Hola,
These elements are not from pikeperch. Picture 1 and 2 is a branchiospine from a perciform, I guess from a perch (Perca fluviatilis). Picture 3 and 4 is a dentary from a gadiform, likely a five-bearded rockling (Ciliata mustela). The dentary has acrodont teeth, similar sized and in three to four rows. The rockling is marine occurring beneath low tide. Is the otter scat from a costal locality? I have not checked the branchiospine against marine perciforms. Pikeperch does not have these long slender branchiospinae on the first gill arch.
When you prepare comparative skeletons make sure that you collect the branchial spines, not just the larger branchial arch elements. Branchiospinae are often diagnostic to genus level, and even to species.
Best wishes
Leif Jonsson/ Gothenburg, Sweden
########################################################################
To unsubscribe from the ZOOARCH list, click the following link:
https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=ZOOARCH&A=1
|