Search

Your search keyword '"Bowlby, Heather D."' showing total 21 results
Start Over Author "Bowlby, Heather D." Publication Year Range Last 10 years
21 results on '"Bowlby, Heather D."'

1. Global habitat predictions to inform spatiotemporal fisheries management: Initial steps within the framework

Author

Bowlby, Heather D., Druon, Jean-Noël, Lopez, Jon, Juan-Jordá, Maria José, Carreón-Zapiain, María Teresa, Vandeperre, Frederic, Leone, Agostino, Finucci, Brittany, Sabarros, Philippe S., Block, Barbara A., Arrizabalaga, Haritz, Afonso, Pedro, Musyl, Michael K., Coelho, Rui, Cortés, Enric, Cardoso, Luis Gustavo, Mourato, Bruno, Queiroz, Nuno, Fontes, Jorge, Abascal, Francisco J., Zanzi, Antonella, Hazin, Humberto Gomes, Bach, Pascal, Sims, David W., and Travassos, Paulo

Published
2024
Full Text
View/download PDF

3. Conservation implications of white shark (Carcharodon carcharias) behaviour at the northern extent of their range in the Northwest Atlantic

Author

Bowlby, Heather D., Joyce, Warren N., Winton, Megan V., Coates, Peterson J., and Skomal, Gregory B.

Subjects
Atlantic Provinces -- Natural resources, White shark -- Protection and preservation -- Distribution -- Behavior, Company distribution practices, Earth sciences
Abstract

Assessing progress for the endangered white shark (Carcharodon carcharias) relative to Canadian conservation objectives requires understanding distribution patterns. From the largest tagging data set in the Northwest Atlantic (2010-2020; 272 deployments), we determined the proportion of the population detected in Canadian waters, characterized patterns in occupancy, and explored the behavioural characteristics of animals while in Canadian waters versus elsewhere in their range. The component of the population detected in Canadian waters annually was highly variable, yet proportionately small. Juveniles and subadults were 4.7 and 3.4 times more likely, respectively, to move northward than adults. From June to November, all pop-up satellite archival tagged white sharks remained primarily in coastal locations within the 200 m bathymetric contour and exhibited shallow diving behaviour within the top 100 m of the water column. However, individuals in Canadian waters experienced a more restricted temperature range and used proportionately less of the water column. Accounting for behavioural effects on distribution when predicting habitat use from environmental associations will become critical to evaluate the population-level impact of recovery actions implemented under Canadian legislation. Key words: conservation, telemetry, white shark, distribution, dive behaviour, Northwest Atlantic L'evaluation des progres en ce qui concerne le grand requin blanc (Carcharodon carcharias), une espece en voie de disparition, par rapport aux objectifs de conservation canadiens necessite une comprehension de ses motifs de repartition. A la lumiere du plus important ensemble de donnees de marquage pour l'Atlantique Nord-Ouest (2010-2020, 272 deploiements), nous avons determine la proportion de la population detectee dans les eaux canadiennes, caracterise les motifs d'occupation et compare les caracteristiques comportementales d'individus alors qu'ils etaient presents en eaux canadiennes et ailleurs dans leur aire de repartition. La composante de la population detectee en eaux canadiennes annuellement est tres variable, bien que proportionnellement faible. Les juveniles et subadultes sont, respectivement, 4,7 et 3,4 fois plus susceptibles de se deplacer vers le nord que les adultes. De juin a novembre, tous les requins blancs dotes d'etiquettes satellites autodetachables a archivage demeurent principalement dans des sites littoraux a l'interieur de la courbe bathymetrique de 200 m et presentent un comportement de plongee peu profonde dans les 100 premiers metres de la colonne d'eau. Les individus dans les eaux canadiennes sont cependant exposes a une fourchette de temperatures plus restreinte et utilisent une moins grande proportion de la colonne d'eau. La prise en compte d'effets comportementaux sur la repartition dans la prediction de l'utilisation d'habitats a partir d'associations environnementales sera d'importance cle pour l'evaluation de l'incidence a l'echelle des populations de mesures de retablissement mises en oeuvre en vertu de la legislation canadienne. [Traduit par la Redaction] Mots-cles : conservation, telemetrie, grand requin blanc, repartition, comportement de plongee, Atlantique Nord- Ouest, Introduction Abiotic conditions are considered to be the predominant factors shaping pelagic shark distributions, where modeling typically uses water temperature or related characteristics of the water column to describe or [...]

Published
2022
Full Text
View/download PDF

6. First insights into the vertical habitat use of young porbeagles in the north-western Atlantic with implications for bycatch reduction strategies.

Author

Anderson, Brooke N., Bowlby, Heather D., Saul, Steven, Kang, Yun, Hammerschlag, Neil, Natanson, Lisa J., and Sulikowski, James A.

Abstract

Context: For threatened marine species, data on their vertical habitat use patterns can reveal risk of interactions with fishing gear and can inform bycatch avoidance strategies. Such data are lacking for young porbeagles (Lamna nasus), which are captured as bycatch in north-western Atlantic fisheries. Aims: We aimed to examine temporal patterns in diving and characterise vertical habitat use of young porbeagles during summer and autumn. Methods: We used data from short-term (28-day), high-resolution (5-min interval) pop-off satellite tags attached to 14 young (young-of-the-year and 1-year-old) porbeagles to model depth use. Key results: Occupied depths ranged from the sea surface to 679 m, with ambient water temperatures of −0.2 to 26°C. Diel period and season were factors related to depth use. Conclusions: Sharks exhibited a diel activity pattern characterised by more extensive use of the water column during the day while remaining primarily at the surface at night. Depth use differed between seasons, with summer characterised by greater affinity for surface waters (0–10 m) compared to autumn. Implications: Young porbeagles are at risk of interaction with active fisheries on the continental shelf, but interactions may be reduced by setting gear deeper at night or during summer. The depth use of young porbeagles was investigated for the first time during the summer and autumn in the north-western Atlantic. Depth use varied on both daily and seasonal scales, with sharks occupying surface waters during the night and summer, and diving deeper during the day and autumn. Results can inform bycatch reduction strategies for this vulnerable life stage. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

7. Using reproductive hormones extracted from archived muscle tissue to assess maturity and reproductive status in porbeagles Lamna nasus

Author

Anderson, Brooke N., primary, Kaloczi, Juliana, additional, Holden, Courtney, additional, Einig, Amanda, additional, Donaldson, Linda, additional, Malone, Hunter, additional, Passerotti, Michelle S., additional, Natanson, Lisa J., additional, Bowlby, Heather D., additional, and Sulikowski, James A., additional

Published
2023
Full Text
View/download PDF

10. Diving into the vertical dimension of elasmobranch movement ecology

Author

Andrzejaczek, Samantha, primary, Lucas, Tim C.D., additional, Goodman, Maurice C., additional, Hussey, Nigel E., additional, Armstrong, Amelia J., additional, Carlisle, Aaron, additional, Coffey, Daniel M., additional, Gleiss, Adrian C., additional, Huveneers, Charlie, additional, Jacoby, David M. P., additional, Meekan, Mark G., additional, Mourier, Johann, additional, Peel, Lauren R., additional, Abrantes, Kátya, additional, Afonso, André S., additional, Ajemian, Matthew J., additional, Anderson, Brooke N., additional, Anderson, Scot D., additional, Araujo, Gonzalo, additional, Armstrong, Asia O., additional, Bach, Pascal, additional, Barnett, Adam, additional, Bennett, Mike B., additional, Bezerra, Natalia A., additional, Bonfil, Ramon, additional, Boustany, Andre M., additional, Bowlby, Heather D., additional, Branco, Ilka, additional, Braun, Camrin D., additional, Brooks, Edward J., additional, Brown, Judith, additional, Burke, Patrick J., additional, Butcher, Paul, additional, Castleton, Michael, additional, Chapple, Taylor K., additional, Chateau, Olivier, additional, Clarke, Maurice, additional, Coelho, Rui, additional, Cortes, Enric, additional, Couturier, Lydie I. E., additional, Cowley, Paul D., additional, Croll, Donald A., additional, Cuevas, Juan M., additional, Curtis, Tobey H., additional, Dagorn, Laurent, additional, Dale, Jonathan J., additional, Daly, Ryan, additional, Dewar, Heidi, additional, Doherty, Philip D., additional, Domingo, Andrés, additional, Dove, Alistair D. M., additional, Drew, Michael, additional, Dudgeon, Christine L., additional, Duffy, Clinton A. J., additional, Elliott, Riley G., additional, Ellis, Jim R., additional, Erdmann, Mark V., additional, Farrugia, Thomas J., additional, Ferreira, Luciana C., additional, Ferretti, Francesco, additional, Filmalter, John D., additional, Finucci, Brittany, additional, Fischer, Chris, additional, Fitzpatrick, Richard, additional, Forget, Fabien, additional, Forsberg, Kerstin, additional, Francis, Malcolm P., additional, Franks, Bryan R., additional, Gallagher, Austin J., additional, Galvan-Magana, Felipe, additional, García, Mirta L., additional, Gaston, Troy F., additional, Gillanders, Bronwyn M., additional, Gollock, Matthew J., additional, Green, Jonathan R., additional, Green, Sofia, additional, Griffiths, Christopher A., additional, Hammerschlag, Neil, additional, Hasan, Abdi, additional, Hawkes, Lucy A., additional, Hazin, Fabio, additional, Heard, Matthew, additional, Hearn, Alex, additional, Hedges, Kevin J., additional, Henderson, Suzanne M., additional, Holdsworth, John, additional, Holland, Kim N., additional, Howey, Lucy A., additional, Hueter, Robert E., additional, Humphries, Nicholas E., additional, Hutchinson, Melanie, additional, Jaine, Fabrice R. A., additional, Jorgensen, Salvador J., additional, Kanive, Paul E., additional, Labaja, Jessica, additional, Lana, Fernanda O., additional, Lassauce, Hugo, additional, Lipscombe, Rebecca S., additional, Llewellyn, Fiona, additional, Macena, Bruno C. L., additional, Mambrasar, Ronald, additional, McAllister, Jaime D., additional, McCully Phillips, Sophy R., additional, McGregor, Frazer, additional, McMillan, Matthew N., additional, McNaughton, Lianne M., additional, Mendonça, Sibele A., additional, Meyer, Carl G., additional, Meyers, Megan, additional, Mohan, John A., additional, Montgomery, John C., additional, Mucientes, Gonzalo, additional, Musyl, Michael K., additional, Nasby-Lucas, Nicole, additional, Natanson, Lisa J., additional, O’Sullivan, John B., additional, Oliveira, Paulo, additional, Papastamtiou, Yannis P., additional, Patterson, Toby A., additional, Pierce, Simon J., additional, Queiroz, Nuno, additional, Radford, Craig A., additional, Richardson, Andy J., additional, Richardson, Anthony J., additional, Righton, David, additional, Rohner, Christoph A., additional, Royer, Mark A., additional, Saunders, Ryan A., additional, Schaber, Matthias, additional, Schallert, Robert J., additional, Scholl, Michael C., additional, Seitz, Andrew C., additional, Semmens, Jayson M., additional, Setyawan, Edy, additional, Shea, Brendan D., additional, Shidqi, Rafid A., additional, Shillinger, George L., additional, Shipley, Oliver N., additional, Shivji, Mahmood S., additional, Sianipar, Abraham B., additional, Silva, Joana F., additional, Sims, David W., additional, Skomal, Gregory B., additional, Sousa, Lara L., additional, Southall, Emily J., additional, Spaet, Julia L. Y., additional, Stehfest, Kilian M., additional, Stevens, Guy, additional, Stewart, Joshua D., additional, Sulikowski, James A., additional, Syakurachman, Ismail, additional, Thorrold, Simon R., additional, Thums, Michele, additional, Tickler, David, additional, Tolloti, Mariana T., additional, Townsend, Kathy A., additional, Travassos, Paulo, additional, Tyminski, John P., additional, Vaudo, Jeremy J., additional, Veras, Drausio, additional, Wantiez, Laurent, additional, Weber, Sam B., additional, Wells, R.J. David, additional, Weng, Kevin C., additional, Wetherbee, Bradley M., additional, Williamson, Jane E., additional, Witt, Matthew J., additional, Wright, Serena, additional, Zilliacus, Kelly, additional, Block, Barbara A., additional, and Curnick, David J., additional

Published
2022
Full Text
View/download PDF

11. Diving into the vertical dimension of elasmobranch movement ecology

Author

Andrzejaczek, Samantha, Lucas, Tim C.D., Goodman, Maurice C., Hussey, Nigel E., Armstrong, Amelia J., Carlisle, Aaron, Coffey, Daniel M., Gleiss, Adrian C., Huveneers, Charlie, Jacoby, David M. P., Meekan, Mark G., Mourier, Johann, Peel, Lauren R., Abrantes, Kátya, Afonso, André S., Ajemian, Matthew J., Anderson, Brooke N., Anderson, Scot D., Araujo, Gonzalo, Armstrong, Asia O., Bach, Pascal, Barnett, Adam, Bennett, Mike B., Bezerra, Natalia A., Bonfil, Ramon, Boustany, Andre M., Bowlby, Heather D., Branco, Ilka, Braun, Camrin D., Brooks, Edward J., Brown, Judith, Burke, Patrick J., Butcher, Paul A., Castleton, Michael, Chapple, Taylor K., Chateau, Olivier, Clarke, Maurice, Coelho, Rui, Cortes, Enric, Couturier, Lydie I. E., Cowley, Paul D., Croll, Donald A., Cuevas, Juan M., Curtis, Tobey H., Dagorn, Laurent, Dale, Jonathan J., Daly, Ryan, Dewar, Heidi, Doherty, Philip D., Domingo, Andrés, Dove, Alistair D. M., Drew, Michael, Dudgeon, Christine L., Duffy, Clinton A. J., Elliott, Riley G., Ellis, Jim R., Erdmann, Mark V., Farrugia, Thomas J., Ferreira, Luciana C., Ferretti, Francesco, Filmalter, John D., Finucci, Brittany, Fischer, Chris, Fitzpatrick, Richard, Forget, Fabien, Forsberg, Kerstin, Francis, Malcolm P., Franks, Bryan R., Gallagher, Austin J., Galvan-Magana, Felipe, García, Mirta L., Gaston, Troy F., Gillanders, Bronwyn M., Gollock, Matthew J., Green, Jonathan R., Green, Sofia, Griffiths, Christopher A., Hammerschlag, Neil, Hasan, Abdi, Hawkes, Lucy A., Hazin, Fabio, Heard, Matthew, Hearn, Alex, Hedges, Kevin J., Henderson, Suzanne M., Holdsworth, John, Holland, Kim N., Howey, Lucy A., Hueter, Robert E., Humphries, Nicholas E., Hutchinson, Melanie, Jaine, Fabrice R. A., Jorgensen, Salvador J., Kanive, Paul E., Labaja, Jessica, Lana, Fernanda O., Lassauce, Hugo, Lipscombe, Rebecca S., Llewellyn, Fiona, Macena, Bruno C. L., Mambrasar, Ronald, McAllister, Jaime D., McCully Phillips, Sophy R., McGregor, Frazer, McMillan, Matthew N., McNaughton, Lianne M., Mendonça, Sibele A., Meyer, Carl G., Meyers, Megan, Mohan, John A., Montgomery, John C., Mucientes, Gonzalo, Musyl, Michael K., Nasby-Lucas, Nicole, Natanson, Lisa J., O’Sullivan, John B., Oliveira, Paulo, Papastamtiou, Yannis P., Patterson, Toby A., Pierce, Simon J., Queiroz, Nuno, Radford, Craig A., Richardson, Andy J., Richardson, Anthony J., Righton, David, Rohner, Christoph A., Royer, Mark A., Saunders, Ryan A., Schaber, Matthias, Schallert, Robert J., Scholl, Michael C., Seitz, Andrew C., Semmens, Jayson M., Setyawan, Edy, Shea, Brendan D., Shidqi, Rafid A., Shillinger, George L., Shipley, Oliver N., Shivji, Mahmood S., Sianipar, Abraham B., Silva, Joana F., Sims, David W., Skomal, Gregory B., Sousa, Lara L., Southall, Emily J., Spaet, Julia L. Y., Stehfest, Kilian M., Stevens, Guy, Stewart, Joshua D., Sulikowski, James A., Syakurachman, Ismail, Thorrold, Simon R., Thums, Michele, Tickler, David, Tolloti, Mariana T., Townsend, Kathy A., Travassos, Paulo, Tyminski, John P., Vaudo, Jeremy J., Veras, Drausio, Wantiez, Laurent, Weber, Sam B., Wells, R.J. David, Weng, Kevin C., Wetherbee, Bradley M., Williamson, Jane E., Witt, Matthew J., Wright, Serena, Zilliacus, Kelly, Block, Barbara A., Curnick, David J., Andrzejaczek, Samantha, Lucas, Tim C.D., Goodman, Maurice C., Hussey, Nigel E., Armstrong, Amelia J., Carlisle, Aaron, Coffey, Daniel M., Gleiss, Adrian C., Huveneers, Charlie, Jacoby, David M. P., Meekan, Mark G., Mourier, Johann, Peel, Lauren R., Abrantes, Kátya, Afonso, André S., Ajemian, Matthew J., Anderson, Brooke N., Anderson, Scot D., Araujo, Gonzalo, Armstrong, Asia O., Bach, Pascal, Barnett, Adam, Bennett, Mike B., Bezerra, Natalia A., Bonfil, Ramon, Boustany, Andre M., Bowlby, Heather D., Branco, Ilka, Braun, Camrin D., Brooks, Edward J., Brown, Judith, Burke, Patrick J., Butcher, Paul A., Castleton, Michael, Chapple, Taylor K., Chateau, Olivier, Clarke, Maurice, Coelho, Rui, Cortes, Enric, Couturier, Lydie I. E., Cowley, Paul D., Croll, Donald A., Cuevas, Juan M., Curtis, Tobey H., Dagorn, Laurent, Dale, Jonathan J., Daly, Ryan, Dewar, Heidi, Doherty, Philip D., Domingo, Andrés, Dove, Alistair D. M., Drew, Michael, Dudgeon, Christine L., Duffy, Clinton A. J., Elliott, Riley G., Ellis, Jim R., Erdmann, Mark V., Farrugia, Thomas J., Ferreira, Luciana C., Ferretti, Francesco, Filmalter, John D., Finucci, Brittany, Fischer, Chris, Fitzpatrick, Richard, Forget, Fabien, Forsberg, Kerstin, Francis, Malcolm P., Franks, Bryan R., Gallagher, Austin J., Galvan-Magana, Felipe, García, Mirta L., Gaston, Troy F., Gillanders, Bronwyn M., Gollock, Matthew J., Green, Jonathan R., Green, Sofia, Griffiths, Christopher A., Hammerschlag, Neil, Hasan, Abdi, Hawkes, Lucy A., Hazin, Fabio, Heard, Matthew, Hearn, Alex, Hedges, Kevin J., Henderson, Suzanne M., Holdsworth, John, Holland, Kim N., Howey, Lucy A., Hueter, Robert E., Humphries, Nicholas E., Hutchinson, Melanie, Jaine, Fabrice R. A., Jorgensen, Salvador J., Kanive, Paul E., Labaja, Jessica, Lana, Fernanda O., Lassauce, Hugo, Lipscombe, Rebecca S., Llewellyn, Fiona, Macena, Bruno C. L., Mambrasar, Ronald, McAllister, Jaime D., McCully Phillips, Sophy R., McGregor, Frazer, McMillan, Matthew N., McNaughton, Lianne M., Mendonça, Sibele A., Meyer, Carl G., Meyers, Megan, Mohan, John A., Montgomery, John C., Mucientes, Gonzalo, Musyl, Michael K., Nasby-Lucas, Nicole, Natanson, Lisa J., O’Sullivan, John B., Oliveira, Paulo, Papastamtiou, Yannis P., Patterson, Toby A., Pierce, Simon J., Queiroz, Nuno, Radford, Craig A., Richardson, Andy J., Richardson, Anthony J., Righton, David, Rohner, Christoph A., Royer, Mark A., Saunders, Ryan A., Schaber, Matthias, Schallert, Robert J., Scholl, Michael C., Seitz, Andrew C., Semmens, Jayson M., Setyawan, Edy, Shea, Brendan D., Shidqi, Rafid A., Shillinger, George L., Shipley, Oliver N., Shivji, Mahmood S., Sianipar, Abraham B., Silva, Joana F., Sims, David W., Skomal, Gregory B., Sousa, Lara L., Southall, Emily J., Spaet, Julia L. Y., Stehfest, Kilian M., Stevens, Guy, Stewart, Joshua D., Sulikowski, James A., Syakurachman, Ismail, Thorrold, Simon R., Thums, Michele, Tickler, David, Tolloti, Mariana T., Townsend, Kathy A., Travassos, Paulo, Tyminski, John P., Vaudo, Jeremy J., Veras, Drausio, Wantiez, Laurent, Weber, Sam B., Wells, R.J. David, Weng, Kevin C., Wetherbee, Bradley M., Williamson, Jane E., Witt, Matthew J., Wright, Serena, Zilliacus, Kelly, Block, Barbara A., and Curnick, David J.

Abstract

Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on horizontal movements. Our study addresses the knowledge gap of vertical movements by compiling the first global synthesis of vertical habitat use by elasmobranchs from data obtained by deployment of 989 biotelemetry tags on 38 elasmobranch species. Elasmobranchs displayed high intra- and interspecific variability in vertical movement patterns. Substantial vertical overlap was observed for many epipelagic elasmobranchs, indicating an increased likelihood to display spatial overlap, biologically interact, and share similar risk to anthropogenic threats that vary on a vertical gradient. We highlight the critical next steps toward incorporating vertical movement into global management and monitoring strategies for elasmobranchs, emphasizing the need to address geographic and taxonomic biases in deployments and to concurrently consider both horizontal and vertical movements. Vertical habitat use by sharks, rays, and skates varies globally and has implications for their conservation and management.

Published
2022

12. Beyond Post-release Mortality: Inferences on Recovery Periods and Natural Mortality From Electronic Tagging Data for Discarded Lamnid Sharks

Author

Bowlby, Heather D., Benoît, Hugues P., Joyce, Warren, Sulikowski, James, Coelho, Rui, Domingo, Andrés, Cortés, Enric, Hazin, Fabio, Macias, David, Biais, Gerard, Santos, Catarina, Anderson, Brooke, Bowlby, Heather D., Benoît, Hugues P., Joyce, Warren, Sulikowski, James, Coelho, Rui, Domingo, Andrés, Cortés, Enric, Hazin, Fabio, Macias, David, Biais, Gerard, Santos, Catarina, and Anderson, Brooke

Abstract

Accurately characterizing the biology of a pelagic shark species is critical when assessing its status and resilience to fishing pressure. Natural mortality (M) is well known to be a key parameter determining productivity and resilience, but also one for which estimates are most uncertain. While M can be inferred from life history, validated direct estimates are extremely rare for sharks. Porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) are presently overfished in the North Atlantic, but there are no directed fisheries and successful live release of bycatch is believed to have increased. Understanding M, post-release mortality (PRM), and variables that affect mortality are necessary for management and effective bycatch mitigation. From 177 deployments of archival satellite tags, we inferred mortality events, characterized physiological recovery periods following release, and applied survival mixture models to assess M and PRM. We also evaluated covariate effects on the duration of any recovery period and PRM to inform mitigation. Although large sample sizes involving extended monitoring periods (>90 days) would be optimal to directly estimate M from survival data, it was possible to constrain estimates and infer probable values for both species. Furthermore, the consistency of M estimates with values derived from longevity information suggests that age determination is relatively accurate for these species. Regarding bycatch mitigation, our analyses suggest that juvenile porbeagle are more susceptible to harm during capture and handling, that keeping lamnid sharks in the water during release is optimal, and that circle hooks are associated with longer recovery periods for shortfin mako.

Published
2021
Full Text
View/download PDF

13. Beyond Post-release Mortality: Inferences on Recovery Periods and Natural Mortality From Electronic Tagging Data for Discarded Lamnid Sharks

Author

Bowlby, Heather D, Benoît, Hugues P, Joyce, Warren, Sulikowsk, James, Coelho, Rui, Domingo, Andrés, Cortés, Enric, Hazin, Fabio, Macías-López, Ángel David, Biais, Gérard, Santos, Catarina, Anderson, Brooke, Bowlby, Heather D, Benoît, Hugues P, Joyce, Warren, Sulikowsk, James, Coelho, Rui, Domingo, Andrés, Cortés, Enric, Hazin, Fabio, Macías-López, Ángel David, Biais, Gérard, Santos, Catarina, and Anderson, Brooke

Abstract

Accurately characterizing the biology of a pelagic shark species is critical when assessing its status and resilience to fishing pressure. Natural mortality (M) is well known to be a key parameter determining productivity and resilience, but also one for which estimates are most uncertain. While M can be inferred from life history, validated direct estimates are extremely rare for sharks. Porbeagle (Lamna nasus) and shortfin mako (Isurus oxyrinchus) are presently overfished in the North Atlantic, but there are no directed fisheries and successful live release of bycatch is believed to have increased. Understanding M, post-release mortality (PRM), and variables that affect mortality are necessary for management and effective bycatch mitigation. From 177 deployments of archival satellite tags, we inferred mortality events, characterized physiological recovery periods following release, and applied survival mixture models to assess M and PRM. We also evaluated covariate effects on the duration of any recovery period and PRM to inform mitigation. Although large sample sizes involving extended monitoring periods (>90 days) would be optimal to directly estimate M from survival data, it was possible to constrain estimates and infer probable values for both species. Furthermore, the consistency of M estimates with values derived from longevity information suggests that age determination is relatively accurate for these species. Regarding bycatch mitigation, our analyses suggest that juvenile porbeagle are more susceptible to harm during capture and handling, that keeping lamnid sharks in the water during release is optimal, and that circle hooks are associated with longer recovery periods for shortfin mako.

Published
2021

14. Beyond Post-release Mortality: Inferences on Recovery Periods and Natural Mortality From Electronic Tagging Data for Discarded Lamnid Sharks

Author

Bowlby, Heather D., primary, Benoît, Hugues P., additional, Joyce, Warren, additional, Sulikowski, James, additional, Coelho, Rui, additional, Domingo, Andrés, additional, Cortés, Enric, additional, Hazin, Fabio, additional, Macias, David, additional, Biais, Gérard, additional, Santos, Catarina, additional, and Anderson, Brooke, additional

Published
2021
Full Text
View/download PDF

17. Recovery Potential Assessment for the North Atlantic Designatable Unit Of Shortfin Mako Shark (Isurus oxyrinchus).

Author

Bowlby, Heather D., Coates, Peterson J., Joyce, Warren N., and Simpson, Mark R.

Subjects
*ENDANGERED species, *SHARKS, *FISHERIES, *GROUNDFISHES, *BIOMASS
Abstract

The North Atlantic Designatable Unit (DU) of Shortfin Mako Shark was assessed by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) as Endangered in April 2019, and is currently under consideration for listing under Schedule 1 of the Species at Risk Act (SARA). The Recovery Potential Assessment (RPA) presented here provides information to support the listing recommendation and any recovery actions, should the species be listed. Shortfin Mako occurs throughout the Northern Hemisphere of the Atlantic Ocean. The biological characteristics of Shortfin Mako (i.e., relatively long lifespan, late maturity, and low reproductive output) make the population very susceptible to fishing pressure, which is the main threat identified in the North Atlantic. Multiple international and Canadian fisheries intercept Shortfin Mako as bycatch, and the most recent assessment of the DU predicts that it is overfished relative to biomass at Maximum Sustainable Yield (MSY). Reducing total removals in the North Atlantic to 500 mt is projected to have a > 50% probability of population recovery by 2070. For comparison, international and Canadian removals in 2019 totalled 1,863 mt and 63 mt, respectively. Considering just Canadian fleets, interception probabilities are highest from pelagic longline, with an average of 48% of observed sets encountering Shortfin Mako, followed by bottom longline (0.4% of sets) and otter trawl (0.2% of sets). The most effective Canadian mitigation measure for Shortfin Mako will be the new landings prohibition, implemented in 2020 for pelagic longline and scheduled for implementation in 2021 for fixed-gear groundfish fisheries. The effectiveness of other mitigation measures are relatively unclear and, in many cases, would require dedicated experimentation to test. The current requirement to use circle hooks may need to be revised due to new evidence that increased catchability outweighs any reduction in post-release mortality for Shortfin Mako, thus leading to greater total mortality as compared to using J-hooks. Given the current level of international fisheries removals and the extent of mitigation already in place in Canada, there is very little scope for mitigation actions by Canada to measurably affect recovery potential. [ABSTRACT FROM AUTHOR]

Published
2022

21. Diving into the vertical dimension of elasmobranch movement ecology

Author

Samantha Andrzejaczek, Tim C.D. Lucas, Maurice C. Goodman, Nigel E. Hussey, Amelia J. Armstrong, Aaron Carlisle, Daniel M. Coffey, Adrian C. Gleiss, Charlie Huveneers, David M. P. Jacoby, Mark G. Meekan, Johann Mourier, Lauren R. Peel, Kátya Abrantes, André S. Afonso, Matthew J. Ajemian, Brooke N. Anderson, Scot D. Anderson, Gonzalo Araujo, Asia O. Armstrong, Pascal Bach, Adam Barnett, Mike B. Bennett, Natalia A. Bezerra, Ramon Bonfil, Andre M. Boustany, Heather D. Bowlby, Ilka Branco, Camrin D. Braun, Edward J. Brooks, Judith Brown, Patrick J. Burke, Paul Butcher, Michael Castleton, Taylor K. Chapple, Olivier Chateau, Maurice Clarke, Rui Coelho, Enric Cortes, Lydie I. E. Couturier, Paul D. Cowley, Donald A. Croll, Juan M. Cuevas, Tobey H. Curtis, Laurent Dagorn, Jonathan J. Dale, Ryan Daly, Heidi Dewar, Philip D. Doherty, Andrés Domingo, Alistair D. M. Dove, Michael Drew, Christine L. Dudgeon, Clinton A. J. Duffy, Riley G. Elliott, Jim R. Ellis, Mark V. Erdmann, Thomas J. Farrugia, Luciana C. Ferreira, Francesco Ferretti, John D. Filmalter, Brittany Finucci, Chris Fischer, Richard Fitzpatrick, Fabien Forget, Kerstin Forsberg, Malcolm P. Francis, Bryan R. Franks, Austin J. Gallagher, Felipe Galvan-Magana, Mirta L. García, Troy F. Gaston, Bronwyn M. Gillanders, Matthew J. Gollock, Jonathan R. Green, Sofia Green, Christopher A. Griffiths, Neil Hammerschlag, Abdi Hasan, Lucy A. Hawkes, Fabio Hazin, Matthew Heard, Alex Hearn, Kevin J. Hedges, Suzanne M. Henderson, John Holdsworth, Kim N. Holland, Lucy A. Howey, Robert E. Hueter, Nicholas E. Humphries, Melanie Hutchinson, Fabrice R. A. Jaine, Salvador J. Jorgensen, Paul E. Kanive, Jessica Labaja, Fernanda O. Lana, Hugo Lassauce, Rebecca S. Lipscombe, Fiona Llewellyn, Bruno C. L. Macena, Ronald Mambrasar, Jaime D. McAllister, Sophy R. McCully Phillips, Frazer McGregor, Matthew N. McMillan, Lianne M. McNaughton, Sibele A. Mendonça, Carl G. Meyer, Megan Meyers, John A. Mohan, John C. Montgomery, Gonzalo Mucientes, Michael K. Musyl, Nicole Nasby-Lucas, Lisa J. Natanson, John B. O’Sullivan, Paulo Oliveira, Yannis P. Papastamtiou, Toby A. Patterson, Simon J. Pierce, Nuno Queiroz, Craig A. Radford, Andy J. Richardson, Anthony J. Richardson, David Righton, Christoph A. Rohner, Mark A. Royer, Ryan A. Saunders, Matthias Schaber, Robert J. Schallert, Michael C. Scholl, Andrew C. Seitz, Jayson M. Semmens, Edy Setyawan, Brendan D. Shea, Rafid A. Shidqi, George L. Shillinger, Oliver N. Shipley, Mahmood S. Shivji, Abraham B. Sianipar, Joana F. Silva, David W. Sims, Gregory B. Skomal, Lara L. Sousa, Emily J. Southall, Julia L. Y. Spaet, Kilian M. Stehfest, Guy Stevens, Joshua D. Stewart, James A. Sulikowski, Ismail Syakurachman, Simon R. Thorrold, Michele Thums, David Tickler, Mariana T. Tolloti, Kathy A. Townsend, Paulo Travassos, John P. Tyminski, Jeremy J. Vaudo, Drausio Veras, Laurent Wantiez, Sam B. Weber, R.J. David Wells, Kevin C. Weng, Bradley M. Wetherbee, Jane E. Williamson, Matthew J. Witt, Serena Wright, Kelly Zilliacus, Barbara A. Block, David J. Curnick, Andrzejaczek, Samantha [0000-0002-9929-7312], Lucas, Tim CD [0000-0003-4694-8107], Goodman, Maurice C [0000-0002-6874-2313], Hussey, Nigel E [0000-0002-9050-6077], Armstrong, Amelia J [0000-0001-8103-4314], Carlisle, Aaron [0000-0003-0796-6564], Coffey, Daniel M [0000-0001-5983-0146], Huveneers, Charlie [0000-0001-8937-1358], Jacoby, David MP [0000-0003-2729-3811], Meekan, Mark G [0000-0002-3067-9427], Mourier, Johann [0000-0001-9019-1717], Peel, Lauren R [0000-0001-6960-5663], Abrantes, Kátya [0000-0001-7430-8428], Afonso, André S [0000-0001-9129-278X], Ajemian, Matthew J [0000-0002-2725-4030], Anderson, Brooke N [0000-0003-4299-3496], Araujo, Gonzalo [0000-0002-4708-3638], Armstrong, Asia O [0000-0002-9307-0598], Barnett, Adam [0000-0001-7430-8428], Bennett, Mike B [0000-0001-8051-0040], Bezerra, Natalia A [0000-0002-4203-8408], Bonfil, Ramon [0000-0002-5753-464X], Boustany, Andre M [0000-0001-5501-7190], Bowlby, Heather D [0000-0002-2532-3725], Branco, Ilka [0000-0001-8136-2596], Braun, Camrin D [0000-0002-9317-9489], Brooks, Edward J [0000-0001-5206-7133], Burke, Patrick J [0000-0002-7217-0215], Butcher, Paul [0000-0001-7338-6037], Castleton, Michael [0000-0001-9639-6967], Chapple, Taylor K [0000-0002-0357-0223], Chateau, Olivier [0000-0003-1153-6284], Coelho, Rui [0000-0003-3813-5157], Cortes, Enric [0000-0001-6001-2482], Couturier, Lydie IE [0000-0002-3885-3397], Cuevas, Juan M [0000-0003-0086-5963], Curtis, Tobey H [0000-0003-0164-7335], Dale, Jonathan J [0000-0001-8565-3841], Daly, Ryan [0000-0002-4409-6951], Dewar, Heidi [0000-0002-8202-1387], Doherty, Philip D [0000-0001-7561-3731], Domingo, Andrés [0000-0002-1793-7663], Dove, Alistair DM [0000-0003-3239-4772], Drew, Michael [0000-0002-5109-7792], Dudgeon, Christine L [0000-0001-5059-7886], Duffy, Clinton AJ [0000-0002-3352-1609], Elliott, Riley G [0000-0003-0234-5953], Erdmann, Mark V [0000-0002-3644-8347], Farrugia, Thomas J [0000-0001-9052-8826], Ferreira, Luciana C [0000-0001-6755-2799], Ferretti, Francesco [0000-0001-9510-3552], Finucci, Brittany [0000-0003-1315-2946], Forget, Fabien [0000-0002-4845-4277], Forsberg, Kerstin [0000-0002-1233-9381], Franks, Bryan R [0000-0003-4016-9225], Gallagher, Austin J [0000-0003-1515-3440], García, Mirta L [0000-0003-0143-7397], Gaston, Troy F [0000-0003-0049-0831], Gillanders, Bronwyn M [0000-0002-7680-2240], Green, Jonathan R [0000-0001-7671-6716], Green, Sofia [0000-0002-2878-5984], Griffiths, Christopher A [0000-0001-7203-0426], Hammerschlag, Neil [0000-0001-9002-9082], Hawkes, Lucy A [0000-0002-6696-1862], Hearn, Alex [0000-0002-4986-098X], Hedges, Kevin J [0000-0002-2219-2360], Holland, Kim N [0000-0003-4663-7026], Howey, Lucy A [0000-0001-7381-4871], Humphries, Nicholas E [0000-0003-3741-1594], Hutchinson, Melanie [0000-0001-7042-0658], Jaine, Fabrice RA [0000-0002-9304-5034], Jorgensen, Salvador J [0000-0002-4331-1648], Kanive, Paul E [0000-0003-2430-6920], Labaja, Jessica [0000-0001-6916-7050], Lana, Fernanda O [0000-0001-7235-069X], Lassauce, Hugo [0000-0001-9636-6522], Lipscombe, Rebecca S [0000-0001-9602-643X], Llewellyn, Fiona [0000-0003-4309-8311], Macena, Bruno CL [0000-0001-5010-8560], McCully Phillips, Sophy R [0000-0003-3110-5916], McGregor, Frazer [0000-0002-7441-4404], McMillan, Matthew N [0000-0001-6348-184X], Mendonça, Sibele A [0000-0002-1981-5950], Mohan, John A [0000-0002-2758-163X], Mucientes, Gonzalo [0000-0001-6650-3020], Musyl, Michael K [0000-0003-4719-9259], Nasby-Lucas, Nicole [0000-0001-8355-9392], Natanson, Lisa J [0000-0002-2903-6037], O'Sullivan, John B [0000-0002-1689-2141], Oliveira, Paulo [0000-0001-7697-2111], Papastamtiou, Yannis P [0000-0002-6091-6841], Patterson, Toby A [0000-0002-7150-9205], Pierce, Simon J [0000-0002-9375-5175], Queiroz, Nuno [0000-0002-3860-7356], Radford, Craig A [0000-0001-7949-9497], Richardson, Andy J [0000-0003-2598-5080], Richardson, Anthony J [0000-0002-9289-7366], Righton, David [0000-0001-8643-3672], Rohner, Christoph A [0000-0001-8760-8972], Royer, Mark A [0000-0002-6938-7536], Schaber, Matthias [0000-0003-1032-4626], Schallert, Robert J [0000-0002-3584-2668], Scholl, Michael C [0000-0002-6014-1759], Semmens, Jayson M [0000-0003-1742-6692], Setyawan, Edy [0000-0001-6629-5997], Shea, Brendan D [0000-0001-7771-0586], Shillinger, George L [0000-0001-5168-4551], Shipley, Oliver N [0000-0001-5163-3471], Sianipar, Abraham B [0000-0003-4049-3893], Silva, Joana F [0000-0002-2897-1410], Sims, David W [0000-0002-0916-7363], Sousa, Lara L [0000-0002-4392-3572], Southall, Emily J [0000-0001-7246-278X], Spaet, Julia LY [0000-0001-8703-1472], Stevens, Guy [0000-0002-2056-9830], Sulikowski, James A [0000-0002-3646-5200], Thums, Michele [0000-0002-8669-8440], Tickler, David [0000-0001-7722-0771], Tolloti, Mariana T [0000-0001-6895-2479], Townsend, Kathy A [0000-0002-2581-2158], Travassos, Paulo [0000-0001-8667-5292], Tyminski, John P [0000-0001-8251-7385], Vaudo, Jeremy J [0000-0002-6826-3822], Veras, Drausio [0000-0001-5627-6848], Wantiez, Laurent [0000-0001-5024-2057], Weber, Sam B [0000-0003-1447-4082], Wells, RJ David [0000-0002-1306-0614], Weng, Kevin C [0000-0002-7069-7152], Wetherbee, Bradley M [0000-0002-3753-8950], Williamson, Jane E [0000-0003-3627-4508], Witt, Matthew J [0000-0002-9498-5378], Zilliacus, Kelly [0000-0001-9166-5611], Block, Barbara A [0000-0001-5181-3616], Curnick, David J [0000-0002-3093-1282], Apollo - University of Cambridge Repository, Zoological Society of London - ZSL (UNITED KINGDOM), Centre de recherches insulaires et observatoire de l'environnement (CRIOBE), Université de Perpignan Via Domitia (UPVD)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), and Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)

Subjects
Multidisciplinary, [SDV]Life Sciences [q-bio], Violacea Bonaparte, 3103 Ecology, Pelagic stingray, Scalloped hammerhead shark, 41 Environmental Sciences, Western North Pacific, Reproductive-biology, Habitat Use, Carcharhinus-falciformis, Galeocerdo-cuvier, Sexual segregation, Sphyna-lewini, 31 Biological Sciences
Abstract

20 pages, 3 tables, 5 figures.-- Samantha Andrzejaczek ... et al.-- Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC), Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have mostly focused on horizontal movements. Our study addresses the knowledge gap of vertical movements by compiling the first global synthesis of vertical habitat use by elasmobranchs from data obtained by deployment of 989 biotelemetry tags on 38 elasmobranch species. Elasmobranchs displayed high intra- and interspecific variability in vertical movement patterns. Substantial vertical overlap was observed for many epipelagic elasmobranchs, indicating an increased likelihood to display spatial overlap, biologically interact, and share similar risk to anthropogenic threats that vary on a vertical gradient. We highlight the critical next steps toward incorporating vertical movement into global management and monitoring strategies for elasmobranchs, emphasizing the need to address geographic and taxonomic biases in deployments and to concurrently consider both horizontal and vertical movements, Data analysis was funded by the Bertarelli Foundation through the Marine Science program through grants to D.J.C., B.A.B., and S.A. D.J.C. is also funded through Research England, UK. S.A. and B.A.B. thank the Moore Foundation and the Packard Foundation. F.G.-M. thanks the Instituto Politecnico Nacional for fellowships (COFAA, EDI). S.B.W. thanks funding from the Darwin Initiative (DPLUS046). A.D.M.D. acknowledges funding from the Research and Conservation Budget at Georgia Aquarium, including philanthropic gifts from several anonymous donors. K.F. acknowledges funding from the Rolex Awards for Enterprise and the Whitley Fund for Nature

Published
2022

Catalog

Books, media, physical & digital resources
See catalog results