Advanced image recognition: a fully automated, high-accuracy photo-identification matching system for humpback whales

Mammalian Biology, Journal Year: 2021, Volume and Issue: 102(3), P. 915 - 929

Published: Dec. 7, 2021

Language: Английский

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Individual identification and photographic techniques in mammalian ecological and behavioural research—Part 2: Field studies and applications

Mammalian Biology, Journal Year: 2022, Volume and Issue: 102(4), P. 1047 - 1054

Published: Aug. 1, 2022

Language: Английский

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Broad-scale impacts of coastal mega-infrastructure project on obligatory inshore delphinids: A cautionary tale from Hong Kong

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 920, P. 169753 - 169753

Published: Jan. 3, 2024

Language: Английский

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Population parameters and heterogeneity in survival rates of Indo-Pacific humpback dolphins in a heavily urbanized coastal region of southeast China: implications for conservation

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: March 20, 2024

The Pearl River Delta (PRD) region on the southeast coast of China is among largest and most populated metropolitan regions world, subjecting Indo-Pacific humpback dolphins ( Sousa chinensis ) inhabiting coastal waters this – apparently population species to intense anthropogenic pressure. In 5-year study (2011-2015), we applied mark-recapture techniques quantify parameters in main body extensive estuarine system River, Lingding Bay (LB), urbanized industrialized part PRD. super-population size was estimated at 928 individuals (95% CI=823-1046), which however over-represents latest number extant animals. Annual estimates fluctuated between 708 750 dolphins, likely reflect accurately latest/current LB. Both overall annual generated by our are considerably lower than previously published abundance estimates. Apparent survival rates were generally low, 0.943 (SE = 0.008, 95% CI 0.929-0.958) 0.815 0.025, 0.766-0.866) for adults juveniles, respectively. conjunction with limited recruitment, they may have led a substantial decline numbers over past two decades. Notably, exhibited heterogeneous apparent across complex seascape Adult that use Hong Kong as their primary habitat 6.2% higher those other parts This difference tripled (19.2%) expression susceptibility environmental and/or stresses. We suggest largely due stressors vary spatially estuary, loss, pollution, declining prey resources appear be threats. Based findings, call strategic conservation planning highest priority given preserve remaining key dolphin habitats waters, mitigate impacts major stressor(s) Guangdong (mainland China) waters. Given encroachment ever-more-intense human activities understanding demographic response underlying mechanisms processes prove instrumental formulation management strategy can secure continuous survival.

Language: Английский

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Drone-based photogrammetry assessments of body size and body condition of Antillean manatees

Mammalian Biology, Journal Year: 2022, Volume and Issue: 102(3), P. 765 - 779

Published: April 18, 2022

Language: Английский

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A collaborative and near-comprehensive North Pacific humpback whale photo-ID dataset

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: June 23, 2023

We present an ocean-basin-scale dataset that includes tail fluke photographic identification (photo-ID) and encounter data for most living individual humpback whales (Megaptera novaeangliae) in the North Pacific Ocean. The was built through a broad collaboration combining 39 separate curated photo-ID catalogs, supplemented with community science data. Data from throughout were aggregated into 13 regions, including six breeding feeding one migratory corridor. All images compared minimal pre-processing using recently developed image recognition algorithm based on machine learning artificial intelligence; this system is capable of rapidly detecting matches between individuals estimated 97-99% accuracy. For 2001-2021 study period, total 27,956 unique documented 157,350 encounters. Each encountered, average, 5.6 sampling periods (i.e., seasons), annual average 87% encountered more than season. combined tool represents accessible resource collaborative, basin-wide studies keystone marine mammal time rapid ecological change.

Language: Английский

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The potential for acoustic individual identification in mammals

Mammalian Biology, Journal Year: 2022, Volume and Issue: 102(3), P. 667 - 683

Published: March 31, 2022

Language: Английский

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Indo-Pacific humpback dolphins face extirpation in Shantou waters

Regional Studies in Marine Science, Journal Year: 2024, Volume and Issue: 77, P. 103641 - 103641

Published: June 15, 2024

Language: Английский

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Adapting photo-identification methods to study poorly marked cetaceans: a case study for common dolphins and harbor porpoises

Mammalian Biology, Journal Year: 2022, Volume and Issue: 102(3), P. 811 - 827

Published: April 5, 2022

Language: Английский

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The longest recorded movement of an inshore common bottlenose dolphin (Tursiops truncatus)

Mammalian Biology, Journal Year: 2022, Volume and Issue: 102(4), P. 1469 - 1481

Published: Aug. 1, 2022

Abstract Information on movements and connectivity among populations of animals is important for the delineation units to conserve, so that demographic parameters, such as abundance, fecundity mortality, can be placed in an appropriate population conservation context. Common bottlenose dolphins ( Tursiops truncatus ) are often considered relatively ‘resident’ demonstrating strong site fidelity specific areas. However, this perception may partly artefact distribution ‘habitat use’ cetacean researchers, rather than themselves, have been shown capable substantial movements, short periods time. Here, we report two long-distance a common dolphin within Mediterranean Sea, across Tyrrhenian, Ionian Adriatic Seas, subsequently back all three seas Ligurian making these longest recorded movement species Sea date some world. We also review published records worldwide. This study highlights utility photo-identification importance regional data sharing. argue comparisons always worthwhile results informative regardless presence or absence matches, especially with ongoing advances automated matching software.

Language: Английский

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