Individual identification and photographic techniques in mammalian ecological and behavioural research—Part 1: Methods and concepts

Karczmarski, Leszek; Chan, Stephen C. Y.; Rubenstein, Daniel I.; Chui, Scott Y. S.; Cameron, Elissa Z.

doi:10.1007/s42991-022-00319-2

Cited by 25 publications

(6 citation statements)

References 47 publications

(43 reference statements)

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“…The existing and ongoing advances in automated matching software (such as the finFindR package used here) may facilitate the exchange and matching of catalogues in the future. Photo-ID matching is a labour-intensive and time-consuming endeavour, but automated approaches (see Karczmarski et al 2022 for several examples) can potentially eliminate some of the common obstacles to efficient data sharing by making the process easier and more time-efficient.…”

mentioning

confidence: 99%

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

Genov

Železnik²,

Bruno

et al. 2022

Mamm Biol

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

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mentioning

confidence: 99%

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

Genov

Železnik²,

Bruno

et al. 2022

Mamm Biol

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“…This enables population modeling, revealing movement patterns, social interactions, and reproductive success rates. Photo-ID, in which a photograph of persistently identifiable features of an individual is recorded together with its date and location, offers an efficient and non-invasive data collection method 1 . For long-lived migratory species, effective population studies require extensive data collection, including the additional challenges of collaboration across regional and international boundaries.…”

Section: Introductionmentioning

confidence: 99%

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

Cheeseman

Southerland²,

Acebes³

et al. 2023

Sci Rep

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

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“…It is also apparent that even though the digital technology is fast advancing and so is in parallel the accuracy and effectiveness of fully automated systems for animal individual identification (e.g., see several examples in Part 1 of this Special Issue, Karczmarski et al 2022a), many research teams continue processing their photo-ID data manually or with assistance of semi-automated systems, and with only limited use of dedicated database management programmes for archiving and managing their photo-ID and associated data (see also Chan et al 2022a). On the other hand, some research teams use automated systems but chose the photo-ID software either arbitrarily or simply by following similar applications in other published studies, with little consideration of the specifics of their own research or the characteristics of the studied species.…”

Section: Editorial Introduction To Partmentioning

confidence: 99%

“…Motivated by notable recent developments in field and analytical techniques and the continuous advances in individual-based studies across a wide range of taxa, this Special Issue of Mammalian Biology presents a thematic collection of papers that demonstrate the diversity of research topics and conceptual applications of individual identification and/ or photographic techniques in mammalian field studies. Part 1 of this Special Issue (Karczmarski et al 2022a) offers an overview of current methodology, from novel concepts and methodological innovations (both analytical and field applications), to recent advances in automated individual identification systems, platforms for data integration and management, to hands-on protocol of performing individual identification by photographic and other means. Part 2 of this thematic collection-with its 35 papers (Karczmarski et al 2022b)-presents reviews and original case studies grouped into seven thematic sections: Review (3 articles), Demography and Population Ecology (8 articles), Socio-Ecology and Behaviour (8 articles), Socio-and Morpho-Genetics (3 articles), Movement and Site Fidelity (5 articles), Photogrammetry and Morphometrics (4 articles), and Health Assessment (4 articles).…”

Section: Editorial Introduction To Partmentioning

confidence: 99%

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

et al. 2022

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Individual identification and photographic techniques in mammalian ecological and behavioural research—Part 1: Methods and concepts

Cited by 25 publications

References 47 publications

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

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

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

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

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