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Tegnue
Tegnue (singular tegnua) are rock formations which have developed in the sea bottom of the Gulf of Venice, in the northern Adriatic Sea. They are bio-sediments which are very similar to coral reefs and for this reason they also are called Adriatic coral reefs. They are found especially off the coasts of Caorle, the Cavallino peninsula, the Lido di Venezia island and the Sottomarina peninsula at Chioggia. There are eight such formations. They are at a depth of -15/-40 m. The largest formation is off the coast of the Cavallino peninsula.
Tegnue is a Venetian dialect word which means "held back." The name was given by fishermen whose nets got caught in these rocks at the bottom of the sea, which held them back.
ARPAV, the Agenzia Regionale per la Prevenzione a Protezione Ambientale del Veneto (Veneto Regional Agency for Environmental Prevention and Protection) carried out three research projects which were part of international, national and local programmes between 2003 and 2007. The first was a collaboration between the Veneto and the Friuli-Venezia Giulia regions and Slovenia for a regional oversight project called “Development of studies monitoring activities of the evolution of the sea coast ecosystem aimed at safeguard, integrated management and enhancement of the resources of the sea.” The second was part of the 6th three-year national plan for Fishing and Aquaculture called “The tegnue: studies of some areas of particular environmental interest for the enhancement of local halieutic resources and nature safeguard.” The third was part of an “Interventions for the safeguard and enhancement of a repopulation sea oasis called Porto Falconara Tegnua” project which was part of a plan for the Caorle area.
The aims of the projects were to establish the Upper Adriatic Observatory as a regional hub, to coordinate the activities of local authorities, organisations and research institutes, to provide technical, scientific and service support for the regional policies regarding the improvement and safeguard of the quality of the coastal sea waters, to establish a Veneto sea databank, to establish monitoring of pollution, to enhance and support sustainable tourist activities, to safeguard and enhance areas of natural interest, to promote and disseminate information for an environmental education culture, and to study some areas of particular environmental interest for the enhancement of local fishing resources and the safeguard of nature.
ARPAV carried out geomorphologic and granulometric, structural, mineralogical and biological research. The results were published by ARPAV in conjunction with the Natural History Museum of Venice in 2010 with the title “The Upper Adriatic tegnue: enhancement of marine resources through the study of areas of environmental value”. The printed edition is out of print, but it can be downloaded from the ARPAV website.
Eight tegnue have been mapped out off the Veneto shore of the Gulf of Venice:
The Caorle tegnua is off the shore of Caorle. The Cavallino Vicina, D’Ancona, Cavallino Lontana and Sorse tegnue are off the shore of Cavallino peninsula. The Malamocco and Venezia are off the shore of the Lido di Venezia island. The Chioggia tegnua is off the shore of Sottomarina peninsula, Chioggia.
The sizes of the tegnue can be very different, from a few to several thousands of square metres, with elevations from the bottom form a few tens of centimetres in the low formations, sometimes called "lastrure" (slab formations) and a few metres in the higher ones, which are often found at greater depths. There are three types of formations:
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Tegnue
Tegnue (singular tegnua) are rock formations which have developed in the sea bottom of the Gulf of Venice, in the northern Adriatic Sea. They are bio-sediments which are very similar to coral reefs and for this reason they also are called Adriatic coral reefs. They are found especially off the coasts of Caorle, the Cavallino peninsula, the Lido di Venezia island and the Sottomarina peninsula at Chioggia. There are eight such formations. They are at a depth of -15/-40 m. The largest formation is off the coast of the Cavallino peninsula.
Tegnue is a Venetian dialect word which means "held back." The name was given by fishermen whose nets got caught in these rocks at the bottom of the sea, which held them back.
ARPAV, the Agenzia Regionale per la Prevenzione a Protezione Ambientale del Veneto (Veneto Regional Agency for Environmental Prevention and Protection) carried out three research projects which were part of international, national and local programmes between 2003 and 2007. The first was a collaboration between the Veneto and the Friuli-Venezia Giulia regions and Slovenia for a regional oversight project called “Development of studies monitoring activities of the evolution of the sea coast ecosystem aimed at safeguard, integrated management and enhancement of the resources of the sea.” The second was part of the 6th three-year national plan for Fishing and Aquaculture called “The tegnue: studies of some areas of particular environmental interest for the enhancement of local halieutic resources and nature safeguard.” The third was part of an “Interventions for the safeguard and enhancement of a repopulation sea oasis called Porto Falconara Tegnua” project which was part of a plan for the Caorle area.
The aims of the projects were to establish the Upper Adriatic Observatory as a regional hub, to coordinate the activities of local authorities, organisations and research institutes, to provide technical, scientific and service support for the regional policies regarding the improvement and safeguard of the quality of the coastal sea waters, to establish a Veneto sea databank, to establish monitoring of pollution, to enhance and support sustainable tourist activities, to safeguard and enhance areas of natural interest, to promote and disseminate information for an environmental education culture, and to study some areas of particular environmental interest for the enhancement of local fishing resources and the safeguard of nature.
ARPAV carried out geomorphologic and granulometric, structural, mineralogical and biological research. The results were published by ARPAV in conjunction with the Natural History Museum of Venice in 2010 with the title “The Upper Adriatic tegnue: enhancement of marine resources through the study of areas of environmental value”. The printed edition is out of print, but it can be downloaded from the ARPAV website.
Eight tegnue have been mapped out off the Veneto shore of the Gulf of Venice:
The Caorle tegnua is off the shore of Caorle. The Cavallino Vicina, D’Ancona, Cavallino Lontana and Sorse tegnue are off the shore of Cavallino peninsula. The Malamocco and Venezia are off the shore of the Lido di Venezia island. The Chioggia tegnua is off the shore of Sottomarina peninsula, Chioggia.
The sizes of the tegnue can be very different, from a few to several thousands of square metres, with elevations from the bottom form a few tens of centimetres in the low formations, sometimes called "lastrure" (slab formations) and a few metres in the higher ones, which are often found at greater depths. There are three types of formations: