Morphological characteristics and variation of rudd Scardinius erytrophthalmus (L.) from the Łuknajno Lake, Poland.
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2010, Vol 3, Issue 2
Abstract
A total of 49 specimens of the rudd, Scardinius erytrophthalmus, were caught in the Łuknajno Lake, in 2005. For each fish, 24 morphometric features of the body and 20 features of the skull were measured. Selected meristic features (external and internal) were determined. Cephalic sensory canals were studied and their pores were counted. The coefficient of variation for the body proportion of rudd ranges from 3.88 to 31.55%. The meristic characters are as follows: D III 7–10, A III 10–14, P I 12–15, V I–II 8–9, l.l. 40–44, ss 6–8, i 3–4, Vt 38–41. The most common formula for the pharyngeal teeth is 3.5–5.3 (in 89.8% of the specimens), only in one specimen arrangement 2.5–5.2 was found. All the cephalic sensory canals are complete. The preoperculo-mandibular canal (CPM) has 12–24, commonly 19 pores. The supratemporal canal (CST) has 4–7, usually 6 pores. In the infraorbital canal (CIO) on the first infraorbital bone are 5–6 pores, commonly 5. The neurocranium of rudd is high and relatively wide. The smallest high of the neurocranium is noticed in the ethmoid region (13.47%) and the biggest in the supraoccipital.
Authors and Affiliations
Jolanta Szlachciak, Ewa Strakowska
Keywords
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