ML147675
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Subject 1: (Interview). Subtitle: Jane Marks. Timecode In: 00:11:47. Timecode out: 00:48:26. Notes: Biology, conservation discussion. Subject 2: (Interview). Subtitle: Arturo Contreras. Timecode In: 00:11:47. Timecode out: 00:48:26. Notes: Biology, conservation discussion. Subject 3: (Sound Effects). Subtitle: Splashing water. Timecode In: 00:56:24. Timecode out: 00:59:50. Subject 4: (Environmental Recording). Subtitle: Cuatro Cienegas biological reserve. Timecode In: 01:03:02. Timecode out: 01:04:47. Subject 5: (Sound Effects). Subtitle: Children playing in water. Timecode In: 01:04:48. Timecode out: 01:09:39. Equipment Notes: Subjects 4-5 are decoded MS stereo. NPR/NGS RADIO EXPEDITIONS Show: Cuatro Cienegas Log of DAT #: 2 (July 23, 2001) Engineer: Shawn Fox Date: August 6, 2001 SC: Shawn Fox ¿ JG: Jessica Goldstein ¿ J: Jane, the scientist ¿ JB: John Burnett ¿ A: Arturo 0:00 - 2:54 Blank tape 3:05 amb - faint walking, cicadas - "which one's this called" - "mojorado" 3:51 JG, "Now, be quiet everybody¿" 4:06 Cicadas, general same level background nature noise - not really distinguishable 5:00 Guy talking, then Shawn grumbling b/c nobody can stay quiet¿ 5:00 - 9:00 Talking about where to go, arranging hydrophones, etc. 9:01 - 11:03 Chatting with Jane, more arranging. 11:03 - 11:24 Silence 11:46 My name's Jane Marks and I'm a professor of biology at Northern Arizona University and we are presently standing in waist-deep water in Mojoral Oeste, which is one of the bigger pozas in the Cuatro Cienegas Basin. 12:05 JB: How many years have you worked in Cuatro Cienegas? J: About four years¿ 12:15 JB: It's about two o'clock in late July. What have you learned as a scientist? J; As of two o'clock today I've learned that we've done two major things¿ H: I mean¿where do you like to be at this hour of the day? 12:37 J: The reason we're standing waist-deep in water is because I've learned the hard way that the best place to be at 2 o'clock in the afternoon in the middle of the Chihuahuan Desert is in the water. It's quite hot here but it's quite comfortable when you're in the water. .. 12:51 We're standing here beside one of our big experiments that we've set up where we're looking at the effects of exotic species on the native species. 12:59 And there's one exotic species here that we're particularly concerned about which is - its scientific name is hemi chromus guthatus (sp?) and it's an African cyclid fish. And we're worried that it's potentially competing with some of the native fish and so we've got an experiment set up where we're standing by about 30 meter sq. enclosure, some of which just have the native fish in them, some of which have the native and the exotic fish, and so we're going to compare growth rates of the native fish in the presence and the absence of the exotic fish to see if the exotic fish is having any negative consequences on the growth and reproduction and success of the native endemic cyclid. 13:48 So, this cage¿If you look inside this cage you see that it's a four-sided cage and the bottom is just open to the natural substrate, and you can see some fish swimming around and - there's one right there - one of the native fish¿and then probably tucked away underneath the lilies are some of the exotic fish. And so we weighed and measured our native fish and our exotic fish before, when the experiment began and then afterwards, after about three months, we'll harvest the experiment, which means that we'll take out the native and the exotic fish and weigh and measure them and we'll see if the growth rates of fish in this enclosure that has exotic fish are as high as they are when you don't have any exotic fish. 14:40 14:40 JB: Why is it important to know how native and non-native fish co-habitate? 14:48 - 15:48 J: Well, one of the main threats to aquatic biodiversity is the in... (Notes truncated)
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- 15 Jan 2010 - David McCartt
- Digitized
- 15 Jan 2010 - David McCartt
- Edited
- 15 Jan 2010 - David McCartt