Patrick Charapata

Long-term retention of paralytic shellfish toxins in a Pacific Arctic bivalve population

Evangeline Fachon, Patrick Charapata, Kathi A. Lefebvre, Emily K. Bowers et autres

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Individual Specialization in a Generalist Apex Predator: The Leopard Seal

Emily S. Sperou, Douglas J. Krause, Renato Borras‐Chavez, Patrick Charapata et autres

1. Apex predators are typically considered dietary generalists; often masking individual variability. However, individual specialization—consistent differences in diet and foraging strategies among individuals— is common in apex predators. In some species, only a few specialized individuals can significantly impact prey populations. 2. …

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A Beginner’s Guide for Using Bone in Marine Mammal Research

Patrick Charapata, Casey T. Clark, Emily S. Sperou, Brooke Morris et autres

Climate change has drastically altered ecosystems world-wide, making animal population data from before the modern era (<1950 CE) essential for establishing accurate baselines against which these changes can be measured. As a mineralized tissue composed of organic and inorganic materials, bone can …

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Walruses are potentially exposed to paralytic shellfish toxin concentrations that impact their health during Alexandrium blooms in the Alaskan Arctic

Patrick Charapata, Evangeline Fachon, Donald Mark Anderson, Gay G. Sheffield et autres

ABSTRACT Harmful algal bloom (HAB) activity of Alexandrium catenella , a dinoflagellate that produces paralytic shellfish toxins (PSTs), has increased in the Alaskan Arctic due to warming ocean conditions. Arctic wildlife exposure to PSTs due to these blooms remains unknown. The Pacific …

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Bowhead whale faeces link increasing algal toxins in the Arctic to ocean warming

Kathi A. Lefebvre, Patrick Charapata, Raphaela Stimmelmayr, Peigen Lin et autres

Abstract Over the last two decades, ocean warming and rapid loss of sea ice have dramatically changed the Pacific Arctic marine environment1–3. These changes are predicted to increase harmful algal bloom prevalence and toxicity, as rising temperatures and larger open water areas …

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Individual Specialization in a Generalist Apex Predator: The Leopard Seal

Emily S. Sperou, Douglas J. Krause, Renato Borras‐Chavez, Patrick Charapata et autres

ABSTRACT Apex predators are typically considered dietary generalists, which often masks individual variability. However, individual specialization—consistent differences among individuals in resource use or ecological role—is common in apex predators. In some species, only a few specialized individuals can significantly impact prey populations. …

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Saxitoxin Linked to Deaths of Northern Fur Seals in the Southeast Bering Sea

Kathi A. Lefebvre, Lauren M. Divine, Paul I. Melovidov, Hanna Hellen et autres

ABSTRACT In August 2024, a northern fur seal mortality event was observed on St. Paul Island, AK in the southeast (SE) Bering Sea. Ten seals in good body condition were found dead along with large accumulations of dead fish on Benson Beach …

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Paralytic Shellfish Toxin Concentrations Measured in Alaskan Arctic Clams Using ELISA and HPLC Methods

Patrick Charapata, Emily K. Bowers, Donnie Ransom Hardison, Steve Kibler et autres

Clams are efficient vectors of potent algal neurotoxins, a suite of saxitoxin (STX) congeners collectively called paralytic shellfish toxins (PSTs), to higher trophic levels. The Alaskan Arctic is a region facing an expanding threat from PSTs due to ocean warming, yet little …

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Hormones and reproductive cycles in marine mammals

Dara N. Orbach, Emily S. Sperou, Makayla A. Guinn, Patrick Charapata

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Contributors

Arnab Banerjee, Helen L. Bateman, Anna Isabel Bautista, Annaliese K. Beery et autres

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Environmental and ecological changes influence lifetime trends of reproduction, stress, and stable isotopes reconstructed from female yelloweye rockfish opercula

Patrick Charapata, Stephen J. Trumble

Abstract Climate change threatens fisheries health through changing ecosystem dynamics; however, the impacts on the physiology and ecology of commercial fish populations are unclear. Here, annually deposited growth increments of female yelloweye rockfish (Sebastes ruberrimus) opercula collected in the Gulf of Alaska …

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Correction: Reading the biomineralized book of life: expanding otolith biogeochemical research and applications for fisheries and ecosystem-based management

Patrick Reis‐Santos, Bronwyn May Gillanders, Anna M. Sturrock, Christopher Izzo et autres

There was an oversight in the authorship at the time of publication and the article is corrected to include Patrick Charapata and Stephen Trumble from the Biology Department, Baylor University, Waco, TX 76706, USA. The correct full authorship is given below: Patrick …

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