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Listar por palabra clave "Target strength"

Mostrando ítems 1-15 de 15

Biomass estimation of bluefin tuna in sea cages by the combined use of acoustic and optical techniques

Puig Pons, Vicente; Espinosa Roselló, Víctor; Soliveres González, Ester; Ortega, Aurelio; Belmonte, Antonio; De la Gandara Garcia, Fernando (International Commission for the Conservation of Atlantic Tunas (ICCAT), 2012)

[EN] In this paper, an experimental setup to estimate the biomass of caged bluefin tuna (Thunnus thynnus) in the Spanish Mediterranean coast is presented. Aims are to monitor individual tuna during all stages of growth, ...
Caracterización del target strength de piensos comerciales mediante ecosondas monohaz y de haz partido

Llorens Escrich, Susana (Universitat Politècnica de València, 2016-11-21)

Una de las líneas de investigación en acuicultura está enfocada a reducir los impactos económicos y ambientales relacionados con la dispensación excesiva de alimento en las jaulas submarinas. La acústica submarina puede ...
Detection and target strength measurements of uneaten feed pellets with a single beam echosounder

Llorens-Escrich, Susana; Pérez Arjona, Isabel; Soliveres, Ester; Espinosa Roselló, Víctor (Elsevier, 2017)

[EN] The possibility of detecting uneaten food pellets in aquaculture floating cages using a scientific single beam echosounder is demonstrated. The applied methodology is based in a basic scheme with the ultrasonic beam ...
Dispositiu i mesura del factor de blanc (Target Strength) de la torituga Caretta Caretta

Císcar Bayarri, Ricardo (Universitat Politècnica de València, 2016-04-06)

L'objectiu principal del present estudi és la mesura del factor de blanc (TS, de les sigles en anglès Target Strength) corresponent a la tortuga Caretta Caretta, mitjançant la utilització d’una ecosonda. El valor del TS ...
Estimación de biomasa de peces en granjas marinas mediante ultrasonidos

Soliveres González, Ester (Universitat Politècnica de València, 2015-12-09)

[EN] Marine aquaculture production has increased considerably in recent years due to the scarcity of fisheries resources and increased demand. Gilthead sea bream and European sea bass are among the most interesting species ...
Estimación indirecta del target strength (TS) con ecosondas científicas de haz simple

Cebrecos Ruiz, Alejandro (Universitat Politècnica de València, 2011-03-14)

El objetivo de este trabajo es desarrollar y comprobar la fiabilidad de una aplicación de procesado pensada para la medida indirecta de la potencia de blanco (TS) de peces, con vistas a la integración de ésta en una ecosonda ...
Estimation of Bluefin Tuna (Thunnus thynnus) mean length in sea cages by acoustical means

Puig Pons, Vicente; Muñoz-Benavent, Pau; Pérez Arjona, Isabel; Ladino-Velásquez, Anderson; Llorens-Escrich, Susana; Andreu García, Gabriela; Valiente González, José Miguel; Atienza-Vanacloig, Vicente; Ordoñez-Cebrian, Patricia; Pastor Gimeno, José Ismael; Espinosa Roselló, Víctor (Elsevier, 2022-08)

[EN] This paper proposes an indirect method to estimate Bluefin Tuna (Thunnus thynnus) biomass in cages using acoustic techniques. Two Simrad EK60 echosounders working at 120 and 200 kHz and a stereo camera were used to ...
Ex situ and in situ target strength measurements of European anchovy in the Bay of Biscay

Sobradillo, B.; Boyra, G.; Pérez Arjona, Isabel; Martínez, U.; Espinosa Roselló, Víctor (Oxford University Press, 2021-07)

[EN] This study measures the dorsal aspect target strength (TS; dB re 1¿m2) and TS¿length (standard length, SL; cm) relationships for European anchovy, attained both ex situ and in situ in two different seasons across 7 ...
Influence of fish backbone model geometrical features on the numerical target strength of swimbladdered fish

Pérez Arjona, Isabel; Godinho, L.; Espinosa Roselló, Víctor (Oxford University Press, 2020-12)

[EN] The method of fundamental solutions has been applied to evaluate the influence of fish models geometrical features on the target strength (TS) directivity and TS frequency response of swimbladdered fish. Simplified ...
Mesures a distàncies pròximes del TS de la daurada: muntatge i calibratge del dispositiu experimental

Alberola Canet, Teresa (Universitat Politècnica de València, 2013-01-28)

This project's aim is to execute an experimental device assembly situated in Gandia's Port and to calibrate the transducers and echo sounder systems that will be used subsequently for the giltheade bream Target Strength ...
Monitorización acústica del desarrollo larvario de dorada (Sparus Aurata) y atún rojo (Thunnus thynnus) en tanques

Muñoz Andrade, Felipe Andrés (Universitat Politècnica de València, 2019-10-23)

[ES] Se obtuvieron valores de potencia del blanco o Target Strength (TS) de ecoregistros de ecosondas de 200 kHz en un tanque de crecimiento de doradas (Sparus aurata) y ecoregistros de ecosondas de 200 kHz y 333 kHz en ...
Monitorización y medida de atunes en jaulas mediante el uso combinado de técnicas acústicas y ópticas

Puig Pons, Vicente (Universitat Politècnica de València, 2011-03-14)

Este trabajo presenta un dispositivo experimental diseñado para poder monitorizar el crecimiento del atún rojo (Thunnus thynnus) en jaulas ,mediante la combinación de técnicas ópticas y acústicas . Las medidas obtenidas ...
Role of material properties in acoustical target strength: Insights from two species lacking a swimbladder

Ladino-Velásquez, Anderson; Pérez Arjona, Isabel; Espinosa Roselló, Víctor; CHILLARÓN-PÉREZ, MÓNICA; Vidal-Gimeno, Vicente-Emilio; GODINHO, LUIS; Moreno, G.; Boyra, G. (Elsevier, 2024-02)

[EN] Acoustic target strength (TS) is a key parameter for species identification and stock assessment in fisheries. The TS of fish is influenced by the contrast in acoustic impedance between their tissues and the surrounding ...
Target strength measurements of gilthead sea bream with single-beam quantitative echosounder

Llorens Escrich, Susana; Soliveres, Ester; Pérez Arjona, Isabel; Espinosa Roselló, Víctor; Puig Pons, Vicente; Ordoñez Cebrian, Patricia (Universidade do Porto, 2016-06-15)

[EN] Target strength (TS) measurements for ventral aspect of gilthead sea bream (Sparus aurata) have been performed in a scaled aquaculture cage. The measurements have been made with a Simrad EK-60 scientific echososunder ...
Ultrasonic monitoring of early larval development of fish in tanks. Case study: Gilthead seabream (Sparus aurata)

Ladino-Velásquez, Anderson; Puig Pons, Vicente; Espinosa Roselló, Víctor; Pérez Arjona, Isabel; De la Gandara García, Fernando; Ortega, A. (Elsevier, 2022)

[EN] Swimbladder inflation is a significant matter in intensive fish farming, since it is related to larval survival rate and the morphological quality of individuals. In this work, we propose a non-invasive acoustic ...