Ontogenetic patterns in juvenile blue crab density: effects of habitat and turbidity in a Chesapeake Bay tributary DOI Creative Commons
A. Challen Hyman, Grace S. Chiu,

MS Seebo

et al.

Marine Ecology Progress Series, Journal Year: 2023, Volume and Issue: 729, P. 135 - 150

Published: Nov. 30, 2023

Nursery habitats are characterized by favorable conditions for juveniles, including higher food availability and lower predation risk, disproportionately contribute more individuals per unit area to adult populations compared other habitats. However, nursery habitat inference is complicated changes in preferences with ontogeny; early-life stages frequently inhabit different than older juveniles or adults. In this field experiment, we modeled the density of 4 size classes juvenile blue crabs Callinectes sapidus based on carapace width (CW) across multiple at various locations within an estuarine seascape during crab recruitment season. We examined types—unstructured sand, seagrass meadows, salt marsh edges (SME), shallow detrital (SDH). Results indicated that densities small (≤10 mm CW) were highest seagrass, whereas larger (16-25 SME. Although declined as a function size, SME remained consistently high, suggesting secondary dispersal smaller after settlement may supplement losses due mortality. Turbidity was positively correlated both classes, although our model did not address whether top-down (refuge) bottom-up (food availability) mechanisms. Observed patterns size-specific utilization result from changing requirements animals minimize mortality-to-growth ratios. Our findings emphasize role ontogeny significance structurally complex supporting sizes previously recognized, challenging past notions about singular importance system. also underscore need quantify preserve complete chain used juveniles.

Language: Английский

Impacts of Marine Heatwaves on Subsurface Temperatures and Dissolved Oxygen in the Chesapeake Bay DOI Creative Commons
Nathan P. Shunk, Piero L. F. Mazzini, Ryan Walter

et al.

Journal of Geophysical Research Oceans, Journal Year: 2024, Volume and Issue: 129(3)

Published: Feb. 26, 2024

Abstract Subsurface impacts associated with Marine Heatwaves (MHWs) in estuaries are not well understood, largely due to data scarcity. Using over three decades (1986–2021) of observations from several monitoring programs, this study investigates subsurface temperature and dissolved oxygen (DO) anomalies surface MHWs the Chesapeake Bay (CB). Seasonal variability followed a simple 1‐D response heating downward heat transport diffusion controlled by seasonally variable stratification mixing. Two distinct regimes were found: thermally stratified spring‐summer regime, when positive confined mixed layer (SML); homogeneous fall‐winter regime. Additionally, (subsurface) temperatures elevated for months (days weeks) before after MHWs, indicating individual events shorter than timescales temperatures. A SML budget identified air‐estuary flux changes as leading driver MHW onsets declines, latent being dominant term. DO anomaly patterns more complex, considerable along‐channel gradients. Notable decreases (1–4 mg L −1 ) primarily occurred winter/spring below SML, hypoxic zone expanded spring through fall. Only small fraction these could be attributed temperature‐induced solubility changes, demonstrating that other physical and/or biogeochemical processes dominate during events. In CB, concurrent low persistent high compound on valuable ecosystem, event likely exacerbated climate change.

Language: Английский

Citations

8
Reproductive Biology of the Invasive Blue Crab Callinectes Sapidus (Rathbun, 1896) on the African Atlantic Coast DOI
Mohamed Selfati, Ibtissam Doukilo,

Abdelmoghit Erbib

et al.

Estuaries and Coasts, Journal Year: 2025, Volume and Issue: 48(2)

Published: Jan. 12, 2025

Language: Английский

Citations

0
Spatio-Temporal Distribution of Four Trophically Dependent Fishery Species in the Northern China Seas Under Climate Change DOI Creative Commons
Jun Li Ren, Qun Liu, Yudao Ma

et al.

Biology, Journal Year: 2025, Volume and Issue: 14(2), P. 168 - 168

Published: Feb. 7, 2025

Climate change is a major challenge affecting marine environments, making it essential to understand species distribution responses in both time and space for effective conservation strategies. Meanwhile, varying of climate may lead changes interspecific relationships future spatial distributions. This study assessed temporal distributions four trophically dependent economic importance the China seas, including largehead hairtail (Trichiurus lepturus), Spanish mackerel (Scomberomorus niphonius), chub (Scomber japonicus), anchovy (Engraulis japonicus). By incorporating fishery-dependent survey data environmental variables, we developed spatio-temporal mixed-effects model analyze distributional correlations among these predicted their by end century under different scenarios. The results showed that selected factors influenced encounter probability catch rates differently. Predictions representative concentration pathways (RCPs) 2.6 RCP8.5 suggested significant shifts population densities, with like T. lepturus S. niphonius experiencing reduced densities altered patterns, while E. japonicus benefit from change. center gravity most was projected shift northward year 2050, notable variations RCP8.5. Additionally, overlap expected decrease significantly 2100, indicating increasing divergence underscores effects on habitat offers scientific basis protection.

Language: Английский

Citations

0
Influence of temporal regulations on harvest and discards in the recreational Gulf of Mexico gag (Mycteroperca microlepis) fishery DOI Creative Commons
A. Challen Hyman, David Chagaris,

Thomas K. Frazer

et al.

Fisheries Research, Journal Year: 2025, Volume and Issue: 285, P. 107332 - 107332

Published: April 9, 2025

Language: Английский

Citations

0
Modeling effort in a multispecies recreational fishery; Influence of species-specific temporal closures, relative abundance, and seasonality on monthly angler-trips DOI Creative Commons
A. Challen Hyman, David Chagaris, Michael Drexler

et al.

Fisheries Research, Journal Year: 2024, Volume and Issue: 279, P. 107136 - 107136

Published: Aug. 8, 2024

Language: Английский

Citations

2
Role of abiotic drivers on crab burrow distribution in a saltmarsh wetland DOI Creative Commons
Xue Chen, Zeng Zhou, Qiang He

et al.

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: Nov. 10, 2022

Crab burrows play an important role in saltmarsh wetlands and are a useful indicator of wetland condition. The spatiotemporal distribution crab varies considerably tidal wetlands. However, the reasons for these variations poorly understood, part, due to limited availability comprehensive field data. Based on two-year continuous observation at northern Jiangsu Coast, China, this study explored relationship between burrow density environmental variables, including median grain size, water content, organic matter soil salinity, elevation. Our results show that was unimodal across shore winter spring (Nov-Apr) when air temperature relatively low, while bimodal summer autumn (May-Oct) high. larger areas with higher lower it stronger hydrodynamics suspended sediment concentration. were more abundant vegetated than un-vegetated areas. A backward stepwise model selection performed based R-square Akaike information criterion (AIC) distinguish main driving factors determine distribution. Results suggested principal content salinity all seasons, addition warm seasons. Overall, provides dataset in-depth understanding scientific basis sustainable management

Language: Английский

Citations

7
Beautiful swimmers attack at low tide DOI
David Samuel Johnson

Ecology, Journal Year: 2022, Volume and Issue: 103(10)

Published: June 21, 2022

Appendix S1 Video VideoS1_Legend Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by authors. Any queries (other than missing content) should be directed to corresponding author article.

Language: Английский

Citations

5
Spatial Variation in Nursery Habitat Use by Juvenile Blue Crabs in a Shallow, Wind-Driven Estuary DOI
Erin P. Voigt, David B. Eggleston

Estuaries and Coasts, Journal Year: 2022, Volume and Issue: 46(2), P. 526 - 540

Published: Dec. 2, 2022

Language: Английский

Citations

5
Assessment of treatment-specific tethering survival bias for the juvenile blue crab Callinectes sapidus in a simulated salt marsh DOI Creative Commons
Cole R. Miller, A. Challen Hyman, Daniel Shi

et al.

PLoS ONE, Journal Year: 2023, Volume and Issue: 18(10), P. e0289398 - e0289398

Published: Oct. 23, 2023

The blue crab (Callinectes sapidus) is ecologically and economically important in Chesapeake Bay. Nursery habitats, such as seagrass beds, disproportionately contribute individuals to the adult segment of populations. Salt marshes dominated by smooth cordgrass Spartina alterniflora are intertidal nursery habitats which may serve a refuge from predation for juvenile crabs. However, effects various characteristics salt on metrics, survival, have not been quantified. Comparisons survival between other often employ tethering assess survival. Although experimental bias when prey well recognized, potential habitat-specific has experimentally tested. Using short-term mesocosm experiments, we tested if simulated marsh produces bias. Juvenile crabs were tethered or un-tethered randomly allocated mesocosms at varying shoot densities unstructured sand. Tethering reduced its effect was habitat specific, irrespective density, evidenced non-significant interaction treatment habitat. Thus, did produce treatment-specific relative unvegetated across range densities; positively related density. These findings indicate that useful method assessing marshes, with including algae

Language: Английский

Citations

2
Predicting Predator Abundance from Prey in Estuaries: Insights from Single and Joint Species Distribution Modeling DOI
Sally Dowd, Sarah M. Roberts, Nathan M. Bacheler

et al.

Estuarine Coastal and Shelf Science, Journal Year: 2024, Volume and Issue: unknown, P. 109083 - 109083

Published: Dec. 1, 2024

Language: Английский

Citations

0