Supplemental Table 1
Studies that report organohalogen contaminants in the brains of pinnipeds and cetaceans.
Brain Region Species Analytes Reference
"brain" gray seal, harbor porpoise DDTs, dieldrin, PCBs (Holden, 1978)
cerebellum, striped dolphin DDTs, PCBs, pesticides (Tanabe et al., 1981)
"brain" sperm whale DDTs, PCBs (Aguilar, 1983)
"brain" harbor seal PCBs (Bernhoft and Skaare, 1994)
"brain" harp seal (Oehme et al., 1995)
cerebellum, common dolphin PCBs, HCHs (Mossner et al., 1994)
"brain" neonatal gray seal DDTs, PCBs (Jenssen et al., 1996)
"brain" striped dolphin DDTs, PCBs, HCB (Marsili and Focardi, 1997)
"brain" neonate beluga whale DDTs, PCBs, pesticides (Gauthier et al., 1998)
"brain" beluga whale DDTs, PCBs, pesticides (Metcalfe et al., 1999)
"brain" harbour porpoise (Karlson et al., 2000)
"brain" harbour porpoise PCNs, non-ortho PCBs (Ishaq et al., 2000)
melon-headed whale, striped
cerebrum PCBs, OH-PCBs (Kunisue et al., 2007)
dolphin, finless porpoise
Stranding and life history information of seal and dolphin specimens in which analysis of organohalogen contaminants was performed
Condition Stranding Length Body Wt. Brain Brain
Field ID Common Name Date/time of death Location Codea Type Sex (cm) Age Class (kg) Wt. (g) Lesionb Body Condition Cause of Death Samples Analyzed
CCSN04-186-Hg gray seal Aug 25, 2004 at 20:52 Boston Beach, Truro, MA 1 single m 113 neonate 27.0 291.6 no Emaciated Diseasec CSF
CCSN04-191-Dd common dolphin Sept 6, 2004 at 12:25 Squaw Island, Hyannisport, MA 1 single f 207 adult 80.0 936.0 yes Slightly thin Parasitesd CSF
CCSN04-219-Dd common dolphin Nov 30, 2004 at 17:30 Herring River, Wellfleet, MA 1 mass f 169 subadult 56.0 875.8 no Not emaciated Disease CSF
CCSN04-195-La Atlantic white-sided dolphin Sept 14, 2004 at 17:36 Herring River Gut, Wellfleet, MA 1 single m 192 subadult 73.5 1460.3 no Not emaciated Disease CSF
CCSN05-037-La Atlantic white-sided dolphin Feb 15, 2005 at 14:30 Chipman's Cove, Wellfleet, MA 1 mass f 206 adult 125.0 1292.2 no Not emaciated NSF CSF, Cerebellum GM
CCSN05-038-La Atlantic white-sided dolphin February 15, 2005 Chesequesset Neck, Wellfleet, MA 2 mass f 208 lactating adult 125.0 1153.0 yes Not emaciated Neurologicale CSF
CCSN05-039-La Atlantic white-sided dolphin February 15, 2005 Chesequesset Neck, Wellfleet, MA 2 mass f 211 pregnant adult 146.0 1329.7 no Not emaciated NSF CSF, Cerebellum GM
CCSN05-040-La Atlantic white-sided dolphin February 15, 2005 Chesequesset Neck, Wellfleet, MA 2 mass f 204 pregnant adult 123.6 1305.3 no Not emaciated NSF CSF, Cerebellum GM
CCSN05-084-La Atlantic white-sided dolphin Mar 19, 2005 at 14:15 Wellfleet, MA 1 single m 156 subadult 42.6 1057.8 no Emaciated Predationf CSF
CCSN05-231-La Atlantic white-sided dolphin Sept 26, 2005 at 13:30 Sandy Neck, Barnstable, MA 1 single f 137 neonate 30.0 839.0 no Emaciated Dependent calf g CSF
CCSN05-232-La Atlantic white-sided dolphin Oct 4, 2005 at 12:22 Nauset Beach, Eastham, MA 1 single f 185 subadult 77.5 1186.1 yes Slightly thin Parasites CSF
A condition code of 1 indicates that the animal was euthanized, while a condition code of 2 indicates that the animal was found dead but the specimen was in
fresh condition (i.e., less than 24 hours had passed since the time of death).
Brain lesions were identified using magnetic resonance imaging. CCSN04-191-Dd = lesion in left globus pallidus; CCSN05-038-La = lesion in right occipital lobe; CCSN05-232-La = lesion in vermis of cerebellum.
Disease = enteritis; peritonitis; pancreatitis; pneumonia; cardiomyocyte atrophy; carcinoma; bacterial, viral, or fungal infection.
Parasites = primary cause of death caused by parasites: verminous gastritis, verminous encephalitis, etc.
Neurological = encephalitis, meningitis, other lesions and behaviors not caused by the presence of parasites.
Predation = animal died or was euthanized due to wounds suffered by canid, shark, or gull attacks.
Dependent calf = emaciation/dehydration of a very young animal believed to be separated from or abandoned by the mother.
NSF = no significant findings.
CSF = cerebrospinal fluid.
Cerebellum GM = cerebellum gray matter