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Genetic Markers (SNPs) For Sex Identification

The sex ratio of the commercial fishery catch represents an extremely important source of uncertainty in the annual stock assessment (Stewart and Hicks, 2020). The IPHC has generated sex information of the entire set of aged commercial fishery samples on an annual basis since 2017 (>10,000 fin clips per year). Sex information is obtained using genetic techniques based on the identification of sex-specific single nucleotide polymorphisms (SNPs) (Drinan et al., 2018) using TaqMan qPCR assays conducted at the IPHC’s Biological Laboratory. Therefore, direct estimates of the sex-ratio at age for the directed commercial fishery are now available for stock assessment. Sex-ratio information of the commercial catch is likely to further inform selectivity parameters and cumulatively reduce uncertainty in future estimates of stock size, in addition to improving simulation of spawning biomass in the MSE Operating Model.


Drinan, D.P., Loher, T., and Hauser, L., 2018. Identification of Genomic Regions Associated With Sex in Pacific Halibut. Journal of Heredity 109, 326-332.

Stewart, I.J., and Hicks, A. 2020. Assessment of the Pacific halibut (Hippoglossus stenolepis) stock at the end of 2019. Int. Pac. Halibut Comm. Annual Meeting Report: IPHC-2020-SA-01.



In this Section

Migration and Population Dynamics

Generation of genomic resources

Gear modifications for bycatch reduction

Fishing technology

Discard survival assessment in the guided recreational Pacific halibut fishery

Discard survival assessment in the commercial Pacific halibut fishery

Economic Research

Management Strategy Evaluation

Stock Assessment

FISS – Catch Per Unit Effort

In this Section

Vessel Recruiting

Vessel Recruiting As an IPHC charter vessel operator, the annual Fishery-Independent

Design and Implementation

IPHC Fishery-Independent Setline Survey (FISS) The purpose of the FISS

Biological and Ecosystem Science Research

Since its inception, the IPHC has had a long history

Tag Recovery and Reward

A reward of a hat or $10 is offered for most recovered