A unique case of finding a large number of conjoined twins of juvenile pink salmon

During the fish feeding studies in the Obutanai River (Sakhalin, Nevelsk district) in the time of juvenile salmon migration in May 2021, the pink and chum juveniles were found in stomach of white-spotted char (weight 72.3, 55.7 and 73.9 g) in the number of 21, 35 and 51 specimens, respectively. Amon...

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Bibliographic Details
Main Authors: O. V. Zelennikov, D. V. Baginsky, V. P. Pogodin
Format: Article in Journal/Newspaper
Language:Russian
Published: Transactions of the Pacific Research Institute of Fisheries and Oceanography 2021
Subjects:
Online Access:https://doi.org/10.26428/1606-9919-2021-201-845-848
https://doaj.org/article/921d57ecdd134ddeaa8f8b67a2b2acb7
Description
Summary:During the fish feeding studies in the Obutanai River (Sakhalin, Nevelsk district) in the time of juvenile salmon migration in May 2021, the pink and chum juveniles were found in stomach of white-spotted char (weight 72.3, 55.7 and 73.9 g) in the number of 21, 35 and 51 specimens, respectively. Among them, there were 3, 4 and 8 pairs of conjoined twins of pink salmon, obviously preyed recently and practically at the same time. It can be assumed that the conjoined twins of pink salmon were presented on the feeding grounds of char in significant numbers and developed synchronously with ordinary juveniles, so they were able to join the downstream migration.