SHORT‐TERM EFFECTS OF BOAT TRAFFIC ON BOTTLENOSE DOLPHINS,TURSIOPS TRUNCATUS, IN SARASOTA BAY, FLORIDA Tập 17 Số 4 - Trang 673-688 - 2001
Stephanie M. Nowacek, Randall S. Wells, Andrew R. Solow
AbstractCoastal cetaceans are subject to potential injury or disturbance from
vessels. In Sarasota, Florida, where about 120 resident bottlenose
dolphins,Tursiops truncatus, share the inshore waters with over 34,000
registered boats, disturbance potential is high. We assessed specific behavioral
responses of individual dolphins to boat traffic. We conducted focal animal
behavioral observations dur... hiện toàn bộ
RESPONSES BY HECTOR'S DOLPHINS TO BOATS AND SWIMMERS IN PORPOISE BAY, NEW ZEALAND Tập 15 Số 3 - Trang 738-750 - 1999
Lars Bejder, Steve Dawson, John Harraway
AbstractTheodolite tracking (61 d; 251 h) was used to quantify dolphin reactions
to boats and swimmers in the austral summers of 1995‐1996 and 1996‐1997.
Dolphins were accompanied by swimmers (within 200 m) for 11.2% of the total
observation time, whereas boats accounted for an additional 12.4%. Dolphins were
not displaced by either of these activities. Swimmers caused only weak,
non‐significant e... hiện toàn bộ
Global threats to pinnipeds Tập 28 Số 2 - Trang 414-436 - 2012
Kit M. Kovacs, Àlex Aguilar, D. Aurioles, Vladimir N. Burkanov, Claudio Campagna, Nick Gales, Tom Gelatt, Simon D. Goldsworthy, Simon J. Goodman, G. J. Greg Hofmeyr, Tero Härkönen, Lloyd F. Lowry, Christian Lydersen, Jan Schipper, Tero Sipilä, Colin Southwell, Simon N. Stuart, David Thompson, Fritz Trillmich
Seascapes of fear: evaluating sublethal predator effects experienced and generated by marine mammals Tập 24 Số 1 - Trang 1-15 - 2008
Aaron J. Wirsing, Michael R. Heithaus, Alejandro Frid, Lawrence M. Dill
AbstractThe notion that predators can affect their prey without killing them is
widely supported in the ecological literature yet rarely applied by marine
mammal studies. We present three case studies in which patterns of time
allocation by individual marine mammal foragers were used to index the sublethal
effects of predators on bottlenose dolphins (Tursiops sp.), harbor seals (Phoca
vitulina), a... hiện toàn bộ
Diel variation in beaked whale diving behavior Tập 24 Số 3 - Trang 630-642 - 2008
Robin W. Baird, Daniel L. Webster, Gregory S. Schorr, Daniel J. McSweeney, Jay Barlow
AbstractWe investigate diel variation in beaked whale diving behavior using data
from time–depth recorders deployed on six Blainville's (Mesoplodon densirostris)
(255 h) and two Cuvier's (Ziphius cavirostris) (34 h) beaked whales. Deep
foraging dives (>800 m) occurred at similar rates during the day and night for
Blainville's beaked whales, and there were no significant diel differences in
ascent ... hiện toàn bộ
Olfaction and brain size in the bowhead whale (Balaena mysticetus) Tập 27 Số 2 - Trang 282-294 - 2011
J. G. M. Thewissen, John C. George, Cheryl Rosa, Takushi Kishida
AbstractAlthough there are several isolated references to the olfactory anatomy
of mysticetes, it is usually thought that olfaction is rudimentary in this
group. We investigated the olfactory anatomy of bowhead whales and found that
these whales have a cribriform plate and small, but histologically complex
olfactory bulb. The olfactory bulb makes up approximately 0.13% of brain weight,
unlike odon... hiện toàn bộ
THE USE OF NATURAL MARKINGS IN STUDIES OF LONG‐FINNED PILOT WHALES (GLOBICEPHALA MELAS) Tập 23 Số 1 - Trang 77-93 - 2007
Marie Auger‐Méthé, Hal Whitehead
AbstractPhoto‐identification using natural markings has been used for pilot
whale (Globicephala melas) studies. However, none of these studies investigated
the reliability of the marks used. To identify which mark types are reliable and
which could improve the method, fifteen mark types, and their distribution
within the population, were described. The rates of gain and loss of each mark
type were... hiện toàn bộ