Allometric variation and sexual dimorphism of the Okhotsk fringed sculpin Porocottus minutus (Cottidae) from the Taui Bay, Sea of Okhotsk

Authors

DOI:

https://doi.org/10.33910/2686-9519-2024-16-3-658-669

Keywords:

Porocottus minutus, the Sculpins, Sea of Okhotsk, allometric variability, sexual dimorphism

Abstract

The article is the first study of allometric variation and sexual dimorphism of the Okhotsk fringed sculpin Porocottus minutus (Cottidae) from the Taui Bay of the Sea of Okhotsk. The allometric nature of growth was revealed for 10 out of 19 studied traits. It has been established that most of the traits are subject to positive allometric variation. Negative allometry is observed in only one trait— the horizontal diameter of the eye. The traits whose index remains unchanged during the entire growth of the fish include the antedorsal distance and the length of the base of the anal fin. Females and males differ in two plastic traits — the length of the ventral and pectoral fins. The conducted study is the first to report the dependence of the number of antennae of the occipital and occipital lobules on the size of individuals.

References

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2024-09-16

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Vol. 16 No. 3 (2024)

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