Article
Fisheries
Grace M. M. Hancock, Gorka Sancho, Stephan B. B. Munch, Santiago Salinas
Summary: Temperature-dependent sex determination occurs when the temperature affects gonad determination during development. Previous studies on TSD in fishes were mostly conducted under constant temperatures, but daily fluctuating temperatures can significantly impact fish physiology and life history. Therefore, we exposed Atlantic silverside, a TSD species, to different temperatures (28°C, 28°C±2°C, and 28°C±4°C) and quantified the sex ratios and length. The results showed that the percentage of females increased by 60%-70% under daily fluctuating temperatures (from 10% to 16% and 17%).
JOURNAL OF FISH BIOLOGY
(2023)
Article
Environmental Sciences
Sara J. Hutton, Samreen Siddiqui, Emily I. Pedersen, Christopher Y. Markgraf, Amelie Segarra, Michelle L. Hladik, Richard E. Connon, Susanne M. Brander
Summary: The study found that pyrethroids, commonly used insecticides, are frequently detected in aquatic environments and their toxicity differs in saltwater compared to freshwater. Inland Silversides, a model fish species, were exposed to six pyrethroids at different salinities, and even at the lowest concentration, behavioral changes were induced at all salinities. Toxicity decreased as salinity increased for all pyrethroids except permethrin, and the relationship between log K-OW and thigmotaxis was altered between low and high salinities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Fisheries
Seishi Kimura, Kosuke Takeda, Ryo Ono Gotoh, Naoto Hanzawa
Summary: A new atherinid fish species, Doboatherina palauensis, is described based on morphological characteristics such as the structure of the premaxilla, eye size, number of midlateral scales, and total vertebrae, which distinguish it from other congeners.
ICHTHYOLOGICAL RESEARCH
(2021)
Article
Oceanography
Jeomshik Hwang, Jurek Blusztajn, Liviu Giosan, Minkyoung Kim, Steven J. Manganini, Daniel Montlucon, John M. Toole, Timothy I. Eglinton
Summary: The study focused on the neodymium isotopic composition of detrital fractions in surface sediments and sinking particles to understand transport trajectories associated with hemipelagic sedimentation on the northwest Atlantic margin. Results showed significant differences in sediment provenance across the margin, with material primarily transported in intermediate nepheloid layers and influenced by bottom nepheloid layers and the Deep Western Boundary Current.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Engineering, Environmental
John Driscoll, Kai M. A. Chan
Summary: This study highlights the neglect of nutrient information in traditional fisheries science and management, leading to a lack of understanding of nutrient yields and their changes in exploited fish species. By applying nutrient-informed analysis, the researchers find that nutrient yields show more variation over time and are concentrated in fewer taxa in northwest Atlantic fisheries. Minor species in terms of weight are identified as key sources of specific nutrients, with Atlantic herring being a cornerstone of regional nutrient yields.
Article
Microbiology
Maria A. Soto, Dhwani Desai, Catherine Bannon, Julie LaRoche, Erin M. Bertrand
Summary: This study identified potential cobalamin sources and sinks on the Scotian Shelf and Slope in the Northwest Atlantic Ocean through functional and taxonomic annotation of bulk metagenomic reads and analysis of genome bins. Cobalamin synthesis was primarily attributed to Rhodobacteraceae, Thaumarchaeota, and cyanobacteria, while cobalamin remodelling was mainly attributed to Alteromonadales, Pseudomonadales, Rhizobiales, Oceanospirilalles, Rhodobacteraceae, and Verrucomicrobia. Potential cobalamin consumers include Flavobacteriaceae, Actinobacteria, Porticoccaceae, Methylophiliaceae, and Thermoplasmatota.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Fisheries
Callie A. Concannon, Emma L. Cross, Lucas F. Jones, Christopher S. Murray, Catherine M. Matassa, Richard S. McBride, Hannes Baumann
Summary: Experiments on the Atlantic silverside fish model have shown that predicted future high CO2 levels have significant impacts on reproductive traits, with decreases in reproductive investment and fecundity under high CO2 exposure at different temperature conditions. This highlights the need for further investigation into the reproductive impacts of increasing CO2 levels on various fish species with different life history strategies.
ICES JOURNAL OF MARINE SCIENCE
(2021)
Article
Biodiversity Conservation
Michael Hesemann
Summary: This study documents the species diversity of benthic foraminifera in four abyssal working areas in the Labrador Sea, Labrador Basin, and Southwest of the Azores. A total of 150 taxa were recorded, with 124 taxa illustrated and described. The analysis was based on samples collected during the RV Sonne cruise SO286, and the results suggest the presence of four species-based clusters, indicating the heterogeneity of abyssal faunas.
Article
Environmental Sciences
Ingrid L. Pollet, Laura McFarlane-Tranquilla, Neil M. Burgess, Antony W. Diamond, Carina Gjerdrum, April Hedd, Rielle Hoeg, Patricia L. Jones, Robert A. Mauck, William A. Montevecchi, Isabeau Pratte, Robert A. Ronconi, Dave Shutler, Sabina I. Wilhelm, Mark L. Mallory
Summary: This study investigated mercury exposure in Leach's storm-petrels, a pelagic seabird species, by analyzing egg and blood samples. The results showed that mercury concentrations increased with colony latitude, with higher concentrations in blood than in eggs. Mercury concentrations in blood were associated with low toxicity risk in birds from southern colonies and moderate risks in birds from northern colonies. The study also found that mercury concentrations were correlated with delta 34S, indicating the role of sulfate-reducing bacteria in methylation of mercury acquired through marine food webs. Additionally, blood mercury levels were higher when storm-petrels searched for food over deeper waters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Fisheries
Yuan Yan, Eva Cantoni, Chris Field, Margaret Treble, Hugues P. Benoit, Rick M. Rideout, Joanna Mills Flemming
Summary: Modelling life history trait variation at appropriate spatial and temporal scales is crucial for understanding population dynamics and developing effective fisheries management strategies. In this study, we developed spatiotemporal maturation models for Greenland halibut in the Northwest Atlantic and found a decreasing temporal trend in size at maturity across the entire area. The study also identified important areas for reproductive development and revealed the association between fish length and bottom depth.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Environmental Sciences
Sebastien P. Bigorre, Albert J. Plueddemann
Summary: This article analyzes 11 years of near-surface meteorology using observations from an open-ocean surface mooring in the Northwestern Tropical Atlantic. It compares in situ data with three reanalyses and finds discrepancies in longwave and shortwave radiation fluxes, with some reanalyses showing significant bias.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Neil Fuller, Kara E. Huff Hartz, Nadhirah Johanif, Jason T. Magnuson, Eleni K. Robinson, Corie A. Fulton, Helen C. Poynton, Richard E. Connon, Michael J. Lydy
Summary: This study identified the potential for trophic transfer of chlorpyrifos from OP-resistant Hyalella azteca to the predator Menidia beryllina, and found that elevated temperatures may exacerbate the neurotoxic effects of chlorpyrifos.
ENVIRONMENTAL POLLUTION
(2021)
Article
Evolutionary Biology
Anna Tigano, Arne Jacobs, Aryn P. Wilder, Ankita Nand, Ye Zhan, Job Dekker, Nina Overgaard Therkildsen, Kirk Lohmueller
Summary: The levels and distribution of genetic variation in a genome can shed light on adaptation potential, demographic history, and genome structure. The Atlantic silverside genome exhibits extreme levels of diversity and structural variation, likely contributing to its remarkable adaptive divergence among populations.
GENOME BIOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
Afonso Goncalves Neto, Joseph A. Langan, Jaime B. Palter
Summary: Research indicates a northward shift of the Gulf Stream towards the Tail of the Grand Banks on the Northwest Atlantic Shelf in 2008, disrupting the connectivity of the Labrador Current and potentially contributing to abrupt warming and an ecosystem shift a year later. Historical observations suggest similar events may have occurred in the 1970s.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Oceanography
Shangfei Lin, Jinyu Sheng, Kyoko Ohashi, Qingtao Song
Summary: This study investigates the interactions between surface waves and ocean currents over the northwest Atlantic during Hurricanes Earl and Igor in 2010 using a coupled wave-circulation model and observational data. The results show that the coupled model improves the simulation of surface waves, sea level, water temperature, and salinity, with a reduction in significant wave heights along storm tracks and over eddies by considering wave-current interactions (WCIs). The study also found that surface waves modulate tidal amplitudes and currents in the Gulf of Maine, and influence storm surge during hurricanes through wave-induced forces.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
