XOVES 23 Nov.  20:00h

Documental   SILUROS: AS QUENLLAS DO RÍO

Francia. 45 minutos. Español

Produción, guión e dirección: Bertrand Loyer  Imaxe subacuática: Jean Charles Granjon, Roberto Rinaldi e outros  Música: Samuel Safa  Produción:  National Geographic Channel/ Arte France

RHONE RIVER, FRANCE – Catfish Fishermen with the ultimate trophy: an albinos catfish. This is one of the largest ever caught. (Photo Credit: Saint Thomas Productions)

SAINT CASSIEN LAKE, FRANCE – Catfish in the waters of the Saint Cassien Lake. Fish were introduced by men in 1991 and 1992 to indulge sport fishermen. Today, very large specimens can be found in the lake. (Photo Credit: Saint Thomas Productions)

SAINT CASSIEN LAKE, FRANCE – Catfish in the waters of the Saint Cassien lake. Fish were introduced by men in 1991 and 1992 to indulge sport fishermen. Today, very large specimens can be found in the lake. (Photo Credit: Saint Thomas Productions)

RHONE RIVER, FRANCE – Divers are taking samples on catfish in the Rhone River to determine on which prey they feed. (Photo Credit: Saint Thomas Productions)

RHONE RIVER, FRANCE – Close-up shot of the head of a catfish that has just been caught. (Photo Credit: Saint Thomas Productions)

FRANCE – Catfish and frio trout. (Photo Credit: Saint Thomas Productions)

RHONE RIVER, FRANCE – Since 2005, catfish gather in the Rhone River to form large groups. These congregations can last several days. ItÕs the largest concentration of freshwater biomass in the world. (Photo Credit: Saint Thomas Productions)

RHONE RIVER, FRANCE – These fishermen practice catch-and-release. Like most catfish fishermen in Western Europe, they measure their trophy then return the animal back to the water still alive. (Photo Credit: Saint Thomas Productions)

ALBI, FRANCE – In the French city of Albi, along the the Tarn river, catfish have learnt to beach themselves to catch pigeons. (Photo Credit: Saint Thomas Productions)

PO RIVER, ITALY – Amateur fisherman, Dino Ferrari, has been looking for a record-breaking catfish for the last twenty years. Measuring eight feet nine inches and weighing 280 pounds, this thirty-year-old catfish is officially the largest ever caught with a rod and reel. (Photo Credit: Saint Thomas Productions)

Sinopse

O siluro, que con ata 2,67 metros é o peixe de auga doce máis grande de Europa, está a evolucionar rápidamente a medida que coloniza novos ríos. Actualmente atópanse exemplares que mostran novos comportamentos, cores e tamaños. Especie invasora en ríos e pantanos españois, chegan a andar polos tres metros de lonxitude, son voraces e nos últimos anos adoitaron cazar animais que transitan polas beiras.

XOVES 23 Nov. 20:45h

Documental   MAREAS VERMELLAS

Galicia. 23 minutos. Galego

Dirección: Manuel E. Garci e Jorge H. Urcera  Guión: María R. Rei  Imaxe submarina: Manuel E. Garci e Jorge H. Urcera  Música orixinal: Virandeira folk Realización: Inxenia Audiovisual

© Manuel E. Garci

 Sinopse

No audiovisual Mareas vermellas preténdese esclarecer as diferencias existentes entre un episodio tóxico e unha marea vermella, ao mostrar a relación entre as condicións oceanográficas e a dinámica fitoplanctónica responsable da presenza de especies tóxicas e da acumulación de biotoxinas nos moluscos filtradores. O documental explica os tipos de biotoxinas detectadas, as especies de fitoplancto que as producen, así como as causas e os factores que determinan a aparición dos fenómenos tóxicos nas rías e as súas consecuencias sobre a explotación de moluscos bivalvos. Ademais, o audiovisual pretende achegar ao público o papel da comunidade científica na investigación de sistemas fiables de detección e métodos de análises exhaustivas que consigan a prevención ou a detección anticipada dos episodios tóxicos.