Tracing the origin of fish without hatchery information: genetic management of stock enhancement for mangrove red snapper (Lutjanus argentimaculatus) in Taiwan

Abstract

Stock enhancement is considered to be a valuable approach for restoring fishery resources. Because no specific official institution in Taiwan is responsible for the production of fry, the released fry are purchased directly from the private sector. However, fishermen from the private industry have not established a genetic background, so the genetic composition for each batch of released fry is unclear. Mangrove red snapper (Lutjanus argentimaculatus), a prominent species released in Taiwan, was collected after its official release. One hundred and two field samples were compared with four batches of hatchery fry (n = 685) by using a microsatellite-based multiplex PCR assay. Four of the field samples (3.9%; 4/102) were revealed to be from a fish farm and most likely from a single batch. This study revealed that wild mangrove red snappers are genetically different from those originating from farms, and their origins can be traced through molecular markers, even without information on breeding stocks.

A Review of Marking and Tagging Methods for Blue Catfish, Channel Catfish, and Flathead Catfish

“…Use of OTC marking in catfish is not common, perhaps because there are alternative, better understood methods available to evaluate stockings (e.g., fin clips) and due to concerns about mortality associated with photosensitivity (Stewart and Long 2011). Technology associated with genetic marking is rapidly improving and introduces novel tools to evaluate fish populations (Campbell et al 2019;Bunch et al 2020;Hsu et al 2020). For example, examination of effective population size (Luikart et al 2010;Gossieaux et al 2019), parentage assignment of stocked fish (Waldbieser and Bosworth 2013), selective breeding in aquaculture (Bosworth et al 2020), and even genomic editing (Elaswad et al 2018;Patiño 2019) are all possible using genetic markers.…”

Hatchery release programme modified the genetic diversity and population structure of wild Chinese sucker (Myxocyprinus asiaticus) in the upper Yangtze River

“…There are 52 power stations generating more than 1 million kilowatts, and 107 power stations generating more than 300,000 kilowatts, as well as many medium and small hydropower stations that have been built or are under construction (He et al, 2011;Chu, Liu & Pan, 2019). Its plastic tags, otolith marking (Saito et al, 2020), coded wires (Simon & Wickström, 2020), fluorescent elastomer tags, visible alphanumeric plastic tags or passive integrated transponders (Hanson et al, 2020), as well as heritable genetic marks such as mitochondrial DNA, minisatellites, microsatellites, transcribed sequences, anonymous cDNA or random amplified polymorphic DNAs (Gharrett et al, 2001;Hsu et al, 2020) before release should be seriously considered. It is better to identify the hatchery of origin for fish captured in the wild during the monitoring programme, hence the suggestion of 'familyprinting' for released M. asiaticus (Letcher & King, 1999).…”

Utilizing ISSRseq genotyping to assist growth selection in tomato grouper (Cephalopholis sonnerati) without broodstock information

“…Molecular markers are DNA segments associated with specific genes or traits, enabling researchers to identify and select individuals with desirable characteristics and differentiate between various families, populations, and species (Hsu et al, 2011; Hsu & Gwo, 2017; Hsu, Huang, Lee, et al, 2020; Hsu, Huang, Lin, et al, 2020). They are now widely used in fisheries and aquaculture research (Hsu et al, 2022; Wong et al, 2022; You et al, 2020).…”