North Pacific Anadromous Fish Commission

Technical Report 15

Table of Contents

Temporal Forms of Pink Salmon in Sakhalin-Kuril Region and their Abundance Dynamics

Authors:
Alexander M. Kaev

Abstract Excerpt:
At the present time, we have accumulated lots of data on the occurrence of different pink salmon groupings that have different timing of runs in the same rivers. First, such groupings were noticed in rivers of the southeastern coast of Alaska and British Columbia along the American coast (Royce 1962; Vernon 1962) and in rivers of Iturup Island and southeastern coast of Sakhalin Island along the Asian coast of North Pacific (Ivankov 1967; Volovik et al. 1972). According to modern views, distribution of temporal forms of pink salmon over the reproduction area is rather wider than that suggested not long ago (Ivankov 2011). Fishes from these groupings differ in body size, fecundity, gonads maturity during spawning escapement, timing of migration, and spawning areas. Whilst earlier they were considered the same species, currently some scientists suggest giving them a rank of ecological subspecies (Ivankov and Ivankova 2017). However, there is no point in discussing such nuances until obtaining reliable genetic investigation results, because in these groupings we can observe a wide overlap with both the time of their entering the rivers and the spawning areas (Kaev 2012). At the same time, the notions about such temporal groupings continue to remain at the level of acceptance that these groupings are expedient for a fuller colonization of a habitat area by pink salmon (Ivankov 2011; Ivankov and Ivankova 2013, 2017). In this paper, we consider peculiar features of abundance dynamics for such groupings, which we name so far as the temporal forms.

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DOI:
https://doi.org/10.23849/npafctr15/19.22.

Citation

Kaev, A.M.  2019.  Temporal forms of pink salmon in Sakhalin-Kuril region and their abundance dynamics.  N. Pac. Anadr. Fish Comm. Tech. Rep. 15: 19–22.  https://doi.org/10.23849/npafctr15/19.22.