Vertebrate of BC Part 2 Flashcards Preview

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Flashcards in Vertebrate of BC Part 2 Deck (484)
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241

Cetacean live capture

endangered southern residents for zoo/marine park
primary destabilization
over capture of almost all marine organisms

242

Cetacean tourism

whale watching, marine parks, aquariums
effects of acoustics not well known

243

Cetacean entanglement

follow prey into traps, derelict fishing gear

244

Cetacean pollution

lipophilic chemicals stick to blubber- especially calves

245

persistence (pollution)

affects duration in environment after release

246

volatility (pollution)

affects transport in atmosphere

247

water solubility (pollution)

affects transport in rivers, runoff, ocean currents

248

bioaccumulation potential (pollution)

affects concentrations at higher trophic levels

249

Cetaceans, climate change

reduced arctic sea ice- move into foraging area sooner-- larger more robust offspring
CO2 emissions, acidification, implications for cetaceans not well known

250

Cetaceans, vessel traffic

major increase- strikes, noise
behavioural changes, auditory disturbance, interactions
go through 'best whale routes'

251

ocean noises (Hz)

seismic 1-100
ship traffic 10-1kHz
bubbles/spray 100-100kHz

252

ocean hearing (Hz)

seals/sea lions-100-100kHz
Baleen whale- 10-10kHz
Dolphin- 100-100
Porpoise- 1kHz-100kHz

253

hydophone

set up to listen to whale migration
400lb anchor chain
acoustic release
deployed hyrdophone

254

AMAR

Autonomous Multichannel Acoustic Recorder

255

AMAR deployment

February & May 2015
64&133 days recording
~50&20m water depth
Flores island (feeding ground)

256

grey whale migration

S (breeding) - N (feeding)

257

considerations with AMAR

can't be too close to shore (wave noise)

258

acoustic release system/ pop-up

'call' the pop-up and the 'egg' separates and reals the line back in

259

ocean glider movement

ballast- changing weight, takes on water to sink

260

winter population estimate of cougars in southeastern BC

3.5 cougars/100km^2

261

average home range of male cougar in southeastern BC

151km^2

262

Current cougar populations

declining
increased conflicts btw cougars/humans
92% of mortalities in collared cougars from hunting
average survival rate 59%

263

cougar reproduction stat

average litter 2.53
inter birth interval 18mnth
75% of females reproductively successful

264

Canada Lynx

Lynx canadensis
nocturnal, solitary, ambush, pursuit, mostly canadian shield area (prevalent hare), hunted for pelt

265

Lynx prey

snowshoe hare, rodents, birds

266

cougar unique pelage

unique that it is always the same across wide range of habitats

267

cougar physiological jumping mechanisms

disproportionately large pelvic apparatus for leaping (frog-like)

268

BC Canidae

Grey Wolf
Coyote
Red Fox

269

Wolf paw

middle pads > outside pads
dogs opposite

270

Canada phylogeny

(Dog - Grey wolf) - coyote
sister groups
red fox far separated