TY  - JOUR 
T1  - Humpback whale <i>Megaptera novaeangliae</i> (Cetartiodactyla: Balaenopteridae) group sizes in line transect ship surveys: An evaluation of observer errors
JO  - Zoologia (Curitiba)
A1  - Bortolotto, Guilherme A.
A1  - Danilewicz, Daniel
A1  - Andriolo, Artur
A1  - Zerbini, Alexandre N.
SN  - 1984-4670
UL  - 10.1590/S1984-4689zool-20150133
VL  - 33 
Y1  - 2016
PB  - Brasil 
ER  -