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JamesWood

Scientific Photo Expert
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    102
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About JamesWood

  • Rank
    Wolf Eel
  • Birthday 03/22/1972

Contact Methods

  • Website URL
    http://www.thecephalopodpage.org/
  • ICQ
    0

Profile Information

  • Gender
    Male
  • Location
    Waikiki, Hawaii

Additional Info

  • Show Country Flag:
    United States
  • Camera Model & Brand
    Canon 20d
  • Camera Housing
    Ikelite
  • Strobe/Lighting Model & Brand
    2 DS-125, Nikon 105, slave flashes
  • Accessories
    ultralight and ike
  • Industry Affiliation
    Waikiki Aquarium
  1. In the spirit of the only dumb question is the one you don't ask. . . The Blackmagic site says that we can Canon or Nikon lenses on their system with a readily available adapter. That sounds great as these lenses are good quality and have the distinct advantage of being already paid for. What is the disadvantages? Lack of ports for UW use?
  2. Nice picts Tim. The red and brown is the "normal" chromatophore system at work. As it is directly controlled from their brain, they can change colors in fractions of a second. The blue eye spot is from iridescence, a different system. We sometimes see a similiar stripped pattern in swimming O. vulgaris (common octopus) in the Caribbean. I think it may mimic a local parrot fish. James
  3. Interesting topic - scientist do the work and write the ms and also review them but publishers claim copyright. Of course, without publishers most ms would not see the light of day but that is changing. With PDFs the publication and distribution costs are much lower. Newer fully online journals allow scientists a lot more liberty to share their work. Also some journals now have blind reviews - another step in the right direction. My work focuses primary on cephalopods and as much as possible (Exa. I post my work until someone complains) is available online here: http://www.thecephalopodpage.org/JWood/cv.php If you are suffering from insomnia, I highly recommend my 300+ page thesis. . . James Publications Peer Reviewed Byrne, R.A., Wood J.B., Anderson R.C. and Griebel U. 2010. Non-invasive methods of identifying and tracking wild squid. Ferrantia 59, 22-31. Get the pdf Wood J.B., Pennoyer K.E. and Derby C. D. (In press) Ink is a conspecific alarm cue in the Caribbean reef squid, Sepioteuthis sepioidea. Journal of Experimental Marine Biology and Ecology Anderson R.A., Wood J.B., Mather J. (In press) Diet of Octopus vulgaris in the Caribbean: Variety is the spice of life. MEPS Zeeh K.M. and Wood J.B. (In Press) Impact of Visible Implant Elastomer Tags on Growth Rates of Captive Caribbean Reef Squid (Sepioteuthis sepioidea). Fisheries Research. Replinger S.E. and Wood J.B.. (2007) A preliminary investigation of the use of subcutaneous tagging in Caribbean reef squid Sepioteuthis sepioidea (Cephalopoda: Loliginidae). Fisheries Research. Vol 84, 308-313. Melzner F., Forsythe J.W., Lee P.G., Wood J.B., Piatkowskia U. and Clemmesena C. (2005) Estimating recent growth in the cuttlefish Sepia officinalis: Are nucleic acid based indicators for growth and condition the method of choice? JEMBE. 317: 37-51. Get the pdf Semmens J.M., Pecl G.T., Villanueva R., Jouffre D., Sobrino I., WoodJ.B. and P. R. Rigby. (2004) Understanding octopus growth: patterns, variability and physiology. Marine and Freshwater Research. 55, 367-377. Get the pdf Wood J.B. and Anderson R.A. (2004) Interspecific evaluation of octopus escape behavior. Journal of Applied Animal Welfare Science. 7(2), 95-106. Get the pdf Wood J.B., Byrne R.B. Monks N. (2003) Coleoid cephalopods through time and cyberspace: using CephBase to examine behavior and selection. Berliner Geowissenschaftliche Abhandlungen. 3: 261-266. Get the pdf Byrne R.A., Griebel U., Wood J.B. and Mather J.A. (2003) Squid say it with skin a graphical model for skin displays in Caribbean Reef Squid (Sepioteuthis sepioidea). Berliner Geowissenschaftliche Abhandlungen. 3: 29-35. Anderson R.A., Wood J.B. and Byrne R.A. (2002) Octopus senescence: the beginning of the end. Journal of Applied Animal Welfare Science. 5(4): 275-283. Anderson R.A. and Wood J.B. 2001 Enrichment for giant pacific octopuses: happy as a clam? Journal of Applied Animal Welfare Science. 4: 157-168. Get the pdf Adamo S.A., Brown W.M., King A.J., Mather J., Mather L., Shoemaker K.L., and Wood J.B. 2000 Agonistic and reproductive behaviours of the cuttlefish Sepia officinalis in a semi-natural environment. Journal of Molluscan Studies. 66: 417-419. Wood J.B., Day C.L., Lee P.G., and O'Dor R.K. 2000. CephBase: testing ideas for cephalopod and other species-level databases. Oceanography 13(3):14-20. Wood J.B. and O'Dor R.K. 2000. Do larger cephalopods live longer? Effects of temperature and phylogeny on interspecific comparisons of age and size at maturity. Marine Biology 136(1): 91-99. Get the pdf Wood J.B. 2000. The natural history of Bathypolypus arcticus (Prosch), a deep-sea octopus. PhD Thesis, Dalhousie University. Get a pdf copy, 14.5 MB) Wood J.B. and Wood D.A. 1999. Enrichment for an Advanced Invertebrate. The Shape of Enrichment. 8(3): 1-5. Wood J.B., Kenchington E. and O'Dor R.K. 1998. Reproduction and embryonic development time of Bathypolypus arcticus, a deep-sea octopod (Cephalopoda: Octopoda). Malacologia 39(1-2): 11-19. Books Mather J.A., Anderson R.C. and Wood J.B. 2010. Octopus: The Ocean's Intelligent Invertebrate. Timber Press. 240pp. Reports and book chapters Wood J.B. and Jackson K.J. 2005 Bermuda's Marine Biodiversity. In: Caribbean Marine Biodiversity: The Known and the Unknown. Miloslavich P. and Klein E.(EDS). DEStech Publications, Inc., Lancaster, PA. 324pp. Wood J.B., Zhang P.Y., Costello M.J. and Grassle F.J. 2005 An introduction to OBIS (www.iobis.org). In: Caribbean Marine Biodiversity: The Known and the Unknown. Miloslavich P. and Klein E. (EDS). DEStech Publications, Inc., Lancaster, PA. 324pp. Wood J.B., O'Dor R.K. and U. Piatkowski. 2001 Introduction to CephBase www.cephbase.utmb.edu ACP-EU Fisheries Research Report No. 8, ACP-EU Fisheries Research Initiative, ISSN 1025-3971, 44-49. Get the pdf Piatkowski U. and Wood J.B. 2001 Cephalopods: What makes them an ideal group for an Internet database. ACP-EU Fisheries Research Report No. 8, ACP-EU Fisheries Research Initiative, ISSN 1025-3971, 39-43. Get the pdf Popular Anderson R.C. and Wood J.W. 2009. Feeding Octopuses Live Crabs is Good Enrichment. Drum and Croaker. Vol. 40, pgs 9-11. Wood J.B. and Anderson R.C. (2009) Keeping captive cephalopods. Marine Fish and Reef USA. 11: 18-31. Wood J.B. and Joshua Wiegert . (2008) Coral Reproduction. Marine and Reef USA Wood J.B. and Zeeh K.M. December (2007) Fluorescence: Aquarium Glow Lights. Freshwater and Marine Aquarium Magazine. Wood J.B. and Zeeh K.M. March 2007. Bioluminescence: Fireworks in the Night. Freshwater and Marine Aquarium Magazine. Worthington R. and Wood J.B. 2003 Top 50 Signs That Your Octopus is Getting Out of Hand. Freshwater and Marine Aquarium Magazine. Wood J.B. 2002 What we don't know about nautilus. Tentacle, no. 10, Jan. 2002, pgs 22-23. Wood J.B. 1999. The Importance of Stability in Aquariums. Freshwater and Marine Aquarium Magazine. vol. 22, no. 4. Wood J.B. and Wood D.A. 1998. James's Rearing Chambers. Freshwater and Marine Aquarium Magazine. vol. 21, no. 12. Wood J.B. 1998. Cuttlefish Husbandry. Freshwater and Marine Aquarium Magazine. vol. 21, no. 7-10. Part 1, July 1998 Part 2, Aug. 1998 Part 3, Sep. 1998 (plus cover photo) Part 4, Oct. 1998 Wood J.B. 1995. Raising and Rearing Octopus briarieus In: The Journal of Maquaculture (The Breeder's Registry) . vol. 3, no. 2. Wood J.B. 1994. Don't Fear the Raptor; an Octopus in the Home Aquarium. Freshwater and Marine Aquarium Magazine. vol. 17, no. 4. Wood J.B. 1991. Carpet Crisis. Freshwater and Marine Aquarium Magazine. vol. 14, no. 11.
  4. Unfortunately the image links appear to be broken - I'd really like to see your images. One thing I would be looking for is if the red color appears metallic. As far as I know, cephalopods are not fluorescent (absorbing one color of light and re emitting it as another) but are iridescent (differential refraction of light). The red anemone at 100 feet as well as the colors of many corals under uv light are great examples of fluorescence. The metallic color of many insects, especially certain metallic blue butterflies, is a good example of iridescence. Soap bubbles and oil on water are also examples. Iridescence is directional - change your viewing angle and the colors you see likely change. Color from pigments (most things) and from iridescence doesn't behave like that. Cephalopods also have an iridescent system that is separate from their better studied chromatophore system. Unlike buttefly wings which are fixed, cephalopods can turn there iridescent system on an off! Both iridescence and fluoresce can be very difficult to photograph. For iridescence you generally need to be shooting available light. What you see is not what you get when your strobes chance the angle and properties of the incoming light. For fluorescence, you may need to shot available light (its dim at 100 ft) or supply the “right” spectrum of light (often uv) and add a filter to your camera to block undesirable noise. James B. Wood PhD Wetpixel Science Moderator (who should check in more often!) The Cephalopod Page Webmaster
  5. Opening: Research Associate (Aquarium Biologist) at Waikiki Aquarium (a great location for UW photographers!). If you are interested, please pay very close attention to the job requirements as they are critical. http://www.pers.hawaii.edu/wuh/nadvert.asp...ate&so=desc
  6. How does the GoPro in an Eye of Mine housing compare to a Flip HD or JVC camera in an Ikelite housing? James
  7. My 20d has died. Looks like it is time to upgrade. . . Drat. On the plus side, there will be plenty of chances to use an UW camera here! Thanks for the replies. James
  8. I have a 20d in an Ike housing. Are there similarly shaped Cannon cameras or will I need an entirely new housing if I upgrade my camera?
  9. We did not test that but my guess is that that they would react to a squirt of any dark colored ink. James
  10. New Scientist featured a recent publiation on squid ink as an alarm signal. In this series of experiements we used video to both record experimental trials and to communicate our results. I suspect that part of the reason that this work was featured was the image and videos. http://environment.newscientist.com/channe...heir-lives.html I strongly encourage all Wetpixel members that are scientists, educators or divers to fully utilize their underwater photography skills when sharing their love for the marine environment with others. We have an ability to let people see what we see through our photography. Cheers, James
  11. We ran an experiment where we setteled the planula of two species of coral and monitered their growth under the same lab conditions (open system) for a year and there still was a lot of variation in size.
  12. Nice video footage. I'm glad to see them make it available.
  13. Alex,this is a really great idea for a number of reasons. I'd like to run with it a bit further. One thing that is slowly changing in science is the use of images instead of preserved specimens in some museum collections. I can't think of a better flagship group than cephalopods since they change color, shape and texture – and all of that information is lost when you preserve (kill) one and stick it in a jar. So the top quality images and locations posted here are great! One step further, however, would be if the photographers would kindly provide a latitude, longitude and depth to accompany their images and text descriptions of location. This information in a scientific database like: http://www.cephbase.utmb.edu/biogeo/latlong.cfm?CephID=660 Can easily produce visualization tools like: http://hercules.kgs.ku.edu/website/Specime...pecies=arcticus FYI, the example above is for a deep-sea octopus that was thought to be somewhat rare but I think is actually quite common; it just lives in depths where most people would never encounter it. Cheers, James PS I hope to add my own picts to the list by the end of the year.
  14. The low teck solution. I bought a very old style tripod with some issues at a garage sale for $3 for the purpose of taking it underwater. Once I found and removed the clump of fossilized masking tape out of the gears it actually worked pretty smoothly. I then painted it black and put some thick boat grease on all the working parts. The tripod was deployed 20 feet down and I used a second weight belt with lots of lead to hold her down. What I wanted to capture was some sort of pattern of luminescence in the turbulence as the currents swept plankton by the pillars of a large bridge at night. What I got was a set of very artistic and weird green Xfiles like images with most of the light coming from a light 100 feet up on the bridge – it wasn't that bright but obviously it was the brightest thing around during the long exposures. The tripod was rinsed off afterwards and was fine – I haven't tried an underwater night shot since but I'd like to. This was done with a Nikonos V with a 15 mm so it was easy to connect to the tripod and the camera had much less surface area for the current to push on than my 20d ike rig. The tripod legs were placed on the sand facing the bridge pillars; no visible life forms were harmed in the creation of the images or this email.
  15. The 1970's manual has the equation Z* = (1.6 times the square root of (ASA times Watt Seconds))/Aperature They don't define Z*, it is on a log scale, I though it was distance from flash to subject. . . Maybe Z* is the amount of turbidity? With 100 Watt seconds, 200 ASA and f11 they say you can correctly expose a subject 23 feet away – which seems like one heck of a lot of light to me! I get 14 feet when I try it. . . hmmm that is what is on the X axis. So Z* must be turbidity? The actual strobe is 50 WS, not 100 and the film will be 100, not 200. So, at f11 I should get a correct exposure at: 10.6 feet (wow!???) Seems to high for a 2 stop loss. Guide number, which is independent of area of coverage as you mentioned is GN = Distance * Aperture (at a set ASA/ISO). It is an easy way to do exposures if you aren't on TTL. I'm just trying to get into the ball park here. . . apples and oragangs. . . So that equation gives me a correct theoretical exposure at 2.5 feet, not 10.6 feet! Who knows how much the beam is focused by the big reflector. It looks like I'll have to shoot a series when we get it working and find out, at least I have a reasonable range to play with. Also, it looks like the 28 mm lens may be wider than the flash coverage. Thanks!
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