Table 1.

Factors potentially predicting cetacean genetic diversity, with number of species for which this factor could be determined (n). Whaling1 differs from Whaling2 as it is an index based on the historical whaling information presented in Perry, Demaster, and Silber (1999), while Whaling2 is a binary variable indicating whether the species has been harvested through whaling or not. Ocean1 is the number of oceans included in the species’ range (up to 5), and Ocean2 indicates whether the species is found exclusively in the Atlantic, Pacific, or in both

Factor	Type	Levels/notes	Restrictions	n	Reference
Current population size	Quantitative	Data were logged	Population known within a factor of 5	35	IUCN Red List ver3.1 (2016)
Current IUCN status	Categorical	Least Concern (LC) Near Threatened (NT) Vulnerable (VU) Endangered (EN)	Data Deficient (DD) species not included	27	IUCN Red List ver3.1 (2016)
IUCN status from 1990s	Categorical	(Same as above)	DD species not included	26	IUCN Red List ver3.1 (2016)
Population trend	Categorical	DecreasingStableIncreasing		11	IUCN Red List ver3.1 (2016)
Whaling1	Categorical	NoneSomeExtensive		42	From Perry et al. (1999)
Whaling2	Categorical	HarvestedNot harvested		42	From Perry et al. (1999)
Mysticetes/odontocetes	Categorical			42	Society for Marine Mammalogy (2016)
Cetacean families	Categorical	BalaenidaeBalaenopteridaeDelphinidaeMonodontidaeEschrichtiidaeZiphiidaeKogiidaePhocoenidaePhyseteridaePontoporiidae		42	Society for Marine Mammalogy (2016)
Latitudinal range	Quantitative	Total number of degrees of latitude within the species’ distribution		40	Charts from Folkens, Folkens, Stewart, Clapham, and Powell (2002)
Hemisphere	Categorical	SouthernNorthern		42	Map from IUCN Red List (2016)
Ocean1	Quantitative	Number of oceans overlapping the species’ range (1–5)		42	Map from IUCN Red List (2016)
Ocean2	Categorical	AtlanticPacificBoth		42	Map from IUCN Red List (2016)
Habitat	Categorical	NeriticOceanicBoth		42	IUCN Red List (2016)
Temperature	Categorical	Tropical/temperatePolarCosmopolitan		42	Folkens et al. (2002)
Maximum length	Quantitative	m	Female	38	Folkens et al. (2002)
Generation time	Quantitative	yr		37	Folkens et al. (2002)
Lifespan	Quantitative	yr		31	Folkens et al. (2002)
Encephalization Quotient	Quantitative	EQ0.67 by Jerison (1973)	Only Odontocetes	22	Marino (2008); Marino et al. (2004)
Group size	Categorical	1: solitary or pairs2: 3–10 individuals3: 10–50 individuals4: hundreds		42	Folkens et al. (2002)
Breeding strategy	Categorical	CongregateDisperse	Only Mysticetes	11
Social structure	Categorical	MatrilinealNot matrilineal	Matrilineal if female offspring stays with mother for entire lifetime	42	Whitehead et al. (2017)