[Phenotypic variability of a perch parasite-cestode proteocephalus percae (Müller, 1780) (Proteocephalidea) in different parts of the species range].
Discrete variability of four P. percae characters of the main cestode functional complexes was identified. Phenotypic diversity of P. percae from different parts of the distribution range was analysed. Research revealed low geographic variability and high stability of the dominant variations in combination with morphometric plasticity. The conclusion was made that the patterns of P. percae morphological variability were shaped by the common fate and long-standing co-evolutionary relations between the parasite and the host--the perch Perca fluviatilis.
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D000818:Animals; D005075:Biological Evolution; D002589:Cestoda / Q000033:anatomy & histology / Q000502:physiology*; D006790:Host-Parasite Interactions / Q000502:physiology; D010471:Perches / Q000469:parasitology*