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Photo Identification of Marine Mammals MARE 390 Dr. Turner.

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Presentation on theme: "Photo Identification of Marine Mammals MARE 390 Dr. Turner."— Presentation transcript:

1 Photo Identification of Marine Mammals MARE 390 Dr. Turner

2 Photo ID Marked animals prereq. of behavioral studies in 1950s and 60s Identification of wild-animals via natural marks Useful in long-term studies Large & long-lived vertebrates

3 Photo ID in Marine Mammals First record in marine mammals Orca from Australia – late 1800s Whalers & Fishermen documented 27 Many early records were anomalously white animals Or severely damaged fins

4 Photo ID in Marine Mammals Studies using subtle natural markings in fins & flukes began in early 1970s Killer whales, Humpbacked Dolphins, Sousa, Bottlenose Dolphins, Spinner Dolphins Humpback whales & Right whales

5 Photo ID in Marine Mammals Real benefit of technique are long-term studies can identify relationships: social & sexual Photogrammetry – measuring the size and spacing of animals

6 Photo ID Methods Distinctive features – trailing edge of dorsal fin - works well in some species – Tursiops > 50% identifiable - others (Spinner, Dusky, Pilot, Porpoises) < 20% Longevity and Changeability of marks critical

7 Photo ID Methods Longevity and Changeability of marks critical Wounds and Scars Wounds heal rather quickly Scars last for life Cookie-cutter shark bites Intra-specific agression

8 Photo ID Methods Viewing animals: From Shore non-invasive, inexpensive information on individuals limited Camera or Theodolite tracking From Airplanes Somewhat invasive & expensive

9 Photo ID Methods Viewing animals: From Boats Most practical, most invasive Other formats Underwater Cameras Video Cameras

10 Photo Analysis Negatives, prints, digital images Tracings, eye, microscope Examine shape, markings, leading/trailing edge

11 Photo Analysis Stored with similar fins/flukes in folders 1, 2, 3 notches Damaged fins Black, white, black & white flukes

12 Dorsal Ratio

13 Photo Analysis

14 Beluga whale – scars on body Killer whale – dorsal fin shape Saddle pigmentation

15 Photo Analysis Pilot whale – nicks, scratches, scars, pigments on body and back Humpbacked dolphin – scars on back, flank, dorsal fin

16 Photo Analysis Atlantic white sided dolphin – scars and nicks, on dorsal fins; unusual pigment patterns Dusky dolphin – scars and nicks, on Dorsal fins; unusual pigment patterns

17 Photo Analysis Pacific white sided dolphin – scars and nicks, on dorsal fins; white individuals Bottlenose dolphin – nicks, scars and pigment spots on dorsal fin

18 Photo Analysis Rissos dolphin – pigment patterns, nicks on dorsal fin, scars on back Spinner dolphin – scars and marks on dorsal fin

19 Photo Analysis Atlantic spotted dolphin – fin and fluke marks; body spot patterns Pan tropical spotted dolphin – fin and fluke marks; body spot patterns

20 Photo Analysis Heavisides dolphin – white animals, dorsal fin marks Hectors dolphin – dorsal fin nicks

21 Photo Analysis Harbor porpoise – dorsal fin scars and nicks, and pigment areas Dalls porpoise – dorsal fin pigmentation, color anomalies, dorsal fin deformities

22 Photo Analysis Baiji – dorsal fin scars and nicks, and pigment areas Blainsvilles beaked whale – dorsal fin notches, white oval scars from cookie-cutter sharks, linear scars from intraspecific interactions

23 Photo Analysis Right whale – pattern of callosities Bowhead whale – pigment patterns

24 Photo Analysis Sperm whale – dorsal fin scars and nicks, and pigment areas Blue whale – dorsal fin scars and nicks, cookie- cutter shark scars

25 Photo Analysis Humpback whale – dorsal fin scars and nicks, cookie-cutter shark scars

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