Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Natural and Cultural Heritage of the Ohrid region' has mentioned 'Fish' in the following places:
Occurrence Sentence Text Source
Similar to Lake Baikal or Lake Tanganyika, Lake Ohrid harbors endemic species covering the whole food-chain, from phytoplankton and sessile algae (20 species; e.g., Cyclotella fottii), over plant species (2 species; e.g., Chara ohridana), zooplankton (5 species; e.g., Cyclops ochridanus), cyprinid fish (8 species; e.g., Pachychilon pictus), to predatory fish (two trout species; the Ohrid trout complex Salmo letnica, and "Belvica" Salmo ohridanus) and finally its diverse endemic bottom fauna (176 species; e.g.
[35] In total, seven introduced fish species are known from the lake.
Despite the exceptionally high level of endemism in Lake Ohrid (for example, a third of the 21 native fish species and almost 80% of its 72 mollusc species are endemic), a significant number of non-endemic species are found in Lake Ohrid.
Although the effects of these human impacts have not been evaluated in detail they are of great concern, as the shallow water sites are particularly rich in endemic bottom fauna and form important spawning grounds for several endemic fish species.
Commercial fish yield, i.e.
Nonetheless, even though thorough assessment of fish stocks has not been conducted since the 1990s[24] and trout populations are still believed to be in decline,[57] fishing with quotas was restarted in 2012 under the auspices of a concessionaire.
While most of the endemic fish species are non-migratory, the European eel spawns in the distant Sargasso Sea while its offspring return to the lake.
Its oligotrophic waters conserve over 200 species of plants and animals unique to the lake, including algae, turbellarian flatworms, snails, crustaceans and 17 endemic species of fish including two species of trout, as well as a rich birdlife.
Its oligotrophic waters contain over 200 endemic species with high levels of endemism for benthic species in particular, including algae, diatoms, turbellarian flatworms, snails, crustaceans and 17 endemic species of fish.
The Institute for Hydrobiology in Ohrid is responsible for the continuous monitoring of the Lake Ohrid ecosystem, the research and care for Lake Ohridxe2x80x99s flora and fauna, as well as the management of the fish hatchery, also to enrich the Lakexe2x80x99s fish stocks.