Benthic Communities in the Argentinean Sea

Latest update July 11, 2019 Started on January 1, 2013
sea

We plan to develop low-cost underwater video techniques to monitor benthic communities in the Argentine Sea. Describing and mapping the abundance and diversity of fish, sharks and invertebrate communities in Patagonia Argentina.

January 1, 2013
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Preparation

Happy to have the new Trident with us.
Today we made our first test dives and made our first underwater shots in a coastal area in Puerto Madryn, Chubut. Now we are getting ready to go deeper.

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In The Field

Desarrollamos un sistema de video remoto novedoso para el monitoreo de animales y fondo marino.
Actualmente existen numerosos equipos y diseños con estos fines, pero muchos de ellos son de acceso restringido para grupos de trabajo como el nuestro en Patagonia Argentina, principalmente debido a sus costos o a restricciones de importación. Es sistema que construimos presenta un sistema novel de medición por medio de una escala fija que es captada por la cámara a medida que se avanza. Este equipo permitió explorar comunidades bentónicas del litoral patagónico y llevar a delante diversos experimentos de mapeo de hábitat profundos. Aquí les dejamos algunas imágenes del equipo y un enlace para quienes quieran conocerlo en detalle.

https://www.researchgate.net/publication/328584541Alow-costtowedvideocamerasystemforunderwatersurveyscomparativeperformancewithstandardmethodology

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Cámra de deriva

Primeras imágenes obtenidas con una cámara remota a 35 mts. en el Golfo Nuevo. Aquí un fondo muy interesante donde se pueden ver entre otros a muchos peces Agujas (Leptonotus blainvillianus y Syngnathus folletti).

Posted by ProyectoArrecife on Sunday, December 10, 2017

Trabajo de campo mapeando habitats bentónicos de la zona norte del golfo San Jorge en la Patagonia Argentina. Esta zona es de alta relevancia no solo por la variedad de fauna que en ella habita, si no por ser de interés para las pesquerías locales.
Realizamos numerosas video-transectas a unos 50 m de profundidad para generar imágenes que luego de procesar los videos, nos permitan identificar los tipos de fondo. En algunas ocasiones contamos con el apoyo de equipamiento y personal de otros institutos, como en este caso donde equipamiento de hidroacustica del INIDEP permitió mejorar las clasificaciones realizadas.

Fieldwork mapping benthic habitats of the northern zone of the San Jorge Gulf in the Argentine Patagonia. This area is highly relevant not only because of the variety of fauna that inhabits it, but because it is of interest to local fisheries. We made numerous video transects about 50 m deep to generate images that after processing the videos, allow us to identify the types of background. On some occasions, we have the support of equipment and personnel from other institutes, as in this case where INIDEP hydroacoustic equipment allowed to improve the classifications made.

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A new working day with great sharks in Patagonia leaves us a lot of material to process. In this opportunity, a gatopardo shark pulls a camera from one of the video stations with bait deployed in Patagonia Argentina.


Un nuevo día de trabajo con grandes tiburones en la Patagonia nos deja mucho material para procesar. En esta oportunidad, un tiburón gatopardo saca una cámara de una de las estaciones de video con cebo desplegado en la Patagonia Argentina.

Proyectoarrecife.

Estación de video con cebo

Nuevo video capturado en la última campaña de marcación de tiburones realizada en Agosto. Seguimos atentos al reporte de capturas y agradecemos tu contacto por este medio, al celular +54 9 280 4340994 o al email alejojoaquini@gmail.com se ofrece una pequeña recompensa sobre el proyecto.

Posted by ProyectoArrecife on Friday, September 2, 2016
Expedition Background

Underwater video techniques to monitor benthic communities in the Argentine Sea. Describing and mapping the abundance and diversity of fish, sharks and invertebrate communities in Patagonia Argentina.


We plan to develop low-cost underwater video techniques that can be used for long-term monitoring of fish and invertebrates. Currently, the inclusion of remote video systems is practically null in the research and prospection programs of Argentina. Submarine video technologies have been successfully applied to a wide variety of purposes, including the evaluation of reef fish, sharks, deep-sea scavengers, invertebrates and for the study of marine habitats, among others. For these, we will use a wide variety of camera configurations, mounted on fixed remote stations (video stations with and without bait) or connected to mobile devices. The implementation of monitoring techniques capable of generating reliable data through non-invasive methods is essential to evaluate the general state of the biological communities and the efficiency of some management strategies in sensitive ecological systems, such as rocky reefs, as well as the anthropic effects generated by the direct and indirect use of marine systems. We have used fixed video stations with baits to estimate the population structure of carnivorous reef fish in different rock reefs of the Patagonian coasts. In this work we developed a novel system to estimate the size of fish using a video camera and a mirror surface on the seabed (MBRUV). We have also managed to use fixed video stations with bait (BRUVS), to estimate the relative abundances of large sharks on the coasts of Peninsula Valdés. We are working on the development of drift chambers for habitat mapping and for the evaluation of large underwater areas. So far we use home-made video equipment to evaluate benthic communities in areas under the impact of the trawl fishery.

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Gatopardos en Patagonia

Nuevo video capturado por las cámaras de ProyectoArrecife, donde se pueden ver varios ejemplares de tiburón Gatopardo (Notorynchus cepedianus) en las costas patagonicas.

Posted by ProyectoArrecife on Friday, September 23, 2016

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