. La Canadian field-naturaliste. Âge (années) Figure 4. Relation entre l'âge et la longueur du corps chez le dauphin à nez blanc (Lagenorhynchus albirostris).. La figure 5. Relation entre l'âge et la longueur du corps chez les dauphins à bec blanc (Lagenorhynchus albirostris). mals. Parfois, la glace unique-dauphins piégés ont également été signalés ; c'étaient probablement les rem- nants du groupe non observées décombres. De même, au début du printemps des découvertes de groupes de dauphins morts relativement frais (p. ex., le mai 1983 au point d'échouement Lance) ont été probablement le résultat de piégeages de glace non observées (Lien et al

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. The Canadian field-naturalist. Age (years) Figure 4. Relationship between age and body length in male White-beaked Dolphins (Lagenorhynchus albirostris).. Figure 5. Relationship between age and body length in female White-beaked Dolphins (Lagenorhynchus albirostris). mals. Occasionally, single ice-entrapped dolphins were also reported; these were probably the rem- nants of unobserved group entrapments. Similarly, early spring discoveries of groups of relatively fresh dead dolphins (e.g., the May 1983 stranding at Point Lance) were probably the result of unobserved ice entrapments (Lien et al. 1983). Strandings Strandings of White-beaked Dolphins which were not known to have been entrapped or driven ashore by ice are shown in Table 2 and Figure 1. A total of nine strandings were repotted; five of these involved groups of animals. There were three strandings of live animals. None of these dolphins were measured or autopsied. Entrapments in Fishing Gear Very few White-beaked Dolphins were reported as incidentally caught in fishing gear (Table 3) but these data probably under-estimate actual catches. The inci- dental capture of dolphins by inshore fishermen in Newfoundland and Labrador is common (Lien et al. 1994); however, since dolphin entrapments generally cause little gear damage and the dolphins are fre- quently eaten, fishermen have little motivation to report these catches (Lien et al. 1994; Lien 1994). Observations of Ice-entrapped Dolphins Many of the dolphins from both the Port-aux- Basques and Point Verde ice entrapments had severe scrapes and cuts from the ice. The beaks and heads of many dolphins had been abraded when the head was pushed between ice pans into the air to breathe. Bloody froth was typically found in the lungs. Six ani- mals had liver mptures, serious abdominal bleeding or broken ribs. One had a deep gash on its side and a rup- tured stomach. These injuries were caused by crushing between ice pans. Except for the animals which were euthanize

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