Publications
Peer reviewed publications:
Hartman, K.L., Chen, I., van der Harst, P.A., Moura, A.E., Jahnke, M., Pilot, M., Vilela, R. and Hoelzel, A.R. (2023). Kinship study reveals stable non-kin-based associations in a medium-sized delphinid. Behav Ecol Sociobiol 77, 137 (2023). DOI: https://doi.org/10.1007/s00265-023-03411-w
Hartman, K.L., van der Harst, P.A. and Vilela, R. (2023). Sex and sexual strategies in deep-diving Risso's dolphins. In: Sex in Cetaceans: Morphology, Behavior, and the Evolution of Sexual Strategies, pp. 279-306. Edited by: B. Würsig and D.N. Orbach. Springer, Cham. Doi: https://doi.org/10.1007/978-3-031-35651-3_13. Download pdf: Hartman et al. Sex and sexual strategies 2023
Ramos, E.A., Hartman, K.L., Baird, R.W., Lerma, J.K., Rodríguez-González, F.M. and Orbach, D.N. (2023). Drone perspectives on cetacean mating and sex. In: Sex in Cetaceans: Morphology, Behavior, and the Evolution of Sexual Strategies, pp. 225-249. Edited by: B. Würsig and D.N. Orbach. Springer, Cham. Doi: https://doi.org/10.1007/978-3-031-35651-3_11. Download pdf: Ramos et al. Drone perspectives 2023
Dinis, A., Molina, C., Tobeña, M., Sambolino, A., Hartman, K., Fernandez, M., et al. (2021). Large-scale movements of common bottlenose dolphins in the Atlantic: dolphins with an international courtyard. PeerJ 9:e11069. doi: 10.7717/peerj. 11069
Hartman, K.L., van der Harst, P.A. and Vilela, R. (2020).
Continuous focal group follows operated by a drone enable analysis of the relation between sociality and position in a group of male Risso’s dolphins (Grampus griseus). Front. Mar. Sci. 7:283. https://doi.org/10.3389/fmars.2020.00283.
Video abstract: https://vimeo.com/384551409
Renò, V., Losapio, G., Forenza, F., Politi, T., Stella, E., Fanizza, C., Hartman, K.L., Carlucci, R., Dimauro, G., Maglietta, R. (2020).
Combined color semantics and deep learning for the automatic detection of dolphin dorsal fins.
https://www.mdpi.com/2079-9292/9/5/758.
Maglietta, R., Renò, V., Caccioppoli, R., Seller, E., Bellomo, S., Santacesaria, F., Colella, R., Cipriano, G., Stella, E., Hartman, K.L., Fanizza, C., Dimauro, G. and Carlucci, R. (2020). Convolutional neural networks for Risso’s dolphins identification.
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9078758.
Alves, F., Alessandrini, A., Fernandez, M., Hartman, K.L. and Dinis, A. (2019). Home sweet home? Wide-ranging movements of socially stable resident delphinids (Globicephala macrorhynchus). Scientia Insularum, Journal of Island Sciences.
Alves, F., Alessandrini, A., Servidio, A., Mendonça, A. S., Hartman, K.L., Prieto, R.,Berrow, S., Magalhães, S., Steiner, L., Santos, R., Ferreira, R., Pérez, J. M., Ritter, F., Dinis, A., Martín, V., Silva, M. and de Soto, N. A. (2018). Complex biogeographical patterns support an ecological connectivity network of a large marine predator in the north-east Atlantic. Diversity and Distributions, DOI:10.1111/ddi.12848.
Chen, I., Nishida, S., Chou, L-S., Taijma, Y., Tang, W-C., Isobe, T., Yamada, T.K., Hartman, K.L. and Hoelzel, A.R. (2018).
Concordance between genetic diversity and marine biogeography in a highly mobile marine mammal, the Risso’s dolphin. Journal of Biogeography, 45 (9) 2092-2103.
Hartman, K.L. (2018). Risso’s dolphin, Grampus griseus, In: The Encyclopedia of Marine Mammals; pp 824-827. Edited by: B. Würsig, K. Kovacs and J.G.M. Thewissen. Academic Press, San Diego, CA. pp 1156.
Hartman, K.L., Wittich, A., Cai, J.J., van der Meulen, F. and Azevedo, J. M.N. (2016). Estimating the age of Risso’s dolphins (Grampus griseus) based on skin appearance. Journal of Mammology. 97 (2): 490-502.
Download pdf: Hartman et al. Age Method 2016
Hartman, K.L., Fernandez, M., Wittich, A. and Azevedo, J.M.N. (2015b). Sex differences in residency patterns of Risso’s dolphins (Grampus griseus) in the Azores: causes and management implications. Marine Mammal Science, 31(3): 1153–1167.
Download pdf: Hartman et al. Sex differences 2015
Hartman, K.L., Fernandez, M. and Azevedo J.M.N. (2014). Spatial segregation of calving and nursing Risso's dolphins (Grampus griseus) in the Azores, and its conservation implications. Marine Biology, 161(6): 1419-1428.
Download pdf: Hartman et al. Spatial segregation 2014
Hartman, K.L. (2014) “Patterns of social ecology of Risso’s dolphins (Grampus griseus) off Pico Island, Azores”.
Doctoral dissertation, University of the Azores. pp 172.
Visser, F., Hartman, K.L., Pierce. G.J., Valavanis V.D.S. and Huisman, J. (2011). Migration of baleen whales in relation to the North Atlantic spring bloom. Marine Ecology Progress Series, Vol.440: 267–279.
Download pdf: Visser et al Migration of baleen whales 2011
Visser, F., Hartman, K.L., Rood, E. J.J., Hendriks, A. J. E., Zult, D. B., Wolff, W. J., Huisman, J. and Pierce, G.J. (2011). Risso’s dolphin (Grampus griseus) alters daily resting pattern in response to whale watching at the Azores. Marine Mammal Science, 27(2): 366–381.
Download pdf: Visser et al Azores 2011
Hartman, K.L., Visser, F. and Hendriks A. J. E. 2008. Social structure of Risso's dolphins (Grampus griseus) at the Azores: a stratified community based on highly associated social units. Canadian Journal of Zoology 86(4): 294-306, April.
Download pdf: Hartman et al Gg Azores 2008
Non peer-reviewed publications:
Hartman, K.L., Annual Report Fieldwork Nova Atlantis 2018
Hartman, K.L., Annual Report Fieldwork Nova Atlantis 2017
Hartman, K.L., Annual Report Fieldwork Nova Atlantis 2016
Hartman, K.L., Annual Report Fieldwork Nova Atlantis 2015
Chen, I., Hartman, K.L., Simmonds, M, Wittich., A, Wright, A.J. (eds.), 2013. Grampus griseus 200th anniversary: Risso’s dolphins in the contemporary world. Proceedings from the European Cetacean Society Conference Workshop, Galway, Ireland. European Cetacean Society Special Publication Series No 54.
Hartman, K.L., Wittich., A. and Azevedo, J.M.N. 2012 . Show me your body and I tell you how old you are: A non-invasive method to define 6 life history- classes in Risso’s dolphins (Grampus griseus) using an identified trial population in the Atlantic. In: European Cetacean Society Special Publication Series 54: 69-88.
Hartman, K.L., and Azevedo, J.M.N. 2010.Biopsy report for Licenca 75/2009/DRA.
Hartman, K.L., Casthilo, R. and Azevedo, J.M.N. 2009. Biopsy report for Licenca 75/2008/DRA.
Fernandez, M., Oviedo, L., Hartman, K.L., Sousa, B. and Azevedo, J.M.N. 2009. Differences in spatial distribution of two small delphinids (Delphinus delphis and Stenella frontalis) intwo islands of the Azores Archipelago. Reports of the International Whaling Commission: SC/61/SC8, May.
Visser, F., Hartman, K.L., Rood, E.J.J., Hendriks, A.J.E. and Wolff, W.J. 2006. Effects of whale watching activities on Risso’s dolphin resting behaviour at the Azores. IWC report SC/58 of the sub-committee on whale watching.
Hartman, K.L. & Visser F. 2006. The case of the Risso's dolphin: Sustainable management in a critical habitat. Summary report Symposium 30 May, Faial Island.
Hartman, K.L., Visser F., Hendriks, A.J.E. and Wolff W.J. 2006. Summary Results Nova Atlantis Foundation 2005: Cetacean habitat model Azores, Risso Project and the Effects of whale watching activities. Annual Report for the Department of Ambient, Faial Island.
Hartman, K.L., Visser F., Hendriks, A.J.E. and Wolff W.J. 2005. Project Results 2003/2004, Nova Atlantis Foundation. Annual Report for the Department of Ambient, Faial Island.
Hartman, K.L., Visser F., Hendriks, A.J.E. and Wolff W.J. 2004. "Cetacean research results April/October 2003 off the south coast of Pico, Azores". Annual Report for the Department of Ambient, Faial Island.
Hartman, K.L., Visser F., Hendriks, A.J.E. and Wolff W.J. 2004. The Ocean Watch Project: A suggestion to regulate the commercial influence on cetaceans around the Azores. Annual Report for the Department of Ambient, Faial Island.
Oral presentations in international and local conferences:
Hartman, K.L., van der Harst, P.A. and Vilela, R. (2019). Male Risso’s dolphins (Grampus griseus) maintain a multi-level network of intra-alliance associations. In: World Marine Mammal Conference 2019, Barcelona.
Libotte, J., Christiansen, F., Cosentino, M., Cecchetti, A. and Hartman, K.L. (2019). Effect of whale-watching vessels on Risso's dolphins’ behaviour off Pico Island (Azores). In: World Marine Mammal Conference 2019, Barcelona.
Hartman, K.L. (2019). Risso’s dolphin behaviour and social structure: How to crack the Grampus Rosetta Stone? In: “Keep On Gramping 2.0” Workshop. In: World Marine Mammal Conference 2019, Barcelona.
Alves, F., Alessandrini, A. Servidio, A., Mendonça, S., Ferreira, R., Fernandez, M., Hartman, K. L.,Magalhães, S., Berrow, S., Prieto, R., Dinis, A., Martín, V., Silva, M. and de Soto, N. A. (2018). Biogeographical patterns of short-finned pilot whales in the Northeast Atlantic: in the search of an optimal habitat. In: 32nd Conference of the European Cetacean Society, La Spezia, Italy.
Molina, C., Sambolino, A., Tobeña, M., de Soto, N. A., Hartman, K.L., Fernandez, M., Martín, V., Alves, F. and Dinis, A. (2017). Preliminary assessment of connectivity of bottlenose dolphins (Tursiops truncatus) within the Macaronesia region (NE Atlantic). In: Conference of the Cetacean Spanish Society, Spain.
Hartman, K.L., Fernandez, M., Wittich, A. and Azevedo J.M.N. 2014
The place to be?” Temporal and spatial residency patterns of Risso’s dolphins off Pico Island. In: 28th Annual Conference of the European Cetacean Society. Liege, Belgium.
Hartman, K.L., Fernandez, M. and Azevedo J.M.N. 2013. Spatial segregation of calving and nursing Risso's dolphins (Grampus griseus)in the Azores, and its conservation implications. Conhecer o Mar dos Açores- fórum científico de apoio à decisão” Biblioteca Pública e Arquivo Regional João José da Graça.
Hartman, K.L. 2012. Long term monitoring of Risso's dolphins in the Azores: results, present work and future steps. Workshop Grampus griseus 200th anniversary: Risso’s dolphins in the contemporary world. Held at the European Cetacean Society Conference, Galway, Ireland.
Hartman, K.L. 2011. Long term monitoring of Risso's dolphins in the Azores: results, implications for management and future steps.” Conhecer o Mar dos Açores- fórum científico de apoio à decisão. Biblioteca Pública e Arquivo Regional João José da Graça.
Simiao, S; Hartman, K.L.; Hendriks, A.J.E., Visser, F. and Azevedo J. 2008. Residency patterns of bottlenose dolphins (Tursiops truncates) off Pico island, Azores. In: 22nd Annual Conference of the European Cetacean Society. Egmond aan Zee, The Netherlands.
Visser, F., Hartman, K.L. and Hendriks, A.J.E. 2007. Land observations at the Azores: efficient tool for management. In: 21st Annual Conference of the European Cetacean Society. San Sebastian, Spain.
Visser, F.,Hartman, K.L., Rood, E.J.J., Hendriks, A.J.E. and Wolff, W.J. 2006. Effects of whale watching activities on Risso’s dolphin resting behaviour at the Azores. In: 20th Annual Conference of the European Cetacean Society. Gdynia, Poland.
Poster presentations:
Maglietta, R., Fanizza, C., Cipriano, G., Hartman, K.L., Nitti, M., Dimauro, G.,Bellomo, S., Santacesaria, F.C., Stella, E., Carlucci. R. and Renò, V. (2019). Application of Artificial Intelligence to the photo-identification of common bottlenose and Risso’s dolphins. In: World Marine Mammal Conference 2019, Barcelona.
Steiner, L., Estrela, G., Hartman, K.L. and Van der Linde, M. (2019). First insights into the ecology of false killer whales observed in the Azores. In: World Marine Mammal Conference 2019, Barcelona.
Martin, S.M., Rotondi, C., Taylor, E., Mészáros, N. and Hartman, K.L. (2019). Long-term cetacean population presence and abundance in relation to moon cycles off Pico Island (Azores). In: World Marine Mammal Conference 2019, Barcelona.
Martins, R., González García, L. and Hartman, K.L. (2019). Residency patterns of Risso’s dolphins off São Miguel and inter-island matches with Pico Island (Azores). In: World Marine Mammal Conference 2019, Barcelona.
Molina, C., Tobeña, M; Sambolino, A; Hartman, K.L.,Fernandez, M., Martín, V., de Soto, N. A., Alves, F. and Dinis, A. (2018). Large-scale movements of bottlenose dolphins (Tursiops truncatus) within the Macaronesia (NE Atlantic): dolphins with an international playground. In: 32nd Conference of the European Cetacean Society, La Spezia.
Alessandrini, A., Dinis, A., Fernandez, M., Hartman, K. L. and Alves, F. (2017). Large-scale movement of a resident group of short-finned pilot whales in Macaronesia. In: 22nd Biennial Conference on the Biology of Marine Mammals, Halifax, Canada.
Cucuzza M.; Hartman, K.L., Olio, M., Peres Santos, R., Steiner, L., Stevick, P.T., van der Linde, M. and Villa, E. 2015. The Azores Constitute a Migratory Stopover for Humpback Whales in the North Atlantic Ocean. In: 21st Biennial Conference of the Society for Marine Mammalogy. San Fransico, United States of America.
Stap, Tim van der.,Hartman, K.L., Wittich, A., Azevedo, J. M.N. and Heitkönig, I. M.A. 2013. Data analysis model selection for estimating local population size of the Risso’s dolphin (Grampus griseus) in the Azores. In: 27th Annual Conference of the European Cetacean Society. Setubal, Portugal.
Niemeijer, S. C., Libotte, J., Hartman, K.L., Steiner, L. and Azevedo, J. M.N. 2013. Presence of sperm whales (Physeter macrocephalus) around the Azores: A study of re-sightings off the South of Pico from 2003-2012. In: 27th Annual Conference of the European Cetacean Society. Setubal, Portugal.
Fernández, M., Hartman, K.L., and Azevedo J.M.N. 2012. Habitat differentiation between groups of Risso's dolphins as evidence of coastal nursery areas. In: 26th Annual Conference of the European Cetacean Society, Galway, Ireland.
Hartman, K.L., Wittich, A., Neves, D. and Azevedo, J.M.N. 2011. Behavioural responses of Risso’s dolphin, Grampus griseus, to remote biopsy sampling. In: 25th Annual Conference of the European Cetacean Society, Cadiz, Spain.
Cosentino,A. & Hartman, K.L. 2011. First resighting of killer whales (Orcinus orca) off the Azores Archipelago. In: 25 th Annual Conference of the Europen Cetacean Society, Cadiz, Spain.
Cosentino, A., Hartman, K.L., Weilermann, D., Garcia, L.G. and Visser, F. 2010. Spatial and temporal distribution of Hyperoodon ampullatus off Pico Island, Azores.
In: 24 th Annual Conference of the Europen Cetacean Society, Stralsund, Germany.
Weilermann, D., Hartman, K.L., Cosentino,A., Garcia, L.G. and Visser F. 2010. First ID Cataloque of Northern bottlenose whales Hyperoodon ampullatus off Pico island, Azores. In: 24 th Annual Conference of the Europen Cetacean Society, Stralsund, Germany.
Hartman, K.L., Geelhoed, S., Visser, F. and Azevedo J. N. 2009. Temporal residency patterns of Risso’s dolphins (Grampus griseus) off Pico island. In: 18th Biennial Conference of the Society for Marine Mammalogy. Quebec City, Canada.
Hartman, K.L., Visser, F. and Hendriks A.J.E. 2008 . 2008. Social structure of Risso's dolphins (Grampus griseus) at the Azores: a stratified community based on highly associated social units. In: 22nd Annual Conference of the European Cetacean Society. Egmond aan Zee, The Netherlands.
Van Geel, N., Visser, F., Hartman, K.L., Hendriks, A.J.E. and Huisman, J. 2008. Spatial analyses of cetacean distribution off the south coast of Pico (Azores, Portugal) in relation to water depth and slope gradient. In: 22nd Annual Conference of the European Cetacean Society. Egmond aan Zee, The Netherlands.
Visser, F., Hartman, K.L., and Hendriks, A.J.E. 2008. Stepping stones Azores: Baleen whale feeding ground during migration over North Atlantis Ocean. In: 22nd Annual Conference of the European Cetacean Society. Egmond aan Zee, The Netherlands.
Simiao, S., Hartman, K.L., Hendriks, A.J.E., Visser, F. and Azevedo J.N. 2008. Residency patterns of bottlenose dolphins (Tursiops truncates) off Pico island, Azores. In: 22nd Annual Conference of the European Cetacean Society. Egmond aan Zee, The Netherlands.
Lindeyer, C. M., Hartman, K.L., Visser, F., Hendriks, A.J.E. and Van Dooren, T.M. 2007. Temporal patters of distribution of bottlenose dolphins (Tursiops truncates) off the south coast of Pico island, Azores. In: 21st Annual Conference of the European Cetacean Society. San Sebastian, Spain.
Oudejans, M., Visser, F., Hartman, K.L., and Hendriks, A.J.E. 2007. High whale watching vessel abundance affects the daily resting patters of Risso’s dolphin. In: 21st Annual Conference of the European Cetacean Society. San Sebastian, Spain.
Visser, F., Hartman, K.L., and Hendriks, A.J.E. 2007.
Land observations at the Azores: efficient tool for management. In: 21st Annual Conference of the European Cetacean Society. San Sebastian, Spain.
Visser, F., Hartman, K.L., Rood, E.J.J., Hendriks, A.J.E. and Wolff, W.J. 2006. Effects of whale watching activities on Risso’s dolphin resting behaviour at the Azores.
In: 20th Annual Conference of the European Cetacean Society. Gdynia, Poland.
Visser, F., Hartman, K.L., Hendriks, A.J.E. and Huisman. J. 2005. The Azorean waters: Critical foraging habitat for cetaceans in the central North Atlantic Ocean. In: 19th Annual Conference of the European Cetacean Society. La Rochelle, France.
Supervision of internships-research projects:
C. Rotondi, 2019-2020: “Long-term impact (2005-2019) of whale watching on Risso’s dolphin’s (Grampus griseus) activity budget off the south coast of Pico Island, Azores.” Master thesis, Parma University, Italy.
S.C. Martin, 2020: “Influence of environmental cycles on cetacean habitat use in the Azores 2005-2019.” Master thesis, Lund University, Sweden.
S.C. Martin, 2019: “Influence of environmental cycles on cetacean habitat use in the Azores 2011-2018.” Bachelor thesis, Van Hall-Larenstein University, The Netherlands
Gherardi, S, 2016. “Male-male home range overlap of Risso’s Dolphin (Grampus griseus) off Pico Island (Azores)”. MSc Endangered Species Recovery and Conservation thesis, Nottingham Trent University, England, 1-57.
J. Libotte, 2014: “Impact of whale-watching tour boats on the behaviour of Risso's dolphin population off Pico Island, Azores”. Master thesis. University of Paris 13, France.
D. Suijker, 2013: “Detailed insights in the functioning of the male Risso’s dolphins (Grampus griseus) reproduction strategies”. Master thesis, Wageningen University, The Netherlands
T. van der Stap, 2013: “Data analysis model selection for estimating local population size of the Risso’s dolphin (Grampus griseus) in the Azores . Master thesis, Wageningen University, The Netherlands
C. Neijmeijer, 2012: “Updating the Sperm Whale catalogue from Pico Island”, resulted in a poster presentation at ECS, internship for Hogeschool Den Bosch, The Netherlands.
B. Adam, 2011: “The social structure of Risso’s Dolphins (Grampus griseus) off the south coast of Pico Island, Azores”. Master thesis. University of Natural Resources and Life Sciences, Vienna, Austria.
P. Biekart, 2010: “Preliminary analysis of the spatial distribution of different group types of Grampus griseus off Pico Island, Azores”. Bachelor thesis, Hogeschool Zeeland, Vlissingen, The Netherlands.
M. Cosentino and D. Weileman, 2009: Two bachelor internships n, resulting in and updated identification catalogue for Northern bottlenose whales, Hyperoodon ampullatus, and 2 posters at ECS.
S. Simiao 2007: "Photo Identification of Bottlenose Dolphin (Tursiops truncatus) off the south coast of Pico, Azores". Bachelor thesis, University of the Azores, Biology Department.
F. Adamcyk, 2007: "The effect of whale watching boats on behavior of the Risso’s dolphin (Grampus griseus), Azores". Master thesis, University of Wageningen, The Netherlands .
N. van Geel, 2006: "Spatial and temporal analyses of cetacean distribution off the south coast of Pico (Azores, Portugal) in relation to the`bathymetric features water depth and slope gradient". Master thesis, Utrecht University-University of Amsterdam, The Netherlands.
C. Lindeyer, 2006: "Temporal patters of distribution of bottlenose dolphins (Tursiops truncates) off the south coast of Pico island, Azores.". Master thesis, University of Leiden, The Netherlands.
M. Oudejans, 2005: "The effect of whale watching on Risso's dolphins: Behavioral differences between male and mother groups." Master thesis, international MSc program ‘Limnology & Oceanography’, University of Amsterdam, The Netherlands.
M.de Ruyter, 2005: "Photo identification and the set up of a ID-Catalogue of the bottlenose dolphins (Tursiops truncatus) off Pico island." Bachelor degree Van Hall Institute/University of Wageningen, The Netherlands.
E. Rood, 2004: "Risso's Resilience in a Disturbed environment: alterations of the short term behaviour of the Risso's dolpin (Grampus griseus), in response to whale watching activities in the Bay of Ribeiras, Pico, the Azores". Master thesis, international MSc program ‘Limnology & Oceanography’, University of Amsterdam, The Netherlands.
R. Hensgens, 2004: "Photo Identification of the Risso's dolphin (Grampus griseus) off the south coast of Pico, Azores". Bachelor degree, VU, University of Amsterdam The Netherlands
F. Visser, 2003: "Social structure and behavioral patterns of the Risso's dolphin (Grampus griseus) off the south coast of Pico, Azores". Master thesis, international MSc program ‘Limnology & Oceanography’, University of Amsterdam, The Netherlands.