At a nesting colony of Mandt's black guillemots (Cepphus grylle
mandtii) on nearby Cooper Island (Fig.
Black Guillemot (Cepphus grylle
) breeds in solitary pairs or in small groups near sea level.
Er enghraifft, mae adar y mor yn cael eu diogelu ar y tir, adar fel y llurs (Alca torda, razorbill), y gwylog (Uria aalge, guillemot), y gwylog ddu (Cepphus grylle
, black guillemot) a'r pal (Fratercula arctica, puffin) a'r hugan (Sula bassana, gannet), ond does 'na ddim yr un math o warchodaeth iddyn nhw allan ar y mor.
With the possible exception of a few islands south of the State, the Maine islands also provide black guillemots (Cepphus grylle
), Leach's storm petrels (Oceanodroma leucorhoa), and common eiders (Somateria mollissima) their southernmost breeding territories in North America.
Nine species bred regularly on the island, probably in every year: Common Eider (Somateria mollissima), Northern Fulmar, Black-legged Kittiwake, Glaucous Gull, Parasitic Jaeger (Stercorarius parasiticus), Thick-billed Mprre, Black Guillemot (Cepphus grylle
), Common Raven (Corvus corax), and Snow Bunting (Plectrophenax nivalis).
Y gwylogod du (black guillemot, Cepphus grylle
) oedd y rhain, ac roedd yna dair ohonyn nhw ar y mor ar ochr dde'r cwch ac ar waethaf eu henw mae yna ddarn gwyn ar eu hadenydd ac mae eu traed nhw'n goch.
Conversely, chick-rearing has been shown to reduce adult survivorship in black guillemots (Cepphus grylle
; Asbirk 1979).
In our study, we investigated the relationships among fish size (fork length) and other biophysical parameters, such as wet and dry energy density and fraction dry mass, for Arctic cod captured by Black Guillemots (Cepphus grylle
) and Thick-billed Murres (Uria lomvia), and we compared the Hudson Bay Canadian population to the Western Beaufort Alaska population.
If delayed plumage maturation was lacking in the shorebird ancestor, optimization indicated that it arose at least twice, once in Cepphus grylle
and once in the most recent common ancestor of Strauch's (1978) plover/gull and sandpiper clades (the Charadrii and Scolopaci, respectively).
Lawrence Island contained remains of a black guillemot (Cepphus grylle
; Fay et al., 1990), and one account states that a walrus stomach was "full" of murres (age of birds not given, Nelson, 1969:354).
Observations at these colonies focused on six species, namely thick-billed murres (Uria lomvia), black guillemots (Cepphus grylle
), northern fulmars (Fulmarus glacialis), black-legged kittiwakes (Rissa tridactyla), glaucous gulls (Larus hyperboreus), and common eiders (Somateria mollissima borealis), but we had occasional observations on other species during breeding (Tables 2, 3).