricus) from the Pacific ...
Amin Omar M., Heckmann Richard A.
doaj   +2 more sources

Accuracy of the Kirchhoff-approximation and Kirchhoff-ray-mode fish swimbladder acoustic scattering models. [PDF]

open access: yesPLoS ONE, 2013
The acoustic backscatter from pressure release prolate spheroids and a three-dimensional representation of a fish swimbladder (Chilean jack mackerel, Trachurus symmetricus murphyi) was calculated using four target strength models (Kirchhoff-approximation,
Gavin J Macaulay   +4 more
doaj   +2 more sources

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.
Hugo Arancibia, Arancibia Hugo
exaly   +3 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
Claudio Gatica, Luis A Cubillos
exaly   +3 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.
Luis A Huckstadt
exaly   +2 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-
Hector Pena, Kenneth G Foote
exaly   +2 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.
Luis A Huckstadt
exaly   +2 more sources

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