#122 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 00:02
赵老师说了，到明年春天，交配的季节
分页： 7 / 7
#123 Re: 在院子里捡到一窝鸭蛋
发表于 ： 2025年 5月 26日 01:17
If at First You Don't Succeed
For breeding hens, producing a brood of ducklings requires perseverance as well as good nesting habitat
By Brian L. Joynt, IWWR Biologist
Now what? After a hen has endured all sorts of advances from amorous drakes before finally selecting a mate, migrated hundreds of miles to the breeding grounds, helped her drake defend their chosen territory, explored countless spots before selecting a nest site, exposed herself to a dozen or more predators while laying or incubating, she now returns to her nest to find all her eggs have been eaten! What's a hen to do?
For many ducks, it's "if at first you don't succeed, try, try again." Many hens will "renest," that is, build another nest and lay another set of eggs to compensate for high rates of nest predation common on the breeding grounds. The new nest might be relatively close to the location of the hen's previous nest or a couple miles away in a completely different habitat.
If and when a hen renests are thought to be influenced by several factors. For example, the stage of progression of the nest at the time of its destruction is important. Ducks are "indeterminate layers." They will continue to lay eggs until their clutch is complete (as opposed to "determinate layers," which tend to lay a specific-sized clutch of eggs).
On any given day during laying, a hen's reproductive system holds six to seven partially developed eggs. One egg is typically laid each day until the clutch is complete, and then the partially developed eggs still inside the hen's reproductive system are reabsorbed.
If the nest is lost to a predator during the laying phase, the hen can immediately renest because she is still capable of readily producing additional eggs.
If a hen is in the incubation stage when her nest is lost, however, her "renest interval" is longer because she needs additional time to restart egg production. Nesting hens incubate about 20 to 22 hours each day.
While incubating, the hen must utilize her body reserves to maintain herself, and, doing so, she may lose from 25 to 35 percent of her body weight. If a hen loses her nest late in incubation, she will require a long renest interval because she has to rebuild her nutrient reserves before she can produce eggs again. Late in the season, she may not even have enough time to rebuild the necessary reserves.
Renesting behavior is different for each duck and goose species. For example, mallards and northern pintails are more likely to renest than are lesser scaup and gadwall, because mallards and pintails are early nesters. If their first nest fails, they usually still have time left to renest and have the brood gain flight before the end of the breeding and brood-rearing season.
https://www.ducks.org/conservation/wate ... ont-succed
For breeding hens, producing a brood of ducklings requires perseverance as well as good nesting habitat
By Brian L. Joynt, IWWR Biologist
Now what? After a hen has endured all sorts of advances from amorous drakes before finally selecting a mate, migrated hundreds of miles to the breeding grounds, helped her drake defend their chosen territory, explored countless spots before selecting a nest site, exposed herself to a dozen or more predators while laying or incubating, she now returns to her nest to find all her eggs have been eaten! What's a hen to do?
For many ducks, it's "if at first you don't succeed, try, try again." Many hens will "renest," that is, build another nest and lay another set of eggs to compensate for high rates of nest predation common on the breeding grounds. The new nest might be relatively close to the location of the hen's previous nest or a couple miles away in a completely different habitat.
If and when a hen renests are thought to be influenced by several factors. For example, the stage of progression of the nest at the time of its destruction is important. Ducks are "indeterminate layers." They will continue to lay eggs until their clutch is complete (as opposed to "determinate layers," which tend to lay a specific-sized clutch of eggs).
On any given day during laying, a hen's reproductive system holds six to seven partially developed eggs. One egg is typically laid each day until the clutch is complete, and then the partially developed eggs still inside the hen's reproductive system are reabsorbed.
If the nest is lost to a predator during the laying phase, the hen can immediately renest because she is still capable of readily producing additional eggs.
If a hen is in the incubation stage when her nest is lost, however, her "renest interval" is longer because she needs additional time to restart egg production. Nesting hens incubate about 20 to 22 hours each day.
While incubating, the hen must utilize her body reserves to maintain herself, and, doing so, she may lose from 25 to 35 percent of her body weight. If a hen loses her nest late in incubation, she will require a long renest interval because she has to rebuild her nutrient reserves before she can produce eggs again. Late in the season, she may not even have enough time to rebuild the necessary reserves.
Renesting behavior is different for each duck and goose species. For example, mallards and northern pintails are more likely to renest than are lesser scaup and gadwall, because mallards and pintails are early nesters. If their first nest fails, they usually still have time left to renest and have the brood gain flight before the end of the breeding and brood-rearing season.
https://www.ducks.org/conservation/wate ... ont-succed
#124 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 02:17
我今天还和小朋友讨论了一下：鸡鸭是不是不交配也会生蛋？每年春季就生？如果交配，是只交配一次，这个季节产的都是可以孵化的蛋，还是只有交配当天或第二天产的蛋是可以孵化的？鸡鸭在产卵季节每天交配吗……
#125 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 02:41
According to Google AI:wh 写了： 2025年 5月 26日 02:17 我今天还和小朋友讨论了一下：鸡鸭是不是不交配也会生蛋？每年春季就生？如果交配，是只交配一次，这个季节产的都是可以孵化的蛋，还是只有交配当天或第二天产的蛋是可以孵化的？鸡鸭在产卵季节每天交配吗……
No, a single copulation typically won't fertilize all the eggs a duck lays during a season. Ducks lay eggs one at a time, and each egg is fertilized as it travels through the female's reproductive tract. The sperm can remain viable for a few days, allowing for fertilization of multiple eggs after a single mating. However, the duck typically lays multiple eggs over a period of time, and a single mating won't guarantee fertilization of all of them. [1, 1, 2, 2, 3, 4, 5, 6]
AI responses may include mistakes.
[1] https://www.ducks.org/conservation/wate ... mazing-egg
[2] https://www.parkertexas.us/405/Ducks
[3] https://www.sciencedirect.com/science/a ... 5-main.pdf
[4] https://scholarworks.uni.edu/cgi/viewco ... ntext=pias
[5] https://www.omlet.us/guide/ducks/eggs/drake/
[6] https://www.completefertility.co.uk/abo ... ity-basics
#126 Re: 在院子里捡到一窝鸭蛋
发表于 ： 2025年 5月 26日 02:48
哈哈，鸭妈妈很友好，不过那只不像亲生的黄毛鸭很敌视小野鸡
野鸡爪子真发达，跑起来真快。让我想起以前在西藏山里看见黑色野猪，跑得飞快，我都不相信是猪…… 这位主人是哪里人？说话有苏北口音。野鸡躺在他的手掌里就睡觉，真有趣。不知道@datoumao养鸡的时候，有没有小鸡躺在大头猫手里睡觉 好像大头猫的手掌比这人的更厚实…… #127 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 02:55
明白了，所以交配一次，以后几天内生的蛋应该可以孵化，但时间长了精子就失效了……YWY 写了： 2025年 5月 26日 02:41 According to Google AI:
No, a single copulation typically won't fertilize all the eggs a duck lays during a season. Ducks lay eggs one at a time, and each egg is fertilized as it travels through the female's reproductive tract. The sperm can remain viable for a few days, allowing for fertilization of multiple eggs after a single mating. However, the duck typically lays multiple eggs over a period of time, and a single mating won't guarantee fertilization of all of them. [1, 1, 2, 2, 3, 4, 5, 6]
AI responses may include mistakes.
[1] https://www.ducks.org/conservation/wate ... mazing-egg
[2] https://www.parkertexas.us/405/Ducks
[3] https://www.sciencedirect.com/science/a ... 5-main.pdf
[4] https://scholarworks.uni.edu/cgi/viewco ... ntext=pias
[5] https://www.omlet.us/guide/ducks/eggs/drake/
[6] https://www.completefertility.co.uk/abo ... ity-basics
我以为鸡鸭大概不会每天交配，查了一下吓一跳：
Roosters can mate 10 to 30 or more times per day, depending on the availability of hens and competition from other roosters. Mating frequency also has a diurnal pattern, with peaks occurring early and late in the day.
要是每天都交配，每天10-30次，那一个春天得交配多少次啊……
#128 Re: 在院子里捡到一窝鸭蛋
发表于 ： 2025年 5月 26日 02:57
单手凌空画圈是个古老的spell？mnls 写了： 2025年 5月 25日 15:11 这视频挺好玩的，谢谢分享。
我老家生活环境跟这个还挺像的，有时候想着，能回去住个半年一年的，应该挺好玩的。小时候家家都养鸡，我们小朋友喜欢抓住鸡，玩一个游戏。就是把鸡头别到鸡翅膀下面，一只手按住它放在地上，另一只手在它上面凌空花几个圈。然后松开手，鸡就会定在那里，如果没人把它放开，要过好半天鸡才回自己挣扎起来跑路。不知道是什么原理？
#129 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 09:28
索男们望尘莫及、望洋兴叹、望其项背、望梅止渴。wh 写了： 2025年 5月 26日 02:55 明白了，所以交配一次，以后几天内生的蛋应该可以孵化，但时间长了精子就失效了……
我以为鸡鸭大概不会每天交配，查了一下吓一跳：
Roosters can mate 10 to 30 or more times per day, depending on the availability of hens and competition from other roosters. Mating frequency also has a diurnal pattern, with peaks occurring early and late in the day.
要是每天都交配，每天10-30次，那一个春天得交配多少次啊……
#130 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 13:41
各有长短……
#131 Re: 在院子里捡到一窝鸭蛋
发表于 ： 2025年 5月 26日 22:07
后来发现画圈只是个障眼法，实际上把鸡头埋在翅膀下面一小会，就行了，画不画圈其实无所谓。只是小时候觉得那个是画龙点睛之笔。
#132 Re: 在院子里捡到一窝鸭蛋 - 无言的结局
发表于 ： 2025年 5月 26日 22:10
也不用羡慕啊。一窝小鸡仔长大，公母的数目总体应该是一比一。过几个月公鸡就会陆陆续续被杀掉，最后只留一两只。母鸡大概率不会被杀掉，要留着下蛋。