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FIG. 3 in Sex-Dependent Cold Tolerance at the Northern Invasive Range Limit of Gambusia affinis on Cape Cod, Massachusetts

FIG. 3. Lower (left) and upper (right) reported thermal tolerances for Gambusia affinis and Gambusia holbrooki. Each point and line represent the mean and range, respectively, for a particular population, with lethal and non-lethal assays distinguished. Significant variation in reported values for a given population is typically due to varied acclimation temperatures and separate testing on males and females. Gray lines show extrapolated 50% lower thermal tolerance predictions and standard errors for average males and females from our study. Letters indicate sexes included, and numbers refer to studies in Table S1 (see Data Accessibility).

FIG. 2 in Sex-Dependent Cold Tolerance at the Northern Invasive Range Limit of Gambusia affinis on Cape Cod, Massachusetts

FIG. 2. Estimated lower temperature of 50% loss of response to stimulus (LRT50) and 50% mortality (LT50) for male and female Gambusia affinis of various sizes from the Quashnet River, Massachusetts, USA. Thinner, lighter lines represent 6 one standard error. Note that estimates below 1.58C are extrapolations beyond the range of our data.

FIG. 1 in Sex-Dependent Cold Tolerance at the Northern Invasive Range Limit of Gambusia affinis on Cape Cod, Massachusetts

FIG. 1. Proportion of mosquitofish that responded to a stimulus and maintained orientation while experiencing progressively decreasing temperature. Points show average proportions for all females and males. Lines show model predictions: dark lines for fish of average mass; thin, light lines for fish at the 5% lower range of fish mass; and thick, light lines for fish at the 95% range of fish mass (calculated separately for each sex). Dashed lines show model extrapolation between 1.5 and 08C.

FIG. 4 in Sex-Dependent Cold Tolerance at the Northern Invasive Range Limit of Gambusia affinis on Cape Cod, Massachusetts

FIG. 4. Daily temperature ranges for Quashnet River surface water from three thermistors over four years. Data from Briggs et al. (2018). Lines and bars show mean 6 standard error 50% lower thermal response (LRT50) and lower thermal tolerance (LT50) predictions for average males and females from our study.

FIG. 6 in Predicting Eco-evolutionary Impacts of Fishing on Body Size and Trophic Role of Atlantic Cod

FIG. 6. Demography and adaptation are predicted to interact to shape the abundance, body size distribution, and trophic role of Atlantic Cod.

FIG. 5 in Predicting Eco-evolutionary Impacts of Fishing on Body Size and Trophic Role of Atlantic Cod

FIG. 5. (A) Change in mean trophic level and (B) the abundance of fish with trophic level greater than 5.5, relative to the unfished population, with size-selective fishing mortality in both scenarios. In both panels, black lines are demography only, gray lines are demography with adaptation.

FIG. 2 in Predicting Eco-evolutionary Impacts of Fishing on Body Size and Trophic Role of Atlantic Cod

FIG. 2. (A) Age distribution of mature females in the unfished population. (B) Age distribution of mature females after size-selective fishing mortality. Note that growth, maturation, and fecundity functions are fixed functions of age and do not change with additional mortality (solid lines, Fig. 1B, C). Inset: Fishery selectivity (risk of fishing mortality) increases steeply with length. (C) Age distribution of mature females when maturation age decreases in response to size-selective fishing (dashed lines, Fig. 1B, C). Selectivity is identical to the inset in panel B.

FIG. 1 in Predicting Eco-evolutionary Impacts of Fishing on Body Size and Trophic Role of Atlantic Cod

FIG. 1. Functions describing (A) somatic growth, (B) maturation, and (C) fecundity with age of our representative species, the Georges Bank stock of Atlantic Cod (GADUS MORHUA). A maturation ogive is the cumulative probability that an individual is mature. Black lines represent fixed relationships; dashed lines are plastic or evolutionary changes that occur with the advent of size-selective mortality. The decrease in size and age at maturation (dashed line, panel B) could be due to selection for earlier reproduction or due to lower relative size or density.

FIG. 3 in Predicting Eco-evolutionary Impacts of Fishing on Body Size and Trophic Role of Atlantic Cod

FIG. 3. Size structure of the three populations in Figure 2. (A) The unfished population, (B) size-structure after fishing if maturation probability does not change, (C) size-structure after fishing when maturation decreases as a response to size-selective mortality. In this example, fishing mortality FMAX ¼ 0.4.

FIG. 4 in Predicting Eco-evolutionary Impacts of Fishing on Body Size and Trophic Role of Atlantic Cod

FIG. 4. Distributions of trophic level in the three scenarios: unfished baseline (white), demography-only with fixed age at maturation (black) and demography-plus-trait-change, with plastic or evolutionary change in age at maturation (gray). Note that gray bars are always equal to or greater than black bars in height.

opencc-by-4.0Jun 2021View details →

Bait sets for Atlantic salmon, Atlantic cod and Tiger shark

Bait sets for Atlantic salmon, Atlantic cod and Tiger Shark, in FASTA file format. Each line string starting with ">" corresponds to the name of the contig/chromosome/linkage group where the bait sequence is designed from, followed by the base pairs where the bait sequence starts and ends. For salmon/cod, we include 20 extra sequences for the Random regions.

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Life‐stage‐dependent supergene haplotype frequencies and metapopulation neutral genetic patterns of Atlantic cod, Gadus morhua, from Canada's Northern cod stock region and adjacent areas

Among highly migratory fish species, nursery areas occupied by juveniles often differ from adult habitats. To better understand the spatial dynamics of Canada's Northern cod stock, juveniles caught off the east coast of Newfoundland and Labrador were compared to adults from the same region as well as individuals from other areas in Atlantic Canada using ddRAD-derived SNPs. A reduced proportion of homozygotes with a chromosomal inversion located in LG1 was detected between juvenile and adult samples in the Northern cod stock region, potentially indicating age-dependent habitat use or ontogenetic selection for attributes associated with the many genes located in LG1. No neutral genetic differences were found between samples from the Northern cod stock; however, significant differences were found between some of these samples and cod collected from St. Pierre Bank, Bay of Fundy, Browns Bank and the southern Scotian Shelf. Clustering analysis of variants at neutral loci provided evidence for three major genetic units: 1) the Newfoundland Atlantic Coast, 2) eastern and southern Gulf of St. Lawrence and Burgeo Bank, and 3) the Bay of Fundy, Browns Bank and southern Scotian Shelf. Both adaptive and neutral population structure within the Northern cod stock should be considered by managers to promote rebuilding.

opencc-zeroSep 2021View details →

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Nematode parasites of rockfish (Sebastes spp.) and cod (Gadus spp.) from waters near Kodiak Island Alaska, USA

Distribution and abundance of common parasitic nematodes in marine fishes is not well documented in many geographic regions. Understanding the influence of large-scale environmental changes on infection rates of fish by nematodes requires quantitative assessments of parasite abundance for multiple host species. We collected samples of two species of cod and eight species of rockfish (total of 232 specimens) from waters near Kodiak Island, Alaska, USA during Spring and Summer of 2015, and dissected and recorded all internal nematode parasites. We quantified the prevalence and intensity of nematode parasites in the ten host species, and tested for differences in prevalence among host species. We found three species of nematode: Anisakis simplex, sensu lato (Van Thiel), Pseudoterranova decipiens, sensu lato (Krabbe), and Hysterothylacium sp. (Ward and Magath). Eighty-two percent of the examined fish were infected with at least one parasitic nematode. The overall prevalence of P. decipiens, A. simplex, and Hysterothylacium sp. was 56%, 62%, and 2%, respectively. Anisakis simplex and P. decipiens were abundant and present in all ten species of host fish examined, whereas Hysterothylacium sp. was rare and found in only five of the host fish species. Prevalence and mean intensity of P. decipiens and A. simplex varied across the ten host species, and the number of parasites varied substantially among individual hosts within host species. The mean intensity of P. terranova and A. simplex in our study was substantially higher than the mean intensity for these same species from multiple other locations in a recent meta-analysis. This study provides a baseline of nematode parasite abundance in long-lived fish in waters near Kodiak Island, AK, and fills an important gap in our quantitative understanding of patterns of occurrence and abundance of these common and widespread parasites of marine fish.

opencc-zeroSep 2021View details →

opencc-by-4.0Nov 2022View details →

Data from: Mixed origin of juvenile cod (Gadus morhua) along the Swedish west coast

Cryptic population structure in exploited fishes poses a major challenge for fisheries management. In Atlantic cod, sympatric ecotypes are well-known, for instance off the coast of northern Norway. Recently, two sympatric cod ecotypes have also been documented in the Skagerrak and Kattegat, where adult cod has declined dramatically. One ecotype has an apparent offshore origin and displays a more migratory lifestyle than the other, which is generally resident at the coast throughout its life. To investigate their relative abundances along the Swedish west coast, juvenile cod were collected at a high spatial resolution along the coast, and genetically assigned to ecotype. The results reveal large proportions of the coastal ecotype in the southern Kattegat, Öresund, and in inshore Swedish Skagerrak, whereas the offshore ecotype dominates in offshore areas. Regression model comparison suggests that differences in bottom depth, rather than distance from the open sea, explains the heterogenous spatial distribution of the two ecotypes. In addition, the two ecotypes display genetic differences suggesting adaptation to different environments. The results underline that successful fisheries management requires identification and consideration of locally adapted sympatric ecotypes.

opencc-by-4.0Dec 2022View details →

Ground Truth for ÖNB, Cod. 3891

The Ground Truth was produced by the participants of the HTR Winter School 2022 in the Late Latin Group (more information: <a href="https://www.oeaw.ac.at/imafo/veranstaltungen/detail/introduction-into-handwritten-text-recognition">https://www.oeaw.ac.at/imafo/veranstaltungen/detail/introduction-into-handwritten-text-recognition</a>). The Ground Truth includes the following folios: 1-3r, 6-8, 11r, 27 and is still work in progress. We are adding more pages soon. If you find any errors we kindly ask you to contact Jan Odstrčilík (<a href="mailto:jan.odstrcilik@oeaw.ac.at">jan.odstrcilik@oeaw.ac.at</a>). The Supervisors of the Late Latin Group: Jan Odstrčilík PhD, Austrian Acadamy of Sciences, Daniela Mairhofer PhD, Princeton University, Tobias Hodel PhD, University of Bern.

opencc-by-4.0Aug 2023View details →

Raw EK80 echosounder data of polar cod collected by wideband autonomous transceiver in mesocosm AZKABAN 2023-01-19 and 24

Broadband active acoustic measurements using two echosounders (90-170 kHz and 185-255 kHz) of polar cod (Boreogadus saida) collected in Billefjorden in a mesocosm (2m x 2m x 8m). The experiment was completed from the wharf in Ny-Ålesund. The fileset includes measurements from the experiments of January 19 and 24, 2023 and includes CTD data. Calibration data is available <a href="https://doi.org/10.5281/zenodo.8289670">https://doi.org/10.5281/zenodo.8289670</a>