Marine Fish Passage—Underappreciated Threats to Connectivity Within the Marine Environment

Marine Ecology, Journal Year: 2025, Volume and Issue: 46(1)

Published: Jan. 1, 2025

ABSTRACT Habitat fragmentation is a major threat to aquatic biodiversity loss. However, much of the focus on connectivity freshwaters, with less attention given marine ecosystems. We contend that coastal infrastructure including bridges, causeways, tidal turbines, land infilling and harbours, wharfs, quays, piers docks have resulted in underappreciated impacts fish movements resulting passage challenges at sea. For each type infrastructure, we synthesised present status knowledge characterise problems future also identify mitigation options solutions restore for fishes. Bridges can disrupt currents, generate light noise/vibration, emit electromagnetic signals, so more work needed modify in‐water designs minimise negative Causeways involve infilling, full barriers, requiring fishes circumnavigate these structures there limited research (e.g., fishways). Tidal turbines are placed areas high which hinder result entrainment; however, monitoring challenging unique areas. Offshore energy has grown recent years impact via altered sediment dynamics water as well through generation noise pollution fields. Land filling results not only habitat loss but fragmentation, it will be imperative important habitats corridors there. Finally, associated boats docks) negatively nearshore habitat, alter movement trajectories. In collective, found evidence diverse types and, ultimately, migrations. Interestingly,bespoke environments seem rare. As development increase future, assess potential issues from mitigate organisms.

Language: Английский

---

Fish movement

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 91 - 117

Published: Jan. 1, 2025

---

Integrated patterns of residence and movement create testable hypotheses about fish feeding migrations

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Feb. 18, 2025

Developing and testing alternate hypotheses about patterns, mechanisms, consequences of movement in geographically-large, heterogeneous, natural systems can advance the scientific understanding animal migration benefit conservation most mobile species. Within organismal trajectories, different combinations residence are predicted from existing ecological theories (e.g. long distance migration, site fidelity, central place foraging, ideal free distribution, habitat shifts). However, these conceptually-based, spatially-explicit field be logistically challenging. Here our purpose is to introduce Resmo, a framework metrics analyses that integrate site-specific RESidence across-site MOvements. We illustrate insights this using empirical example coastal Striped Bass (Morone saxatilis) during their seasonal feeding migration. Our use Resmo applied telemetry data enhanced behavior migratory fish, suggested testable ecologically-meaningful identified criteria on which base selection future sampling locations. In summary, approach provides useful new direction for thinking movement, biological conservation, priorities collection related distribution organisms.

Language: Английский

---

Moving away from home: early life movements and space use in juvenile Montagu’s Harriers (Circus pygargus) from central Italy

Avian Research, Journal Year: 2025, Volume and Issue: unknown, P. 100239 - 100239

Published: March 1, 2025

Language: Английский

---

Lords of the flies: dipteran migrants are diverse, abundant and ecologically important

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

ABSTRACT Insect migrants are hugely abundant, with recent studies identifying the megadiverse order Diptera as major component of many migratory assemblages. Despite this, their behaviour has been widely overlooked in favour more ‘charismatic’ migrant insects such butterflies, dragonflies, and moths. Herein we review available literature on dipteran migration to determine its prevalence, identify key routes elucidate areas that may prove fruitful for future research. Using 13 lines evidence behaviour, determined species from 60 out 130 families show migration, Syrphidae fulfilling 12 these criteria, followed by Tephritidae 10. By contrast, 22 met just two criteria or fewer, underlining need research into characteristics groups. In total, 592 were identified potentially migratory, making them most speciose group insect yet described. only 0.5% found be migrants, a figure rising 3% Syrphidae, percentage mirrored other taxa noctuid moths, bats. Research was biased locations Europe (49% publications) while vast regions remain understudied, our flyways used across all biogeographic realms. Finally, highlight an unsurpassed level ecological diversity within including roles huge economic value. Overall, this highlights how little is known about vital health global ecosystems.

Language: Английский

---

Putting the health in hidden Markov models: incorporating allostatic load indices into movement ecology analyses

Conservation Physiology, Journal Year: 2025, Volume and Issue: 13(1)

Published: Jan. 1, 2025

Individual animal health assessments are a key consideration for conservation initiatives. Environmental shifts associated with climate change, such as documented rises in pathogen emergence, predation pressures and human activities, create an increasingly stressful world many species have been linked marked changes movement behaviour. Even healthy individuals, variations allostatic load, the cumulative effects of long-term stress, may alter behavioural priorities over time. Here, we aimed to build links between assessment information ecology, using narwhals Canadian Arctic case study. A composite stress index was developed incorporate multiple available (e.g. assessments), hormones) body condition metrics from clinically applied within framework widely used hidden Markov modelling data. Individuals higher tended prioritize behaviours indicative response, including increasing probability transitioning transiting behaviour compared those lower index. By incorporating that synthesizes indices flexible framework, highlight load be important explaining variation behaviour, even seemingly animals. The presented here highlights approach provides is applicable existing future work on range species.

Language: Английский

---

Climate change impacts on altitudinal movements of society large mammals in the Alborz

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: April 13, 2025

This study examines the impact of climate change on altitudinal movement patterns and number individuals four large mammal species within Central Alborz Protected Area (CAPA) region Mountains, a biodiversity hotspot, over 23-year period (1999 to 2022). During warm season (May 25-September 29), temperatures were reported have increased by 2-2.5 °C, while relative humidity was observed decreased 4-4.5%. Compared past two decades (2000-2022), Caspian red deer initiate their annual high-altitude migrations 15-20 days earlier, with in summer range increasing more than threefold. Wild goats also migrated peak arrivals from 20-36 (1999-2003) 36-57 (2018-2022) between May 25 31, highlighting temperature as primary driver herbivore movement. In contrast, brown bears exhibited subtle movement, likely influenced both humidity. boars, an approximate 40% increase individuals, tended return lower elevations earlier previous years (1999-2003). These highlight role significant regulator ecology, influencing habitat use. However, human-induced barriers, such roads settlements, present additional threats these seasonal migrations. underscores urgent need for adaptive management strategies, including protection corridors, expansion core zones, enhanced community engagement, support resilience under changing climatic conditions.

Language: Английский

---

Pathogen and Gene Expression Profiles of Atlantic Salmon From an Endangered Population

Aquatic Conservation Marine and Freshwater Ecosystems, Journal Year: 2025, Volume and Issue: 35(4)

Published: April 1, 2025

ABSTRACT The role of pathogens in impacting the behaviour and fate salmonids has been studied extensively for some selected such as sea lice. However, whole pathobiome fish are seldom considered may confound influence study species situ. In this study, we investigated presence returning adult wild hatchery salmon river Vosso using gill samples analysed high‐throughput PCR with a selection assays targeting different pathogens. addition, were gene expressions that have previously linked to imminent mortality, thermal stress, inflammation related biomarkers. These data individual collected from acoustic telemetry tags inserted abdomen fish. Previous analyses suggested area is different; however, there was no evidence or expression two groups (39 14 hatchery) could explain behavioural differences between these groups. Furthermore, neither pathogen profile nor had significant relationship metrics survival Results suggest screenings insufficient predict fates migrating salmon. threatened population Norway after collapsing 1980s; contribute ongoing efforts identify factors limiting recovery decades poor returns.

Language: Английский

---

Worlds that collide: conservation applications of behaviour and culture in human–wildlife interactions

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2025, Volume and Issue: 380(1925)

Published: May 1, 2025

The behaviour of both humans and wildlife is central to the conservation biodiversity because requires human actions at multiple scales. In species with evidence socially learned culture, juxtaposition animal culture increases complexity human-wildlife interactions their investigation but also offers opportunities mitigate negative interactions. this paper, we consider language used analyse human-animal review effect behaviours on those We investigate how knowledge theory from behavioural studies can be negotiate complex between wildlife, providing specific examples mined for developing policies regarding highlight that are such a key target conservation. Integrating social learning into research scope leverage gaps, misconceptions concerns targeted, relevant meaningful.This article part theme issue 'Animal culture: in changing world'.

Language: Английский

---

Large Yearly Fluctuations in Congregation Sizes of Migratory Danainae Butterflies in the Western Ghats, India

Biotropica, Journal Year: 2025, Volume and Issue: 57(3)

Published: May 1, 2025

ABSTRACT We documented the overwintering congregations of migratory Danainae butterflies (Nymphalidae) over six seasons in threatened tropical forests Western Ghats, India. Congregation sizes fluctuated drastically (> 90%), indicating vulnerability to chance events. Continued monitoring is needed explain these fluctuations and identify declining trends for timely conservation action.

Language: Английский

---