Journal Article10.1111/J.1748-7692.2006.00095.X
Forensic methods for characterizing watercraft from watercraft-induced wounds on the florida manatee (trichechus manatus latirostris)
Sentiel A. Rommel,Alexander M. Costidis,Thomas D. Pitchford,Jessica D. Lightsey,Richard H. Snyder,Elsa M. Haubold +5 more
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TL;DR: A 5-yr subset of mortality data suggests that a disproportionate number of propeller-caused watercraft-related mortalities could be attributed to propeller diameters ≥43.2 cm (17 in), inferring that these were caused by watercraft ≥12.2 m (40 ft) as discussed by the authors.
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Abstract: Watercraft-related mortality represents 1,253 (24.9%) of 5,033 Florida manatee (Trichechus manatus latirostris) deaths recorded between 1 January 1979 and 31 December 2004. Wound patterns generated by collisions with watercraft are diagnostic. Sets of cuts and scrapes that are roughly equidistant and perpendicular to the direction of vessel travel are consistent with lacerations made by propeller blades. From these lesions, estimates of propeller diameter, pitch, rotation, and direction of travel may be obtained. Considerable overlap of propeller sizes and pitches on different size vessels, common use of counter rotation propellers, and numerous other complicating factors may confound efforts to accurately predict vessel size and type from propeller wounds. Of the more than one million watercraft registered in Florida, 98% are ≤12.2 m (40 ft), yet watercraft 5.3–36.6 m (17.5–120 ft) are known to have killed manatees. Analysis of a 5-yr subset of mortality data suggests that a disproportionate number of propeller-caused watercraft-related mortalities could be attributed to propeller diameters ≥43.2 cm (17 in.), inferring that these were caused by watercraft ≥12.2 m (40 ft).
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Citations
A Global Review of Vessel Collisions With Marine Animals
TL;DR: In this article, the authors focus on the effects of maritime vessel collisions with marine animals, including smaller whales, dolphins, porpoises, dugongs, manatees, whale sharks, sharks, seals, sea otters, sea turtles, penguins, and fish.
Criteria and case definitions for serious injury and death of pinnipeds and cetaceans caused by anthropogenic trauma.
Michael J. Moore,Julie van der Hoop,Susan G. Barco,Alexander M. Costidis,Frances M. D. Gulland,Paul Jepson,Kathleen M. T. Moore,Stephen Raverty,William A. McLellan +8 more
TL;DR: This Theme Section provides basic investigative methods, and case definitions for each of the more commonly recognized case presentations of human interactions in pinnipeds and cetaceans.
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The effects of noise disturbance from various recreational boating activities common to inland waters on the cardiac physiology of a freshwater fish, the largemouth bass (Micropterus salmoides).
Ashley L. Graham,Steven J. Cooke +1 more
TL;DR: In this article, the effects of noise disturbance from boating on fish were evaluated using largemouth bass (Micropterus salmoides) as a model, and the results demonstrated that fish experienced sublethal physiological disturbances in response to the noise propagated from recreational boating activities.
Scarring patterns and relative mortality rates of Indian Ocean whale sharks
Conrad W. Speed,Mark G. Meekan,David Rowat,Simon J. Pierce,Andrea D. Marshall,Corey J. A. Bradshaw +5 more
TL;DR: While scarring from natural predators and smaller vessels appears to be unrelated to whale shark survival, the effect of deaths related to ship strike need to be quantified to assist in future management of this species.
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Differentiating Serious and Non-Serious Injury of Marine Mammals: Report of the Serious Injury Technical Workshop
Melissa S. Andersen,Karin A. Forney,Timothy V. N. Cole,Tom Eagle,Robyn Angliss,Lynne Barre,Lisa Van Atta,Diane Borggaard,Teri Rowles,Brent Norberg,Janet Whaley,Laura Engleby +11 more
- 01 Jan 2008
TL;DR: The 2007 Serious Injury Technical Workshop as discussed by the authors was the first workshop devoted to the distinction between serious and non-serious marine mammal injuries, which was held at the National Marine Fisheries Service (NMFS).
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References
Manatee Mortality in Puerto Rico.
Antonio A. Mignucci-Giannoni,Ruby A. Montoya-Ospina,Nilda M. Jiménez-Marrero,Marta A. Rodríguez-López,Ernest H. Williams,Robert K. Bonde +5 more
TL;DR: A reduction in anthropogenic mortality of this endangered species can be accomplished only through education and a proactive management and conservation plan that includes law enforcement, mortality assessment, scientific research, rescue and rehabilitation, and inter- and intraagency cooperation.
Methods used during gross necropsy to determine watercraft-related mortality in the Florida manatee (Trichechus manatus latirostris).
TL;DR: This study documents the methods used in determining watercraft-related mortality during gross necropsy and explains why these findings are diagnostic.
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Skin density and its influence on buoyancy in the manatee (trichechus manatus latirostris), harbor porpoise (phocoena phocoena), and bottlenose dolphin (tursiops truncatus)
TL;DR: Calculation of buoyant forces of the skeleton, skin and lungs demonstrates that the manatee is positively buoyant at the surface and negatively buoyants at depths of less than 10 m.
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