Latest / Why We Do What We Do / Mini: Magestic Manatees
Transcript
- 0:03Speaker 1: You're listening to Why we do what we do.
- 0:15Speaker 2: Welcome to Why we do what we do Mini. I'm
- 0:18Speaker 2: your host Abraham and I'm your oh Shane. We are
- 0:21Speaker 2: a psychology podcast. We talk about the things that humans
- 0:25Speaker 2: and especially today what non humans do, and we bring
- 0:30Speaker 2: some science of psychology to that discussion.
- 0:33Speaker 3: That's what we do.
- 0:34Speaker 1: Yes, yes, we do.
- 0:35Speaker 4: So today we are talking about the majestic creature that
- 0:38Speaker 4: is known as the mermaid, I mean manatee.
- 0:42Speaker 3: Yes indeed.
- 0:43Speaker 2: And if you are joining us for the first time,
- 0:45Speaker 2: we hope that you enjoy what you hear in this
- 0:46Speaker 2: discussion today. And if you're a returning person, then welcome back.
- 0:50Speaker 2: I hope all that you also enjoy what you hear
- 0:52Speaker 2: in this discussion today. Another way, if you would like
- 0:55Speaker 2: to support us, you can join us on Patreon, leave
- 0:58Speaker 2: us a rating and review, like and subscribe and tell
- 1:01Speaker 2: a friend and I'll talk more about those things at
- 1:04Speaker 2: the end of this discussion. But these are minis. They
- 1:07Speaker 2: are brief, little episodes we record and then we publish
- 1:10Speaker 2: on Monday's. It's just a little thing that you can
- 1:13Speaker 2: get in there on your Monday and then go about
- 1:15Speaker 2: your day. And that's what we do.
- 1:16Speaker 3: On our minis.
- 1:17Speaker 4: Yeah, it's good time. So I hope, we hope you
- 1:20Speaker 4: like this one. This one I think is going to
- 1:22Speaker 4: be a lot of fun.
- 1:23Speaker 3: Yeah.
- 1:23Speaker 2: Yeah, we don't do a ton of creature oriented features,
- 1:27Speaker 2: but we discussed manatees recently and in one of our
- 1:30Speaker 2: recent episodes and expressed our love for them, and so
- 1:32Speaker 2: we decided we may as well just do a mini
- 1:34Speaker 2: about them because they're pretty cool creatures and creatures do behaviors,
- 1:39Speaker 2: and so it's the thing that we.
- 1:40Speaker 3: Could talk about.
- 1:41Speaker 2: Yay, I love it all right, So we are going
- 1:43Speaker 2: to quickly review some of the science of manatee behavior
- 1:46Speaker 2: and biology, some basic understandings about manatees and how they work,
- 1:51Speaker 2: and then we'll also review some of the recent research
- 1:54Speaker 2: into their cognition because people are curious about that sort
- 1:58Speaker 2: of thing. And then that puts us squarely within our
- 2:00Speaker 2: discussion space. Even though there are no rules, that makes
- 2:04Speaker 2: it make more sense to me.
- 2:06Speaker 4: Yeah yeah, yeah, the rules are arbitrary, but we make
- 2:08Speaker 4: them work.
- 2:09Speaker 2: Yes, Okay, In case you haven't seen manates, we will
- 2:16Speaker 2: do our best to describe them very quick and then
- 2:19Speaker 2: just discuss things about them that you'll need to know.
- 2:23Speaker 2: Manates I feel like look kind of similar to seals
- 2:26Speaker 2: and walruses. Sure, possibly if you threw a cow in
- 2:29Speaker 2: the water and it's evolved there made what.
- 2:34Speaker 3: They look like.
- 2:35Speaker 2: They're actually though not that closely related to seals and
- 2:39Speaker 2: walruses as it turns out.
- 2:41Speaker 4: Yeah, they're mostly related to potatoes. They're potatoes with flippers,
- 2:45Speaker 4: and they're just very large and they're adorable.
- 2:47Speaker 3: That's a great way to describe it.
- 2:49Speaker 4: Yeah, Yeah, it's like a big it's like a big
- 2:51Speaker 4: russet potato with paddles. Yeah, Now, they are a they're
- 2:55Speaker 4: very large. They're a brownish grayish corpulent pachyderm with a large, flat,
- 3:00Speaker 4: horizontal paddle style tail, and it looks like a big
- 3:04Speaker 4: like almost like a shovel shape almost where it's like rounded.
- 3:07Speaker 4: It's not like a fluke like a whale singular. And
- 3:10Speaker 4: they can get up to about thirteen feet or about
- 3:12Speaker 4: fourst meters and way up to three thousand pounds.
- 3:15Speaker 3: They are huge, yes, huge potatoes.
- 3:19Speaker 2: They don't have scales like other large aquatic creatures, and
- 3:22Speaker 2: neither do they really have fur. They have this very
- 3:25Speaker 2: very thick skin that has covered with very fine, intermittently
- 3:29Speaker 2: spaced sensory hairs though.
- 3:32Speaker 4: Yes they do, and they have like they have whiskers,
- 3:34Speaker 4: which is adorable. Yeah, they have very small dark eyes
- 3:38Speaker 4: and large basset hound lips and also those hair with
- 3:42Speaker 4: those hairs that, like I said, those whiskers, they look
- 3:44Speaker 4: like if you ever see the face of a sharpai,
- 3:46Speaker 4: they kind of look like that.
- 3:48Speaker 3: They do. Yeah, that's a good that's a good description.
- 3:50Speaker 3: I like it.
- 3:51Speaker 1: Yeah.
- 3:51Speaker 2: They are herbivores and they spend all day eating plants
- 3:54Speaker 2: in the water. They swim at a leisurely three to
- 3:58Speaker 2: four miles per hour when they're in a Yeah, they're
- 4:03Speaker 2: not particularly fast moving creatures.
- 4:05Speaker 3: They enjoy the day.
- 4:08Speaker 1: Yeah, they mosey. Yeah, it's a way to think about it.
- 4:10Speaker 4: They mosey because they don't have any natural predators, Like
- 4:13Speaker 4: they are just kind of their own thing.
- 4:15Speaker 1: And we'll talk about that.
- 4:15Speaker 4: But I've seen them come up on shore where like
- 4:19Speaker 4: they can actually get to like land grass and eat
- 4:22Speaker 4: grass on the shore as well if it's close enough
- 4:25Speaker 4: to where they're at, which is.
- 4:26Speaker 1: Really really cool.
- 4:27Speaker 4: Though they look very fat, they actually don't have any
- 4:30Speaker 4: blubber and they struggle with in colder water. As a
- 4:33Speaker 4: matter of fact, where I live, they migrate to warmer waters,
- 4:37Speaker 4: to springs and stuff like that, and they hang out
- 4:38Speaker 4: where the water is a little bit warmer during that
- 4:41Speaker 4: colder climate time.
- 4:42Speaker 2: So because of this, they're really only sort of set
- 4:45Speaker 2: up to do well in warm waters, and so they
- 4:47Speaker 2: live in warms, slow moving rivers, estuaries, saltwater bays, often
- 4:52Speaker 2: in coastal regions. Geographically, they can be found in the
- 4:56Speaker 2: southeastern United States, primarily in Florida. They can also be
- 4:59Speaker 2: fa on in the Caribbean, Central America, South America, and
- 5:03Speaker 2: Western Africa.
- 5:04Speaker 4: They generally tend to, like I mentioned before, they kind
- 5:07Speaker 4: of populate springs and stuff in Florida. I see them
- 5:10Speaker 4: a lot in those areas where like there are like
- 5:12Speaker 4: kind of like consistent water spaces. They generally stay away
- 5:15Speaker 4: from places where there's ads though, makes sense. Okay, so
- 5:25Speaker 4: we are talking about this the wonderful creature that is
- 5:27Speaker 4: demand te we mentioned earlier their packet terms, their closest
- 5:30Speaker 4: relatives are elephants. Like elephants trunks, they have prehensile lips
- 5:35Speaker 4: and that can move independently of one another, and you
- 5:37Speaker 4: can actually see that when they're eating kelp and seagrass
- 5:40Speaker 4: and stuff like that.
- 5:40Speaker 1: It's really interesting.
- 5:41Speaker 2: Yeah yeah, they could like pull it into their mouth basically,
- 5:45Speaker 2: yeah yeah, and they're apparently quite dexterous with it. They've
- 5:48Speaker 2: also described as being similar to giraffe's lips. How they
- 5:53Speaker 2: have prehensilists. Yes, yeah, I can see that, and also
- 5:56Speaker 2: similarly you might have as you might imagine, researchers have
- 6:00Speaker 2: determined and discovered that manate lips are extremely sensitive. Their
- 6:05Speaker 2: lips are as sensitive as our fingertips. And one to
- 6:09Speaker 2: test this, what they did is they trained manates to
- 6:11Speaker 2: choose between plastic plates where they had these sort of
- 6:15Speaker 2: grooves cut out of them in these vertical lines. What
- 6:18Speaker 2: they did is they trained the manates to choose the plate,
- 6:21Speaker 2: so they had two plates present, and they just had
- 6:23Speaker 2: to choose the plate to have the larger spaced out grooves, okay.
- 6:27Speaker 2: And so then they found that the manatees could detect
- 6:30Speaker 2: changes in the grooves as small as point one point
- 6:33Speaker 2: five millimeters, which is a tenth the width of a
- 6:37Speaker 2: grain of sugar.
- 6:38Speaker 1: Wow.
- 6:38Speaker 2: And some could even detect as small as point and
- 6:42Speaker 2: zero five millimeters. So they're quite quite small fine distinctions
- 6:48Speaker 2: they can make with their lips as they're sort of
- 6:50Speaker 2: feeling things and also just like a very clever way
- 6:53Speaker 2: to determine like the extent to which something can sense
- 6:59Speaker 2: something like consense changes in something is like just measure
- 7:05Speaker 2: very very small changes in them and see if they
- 7:08Speaker 2: can like consistently behave with respect to that distinction. Yeah,
- 7:14Speaker 2: that's also how they determine what colors animals can see,
- 7:17Speaker 2: by the way, Yeah, it is by messing with that
- 7:19Speaker 2: kind of stuff.
- 7:20Speaker 4: Super interesting. This lip sensitivity is actually one of the
- 7:23Speaker 4: reasons why they can be easily injured by fishing equipment
- 7:26Speaker 4: because they use their lips to explore things in their environment,
- 7:29Speaker 4: and they can often get snagged on down fishing equipment
- 7:32Speaker 4: or nets or different types of like litter that might
- 7:36Speaker 4: occur in like populated waterways.
- 7:38Speaker 2: Yeah, they're sort of searching around for food and whatnot,
- 7:41Speaker 2: and if there's a bunch of stuff just around, they
- 7:44Speaker 2: can get snared in. And then you can imagine how
- 7:46Speaker 2: painful it must be with something that sensitive to be
- 7:49Speaker 2: ensnared and down fishing equipment. So another interesting thing here
- 7:54Speaker 2: is the fine hairs that cover their body act as
- 7:56Speaker 2: sort of a passive sonar in the water. They can
- 7:59Speaker 2: detect objects and even take evasive actions as needed. Regardless
- 8:03Speaker 2: of how murky the water is because of the sensitivity
- 8:06Speaker 2: of those hairs, so like they're not actually depending on
- 8:09Speaker 2: site to determine what's around them in the water. They
- 8:13Speaker 2: can feel it like they can just they can sense
- 8:16Speaker 2: how far away and close things are, and so they
- 8:19Speaker 2: have a sense of what their environment is through that
- 8:22Speaker 2: sort of passive sonar, which is really cool.
- 8:24Speaker 1: Yeah, super interesting.
- 8:26Speaker 4: Now, despite having a license of phallic brain, all that
- 8:29Speaker 4: means they have a very smooth cortex and one of
- 8:31Speaker 4: the smallest brain the body ratios of a mammal. They
- 8:34Speaker 4: demonstrate many complex behavioral traits.
- 8:37Speaker 2: So they've discovered that these manites can learn several tasks.
- 8:41Speaker 2: They can navigate long, labyrinth like waterways that can wind
- 8:45Speaker 2: for many, many, many miles. They can even navigate great
- 8:50Speaker 2: distances through open water and can navigate seasonally. And all
- 8:54Speaker 2: of this seems to indicate that they have a really
- 8:57Speaker 2: high sensitivity to time and direction, Like they can respond
- 9:02Speaker 2: to these different cues that seem like they shouldn't be
- 9:07Speaker 2: able to if they had low cognition, which might be
- 9:10Speaker 2: implied by their brain size, but they can like remember
- 9:14Speaker 2: after a single trip. They can remember these complex waterways
- 9:20Speaker 2: where I think even most humans would get lost. They
- 9:22Speaker 2: navigate them very well, and they seem to have be
- 9:25Speaker 2: really good at navigations specifically.
- 9:28Speaker 4: Yeah, and they return to same locations every year. Like
- 9:31Speaker 4: I mentioned at the top of this, like there's a
- 9:33Speaker 4: place here called Blue Springs that is known for having
- 9:35Speaker 4: manatees come every year, and it's the same like a
- 9:39Speaker 4: lot usually the same group with some new new folks
- 9:41Speaker 4: that come in. Like we've talked about hundreds and hundred
- 9:43Speaker 4: like up to like five hundred, six hundred manatees at
- 9:45Speaker 4: a time of nice, Like it's it's wild, it's really cool. Further,
- 9:49Speaker 4: they have demonstrated that their navigation skills are learned in
- 9:51Speaker 4: part from their parents, as young raised without their parents
- 9:55Speaker 4: struggle to navigate those environments, So they actually learn and
- 9:58Speaker 4: navigate these through this like observational behavior.
- 10:01Speaker 2: Yeah, and it seems like there is some other social
- 10:05Speaker 2: contingencies that they have that help them learn this, Like
- 10:10Speaker 2: I think they're taught some like strategies somehow as they
- 10:13Speaker 2: go by, like having a mentor, which is really cool.
- 10:16Speaker 2: So whether or not they're doing anything that even remotely
- 10:19Speaker 2: approximates language, we don't know, but it is interesting that
- 10:24Speaker 2: their social environment helping them navigate is kind of unique
- 10:28Speaker 2: and again something you wouldn't expect if they did have
- 10:31Speaker 2: lower cognition, which many people thought because they had smaller
- 10:34Speaker 2: brains and smoother brains, right, but they actually do these
- 10:37Speaker 2: really cool things. Just a fun fact about their young
- 10:41Speaker 2: since we're talking about them, So, manatees have a full
- 10:45Speaker 2: year gestation.
- 10:46Speaker 3: So humans are nine months.
- 10:47Speaker 2: Manites go a full year and they raise their calves
- 10:50Speaker 2: for about two years and they're nursing that entire time,
- 10:53Speaker 2: and they'll start actually seeking out mates and breeding when
- 10:56Speaker 2: once they reach around.
- 10:57Speaker 3: Five years old.
- 10:58Speaker 2: It's like four ish years for females and five or
- 11:02Speaker 2: six years for males, but that's about when they start
- 11:04Speaker 2: seeking partners, I guess, yeah, and then they might if
- 11:09Speaker 2: they're successful in their mating seasons, have a calf approximately
- 11:14Speaker 2: every five years or so. They don't have a lot
- 11:17Speaker 2: of babies, is what we're saying here.
- 11:19Speaker 1: Yeah, they don't have a lot of babies. Here's another
- 11:21Speaker 1: fun fac too.
- 11:21Speaker 4: They nurse their milk lands and their nipples are under
- 11:24Speaker 4: their armpits, so like they nurse underneath their like flippers,
- 11:27Speaker 4: the flipper four flippers, their flipper pits. Yeah, super cool now,
- 11:31Speaker 4: most manatees only live to be about thirty or forty
- 11:34Speaker 4: years old in the wild in most cases, but have
- 11:36Speaker 4: been documented to live up to sixty nine years old,
- 11:38Speaker 4: particularly if taken care of in captivity.
- 11:41Speaker 2: Yeah, there are some that they brought into captivity and
- 11:44Speaker 2: they lived for decades and decades. But they have also
- 11:47Speaker 2: documented some in the wild that we're living like well
- 11:49Speaker 2: past fifty years old. Yeah, so it really depends on
- 11:52Speaker 2: what kind of dangers they encounter. But we're not sure
- 11:55Speaker 2: how long they could possibly live, but right now, the
- 11:58Speaker 2: best evidence we have gests almost seventy years. Yeah, as
- 12:02Speaker 2: you mentioned, these gentle giants, they have no natural predators
- 12:05Speaker 2: and no prey because they're herbivores and they're so large,
- 12:09Speaker 2: even alligators and crocodiles leave them alone. They also like
- 12:13Speaker 2: generally steer clear of them, but they don't seem to
- 12:15Speaker 2: that interested in them, and probably because they're so large,
- 12:20Speaker 2: Like it's just not like they're good. The crocodile is
- 12:23Speaker 2: usually gonna go for something smaller that they can just
- 12:25Speaker 2: take down in a single view.
- 12:26Speaker 3: It's just easier for them.
- 12:27Speaker 1: Yeah, it's not smart prey, yeah exactly.
- 12:29Speaker 2: But yeah, they live these peaceful lives eating grass and
- 12:32Speaker 2: cruising slowly along rivers and coasts and sometimes even along
- 12:36Speaker 2: open ocean apparently, And so you might think that they
- 12:40Speaker 2: do just find but the largest threat facing them, which
- 12:44Speaker 2: is responsible for twenty five percent of all manatee deaths,
- 12:49Speaker 2: is humans. Unfortunately.
- 12:51Speaker 1: Yeah.
- 12:52Speaker 4: Yeah, the largest threat to manatees is boats. There are
- 12:55Speaker 4: nearly a million regular boaters in the regions of Florida
- 12:57Speaker 4: where manatees live, and they kill a really alarming amount
- 13:01Speaker 4: of manatees a lot of times because they're traveling. It's
- 13:03Speaker 4: not even because they strike them through casual boating. It's
- 13:07Speaker 4: because they're just traveling too fast in areas where manatees populate.
- 13:11Speaker 1: That's usually what it is.
- 13:12Speaker 4: Is they're just not paying attention and they are just
- 13:15Speaker 4: blazing through areas that they shouldn't be, like moving so faster.
- 13:18Speaker 4: It's like basically boats are traveling above the speed limit
- 13:21Speaker 4: and it's killing manatees.
- 13:23Speaker 3: Yeah.
- 13:24Speaker 2: So, manatees can only hold their breasts for about up
- 13:26Speaker 2: to twenty minutes underwater, so they usually stay pretty close
- 13:29Speaker 2: to the surface they need to to breathe, they don't
- 13:32Speaker 2: need to go particularly deep, and they do spend pretty
- 13:35Speaker 2: much all of their time in the water, but it's
- 13:36Speaker 2: pretty close to the surface, so that's where the bottom
- 13:39Speaker 2: of boats are, and then people are being careless, they
- 13:42Speaker 2: tend to just run into them and do other things.
- 13:45Speaker 2: The other way that humans threatened manatees is by destroying
- 13:48Speaker 2: their habitats and polluting their water. Yeah, wetlands where there
- 13:52Speaker 2: was like a lot of enough water for manatees to
- 13:56Speaker 2: sort of swim in and navigate, those have been built over.
- 14:00Speaker 2: They've just been you know, people brought in land and
- 14:03Speaker 2: developed there or drained it and whatnot. They've polluted the
- 14:06Speaker 2: water with chemicals and runoff. I mean, it's really just
- 14:10Speaker 2: due to policies that allow such things that the set
- 14:12Speaker 2: can even happen.
- 14:13Speaker 1: Yeah.
- 14:13Speaker 4: I bet if you're listening to this, you could probably
- 14:15Speaker 4: guess what type of policies allow for that sort of thing. Yeah,
- 14:19Speaker 4: so surprise, Manite conservation and environmental conservation is absolutely a
- 14:24Speaker 4: political issue and we should be spending more time doing.
- 14:26Speaker 1: This, thankfully.
- 14:27Speaker 4: You know, growing up in Florida, there was always a
- 14:30Speaker 4: big push for conservation here. Cool that is like one
- 14:33Speaker 4: of the strange things about Florida is that environmental conservation
- 14:36Speaker 4: has been such a critical part of all of our
- 14:38Speaker 4: education growing up. Maybe that's like a nineties thing, but
- 14:41Speaker 4: it was also just a Florida thing, and one of
- 14:43Speaker 4: the things that we always focused on was manit habitats.
- 14:45Speaker 4: So I think lots of Floridians, if you're from here,
- 14:48Speaker 4: this is probably very familiar territory for you. For those
- 14:51Speaker 4: of you who don't know, they were endangered for a
- 14:53Speaker 4: long time and they have a lot of the conservation
- 14:55Speaker 4: efforts have done a really great job of bringing back
- 14:57Speaker 4: the populations cool, so it can be effective. It just
- 15:00Speaker 4: takes decades, but it has worked awesome.
- 15:03Speaker 2: It's great that that is something that manages to succeed
- 15:06Speaker 2: somewhat in Florida, given that that's a place that tends.
- 15:08Speaker 3: To not such.
- 15:13Speaker 2: To not embrace such policies and to allow a lot
- 15:15Speaker 2: of destruction to happen of the natural beauty of Florida.
- 15:20Speaker 2: As you had mentioned at the top of this, there
- 15:24Speaker 2: is some speculation. It's not super clear, but there's speculation
- 15:27Speaker 2: that when sailors came across to the United States and
- 15:31Speaker 2: they saw a manatees for the first time, they believed
- 15:33Speaker 2: that they were mermaids. Yes, and so it's not one
- 15:36Speaker 2: hundred percent confirmed that that's the case. Because there is
- 15:39Speaker 2: not a really great way to document these things, but
- 15:42Speaker 2: there is some evidence to suggest that's possibly what happened
- 15:45Speaker 2: is that they were desperate and dehydrated and probably low
- 15:49Speaker 2: on food and exhausted and hadn't seen a woman in
- 15:52Speaker 2: so long and then they see this vaguely humanoid shaped
- 15:57Speaker 2: thing in the water and with.
- 15:59Speaker 1: Like a paddle, get something with eyes and the lips.
- 16:01Speaker 2: Yeah, it's a lady as Actually, it turns out that
- 16:06Speaker 2: the name manatee is derived from the same word that
- 16:09Speaker 2: means like sirens, like the sirens from Greek mythology. So
- 16:14Speaker 2: that's just a fun mini tidbit about manates yep.
- 16:18Speaker 4: And then one more tidbit too is that, like speaking
- 16:20Speaker 4: of how big they are, their tails are so strong
- 16:23Speaker 4: that if they if they had the balance, they could
- 16:26Speaker 4: stand upright and hold their body weight on land because
- 16:30Speaker 4: their tails and like their back muscles are so strong
- 16:32Speaker 4: that they.
- 16:33Speaker 3: Can do that.
- 16:33Speaker 4: So that's also kind of an interesting thing I thought
- 16:36Speaker 4: was a lot of fun to share.
- 16:37Speaker 2: Wow, all right, well we are way past time for
- 16:39Speaker 2: a minute, so we should wrap it up there. If
- 16:41Speaker 2: you like to support us, you can join us on
- 16:43Speaker 2: Patreon that helps us do this podcast. On our full
- 16:47Speaker 2: length episodes, we say thank you to the people who
- 16:49Speaker 2: have helped us on joined us on Patreon, and if not,
- 16:53Speaker 2: then you can do other things to support us by
- 16:55Speaker 2: leaving us a nice five star review rating and you
- 16:58Speaker 2: can also add a review and that helped to go
- 17:00Speaker 2: tell a friend like subscribe so you don't miss any episodes.
- 17:03Speaker 2: And then if you like to tell us your thoughts
- 17:05Speaker 2: on manates, you can email us directly and for at
- 17:07Speaker 2: wwdwwdpodcast dot com. But I think that's all we have
- 17:11Speaker 2: to say about manatees for now. Is there anything you
- 17:13Speaker 2: like to add before we say goodbyes?
- 17:15Speaker 1: Nothing else death covers it.
- 17:17Speaker 3: Thank you all for listening. Thank you to my team
- 17:18Speaker 3: of people.
- 17:19Speaker 1: This is Abraham and this is Shane.
- 17:21Speaker 3: Why we do what we do? Mini is out.
- 17:22Speaker 1: Bye. You've been listening to Why We Do what We Do.
- 17:26Speaker 4: You can learn more about this and other episodes by
- 17:29Speaker 4: going to wwdwwdpodcast dot com. Thanks for listening and we
- 17:35Speaker 4: hope you have an awesome day