Nicholas C. Wegner
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View article: Relative sarcolipin (SLN) and sarcoplasmic reticulum Ca2+ ATPase (SERCA1) transcripts levels in closely related endothermic and ectothermic scombrid fishes: Implications for molecular basis of futile calcium cycle non-shivering thermogenesis (NST)
Relative sarcolipin (SLN) and sarcoplasmic reticulum Ca2+ ATPase (SERCA1) transcripts levels in closely related endothermic and ectothermic scombrid fishes: Implications for molecular basis of futile calcium cycle non-shivering thermogenesis (NST) Open
Regional endothermy is the ability of an animal to elevate the temperature of specific regions of the body above that of the surrounding environment and has evolved independently among several fish lineages. Sarcolipin (SLN) is a small tra…
View article: Observations of skin color aberrations in four shark species off the coast of southern California, USA
Observations of skin color aberrations in four shark species off the coast of southern California, USA Open
Skin color aberrations are naturally occurring abnormal pigment patterns that are generally rare among chondrichthyans. In this study, we highlight different skin color aberrations from observations of four shark species native to southern…
View article: Smaller body size under warming is not due to gill-oxygen limitation in a cold-water salmonid
Smaller body size under warming is not due to gill-oxygen limitation in a cold-water salmonid Open
Declining body size in fishes and other aquatic ectotherms associated with anthropogenic climate warming has significant implications for future fisheries yields, stock assessments and aquatic ecosystem stability. One proposed mechanism se…
View article: Organismal responses to deteriorating water quality during the historic 2020 red tide off Southern California
Organismal responses to deteriorating water quality during the historic 2020 red tide off Southern California Open
In April and May of 2020, a large phytoplankton bloom composed primarily of the dinoflagellate Lingulodinium polyedra reached historic levels in geographic expanse, duration, and density along the coast of southern California, United State…
View article: Paludiculture can support biodiversity conservation in rewetted fen peatlands
Paludiculture can support biodiversity conservation in rewetted fen peatlands Open
View article: The allometric scaling of oxygen supply and demand in the California horn shark, <i>Heterodontus francisci</i>
The allometric scaling of oxygen supply and demand in the California horn shark, <i>Heterodontus francisci</i> Open
The gill surface area of aquatic ectotherms is thought to be closely linked to the ontogenetic scaling of metabolic rate, a relationship that is often used to explain and predict ecological patterns across species. However, there are surpr…
View article: Gills, growth and activity across fishes
Gills, growth and activity across fishes Open
Life history theory suggests that maximum size and growth evolve to maximize fitness. In contrast, the Gill Oxygen Limitation Theory (GOLT) suggests that growth and maximum size in fishes and other aquatic, water‐breathing organisms is con…
View article: Revisiting a central prediction of the Gill Oxygen Limitation Theory: Gill area index and growth performance
Revisiting a central prediction of the Gill Oxygen Limitation Theory: Gill area index and growth performance Open
The Gill Oxygen Limitation Theory (GOLT) posits that a mismatch in oxygen supply and demand stemming from geometric constraints on gill surface area limits metabolic rate and energy available for biological processes. This theory has been …
View article: Laboratory‐based measures of temperature preference and metabolic thermal sensitivity provide insight into the habitat utilisation of juvenile <scp>California horn shark (</scp><i>Heterodontus francisci</i><scp>)</scp> and <scp>leopard shark (</scp><i>Triakis semifasciata</i><scp>)</scp>
Laboratory‐based measures of temperature preference and metabolic thermal sensitivity provide insight into the habitat utilisation of juvenile <span>California horn shark (</span><i>Heterodontus francisci</i><span>)</span> and <span>leopard shark (</span><i>Triakis semifasciata</i><span>)</span> Open
Laboratory‐based studies examining fish physiological and behavioural responses to temperature can provide important insight into species‐specific habitat preferences and utilisation, and are especially useful in examining vulnerable life …
View article: Gills, growth, and activity across fishes
Gills, growth, and activity across fishes Open
Life history theory argues that an organism’s maximum size and its corresponding growth rate have evolved to maximize lifetime reproductive output. The Gill Oxygen Limitation Theory suggests that in aquatic organisms, maximum size is inste…
View article: Temperature independence of haemoglobin–oxygen affinity in smalleye Pacific opah (<i>Lampris incognitus</i>) and swordfish (<i>Xiphias gladius</i>)
Temperature independence of haemoglobin–oxygen affinity in smalleye Pacific opah (<i>Lampris incognitus</i>) and swordfish (<i>Xiphias gladius</i>) Open
Smalleye Pacific opah and swordfish can conserve metabolic heat and maintain specific body regions warmer than ambient water temperature (i.e. regional heterothermy). Consequently, blood O2 uptake at the gills occurs at the environmental t…
View article: Spies in the Deep: Ocean Landers Explore the Deep Sea
Spies in the Deep: Ocean Landers Explore the Deep Sea Open
Below the surface layers of the ocean, there are ecosystems full of undiscovered life. Scientists love to ask questions like, “Who is there?” and “What are they doing?” An important question scientists are beginning to ask is, “How will th…
View article: Post-release survival and prolonged sublethal effects of capture and barotrauma on deep-dwelling rockfishes (genus <i>Sebastes</i>): implications for fish management and conservation
Post-release survival and prolonged sublethal effects of capture and barotrauma on deep-dwelling rockfishes (genus <i>Sebastes</i>): implications for fish management and conservation Open
Barotrauma—injury induced by changes in pressure—is a widespread challenge for successfully releasing fishes following capture. We used acoustic telemetry to examine the long-term post-release survival and behaviour of four rockfish specie…
View article: Analytical methods matter too: Establishing a framework for estimating maximum metabolic rate for fishes
Analytical methods matter too: Establishing a framework for estimating maximum metabolic rate for fishes Open
Advances in experimental design and equipment have simplified the collection of maximum metabolic rate (MMR) data for a more diverse array of water‐breathing animals. However, little attention has been given to the consequences of analytic…
View article: Respiratory capacity is twice as important as temperature in explaining patterns of metabolic rate across the vertebrate tree of life
Respiratory capacity is twice as important as temperature in explaining patterns of metabolic rate across the vertebrate tree of life Open
Oxygen supply from respiratory organs explains patterns of oxygen demand across the vertebrate tree of life.
View article: Fish Specialize Their Metabolic Performance to Maximize Bioenergetic Efficiency in Their Local Environment: Conspecific Comparison Between Two Stocks of Pacific Chub Mackerel (Scomber japonicus)
Fish Specialize Their Metabolic Performance to Maximize Bioenergetic Efficiency in Their Local Environment: Conspecific Comparison Between Two Stocks of Pacific Chub Mackerel (Scomber japonicus) Open
Species-specific ecological traits in fishes are likely to vary between populations or stocks due to differences in regional oceanic conditions, such as latitudinal temperature. We examined potential intraspecific differences in the swimmi…
View article: Characterizing deepwater oxygen variability and seafloor community responses using a novel autonomous lander
Characterizing deepwater oxygen variability and seafloor community responses using a novel autonomous lander Open
Studies on the impacts of climate change typically focus on changes to mean conditions. However, animals live in temporally variable environments that give rise to different exposure histories that can potentially affect their sensitivitie…
View article: Metabolic measurements and parameter estimations for bioenergetics modelling of Pacific Chub Mackerel <i>Scomber japonicus</i>
Metabolic measurements and parameter estimations for bioenergetics modelling of Pacific Chub Mackerel <i>Scomber japonicus</i> Open
As a crucial step in developing a bioenergetics model for Pacific Chub Mackerel Scomber japonicus (hereafter chub mackerel), parameters related to metabolism, the largest dissipation term in bioenergetics modelling, were estimated. Swimmin…
View article: Movement ecology of young-of-the-year blue sharks Prionace glauca and shortfin makos Isurus oxyrinchus within a putative binational nursery area
Movement ecology of young-of-the-year blue sharks Prionace glauca and shortfin makos Isurus oxyrinchus within a putative binational nursery area Open
Managing pelagic shark stocks requires information about the movement patterns and fisheries interactions of all age classes, including young-of-the-year (YOY; age-0), which, for many species, is particularly scant. This study investigated…
View article: Quantification of Cutaneous Ionocytes in Small Aquatic Organisms
Quantification of Cutaneous Ionocytes in Small Aquatic Organisms Open
Aquatic organisms have specialized cells called ionocytes that regulate the ionic composition, osmolarity, and acid/base status of internal fluids. In small aquatic organisms such as fishes in their early life stages, ionocytes are typical…