The silver king in the Magic City: Observation of Atlantic tarpon Megalops atlanticus aggregation off Miami, Florida DOI Creative Commons
Julia Saltzman, Clare E. Hawkins, Catherine Macdonald

et al.

Journal of Fish Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Abstract Due to the logistical and financial challenges in studying migratory marine species, there is relatively limited knowledge of reproductive biology, behavior, habitat use many ecologically important megafauna including Atlantic tarpon Megalops atlanticus . Here, we present a novel observation using consumer‐grade aerial drones observe, quantify scale of, classify behaviors within previously unreported aggregation ( N = 182) over course 2‐day fish event. After event, analysed compared observed (e.g., cruising clustering) with those other species well‐documented behaviors, revealing potentially consistent courtship, leading us believe this be possible spawning or reproductive/migratory significance. This occurred highly altered urbanized off coast South Florida, during winter, outside tarpon's reported spring summer season. Although few studies date have used monitor teleosts, study reinforces their potential value as tool for monitoring populations, movement.

Language: Английский

Habitat management and restoration as missing pieces in flats ecosystems conservation and the fishes and fisheries that they support DOI Creative Commons
Lucas P. Griffin, Andy J. Danylchuk, Grace A. Casselberry

et al.

Fisheries, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

ABSTRACT Flats ecosystems are dynamic, shallow, nearshore marine environments that interconnected and provide immense ecological socio-economic benefits. These habitats support a diversity of fish populations various fisheries, yet they increasingly threatened by anthropogenic stressors, including overfishing, habitat degradation, coastal development, the cascading effects climate change. Effective management restoration essential but often missing for flats ecosystems. Despite navigating landscape imperfect knowledge these systems, decisive action implementation protection is currently needed through policy practice. We present comprehensive set 10 strategic guiding principles necessary integrating conservation flat include calls ecosystem-based ­management, adaptive strategies leverage diverse partnerships, scientific research, legislative initiatives, local traditional knowledge. Drawing on successes in other environmental realms, we emphasize importance evidence-informed approaches to address complexities uncertainties aim advance restoration, promoting integrity strengthening resilience important environments.

Language: Английский

Citations

0
Migratory patterns and seasonal habitat use of great hammerhead sharks (Sphyrna mokarran) in the southeastern United States DOI
Grace A. Casselberry, Gregory B. Skomal, Lucas P. Griffin

et al.

Journal of Fish Biology, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

The great hammerhead shark (Sphyrna mokarran) is a highly mobile species whose population in the United States declined dramatically through early 2000s. Their spatial ecology poorly understood, creating challenges for effective conservation of this enigmatic marine predator. Using acoustic telemetry and network analyses, we describe movement patterns 15 mature sharks (207-331.5 cm fork length) primarily within waters southeastern from April 2019 to December 2022, including identifying corridors, core use areas seasonal shifts habitat use. Great hammerheads exhibited partial migration; some undertook consistent, repeatable, round-trip migrations between tagging site Florida Keys northern points Gulf Mexico Atlantic coast. Conversely, others remained year-round. Network analysis coupled with community detection algorithms revealed that individual displayed oceanic basin affinity, favouring migration either Ocean or Mexico. shifted their seasonally inshore channels (spring summer) offshore artificial reefs natural reef tract (summer winter). These may be driven by prey availability, as often corresponded known locations spawning aggregations fish. data fill an important knowledge gap migratory can improve management strategies historically overexploited species. We discuss importance drawing upon multiple management, particularly designation essential fish habitat.

Language: Английский

Citations

0
Bridging knowledge gaps for the conservation and management of a ‘Data Deficient’, diadromous fish: the Indo-Pacific tarpon, Megalops cyprinoides DOI

Judith Das,

Ashna Shanmughan,

Neelesh Dahanukar

et al.

Marine and Freshwater Research, Journal Year: 2024, Volume and Issue: 75(10)

Published: July 5, 2024

Context The Indo-Pacific tarpon (Megalops cyprinoides) is a diadromous species, for which limited information available regarding demographics and exploitation levels. Aim We aimed to fill critical knowledge gaps on population dynamics levels of M. cyprinoides along the south-western coast India. Methods Structured length frequency-based models were used determine growth, mortality species. Key results Habitat-related variations in growth patterns found, with positive allometric marine (b = 3.208), negative freshwater (2.759) estuarine (2.876) habitats. Different estimates natural suggested high fishing pressure, potentially threatening long-term sustainability local populations. Conclusions This study provides first comprehensive demographic parameters cyprinoides, contributes significantly our required management fisheries. need address overfishing habitat degradation ensure populations highlighted. Implications Knowledge generated through this will help inform improved conservation assessments ‘Data Deficient’ addition informing development implementation plans.

Language: Английский

Citations

0
Repeatability of swimming activity of the Patagonian grouper Acanthistius patachonicus based on accelerometry DOI Creative Commons
Leonardo A. Venerus, Paolo Domenici, Stefano Marras

et al.

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

Published: Jan. 1, 2024

Abstract The study of repeatability in behaviour and activity level can be used to evaluate inter-individual differences, which are fundamental assess the resilience populations environmental variation. Previous work on wild fish has largely been based acoustic telemetry or mark-and-recapture revealed repeatable patterns over relatively long periods a number species. Although accelerometry is promising tool for investigating swimming wild, little known about accelerometry-based traits fish. Here, we external accelerometers investigate Patagonian grouper Acanthistius patachonicus, rocky-reef with high site fidelity, ensures recapture rate accelerometer tags. Accelerometry was short-term traits, including swimming, hovering, daily median tailbeat frequency, percentage frequency total tailbeats at different times year. We found that all variables scale four out five weekly periods. Overall, our suggests these individual-specific short time period investigated. In addition, spent hovering greater warm season compared cold season, suggesting higher levels related temperatures. These results suggest likely physiological state each individual. Finally, shows considered valuable explore differences potential applications assessing populations.

Language: Английский

Citations

0
The silver king in the Magic City: Observation of Atlantic tarpon Megalops atlanticus aggregation off Miami, Florida DOI Creative Commons
Julia Saltzman, Clare E. Hawkins, Catherine Macdonald

et al.

Journal of Fish Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

Abstract Due to the logistical and financial challenges in studying migratory marine species, there is relatively limited knowledge of reproductive biology, behavior, habitat use many ecologically important megafauna including Atlantic tarpon Megalops atlanticus . Here, we present a novel observation using consumer‐grade aerial drones observe, quantify scale of, classify behaviors within previously unreported aggregation ( N = 182) over course 2‐day fish event. After event, analysed compared observed (e.g., cruising clustering) with those other species well‐documented behaviors, revealing potentially consistent courtship, leading us believe this be possible spawning or reproductive/migratory significance. This occurred highly altered urbanized off coast South Florida, during winter, outside tarpon's reported spring summer season. Although few studies date have used monitor teleosts, study reinforces their potential value as tool for monitoring populations, movement.

Language: Английский

Citations

0