Eleanor A S Adamson

Fishmongers' Company

Contributions and services of the Pacific oyster to the UK's marine environment and coastal economy.

The taxonomic status of the large snakeheads of the Channa marulius group that occur in Sri Lanka is reviewed and clarified. Two species are recognized from the island, based on both morphological and molecular (cytochrome c oxidase subunit 1: cox1) differentiation: C. marulius Hamilton from the northern dry zone and C. ara Deraniyagala from the mi...

Channa auroflammea is a new freshwater fish species of the Marulius group from the Mekong River system. Previously reported as C. marulius, C. cf. marulius, or C. aff. marulius, C. auroflammea is readily distinguished from C. marulius and other members of the Marulius group by a different colour pattern, and a DNA barcode sequence at least 6.5% div...

The "bullseye" or "cobra" snakehead is a large, predatory freshwater fish of South Asian origin. Until recently, only one bullseye species has been recognised, Channa marulius, but new studies on the 'Marulius group' have revealed that there are at least four species with different native ranges in rivers of mainland South Asia, as well as Channa m...

Channa aurolineata is a valid species of the Marulius group. Previously treated as a synonym of C. marulius, C. aurolineata is readily distinguished from C. marulius by a different colour pattern, in which a conspicuous white posterior margin is present on the black scales that form the dark lateral blotches in larger juveniles and adults (vs. scal...

Management of wild fisheries resources requires accurate knowledge on which species are being routinely exploited, but it can be hard to identify fishes to species level, especially in speciose fish groups where colour patterns vary with age. Snappers of the genus Lutjanus represent one such group, where fishes can be hard to identify and as a resu...

Species composition of specimens obtained. (DOC)

Morphological data for LL1 and LL2. (DOC)

Members of the freshwater halfbeak genus Dermogenys are hard to identify to the species level, despite several previous attempts to isolate fixed meristic, morphometric and colour pattern differences. This has led to ongoing confusion in scientific literature, records of species occurrence, and entries in museum collections. Here, a DNA barcoding s...

Does the UK need a new non-mussel shellfish hatchery? This report details a survey of oyster growers and oyster hatcheries in the UK. Although it is widely believed that the UK would benefit from increased capacity to produce shellfish seed, we found no evidence that there was a shortage of seed now, or increasing demand from existing growers in th...

An investigation integrating morphological and molecular data to address the taxonomic status of Indian Channa marulius-like fishes reveals the presence of two species within Indian Rivers. As a consequence, Channa pseudomarulius is resurrected as a valid species and removed from the synonymy of C. marulius. Channa pseudomarulius appears to be rest...

The Seychelles archipelago is unique among isolated oceanic islands because it features an endemic radiation of caecilian amphibians (Gymnophiona). In order to develop population genetics resources for this system, we identified microsatellite loci using unassembled Illumina MiSeq data generated from a genomic library of Grandisonia alternans, a sp...

As researchers have gained a greater understanding of the contribution that population genetic processes have in shaping and maintaining natural populations, molecular genetic techniques have become more prevalent as a tool for ecological fisheries research. This chapter aims to provide a basic summary of population genetic theory and to illustrate...

1. The phylogeography of freshwater taxa is often integrally linked with landscape changes such as drainage re‐alignments that may present the only avenue for historical dispersal for these taxa. Classical models of gene flow do not account for landscape changes and so are of little use in predicting phylogeography in geologically young freshwater...

This study used a portion of the mitochondrial cytochrome b gene to investigate the phylogenetic relationships of Suncus pygmy shrews and to help clarify the taxonomic status of the Malayan pygmy shrew (S. malayanus) and the Malagasy pygmy shrew (S. madagascariensis). Phylogenetic reconstructionswere performed using neighbour-joining and Bayesian a...

Freshwater snakehead fishes (Channidae) provide an interesting target for phylogenetic analysis for the following reasons, their unusual biology, potential for cryptic diversity and availability of a good fossil record. Here, a multi-locus molecular phylogeny was constructed and calibrated using two fossil dates to estimate divergence times within...

A molecular approach was employed to investigate stock structure in Siamese mud carp Henicorhynchus siamensis populations collected from 14 sites across mainland south-east Asia, with the major focus being the lower Mekong River basin. Spatial analysis of a mitochondrial DNA fragment (ATPase 6 and 8) identified four stocks in the Mekong River basin...

Abstract –  For effective management of a freshwater species, it is necessary to have an understanding of the spatial scale of population differentiation. In many cases, common ecological methods such as mark-recapture are inappropriate for large freshwater systems. In this study, a molecular genetics approach was employed to determine the populati...

A primary concern in wild fi sheries is the identifi cation of stocks for management. Many freshwater fi sh species exist as discrete populations where a lack of gene fl ow among local populations results in ecological and/or genetic differentiation due to the effects of random genetic drift and for adaptation to local environments. Successful sust...