Deirdre Brophy
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View article: Population Genomics and Connectivity of the Blue Mussel Species Complex: Insights From a North‐East Atlantic Hybrid Zone
Population Genomics and Connectivity of the Blue Mussel Species Complex: Insights From a North‐East Atlantic Hybrid Zone Open
Blue mussels ( Mytilus spp.) are ecologically and economically important bivalves widespread in both hemispheres. Their relevance to coastal ecosystems and the aquaculture industry has made them extensively studied. The Mytilus complex con…
View article: Otolith oxygen isotope profiles as potential indicators of large-scale migrations in Atlantic bluefin tuna (Thunnus thynnus)
Otolith oxygen isotope profiles as potential indicators of large-scale migrations in Atlantic bluefin tuna (Thunnus thynnus) Open
Atlantic bluefin tuna (Thunnus thynnus) undertake extensive and dynamic oceanic migrations. This study investigated if secondary ion mass spectrometry (SIMS) measurements of oxygen stable isotopes (δ18O) in otoliths may be useful for infer…
View article: Gap analysis and review of survey effort disruption in North Sea and North-eastern Atlantic bottom trawl surveys
Gap analysis and review of survey effort disruption in North Sea and North-eastern Atlantic bottom trawl surveys Open
Fisheries-independent surveys are essential to stock assessment, providing estimates on relative abundance, distribution, and biology of commercially fished species. Environmental, mechanical, and logistical issues can disrupt survey opera…
View article: Salmon Data Mobilization
Salmon Data Mobilization Open
Despite substantial research and conservation efforts, many salmon populations are in decline. Globally, salmon research is not delivering effective decision support products to help managers apply research insights as informed management …
View article: Single-species quotas drive discards by multi-species trawlers in the Celtic Seas ecoregion when their relative abundance fluctuates
Single-species quotas drive discards by multi-species trawlers in the Celtic Seas ecoregion when their relative abundance fluctuates Open
Our study investigated discarding patterns by bottom otter trawlers over 17 years prior to the full implementation of the Landing Obligation. A generalized additive modelling approach was applied to at-sea sampling data to examine the most…
View article: Examining fish scale biomineral from Atlantic salmon populations
Examining fish scale biomineral from Atlantic salmon populations Open
Fish scale microchemistry can be used to make life‐history inferences, although ecological studies examining scale composition are relatively rare. Salmon scales have an external layer of calcium phosphate hydroxyl apatite (HAP). The struc…
View article: Do fish gut microbiotas vary across spatial scales? A case study of Diplodus vulgaris in the Mediterranean Sea
Do fish gut microbiotas vary across spatial scales? A case study of Diplodus vulgaris in the Mediterranean Sea Open
Background Biogeography has been linked to differences in gut microbiota in several animals. However, the existence of such a relationship in fish is not clear yet. So far, it seems to depend on the fish species studied. However, most stud…
View article: Cortisol in fish scales remains stable during extended periods of storage
Cortisol in fish scales remains stable during extended periods of storage Open
Measurement of cortisol in fish scales is attracting considerable attention as a non-invasive indicator of chronic stress in wild populations. For many fish species of management and conservation interest, extensive scale collections exist…
View article: Geographic origin and host’s phylogeny are predictors of the gut mucosal microbiota diversity and composition in Mediterranean scorpionfishes (Scorpaena spp.)
Geographic origin and host’s phylogeny are predictors of the gut mucosal microbiota diversity and composition in Mediterranean scorpionfishes (Scorpaena spp.) Open
The gut microbiome holds an important role in the health and homeostasis of fishes. However, despite the large diversity and distribution of this vertebrate group, only the intestinal microbiome of a limited number of freshwater and marine…
View article: Salmon Data Mobilization
Salmon Data Mobilization Open
Despite substantial research and conservation efforts, many salmon populations are in decline. Globally, salmon research is not delivering effective decision support products to help managers apply research insights as informed management …
View article: Partitioning survival during early marine migration of wild and hatchery-reared Atlantic salmon (Salmo salar L.) smolts using acoustic telemetry
Partitioning survival during early marine migration of wild and hatchery-reared Atlantic salmon (Salmo salar L.) smolts using acoustic telemetry Open
The marine migration of Atlantic salmon ( Salmo salar ) has been prioritised for research internationally as populations of S. salar have declined significantly throughout the species’ range. The main objectives of this study were to use a…
View article: Unidirectional <scp>trans‐Atlantic</scp> gene flow and a mixed spawning area shape the genetic connectivity of Atlantic bluefin tuna
Unidirectional <span>trans‐Atlantic</span> gene flow and a mixed spawning area shape the genetic connectivity of Atlantic bluefin tuna Open
The commercially important Atlantic bluefin tuna ( Thunnus thynnus ), a large migratory fish, has experienced notable recovery aided by accurate resource assessment and effective fisheries management efforts. Traditionally, this species ha…
View article: Effects of temperature and feeding regime on cortisol concentrations in scales of Atlantic salmon post-smolts
Effects of temperature and feeding regime on cortisol concentrations in scales of Atlantic salmon post-smolts Open
Anadromous fish are vulnerable to anthropogenic and environmental stressors including pollution, rising temperatures, and changes in food availability. Knowledge of how fish respond to specific stressors aid our understanding of population…
View article: Stochastic modelling and synthesis of dynamic fish recruitment productivity in the Celtic Seas ecoregion
Stochastic modelling and synthesis of dynamic fish recruitment productivity in the Celtic Seas ecoregion Open
The Celtic Seas ecoregion (CSE) is undergoing climatic and ecosystem changes, which can induce changes in fish productivity. Globally, the productivity of many stocks has shown evidence of change over decadal timescales. Varying factors mi…
View article: Geographic origin and host’s phylogeny are predictors of the gut mucosal microbiota diversity and composition in Mediterranean scorpionfishes (Scorpaena sp.)
Geographic origin and host’s phylogeny are predictors of the gut mucosal microbiota diversity and composition in Mediterranean scorpionfishes (Scorpaena sp.) Open
Background The gut microbiome holds an important role in the health and homeostasis of fishes. However, despite the large diversity and distribution of this vertebrate group, only the intestinal microbiome of a limited number of freshwater…
View article: Recent marine growth declines in wild and ranched Atlantic salmon<i>Salmo salar</i>from a western European catchment discovered using a 62-year time series
Recent marine growth declines in wild and ranched Atlantic salmon<i>Salmo salar</i>from a western European catchment discovered using a 62-year time series Open
To address population declines, many salmon populations are supplemented with hatchery-bred fish. Little is known about how growth performance of hatchery-bred and wild salmon compare during critical periods such as the first summer at sea…
View article: Unidirectional trans-Atlantic gene flow and a mixed spawning area shape the genetic connectivity of Atlantic bluefin tuna
Unidirectional trans-Atlantic gene flow and a mixed spawning area shape the genetic connectivity of Atlantic bluefin tuna Open
The commercially important Atlantic bluefin tuna (Thunnus thynnus), a large migratory fish, has experienced notable recovery aided by accurate resource assessment and effective fisheries management efforts. Traditionally, this species has …
View article: Numbers or mass? Comparison of two theoretically different stage-based stock assessment models and their ability to model simulated and real-life stocks
Numbers or mass? Comparison of two theoretically different stage-based stock assessment models and their ability to model simulated and real-life stocks Open
Stage-based assessment models are a type of fisheries stock assessment model that offer an alternative middle ground between aggregate and compositional models. We compare the capabilities of two theoretically different stage-based assessm…
View article: Peterman's productivity method for estimating dynamic reference points in changing ecosystems
Peterman's productivity method for estimating dynamic reference points in changing ecosystems Open
Target and limit reference points are fundamental management components used to define sustainable harvest strategies. Maximum Sustainable Yield (MSY) and the precautionary principle underpin many reference points. Non-proxy reference poin…
View article: Evidence of a range expansion in sunfish from 47 years of coastal sightings
Evidence of a range expansion in sunfish from 47 years of coastal sightings Open
Almost nothing is known about the historical abundance of the ocean sunfish. Yet as an ecologically and functionally important taxa, understanding changes in abundance may be a useful indicator of how our seas are responding to anthropogen…
View article: Investigating post-depositional alteration of trace elements in fish scales using tagged and recaptured wild salmon
Investigating post-depositional alteration of trace elements in fish scales using tagged and recaptured wild salmon Open
Non-invasive methods are needed to enable indirect observation of vulnerable migratory fish populations across their life cycle and spatial distribution. Microchemistry data, such as trace element (TE) concentrations, collected non-invasiv…
View article: Elemental composition of illicia and otoliths and their potential application to age validation in white anglerfish (Lophius piscatorius linnaeus, 1758)
Elemental composition of illicia and otoliths and their potential application to age validation in white anglerfish (Lophius piscatorius linnaeus, 1758) Open
Seasonal variation in the incorporation of trace elements into the calcified structures of fish can produce intra annual variation in the microchemistry of those structures. Interpretation of these seasonal signals can provide information …
View article: Moving reference point goalposts and implications for fisheries sustainability
Moving reference point goalposts and implications for fisheries sustainability Open
For many environmental indicators, the sustainable status can change because of changes in either the monitored state or the policy goal. Fisheries provide an intensively monitored setting to investigate the relative impacts of such change…
View article: Long-term trends in herring growth primarily linked to temperature by gradient boosting regression trees
Long-term trends in herring growth primarily linked to temperature by gradient boosting regression trees Open
Environmental change and fishing activity can produce directional trends in exploited fish populations with consequences for stock productivity. For herring in the Celtic Sea, size at age has been in steady decline since the mid 1980's. In…