A matter of scale: Identifying the best spatial and temporal scale of environmental variables to model the distribution of a small cetacean DOI Creative Commons
Tiffany Goh, Mark Jessopp, Emer Rogan

и другие.

Ecology and Evolution, Год журнала: 2024, Номер 14(8)

Опубликована: Авг. 1, 2024

Abstract The importance of scale when investigating ecological patterns and processes is recognised across many species. In marine ecosystems, the that drive species distribution have a hierarchical structure over multiple nested spatial temporal scales. Hence, multi‐scale approaches should be considered developing accurate models to identify key habitats, particularly for populations conservation concern. Here, we propose modelling procedure best each modelled remotely sensed oceanographic variable model harbour porpoise ( Phocoena phocoena ) within Irish Exclusive Economic Zone. Harbour sightings were recorded during dedicated line‐transect aerial surveys conducted in summers 2016, 2021 2022. Binary generalised additive used assess relationships between presence variables at different (5–40 km) (daily, monthly survey period) Selected included sea surface temperature, thermal fronts, chlorophyll‐a, height, mixed layer depth salinity. A total 30,514 km was covered on‐effort with 216 recorded. Overall, corresponded coarsest resolution this study (40 km), while showed stronger association summarised longer scale. Habitat including covariates coarse scales may better reflect driving availability abundance resources these large These findings support hypothesis approach applied distribution. Identifying suitable would improve functional interpretation underlying relationships, studying how small predator interacts its environment responds climate ecosystem changes.

Язык: Английский

Evaluating drivers of recent large whale strandings on the East Coast of the United States DOI Creative Commons
Lesley H. Thorne, David N. Wiley

Conservation Biology, Год журнала: 2024, Номер 38(6)

Опубликована: Май 29, 2024

Anthropogenic stressors threaten large whales globally. Effective management requires an understanding of where, when, and why threats are occurring. Strandings data provide key information on geographic hotspots risk the relative importance various threats. There is currently considerable public interest in increased frequency whale strandings occurring along US East Coast United States since 2016. Interest accentuated due to a purported link with offshore wind energy development. We reviewed spatiotemporal patterns strandings, mortalities, serious injuries humpback (Megaptera novaeangliae), species most frequently involved, for which government has declared "unusual mortality event" (UME). Our analysis highlights role vessel strikes, exacerbated by recent changes distribution traffic. Humpback have expanded into new foraging grounds years. Mortalities strikes significantly these newly occupied regions, show high traffic that also markedly during UME. Surface feeding shallow waters may been contributing factors. found no evidence development contributed or mortalities. This work need consider behavioral, ecological, anthropogenic factors determine drivers injury informed guidance decision-makers.

Язык: Английский

Процитировано

3

Surface and subsurface oceanographic features drive forage fish distributions and aggregations: Implications for prey availability to top predators in the US Northeast Shelf ecosystem DOI Creative Commons
Chandra Goetsch, Julia Gulka, Kevin D. Friedland

и другие.

Ecology and Evolution, Год журнала: 2023, Номер 13(7)

Опубликована: Июль 1, 2023

Forage fishes are a critical food web link in marine ecosystems, aggregating hierarchical patch structure over multiple spatial and temporal scales. Surface-level forage fish aggregations (FFAs) represent concentrated source of prey available to surface- shallow-foraging predators. Existing survey analysis methods often imperfect for studying at scales appropriate foraging predators, making it difficult quantify predator-prey interactions. In many cases, general distributions species known; however, these may not surface-level availability Likewise, we lack an understanding the oceanographic drivers patterns aggregation or community patterns. Specifically, applied Bayesian joint distribution models bottom trawl data assess species- community-level across US Northeast Continental Shelf (NES) ecosystem. Aerial digital surveys gathered on surface FFAs two project sites within NES, which used spatially explicit model estimate abundance size FFAs. We examine aggregations. Our results suggest that, regions high richness consistent with FFA abundance. Bathymetric depth drove both patterns, while subsurface features, such as mixed layer depth, primarily influenced behavior sea temperature, sub-mesoscale eddies, fronts diversity. combination, help predators novel application aerial data.

Язык: Английский

Процитировано

6

Assessing small pelagic fish trends in space and time using piscivore stomach contents DOI
Sarah Gaichas, James Gartland, Brian E. Smith

и другие.

Canadian Journal of Fisheries and Aquatic Sciences, Год журнала: 2023, Номер 81(8), С. 990 - 1012

Опубликована: Окт. 4, 2023

Changing distribution and abundance of small pelagic fishes may drive changes in predator distributions, affecting availability to fisheries surveys. However, pelagics are difficult survey directly, so we developed a novel method assessing the aggregate 21 forage taxa via stomach contents. We used contents collected from 22 piscivore species captured by multiple bottom trawl surveys within vector autoregressive spatio-temporal model assess trends on Northeast US shelf. The goal was develop spatial “forage index” inform (or) fishery western North Atlantic bluefish ( Pomatomus saltatrix) stock assessment. This spatially resolved index compared favorably with more traditional design-based biomass indices for well sampled our content-based better represented smaller unmanaged that not designed capture. stomach-based helped explain recreational assessment provided insight into throughout regional ecosystem.

Язык: Английский

Процитировано

6

Atlas of Pacific sand lance (Ammodytes personatus) benthic habitat – application of multibeam acoustics and directed sampling to identify viable subtidal substrates DOI
M. R. Baker, H. Gary Greene, John Aschoff

и другие.

Marine Environmental Research, Год журнала: 2024, Номер 202, С. 106778 - 106778

Опубликована: Окт. 5, 2024

Язык: Английский

Процитировано

2

Effects of Oceanographic Conditions on Fishery Distribution: A Case Study of Chub Mackerel (Scomber japonicus) in Northeastern Taiwan DOI
Sandipan Mondal,

Frank Muller-Karger,

Aratrika Ray

и другие.

Marine Environmental Research, Год журнала: 2024, Номер 202, С. 106803 - 106803

Опубликована: Окт. 18, 2024

Язык: Английский

Процитировано

1

A matter of scale: Identifying the best spatial and temporal scale of environmental variables to model the distribution of a small cetacean DOI Creative Commons
Tiffany Goh, Mark Jessopp, Emer Rogan

и другие.

Ecology and Evolution, Год журнала: 2024, Номер 14(8)

Опубликована: Авг. 1, 2024

Abstract The importance of scale when investigating ecological patterns and processes is recognised across many species. In marine ecosystems, the that drive species distribution have a hierarchical structure over multiple nested spatial temporal scales. Hence, multi‐scale approaches should be considered developing accurate models to identify key habitats, particularly for populations conservation concern. Here, we propose modelling procedure best each modelled remotely sensed oceanographic variable model harbour porpoise ( Phocoena phocoena ) within Irish Exclusive Economic Zone. Harbour sightings were recorded during dedicated line‐transect aerial surveys conducted in summers 2016, 2021 2022. Binary generalised additive used assess relationships between presence variables at different (5–40 km) (daily, monthly survey period) Selected included sea surface temperature, thermal fronts, chlorophyll‐a, height, mixed layer depth salinity. A total 30,514 km was covered on‐effort with 216 recorded. Overall, corresponded coarsest resolution this study (40 km), while showed stronger association summarised longer scale. Habitat including covariates coarse scales may better reflect driving availability abundance resources these large These findings support hypothesis approach applied distribution. Identifying suitable would improve functional interpretation underlying relationships, studying how small predator interacts its environment responds climate ecosystem changes.

Язык: Английский

Процитировано

0