(1) In the course of ichthyological inventory investigations in the main water-course of the Narew River the occurrence of Tracheliastes polycolpus Nordm.
Ichthyology
Definition:
(n.) The natural history of fishes; that branch of zoology which relates to fishes, including their structure, classification, and habits.
Example Sentences:
(1) In the course of ichthyological inventory investigations in the main water-course of the Narew River the occurrence of Tracheliastes polycolpus Nordm.