Neutral and adaptive population structure of pink abalone (Haliotis corrugata): fishery management implications

Abstract

The accurate definition of population units (stocks) and local adaptation are the cornerstones of fishery management. Unfortunately, this knowledge is unknown mainly for abalone species in the Northeast Pacific, where stocks have failed to recover. The pink abalone (Haliotis corrugata) is a fishing resource on the western coast of the Baja California Peninsula (BCP) and is currently catalogued as diminished with a recovery trending pattern. This research determined if the biological units matched the administrative and stock assessment units along the west coast of the BCP and the implications for fishery management. To test this hypothesis, a double digest restriction site-associated DNA sequencing approach was used to generate 1 733 neutral and 6 putative outlier loci for population genomic analysis. Neutral markers detected a smooth partition in two regional groups, the southern (San Juanico, La Bocana, Bahía Asunción, Puerto Escondido, Punta Eugenia, and Natividad Island) and northern regions (Cedros Island, Faro San José, San Jerónimo Island, and Guadalupe Island). Putative outlier loci indicated evident differentiation of those groups. The population subdivision at 28° latitude with both marker types was related to a biogeographic boundary. Results did not support the current administrative zones of pink abalone fisheries and contrasted with genetic homogeneity reports in the region.

Fisheries genomics of snapper (Chrysophrys auratus) along the west Australian coast

“…Interestingly, both boundaries are not marked by obvious physical barriers. This is a common finding in population genomic studies on marine species (Alberto Mares‐Mayagoitia et al, 2021; Deli et al, 2020; Portnoy et al, 2022; Silliman, 2019; Xuereb et al, 2018) and points to the complexity of evolutionary processes that maintain population structure. Although Gardner and Chaplin (2011) also detected the discontinuity in the southeast using microsatellite markers, our study is the first to report a stock boundary for snapper on the lower west coast.…”

European hake (Merluccius merluccius) stock structure in the Mediterranean as assessed by otolith shape and microchemistry

“…Many methods have been used for delineating stock boundaries, including genetic markers, tagging, life history, parasites, morphometry, demography, etc. ((Artetxe-Arrate et al, 2019;Mares-Mayagoitia et al, 2021;Reiss et al, 2009), and citations therein). Otolith features (mainly shape and trace elements) have also been used extensively (Kerr and Campana, 2014).…”

Fine‐scale environmentally associated spatial structure of lumpfish (Cyclopterus lumpus) across the Northwest Atlantic

“…In marine systems, high gene flow is often expected due to the lack of physical barriers and high egg and larval dispersal potential (Bradbury et al, 2008;Palumbi, 1994). However, examples of marine species which do not fit this paradigm and display evidence of regional scale neutral or adaptive genetic structure are accumulating (Bernatchez et al, 2017;Funk et al, 2012;Kess et al, 2020;Kess, Dempson, et al, 2021Luikart et al, 2003;Mares-Mayagoitia et al, 2021;Miller et al, 2019).…”

“…In marine systems, high gene flow is often expected due to the lack of physical barriers and high egg and larval dispersal potential (Bradbury et al, 2008 ; Palumbi, 1994 ). However, examples of marine species which do not fit this paradigm and display evidence of regional scale neutral or adaptive genetic structure are accumulating (Bernatchez et al, 2017 ; Funk et al, 2012 ; Kess et al, 2020 ; Kess, Dempson, et al, 2021 , Kess, Einfeldt, et al, 2021 ; Luikart et al, 2003 ; Mares‐Mayagoitia et al, 2021 ; Miller et al, 2019 ). Genomic studies across a range of marine taxa suggest regional diversity associated with variation in marine climate such as temperature extremes (e.g., Stanley et al, 2018 ) consistent with the presence of adaptive divergence within marine species (Hauser & Carvalho, 2008 ).…”