. Cetacei delle Channel Islands National Marine Sanctuary / preparati per la National Oceanic and Atmospheric Administration, Channel Islands National Marine Sanctuary e NOAA, National Marine Fisheries Service da Stephen Leatherwood, Brent S. Stewart, Pieter A. Folkens. Le balene in California per le Isole del Canale.. nella parte anteriore del foro di sfiato in prossimità della punta del muso. (L'Humpback Whale mediano del crinale rostrale è oscurato da molte manopole - resem- bling sovradimensionati rivetti - sparsi attorno alla testa, alcuni dei quali sono situati lungo la linea mediana). In Bryde la balena, la testa singola cresta caratteristica del

• Collaboratore: Library Book Collection / Alamy Foto Stock
• ID dell’immagine: RJDYJK
• Dimensioni dei file: 7,1 MB (421,1 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 3122 x 800 px | 26,4 x 6,8 cm | 10,4 x 2,7 inches | 300dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Cetaceans of the Channel Islands National Marine Sanctuary / prepared for National Oceanic and Atmospheric Administration, Channel Islands National Marine Sanctuary and NOAA, National Marine Fisheries Service by Stephen Leatherwood, Brent S. Stewart, Pieter A. Folkens. Whales California Channel Islands.. in front of the blowhole to near the tip of the snout. (The humpback whale's median rostral ridge is obscured by numerous knobs - resem- bling over-sized rivets — scattered about the head, some of which are located along the midline). In Bryde's whale, the single head ridge characteristic of the other rorquals is supplemented by two auxiliary ridges, one on each side of the main ridge. Faint lateral ridges can sometimes be detected on the rostra of fin and blue whales. Recent studies have revealed intergrades of a number of features of this group (e.g., ridges and baleen characteristics), which sometimes confound identification even when fragments of a specimen are in hand. At sea, these whales often appear very similar and must be examined carefully before they can be identified with confidence. Observers should not feel overly disappointed about not being able to make a reliable idetification. There is enough overlap in the behavior of these whales and in the appearance of their surfacing profiles to dictate caution in using any single haracteristic for positive identification. Depending on the animal's activities, the following features may be useful in distinguishing the balaenopterids from one another: i) the size, shape, and position of the dorsal fin and the timing of its appearance on the surface relative to the animal's blow (in general, the larger the whale, the smaller the dorsal fin, the farther back its position, and the later its appearance on the surface after the animal's blow); 2) the height of body in the area of the dorsal fin which is exposed as the animal sounds, relative to the size of the dorsal fin; 3) sometimes the blow rate and movement

Parole chiave associate all'immagine

• bookcentury1900
• bookcollectionamericana
• bookdecad
• bookyear1987