I***i
发帖数: 14557 | |
I***i
发帖数: 14557 | 2 英文名Damselfly
请看下面这篇有关蜻蜓、豆娘的科普文章
http://insects.about.com/od/dragonfliesanddamselflies/p/How-Dra
How Dragonflies Mate
By Debbie Hadley
Dragonfly sex is a rough and tumble affair. If you've ever seen a pair of
mating dragonflies in the throes of passion, you know that their sexual
coupling requires the flexibility and acrobatic skill of a Cirque de Soleil
performer. Females get bitten, males get scratched, and sperm winds up
everywhere. These strange mating habits have survived millions of years of
evolution, so the dragonflies must know what they're doing, right? Let's
take a closer look at how dragonflies mate.
Dragonfly Courtship:
As you might imagine, dragonflies don't engage in elaborate courtship
rituals. In a few families, the male dragonfly may display his colors, or
fly over his territory to show a potential mate what a good oviposition site
he's chosen for their offspring, but that's about it. Dragonfly foreplay
leaves much to be desired.
Because dragonflies have extraordinarily good vision, the males rely mostly
on their eyesight to find appropriate female partners. Since a typical pond
or lake habitat will support many species of dragonflies and damselflies, he
must be able to distinguish females of his own species from all the other
Odonates flying around. A male can recognize a conspecific female by
observing her flight style, her colors and patterns, and her size.
Dragonfly Mating:
As with many insects, male dragonflies make the first move to initiate sex.
When a male spots a female of his own species, he must first subdue her. He'
ll approach her from behind, usually while they are both in flight, and hold
onto her thorax with his legs. If he's feeling feisty, he might bite her,
too. If he hopes to mate successfully, he must get a firmer grip on her
quickly. The male dragonfly will pull his abdomen forward and use his anal
appendages, a pair of cerci, to clasp her by the neck (her prothorax). Once
he has her tightly by the neck, he can extend his body and continue to fly
with her, in tandem. This position is known as tandem linkage.
Now that he's got a hold of a mate, the male dragonfly needs to prepare for
sex. Dragonflies have secondary sex organs, meaning they don't store sperm
near the copulatory organ. He must transfer some sperm from a gonopore on
his ninth abdominal segment to his penis, which is located under his second
abdominal segment. Once he's charged his seminal vesicle with sperm, he's
ready to go.
Now for the acrobatics. The female's genital opening is near the tip of her
abdomen, while the male's penis is closer to his thorax (on the underside of
his second abdominal segment). The female must bend her abdomen forward,
sometimes with coaxing from the male, to bring her genitalia into contact
with his penis. This position during copulation, known as a wheel formation
because the couple forms a closed circle with their joined bodies, is unique
to the order Odonata. In dragonflies, the sex organs lock together briefly
(not so for damselflies). Some dragonflies will mate in flight, while others
will retire to a nearby perch to consummate their relationship.
Competition Among Male Dragonflies:
Female dragonflies operate by the "last in, first out" rule of fertilization
. If given the opportunity, she might mate with multiple partners, but the
sperm from her final sexual partner will fertilize her eggs, in most cases.
Male dragonflies, therefore, have an incentive to make sure their sperm is
the last to be deposited in her.
A male dragonfly can increase his chances of fatherhood by destroying the
sperm of his competitors, and he's well equipped to do so when he mates.
Some dragonflies have backwards-facing hooks or barbs on their penises,
which they can use to scoop out any sperm they find inside their partner
before depositing their own. Other dragonflies use their penises to tamp
down or move the offending sperm, pushing it aside before he places his own
in the ideal location for fertilization. Still other dragonfly males will
dilute any existing sperm they find. In all cases, his goal is to ensure
that his sperm supersedes that of any prior partners she has had.
Just to provide an added measure of security for his sperm, the male
dragonfly will often guard the female until she oviposits her eggs. He tries
to prevent her from mating with any other males, so his sperm is assured
the "last in" position that will make him a father. Male damselflies will
often continue to grasp their partners with their cerci, refusing to let go
until she oviposits. He'll even endure a dunking in the pond if she
submerges to place her eggs. Many dragonflies prefer to guard their partners
by simply chasing off any approaching males, even engaging in wing-to-wing
combat if necessary. |
h*h
发帖数: 18873 | |
h*****t
发帖数: 6890 | 4 我看了半天没看懂它们在搞什么，一个把尾巴贴到另一个的背上？ |
I***i
发帖数: 14557 | 5 下面的豆娘的肚子要挑上去才算成功
【在 h*h 的大作中提到】
: 高难度特技动作。
|
I***i
发帖数: 14557 | 6 在搞那啥。。。
【在 h*****t 的大作中提到】
: 我看了半天没看懂它们在搞什么，一个把尾巴贴到另一个的背上？
|
I***i
发帖数: 14557 | 7 科普文章在二楼：How Dragonflies Mate |
e****o
发帖数: 3844 | |
d*******y
发帖数: 7 | |
I***i
发帖数: 14557 | 10 豆娘的LG就自然叫豆叔了
【在 e****o 的大作中提到】
: 为啥叫豆娘豆叔?
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I***i
发帖数: 14557 | 11 说曹操……
【在 d*******y 的大作中提到】
: 打喷嚏了，上来看看~~~~
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F******s
发帖数: 312 | 12 华丽丽的紫边啊～～～～～～～～～～～～
烧器材吧～～～～～～～～～～
嘻嘻～ |
e****o
发帖数: 3844 | 13 哈哈哈哈哈，我可是忍了一下午都没说啊~~~
【在 F******s 的大作中提到】
: 华丽丽的紫边啊～～～～～～～～～～～～
: 烧器材吧～～～～～～～～～～
: 嘻嘻～
|
e****o
发帖数: 3844 | 14 为啥蜻蜓叫豆娘？
【在 I***i 的大作中提到】
: 豆娘的LG就自然叫豆叔了
|
I***i
发帖数: 14557 | 15 眼神不要这么犀利好不好~~~~~~~~~~~~~~~~~~~~~~~~~~~~
不是不想烧，而是没钱烧~~~~~~~~~~~~~~~~~~~~~~~~~~
唉唉~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
【在 e****o 的大作中提到】
: 哈哈哈哈哈，我可是忍了一下午都没说啊~~~
|
I***i
发帖数: 14557 | 16 这种东东中文就叫豆娘，和蜻蜓有区别的
以前讨论过，好像区别之一是豆娘停下来时翅膀时并起来的
【在 e****o 的大作中提到】
: 为啥蜻蜓叫豆娘？
|
I***i
发帖数: 14557 | |
e****o
发帖数: 3844 | 18 你没看我都克制一下午没提这紫边儿了嘛，今天可是蝶神想踹你入坑的哟~
减少大逆光以及背景过凉的场景，紫边儿就少得多，比如你头两张
【在 I***i 的大作中提到】
: 眼神不要这么犀利好不好~~~~~~~~~~~~~~~~~~~~~~~~~~~~
: 不是不想烧，而是没钱烧~~~~~~~~~~~~~~~~~~~~~~~~~~
: 唉唉~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
I***i
发帖数: 14557 | 19 尽管提，别憋着，这样我也知道什么是好照片什么是不好的照片
【在 e****o 的大作中提到】
: 你没看我都克制一下午没提这紫边儿了嘛，今天可是蝶神想踹你入坑的哟~
: 减少大逆光以及背景过凉的场景，紫边儿就少得多，比如你头两张
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F******s
发帖数: 312 | 20 蜻蜓样子的昆虫粗分可以分成蜻蜓和蟌（就是豆娘）
再细分，蜻蜓可以分为蜻和蜓，要看它们前后翅上边的三角室的朝向是否一致
蟌可以分为蟌和色蟌
的确比较乱
【在 I***i 的大作中提到】
: 这种东东中文就叫豆娘，和蜻蜓有区别的
: 以前讨论过，好像区别之一是豆娘停下来时翅膀时并起来的
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F******s
发帖数: 312 | 21 大美女，你放过我吧～～～
蝶神这两个字会压死人的！
【在 e****o 的大作中提到】
: 你没看我都克制一下午没提这紫边儿了嘛，今天可是蝶神想踹你入坑的哟~
: 减少大逆光以及背景过凉的场景，紫边儿就少得多，比如你头两张
|
F******s
发帖数: 312 | 22 我作丑人了～～～
【在 e****o 的大作中提到】
: 哈哈哈哈哈，我可是忍了一下午都没说啊~~~
|
F******s
发帖数: 312 | 23 摄影就是用光的艺术嘛～
关键就是把钱用光～～～
（我在坑边得意地笑啊得意地笑～～～～）
【在 I***i 的大作中提到】
: 眼神不要这么犀利好不好~~~~~~~~~~~~~~~~~~~~~~~~~~~~
: 不是不想烧，而是没钱烧~~~~~~~~~~~~~~~~~~~~~~~~~~
: 唉唉~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
I***i
发帖数: 14557 | 24 学习了
看来这里面的学问还很多
【在 F******s 的大作中提到】
: 蜻蜓样子的昆虫粗分可以分成蜻蜓和蟌（就是豆娘）
: 再细分，蜻蜓可以分为蜻和蜓，要看它们前后翅上边的三角室的朝向是否一致
: 蟌可以分为蟌和色蟌
: 的确比较乱
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l*t
发帖数: 10829 | |
e****o
发帖数: 3844 | 26 哈哈，紫边嘛，其实跟机身镜头关系是相当的大……既然你没法升级，那最好的办法就
是尽量避免大光比的场景，有时候往往你的机位稍微移动一点点，紫边就会好很多
【在 I***i 的大作中提到】
: 尽管提，别憋着，这样我也知道什么是好照片什么是不好的照片
|
e****o
发帖数: 3844 | 27 哎，这个版上你是对蝴蝶蜻蜓等昆虫类知道的最多的了，基本上是个蝴蝶蛾子，给个图
片加上点点信息就知道是啥，就算不当蝶神也是蝶痴啊~
【在 F******s 的大作中提到】
: 蜻蜓样子的昆虫粗分可以分成蜻蜓和蟌（就是豆娘）
: 再细分，蜻蜓可以分为蜻和蜓，要看它们前后翅上边的三角室的朝向是否一致
: 蟌可以分为蟌和色蟌
: 的确比较乱
|
h*****t
发帖数: 6890 | 28 赞心态好。
【在 I***i 的大作中提到】
: 尽管提，别憋着，这样我也知道什么是好照片什么是不好的照片
|
h*h
发帖数: 18873 | 29 改你猫贴了标签，ash 这个蝶神没的跑，谦虚也没用，在这你是蝴蝶蜻蜓....昆虫的大
牛。
【在 e****o 的大作中提到】
: 哎，这个版上你是对蝴蝶蜻蜓等昆虫类知道的最多的了，基本上是个蝴蝶蛾子，给个图
: 片加上点点信息就知道是啥，就算不当蝶神也是蝶痴啊~
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F******s
发帖数: 312 | 30 大美女，你这是把我往坑里推啊
蝶神是已逝的周尧教授的称号，他编写了中国第一本蝴蝶分类大全，《中国蝶类志》
蝶痴是我师父，我就是个业余爱好者
ps 搜了搜“蝶痴”，发现好多人叫蝶痴啊，呵呵
【在 e****o 的大作中提到】
: 哎，这个版上你是对蝴蝶蜻蜓等昆虫类知道的最多的了，基本上是个蝴蝶蛾子，给个图
: 片加上点点信息就知道是啥，就算不当蝶神也是蝶痴啊~
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F******s
发帖数: 312 | 31 蜻蜓我不熟，就是偶尔跟这边几个蜻蜓爱好者一起出外过几次，他们比我牛多了
【在 h*h 的大作中提到】
: 改你猫贴了标签，ash 这个蝶神没的跑，谦虚也没用，在这你是蝴蝶蜻蜓....昆虫的大
: 牛。
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F******s
发帖数: 312 | 32 既然都做了丑人了，就多嘴再说一个
拍这种小的昆虫，可以考虑把整个虫子放在焦平面上，这样从头到尾都拍得清楚
个人意见而已
【在 I***i 的大作中提到】
: 尽管提，别憋着，这样我也知道什么是好照片什么是不好的照片
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I***i
发帖数: 14557 | 33 赞用光的艺术
【在 F******s 的大作中提到】
: 摄影就是用光的艺术嘛～
: 关键就是把钱用光～～～
: （我在坑边得意地笑啊得意地笑～～～～）
|
I***i
发帖数: 14557 | 34 很像
【在 l*t 的大作中提到】
: 发散下...这个样子很像战斗机空中加油...
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I***i
发帖数: 14557 | 35 好，记下了
【在 e****o 的大作中提到】
: 哈哈，紫边嘛，其实跟机身镜头关系是相当的大……既然你没法升级，那最好的办法就
: 是尽量避免大光比的场景，有时候往往你的机位稍微移动一点点，紫边就会好很多
|
I***i
发帖数: 14557 | 36 好主意
【在 F******s 的大作中提到】
: 既然都做了丑人了，就多嘴再说一个
: 拍这种小的昆虫，可以考虑把整个虫子放在焦平面上，这样从头到尾都拍得清楚
: 个人意见而已
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T*******m
发帖数: 27308 | |
I***i
发帖数: 14557 | 38 don't try it at home
【在 T*******m 的大作中提到】
: 都是高难动作啊！身体不好的人，请不要试。
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a***a
发帖数: 12425 | |
a***a
发帖数: 12425 | 40 很发散
【在 l*t 的大作中提到】
: 发散下...这个样子很像战斗机空中加油...
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a***a
发帖数: 12425 | 41 你们都是过来人
【在 I***i 的大作中提到】
: don't try it at home
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I***i
发帖数: 14557 | 42 唉，设备不够，技术不行，只能如此了
【在 a***a 的大作中提到】
: 精彩瞬间，就是费眼，哈哈
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