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In 2016, two adult male sperm whales beached off of Yangkou Port in Nantong City, Jiangsu Province, China. The local government planned to preserve them as specimens, one was entrusted to Dalian Hoffen Biological Co., Ltd., and thus became the first sperm whale to be preserved by plastination. The other sperm whale was preserved in Nantong by the traditional stripping method (The skin was preserved, and then the prosthesis was filled into the skin to preserve the specimens. The material of the prosthesis was polyurethane. The outline of the animal was sculpted by suturing the skin like a bag and filling it with polyurethane). Plastination of such a large marine mammal allowed us to view the mutual adaptations of its internal structure to its specific living environment and daily habits. This sperm whale is the largest specimen in the world and this is the first time a sperm whale has been preserved using the plastination method. The plastination process also provides a method for studying the anatomy of large marine mammals for humans to understand deep-sea organisms at close contact and visual level. The plastination of this sperm whale promises to be a world class resource holding tremendous scientific, educational, and artistic value.
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http://dx.doi.org/10.1111/joa.13581 | DOI Listing |
Int J Mol Sci
August 2025
Department of Biology, University of Napoli Federico II, Via Cinthia 26, 80126 Napoli, Italy.
Effective species identification is crucial for the conservation and management of marine mammals, particularly in regions such as the Mediterranean Sea, where several cetacean populations are endangered or vulnerable. In this study, we developed and validated a High-Resolution Melting (HRM) analysis protocol for the rapid, cost-effective, and reliable identification of the four representative marine cetacean species that occur in the Mediterranean Sea: the bottlenose dolphin (), the striped dolphin (), the sperm whale (), and the fin whale (). Species-specific primers targeting mitochondrial DNA regions (cytochrome b and D-loop) were designed to generate distinct melting profiles.
View Article and Find Full Text PDFPLoS One
August 2025
Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America.
Deploying animal-borne suction-based tag devices on whales has been one of the primary tools used by researchers over the past several decades to gather high-resolution scientific information, such as bioacoustics, heart rate, dive depth, and body orientation. However, the process of successfully applying animal-borne tags is logistically challenging and requires substantial operator skill. Current methods apply tags by approaching the whale in a boat and adhering the tag via a long extension pole.
View Article and Find Full Text PDFEcol Evol
August 2025
Section of Environmental Biology Faculty of Environmental Earth Science, Hokkaido University Sapporo Hokkaido Japan.
Whales of the superfamily Physeteroidea, which includes the genera and , exhibit a unique visual defense mechanism involving the release of dark reddish-brown feces (locally called "tsunabi-ink" in Japan) into the water to obscure themselves from predators and other threats. However, the mechanism underlying pigmentation remains unknown. Because physeteroids possess an enlarged distal colon that retains fecal material, a possible explanation is that symbiont microbial metabolism contributes to the feces pigmentation.
View Article and Find Full Text PDFJ Am Chem Soc
August 2025
Department of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States.
Heme proteins are essential metalloproteins with diverse biological roles, and these functions are facilitated by the heme's ability to adopt multiple oxidation states, with Fe(II), Fe(III), and Fe(IV) being the most commonly observed. While highly reduced heme states beyond Fe(II) have been studied in synthetic complexes, their presence and characterization in native hemoproteins have remained largely unexplored. In this study, we report a full conversion of sperm whale myoglobin (Mb) to an ultrareduced state through chemical reduction under physiologically relevant conditions.
View Article and Find Full Text PDFEnviron Pollut
July 2025
MARE - Marine and Environmental Sciences Centre / ARNET - Aquatic Research Network, ARDITI - Regional Agency for the Development of Research, Technology and Innovation, Funchal, Portugal; Faculty of Life Science, University of Madeira, Funchal, Portugal.
The increasing use of personal care products has led to the widespread of organic UV filters (oUVFs) in marine ecosystems, yet their occurrence and potential impacts on pelagic and deep-sea environments remain unclear. This study assessed oUVFs contamination in the blubber of two deep-diving cetacean species -the short-finned pilot whale (Globicephala macrorhynchus) and the sperm whale (Physeter macrocephalus)-off Madeira Island, Eastern North Atlantic. Using microwave-assisted extraction and UHPLC-MS/MS, four of eleven targeted oUVFs were detected in blubber: homosalate, 2-ethylhexyl salicylate, octocrylene, and methylene bis-benzotriazole (UV-360).
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