Cookiecutter Shark Bite Wounds on Cetaceans of the Gulf of Mexico

Grace, Mark A.; Dias, Laura Aichinger; Maze-Foley, Katherine; Sinclair, Carrie; Mullin, Keith D.; Garrison, Lance P.; Noble, Lauren

doi:10.1578/am.44.5.2018.491

Cited by 12 publications

(7 citation statements)

References 8 publications

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“…They both also had a mottled appearance due to small, scattered, pale patches, which appeared to be due to sloughing skin (Figure 5a-c). Animal 1 also had at least two cookiecutter shark bites (Isistius spp., but see Grace et al, 2018, for other possible shark genera; Figure 5a), including a relatively fresh one with red, exposed flesh (not shown); Animal 2 also had at least two healed cookiecutter shark wounds (Figure 5b, c). The bite wounds that were largely healed were pale gray, and it appeared that they were going to heal the same color as the surrounding skin as it does in at…”

Section: Other Markingsmentioning

confidence: 97%

Acoustic recordings, biological observations, and genetic identification of a rare(?) beaked whale in the North Pacific: Mesoplodon carlhubbsi

Ballance

Pitman

Barlow

et al. 2023

Marine Mammal Science

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Although Hubbs' beaked whale (Mesoplodon carlhubbsi) was previously known from over 60 strandings on both sides of the North Pacific, it had been identified alive in the wild only once, off Oregon in 1994. In September 2021, we conducted a search effort for beaked whales off the coast of Oregon using a towed hydrophone array and a visual search team. Approximately 350 km off the Columbia River mouth, we detected the vocalizations of an unidentified mesoplodont whale; we stopped our vessel and waited in the area until two unidentified juvenile Mesoplodon surfaced and stayed near our vessel for almost 2 hr. During that time, we took numerous photographs and videos, made behavioral observations, and recorded their vocalizations. The DNA sequence from a biopsy sample identified them as M. carlhubbsi. In this paper, we discuss our biological observations, including color patterning and acquired markings, behavioral observations, and describe for the first time the acoustic characteristics of this species. We confirm that M. carlhubbsi is the source of a previously unidentified acoustic signal known as BW37V, and we update what is known about the at‐sea distribution of this species based on previous recordings and observational records.

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Section: Other Markingsmentioning

confidence: 97%

Acoustic recordings, biological observations, and genetic identification of a rare(?) beaked whale in the North Pacific: Mesoplodon carlhubbsi

Ballance

Pitman

Barlow

et al. 2023

Marine Mammal Science

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“…2) were trawl-captured during a visual survey of cetaceans conducted in the Gulf of Mexico through the National Oceanic and Atmospheric Administration/National Marine Fisheries Service/Southeast Fisheries Science Center (NOAA/ NMFS/SEFSC) 2010 Sperm Whale Autonomous Prey Study (SWAPS). Midwater trawls were conducted near Sperm Whale (Physeter macrocephalus; Linnaeus 1758) sightings to capture potential sperm whale prey (fishes and squids; Grace et al 2018). Cookiecutter sharks were initially frozen in seawater and later preserved in 20% formalin, then archived in 70% ethanol at the Tulane University Biodiversity Research Institute (TUBRI) Royal D. Suttkus Fish Collection, Belle Chasse, Louisiana (TUBRI catalog numbers TU 204003 I. plutodus, TU 204004 I. brasiliensis).…”

Section: Specimens and Constructing The Jaw Modelsmentioning

confidence: 99%

“…Bite wound morphometrics related to cookiecutter shark total lengths have been used to examine cookiecutter shark biogeography and feeding strategies (Castro et al 2018). Stable isotope analysis of cookiecutter shark tissue samples confirms that cookiecutter sharks' prey includes relatively high trophic level fauna (Grace et al 2018), and cookiecutter sharks can have ontogenetic dietary shifts (Carlisle et al 2021). However, cookiecutter shark bite wounds are frequently used to simply identify the presence of cookiecutter sharks in general without attempting to distinguish cookiecutter shark species from each other (I. brasiliensis or I. plutodus) based on bite geometrics or bite morphometrics, or from their dalatiid relatives, some of which have similar teeth and jaws (Ebert et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Simulating cookiecutter shark bites with a 3D-printed jaw-dental model

Grace

Huber²,

Travis³

et al. 2023

Zoomorphology

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Ectoparasitic cookiecutter sharks (Chondrichthyes: Squaliformes: Dalatiidae; Isistius) share common features for jaw and teeth structure, in particular, robust lower jaws and dignathic heterodonty (upper teeth crowns are more slender and shorter than the broader and longer lower teeth crowns). The jaws and teeth are well suited for feeding by excising a nearly symmetrical oval-flesh bite plug from a variety of prey species including marine mammals, fishes, and squids. There is considerable speculation regarding cookiecutter shark bite dynamics given that natural feeding behavior has not been observed. To elucidate cookiecutter shark bite dynamics, bites were experimentally simulated for the two cookiecutter shark species; the Cookiecutter Shark, Isistius brasiliensis (Quoy JRC, Gaimard, P (1824) Zoologie (3) Imprimerie royale) and the Largetooth Cookiecutter Shark, Isistius plutodus (Garrick JAF, Springer S (1964) Isistius plutodus, a new squaloid shark from the Gulf of Mexico. Copeia 678–682), using three-dimensional printed models of jaws with teeth. Bite simulations were conducted at standardized jaw bite-gape angles and ballistic gelatin was used to approximate prey flesh, from which aspect ratio analysis of bite wound geometrics was used to determine bite wound morphometrics for each species. The simulated bite experiment also was useful for assessing factors that potentially affect cookiecutter shark total length estimates when based on natural bite geometrics. In addition, the mechanics of producing experimental bites provide new insights related to the necessity for cookiecutter sharks to rotate their body to create nearly symmetrical oval bite wounds.

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“…Dalatiid sharks of the genus Isistius (cookiecutter sharks) employ a unique feeding behavior, the details of which are not fully understood. They excise an oval flesh plug (Strasburg 1963;Shirai & Nakaya 1992) from a variety of prey including marine mammals, sharks, tunas, billfishes, squids, and infrequently, humans (Jones 1971;Dwyer & Visser 2011;Gallo-Reynoso et al 2005;Papastamatiou et al 2010;Hoyos-Padilla et al 2013;Honebrink et al 2011;Ribéreau-Gayon et al 2017;Ribéreau-Gayon et al 2018;Grace et al 2018). Here we describe a new species of dalatiid shark of the genus Mollisquama based on a single specimen captured from the Gulf of Mexico (Figs.…”

Section: Introductionmentioning

confidence: 95%

A new Western North Atlantic Ocean kitefin shark (Squaliformes: Dalatiidae) from the Gulf of Mexico

Grace

Doosey

Denton

et al. 2019

Zootaxa

Self Cite

613

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A new species of kitefin shark (Squaliformes; Dalatiidae) is described from the Gulf of Mexico (Western North Atlantic Ocean) based on five diagnostic features not seen on the only other known Mollisquama specimen, the holotype of Mollisquama parini Dolganov which was captured in the Eastern South Pacific Ocean. The new species, Mollisquama mississippiensis sp. nov., is distinguished from its congener by a putative pit organ located ventrally just posterior of the lower jaw margin center, photophores irregularly distributed along many areas of the body, 16 distinct ventral-abdominal photophore aggregations, and two differences associated with the dentition. Other potential distinguishing features are 10 fewer vertebrae than Mollisquama parini and six morphometric proportional differences that exceeded +/- 20% from the holotype.

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Cookiecutter Shark Bite Wounds on Cetaceans of the Gulf of Mexico

Cited by 12 publications

References 8 publications

Acoustic recordings, biological observations, and genetic identification of a rare(?) beaked whale in the North Pacific: Mesoplodon carlhubbsi

Acoustic recordings, biological observations, and genetic identification of a rare(?) beaked whale in the North Pacific: Mesoplodon carlhubbsi

Simulating cookiecutter shark bites with a 3D-printed jaw-dental model

A new Western North Atlantic Ocean kitefin shark (Squaliformes: Dalatiidae) from the Gulf of Mexico

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