Movement and thermal niche of the first satellite‐tagged Mediterranean spearfish (<i>Tetrapturus belone</i>)

Arostegui, Martin C.; Braun, Camrin D.; Gaube, Peter

doi:10.1111/fog.12413

Cited by 8 publications

(11 citation statements)

References 31 publications

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“…However, this requires a tremendous amount of work, hampering general applications to the vast number of invertebrates worldwide. Approaches correlating data on species distributions and ambient temperature (Elith & Leathwick 2009;Arostegui et al 2019) estimate realized thermal niches by accounting for additional ecological dimensions, but depend heavily on high-quality species occurrence data that are rarely available for most invertebrates.…”

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confidence: 99%

Integrating trait-based movement into mechanistic predictions of thermal performance

Terlau

Brose

Antunes

et al. 2022

Preprint

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Despite the diversity and functional importance of invertebrates, predicting their response to global warming remains challenging as it requires extensive measurements of physiological performance or rarely available high-resolution distribution data. Mechanistic models can help overcome these limitations by generalizing fundamental physiological processes. However, their predictions typically omit the effects of species interactions. Movement is a key process of species interactions underpinning animal performance in the real world. Here, we developed an empirically-grounded mechanistic model that incorporates allometric and thermodynamic constraints on movement and predator-prey interactions. We illustrate how it can be used to quantify the thermal performance of invertebrates under current and future climatic conditions. This trait-based approach (1) contributes to our understanding of the mechanisms underlying thermal fitness, (2) allows generalized predictions of thermal performance across invertebrate species worldwide and (3) can be used to inform species distribution models and thereby help infer species range limits under climate change.

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confidence: 99%

Integrating trait-based movement into mechanistic predictions of thermal performance

Terlau

Brose

Antunes

et al. 2022

Preprint

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“…Some research has suggested that species facing significant physiological limitations and/or exhibiting frequent surface occupation during daytime may rely on the nighttime migration of scattering layer prey into the epipelagic ( 56 – 58 ). This interpretation is supported, in some cases, by mesopelagic prey items in the diet of truly epipelagic species, e.g., shortbill spearfish: ( 59 , 60 ). However, recent work suggests that some predators may also target shallow scattering layers in the open ocean during the day ( 61 , 62 ), which may be a more common strategy among surface-oriented, or otherwise physiologically limited, pelagic predators than previously recognized.…”

Section: Discussionmentioning

confidence: 93%

Linking vertical movements of large pelagic predators with distribution patterns of biomass in the open ocean

Braun,

Della Penna,

Arostegui

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Many predator species make regular excursions from near-surface waters to the twilight (200 to 1,000 m) and midnight (1,000 to 3,000 m) zones of the deep pelagic ocean. While the occurrence of significant vertical movements into the deep ocean has evolved independently across taxonomic groups, the functional role(s) and ecological significance of these movements remain poorly understood. Here, we integrate results from satellite tagging efforts with model predictions of deep prey layers in the North Atlantic Ocean to determine whether prey distributions are correlated with vertical habitat use across 12 species of predators. Using 3D movement data for 344 individuals who traversed nearly 1.5 million km of pelagic ocean in > 42,000 d, we found that nearly every tagged predator frequented the twilight zone and many made regular trips to the midnight zone. Using a predictive model, we found clear alignment of predator depth use with the expected location of deep pelagic prey for at least half of the predator species. We compared high-resolution predator data with shipboard acoustics and selected representative matches that highlight the opportunities and challenges in the analysis and synthesis of these data. While not all observed behavior was consistent with estimated prey availability at depth, our results suggest that deep pelagic biomass likely has high ecological value for a suite of commercially important predators in the open ocean. Careful consideration of the disruption to ecosystem services provided by pelagic food webs is needed before the potential costs and benefits of proceeding with extractive activities in the deep ocean can be evaluated.

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“…This mirrors diel changes in the depth distribution of catchability for other species captured in Pacific longline fisheries (Ward & Myers 2005) that exhibit distinct diel movement patterns (e.g. Abecassis et al 2012, Arostegui et al 2019b, as well as the more restricted descents and increased CPUE of pelagic fishes in regions where they experience vertical habitat compression (Prince & Goodyear 2006, Stramma et al 2012, Carlisle et al 2017, Arostegui et al 2019a. While past telemetry of common mola suggested that they may track vertically migrating prey and feed during the day and night (Sims et al 2009a), more recent animal-borne data from the species revealed they only rarely feed at night (Nakamura et al 2015).…”

Section: Discussionmentioning

confidence: 73%

Spatiotemporal segregation of ocean sunfish species (Molidae) in the eastern North Pacific

Arostegui

Braun

Woodworth-Jefcoats

et al. 2020

Mar. Ecol. Prog. Ser.

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Ocean sunfishes or molas (Molidae) are difficult to study as a result of their extensive movements and low densities in remote waters. In particular, little is known of the environmental niche separation and differences in the reproductive or movement ecology of molids in sympatry. We investigated spatiotemporal dynamics in the distribution of the common mola Mola mola, sharptail mola Masturus lanceolatus, and slender mola Ranzania laevis in the eastern North Pacific. We used observer data from a commercial fishery consisting of 85000+ longline sets spanning 24 yr, >50° in longitude, and >45° in latitude. Satellite altimetry analysis, species distribution modeling, and multivariate ordination revealed thermal niche separation, spatiotemporal segregation, and distinct community associations of the 3 molid species. Our quantitative findings suggest that the common mola is a more temperate species, while slender and sharptail mola are more (sub)tropical species, and that slender (and possibly also sharptail) mola undergo spawning migrations to the region around the Hawaiian Islands. In addition, we identified potential effects of fishing gear type on molid catch probability, an increasing trend in catch probability of a vulnerable species perhaps related to a shift in the distribution of fishing effort, and the possible presence in the fishery of a fourth molid species being misidentified as a congener, all of which are important conservation considerations for these enigmatic fishes.

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Movement and thermal niche of the first satellite‐tagged Mediterranean spearfish (Tetrapturus belone)

Cited by 8 publications

References 31 publications

Integrating trait-based movement into mechanistic predictions of thermal performance

Integrating trait-based movement into mechanistic predictions of thermal performance

Linking vertical movements of large pelagic predators with distribution patterns of biomass in the open ocean

Spatiotemporal segregation of ocean sunfish species (Molidae) in the eastern North Pacific

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