Transient cognitive impacts of oxygen deprivation caused by catch-and-release angling

Biology Letters, Journal Year: 2025, Volume and Issue: 21(1)

Published: Jan. 1, 2025

Vertebrate brain function is particularly sensitive to the effects of hypoxia, with even brief periods oxygen deprivation causing significant damage and impaired cognitive abilities. This study first investigate consequences hypoxia in fish, specifically induced by exhaustive exercise air exposure, conditions commonly encountered during catch-and-release (C&R) practices recreational fishing. Angling exerts substantial pressure on inland fish populations, underscoring need for sustainable like C&R. While C&R survival rates are generally high, understanding its sublethal impacts crucial evaluating practice’s ethical ecological sustainability. We examined these stressors 238 rainbow trout, using free movement pattern Y-maze method assess working memory through navigational search patterns exploration sessions. Our results showed that exposure led short-term (3–4 h post-treatment), but transient impairments memory, no long-term deficits observed at one week month post-treatment. These findings emphasize high tolerance support sustainability as a tool fisheries management.

Language: Английский

---

How can physiology best contribute to wildlife conservation in a warming world?

Conservation Physiology, Journal Year: 2023, Volume and Issue: 11(1)

Published: Jan. 1, 2023

Abstract Global warming is now predicted to exceed 1.5°C by 2033 and 2°C the end of 21st century. This level associated environmental variability are already increasing pressure on natural human systems. Here we emphasize role physiology in light latest assessment climate Intergovernmental Panel Climate Change. We describe how can contribute contemporary conservation programmes. focus thermal responses animals, but acknowledge that impacts change much broader phylogenetically environmentally. A physiological contribution would encompass monitoring, coupled with measuring individual sensitivities temperature upscaling these ecosystem level. The version widely accepted Conservation Standards designed Measures Partnership includes several explicit considerations. argue has a unique play addressing Moreover, be incorporated institutions organizations range from international bodies national governments local communities, doing so, it brings mechanistic approach management biological resources.

Language: Английский

---

Energetics of collective movement in vertebrates

Journal of Experimental Biology, Journal Year: 2023, Volume and Issue: 226(20)

Published: Oct. 15, 2023

The collective directional movement of animals occurs over both short distances and longer migrations, is a critical aspect feeding, reproduction the ecology many species. Despite implications motion for lifetime fitness, we know remarkably little about its energetics. It commonly thought that animal saves energy: moving alone against fluid flow expected to be more energetically expensive than in group. Energetic conservation resulting from most often inferred kinematic metrics or computational models. However, direct measurement total metabolic energy savings during compared with solitary range speeds has yet documented. In particular, duration higher speed must involve aerobic non-aerobic (high-energy phosphate stores substrate-level phosphorylation) contributions, no study date quantified types contribution comparison locomotion by individuals. There are multiple challenging questions regarding energetics aquatic, aerial terrestrial environments remain answered. We focus on aquatic as model system demonstrate understanding cost requires integration biomechanics, dynamics bioenergetics unveil hydrodynamic physiological phenomena involved their underlying mechanisms.

Language: Английский

---

Fish Injury from Movements across Hydraulic Structures: A Review

Water, Journal Year: 2023, Volume and Issue: 15(10), P. 1888 - 1888

Published: May 16, 2023

Fish migration is essential to maintain healthy aquatic ecosystems, but hydraulic structures across rivers have impeded natural fish worldwide. While efforts been made allow pass some structures, there limited understanding of hydrodynamic effects that cause injury in different systems, such as spillways and stilling basins well hydropower systems. This study reviewed available literature on this topic identify the current knowledge thresholds laboratory- field-based studies Often, lead described with time-averaged simplified parameters including shear stress, pressure changes, acceleration, vortical motions, aeration, collision, strike, while these often occur simultaneously turbulent flows making it difficult link specific injuries a particular effect. Strong variations may occur, depending type intensity effects, species sizes. Modelling can provide information stressors, real-world tests are needed accurately assess mortality. mechanisms at turbines understood, however, clear other sites lacking. Future should aim report holistic associated rates. Multidisciplinary systematic research required, laboratory field studies, using passive tracer sensor packages state-of-the art instrumentation conjunction live fish. quantify stressors meaningful parameters, aiming improve safety more sustainable design water infrastructure reduces when passing structures.

Language: Английский

---

Energy conservation by collective movement in schooling fish

eLife, Journal Year: 2023, Volume and Issue: 12

Published: Oct. 27, 2023

Many animals moving through fluids exhibit highly coordinated group movement that is thought to reduce the cost of locomotion. However, direct energetic measurements demonstrating energy-saving benefits fluid-mediated collective movements remain elusive. By characterizing both aerobic and anaerobic metabolic energy contributions in schools giant danio (Devario aequipinnatus), we discovered fish have a concave upward shaped metabolism-speed curve, with minimum at ~1 body length s-1. We demonstrate total expenditure (TEE) per tail beat by up 56% compared solitary fish. When reaching their maximum sustained swimming speed, had 44% higher performance used 65% less non-aerobic individuals, which lowered TEE transport 53%, near lowest recorded for any aquatic organism. Fish also recovered from exercise 43% faster than The savings occur when actively swim high speed can considerably improve peak repeated likely be beneficial evading predators. These may underlie prevalence locomotion fishes.

Language: Английский

---

Energy conservation by group dynamics in schooling fish

Published: Oct. 27, 2023

Many animals moving through fluids exhibit highly coordinated group movement that is thought to reduce the cost of locomotion. However, direct energetic measurements demonstrating energy-saving benefits fluid-mediated movements remain elusive. By characterizing both aerobic and anaerobic metabolic energy contributions in schools Giant danio ( Devario aequipinnatus ) fish, we discovered fish have a J -shaped metabolism–speed curve, with minimum at ∼1 body length s -1 . We demonstrate total expenditure (TEE) per tail beat by up 56% compared solitary fish. When reaching their maximum sustained swimming speed, had 44% higher performance used 65% lower non-aerobic for high-speed individuals, which lowered TEE transport 53%, near lowest recorded any aquatic organism. Fish also recovered from exercise 43% faster than The savings occurs when actively swim high speed can considerably improve peak repeated likely be beneficial evading predators. These may underlie prevalence locomotion fishes.Fish showed metabolism-speed curve reduced use

Language: Английский

---

Under the sea: How can we use heart rate and accelerometers to remotely assess fish welfare in salmon aquaculture?

Aquaculture, Journal Year: 2023, Volume and Issue: 579, P. 740144 - 740144

Published: Sept. 21, 2023

Recent advances in bio-sensing technologies open for new possibilities to monitor and safeguard the welfare of fishes aquaculture. Yet before taken into practice, applicability all novel biosensors must be validated, breadth their potential uses investigated. Here, we investigated how ECG accelerometry-derived parameters measured using bio-loggers, such as heart rate, acceleration variance acceleration, relate O2 consumption rate (MO2) blood borne indicators stress tissue damage determine biologgers may used estimate welfare. To do this, instrumented 13 fish with a biologger an intravascular catheter subjected them swimming protocol followed by throughout which physiological were analyzed posteriori. Additionally, based on empirical data obtained, calculated mathematical relationships between bio-logger other tested relationship linear regression algorithms parameters. Our results show that is good proxy activity it closely related tail beat frequency. In addition, can predictors metabolic rate. Accelerometry data, especially significantly explain some variation venous partial pressure O2, lactate plasma cortisol concentration. Variance also explains pH mean corpuscular hemoglobin These are explained being indicator onset burst-swimming activity, often acid-base imbalances release catecholamines. The herein indicate extrapolate range stress-related events when these accompanied increases highlight great monitoring

Language: Английский

---

Using vitality indicators to predict survival of aquatic animals released from fisheries

Conservation Physiology, Journal Year: 2024, Volume and Issue: 12(1)

Published: Jan. 1, 2024

Estimating the survival probability of animals released from fisheries can improve overall understanding animal biology with implications for management, conservation and welfare. Vitality indicators are simple visual measures condition that change in response to stressors (like capture) be assessed predict post-release survival. These typically include immediate reflex responses which combined into a score. straight-forward non-invasive metrics allow users quantify how close (or far) an is normal, 'healthy' or baseline state, turn correlated outcomes such as probability, given appropriate calibration. The literature on using vitality has grown rapidly over past decade. We identified 136 papers used context. studies were primarily focused marine freshwater fishes, few examples herptiles crustaceans. types diverse sometimes taxa-specific (e.g. pinching leg turtles, spraying water at nictitating membrane sharks) most commonly being those assess escape righting vulnerability when reflexes impaired. By presenting Pacific salmon case study, we propose framework across taxa fisheries.

Language: Английский

---

A review of adult salmon maximum swim performance.

Canadian Journal of Fisheries and Aquatic Sciences, Journal Year: 2024, Volume and Issue: 81(9), P. 1174 - 1216

Published: Feb. 15, 2024

Salmonids undertake long and strenuous migrations that require aerobic endurance anaerobic burst swimming. Anthropogenic activity natural disasters can make already challenging even more difficult. This reinvigorates a central question: what is the maximum swimming capacity of adult salmon species across environmental conditions? We synthesized literature on swim performance ( Oncorhynchus spp. Salmo salar) to unfold known about how biological (sex body size) physical (temperature) factors affect in salmon. Maximum swimming—bursting, jumping, leaping—are among least studied performances salmonids. Commonly, has been measured using flumes, but evidently faster wild than this set-up capture. show larger fish outswim smaller ones, thermal sensitivity differs inter-and -intra-specifically. Unresolved are temperatures, between males females maturity states. information be used inform exercise physiology research future management mitigation actions necessary conserve these iconic, economically valuable species.

Language: Английский

---

The Need for Reporting Rationale and Detailed Methods in Studies that Surgically Implant Fish with Electronic Tracking Devices

Fisheries, Journal Year: 2023, Volume and Issue: 48(9), P. 388 - 394

Published: June 16, 2023

Abstract Each year, thousands of fishes are tagged with electronic devices to study their biology and inform fisheries management. Such research assumes that the process capturing, tagging, then holding fish allow them recover before release (i.e., “tagging process”) does not alter physiology, behavior, survival these fish. However, can experience physiological challenges during tagging may affect behavior survival. We have observed rationale used establish protocols for durations conditions following surgery has received little attention. Here, we provide a perspective that: (1) provides an overview its effects on fish; (2) highlights diverse by researchers (that often inadequately described seem arbitrary); (3) identifies key needs. conclude decisions whether, how, how long hold depend circumstances need be evaluated researchers. recommend explicitly report details when, where, why held facilitate benefit welfare, science,

Language: Английский

---