Comments for SKJAM! Reviews http://www.skjam.com Book and pop culture reviews by the man known as SKJAM! Fri, 01 Sep 2017 22:33:27 +0000 hourly 1 https://wordpress.org/?v=4.8.1 Comment on Manga Review: One Piece #27 & #28 by Monthly Manga Review Index: August 2017 http://www.skjam.com/2017/08/26/manga-review-one-piece-27-28/#comment-29423 Fri, 01 Sep 2017 22:33:27 +0000 http://www.skjam.com/?p=2965#comment-29423 […] One Piece, Vols. 27-28 (SKJAM, SKJAM! Reviews) […]

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Comment on Manga Review: Haikyu!! 1 by Monthly Manga Review Index: August 2017 http://www.skjam.com/2017/08/05/manga-review-haikyu-1/#comment-29422 Fri, 01 Sep 2017 22:31:48 +0000 http://www.skjam.com/?p=2943#comment-29422 […] Haikyu!!, Vol. 1 (SKJAM, SKJAM! Reviews) […]

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Comment on Manga Review: Dawn of the Arcana 1 by Monthly Manga Review Index: July 2017 http://www.skjam.com/2017/07/16/manga-review-dawn-of-the-arcana-1/#comment-29421 Tue, 01 Aug 2017 22:26:16 +0000 http://www.skjam.com/?p=2915#comment-29421 […] Dawn of the Arcana, Vol. 1 (SKJAM, SKAJM! Reviews) […]

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Comment on Manga Review: Mobile Suit Gundam Thunderbolt 1 by Monthly Manga Review Index: June 2017 http://www.skjam.com/2017/06/18/manga-review-mobile-suit-gundam-thunderbolt-1/#comment-29416 Fri, 07 Jul 2017 00:14:13 +0000 http://www.skjam.com/?p=2876#comment-29416 […] Mobile Suit Gundam Thunderbolt, Vol. 1 (SKJAM, SKJAM! Reviews) […]

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Comment on Manga Review: Vagabond Volume 2 by Monthly Manga Review Index: May 2017 http://www.skjam.com/2017/05/24/manga-review-vagabond-volume-2/#comment-29405 Sat, 10 Jun 2017 21:24:12 +0000 http://www.skjam.com/?p=2843#comment-29405 […] Vagabond, Vol. 2 (SKJAM, SKJAM! Reviews) […]

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Comment on Manga Review: Platinum End Volume 2 by Monthly Manga Review Index: May 2017 http://www.skjam.com/2017/05/17/manga-review-platinum-end-volume-2/#comment-29404 Thu, 01 Jun 2017 21:59:01 +0000 http://www.skjam.com/?p=2830#comment-29404 […] Platinum End, Vol. 2 (SKJAM, SKJAM! Reviews) […]

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Comment on Book Review: A Game of Thrones by Book Review: A Clash of Kings – SKJAM! Reviews http://www.skjam.com/2017/04/09/book-review-a-game-of-thrones/#comment-29403 Sat, 06 May 2017 02:20:44 +0000 http://www.skjam.com/?p=2758#comment-29403 […] Note:  This review contains spoilers for the previous book A Game of Thrones; if you haven’t read that one yet, check out the review here. […]

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Comment on Anime Review: Erased by admin http://www.skjam.com/2017/04/29/anime-review-erased/#comment-29402 Sat, 29 Apr 2017 22:50:28 +0000 http://www.skjam.com/?p=2791#comment-29402 Thanks!

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Comment on Anime Review: Erased by Stephanie http://www.skjam.com/2017/04/29/anime-review-erased/#comment-29401 Sat, 29 Apr 2017 20:37:19 +0000 http://www.skjam.com/?p=2791#comment-29401 Great review!

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Comment on Book Review: Inferior by MatthiasThalmann http://www.skjam.com/2017/03/04/book-review-inferior/#comment-29400 Sun, 12 Mar 2017 06:42:44 +0000 http://www.skjam.com/?p=2699#comment-29400 Okay, that is not what I learned about the two hypothesis. (Altough I have to note that I’m a plant biologist, so I may have misunderstood the behavorial biology courses at the university).

As far as I recall my professor explained the two theories like that:

1. Observation: Women continue to live after menopause.
2. Question: Why does that happen? After all non-reproducing members of a species still consume resources thus lowering the reproduction rate of the whole species which is a disadvantage in evolution.
3. Grandmother Hypothesis: Older women help their children raise grandchildren improving their survival chances and thus the reproduction rate of the whole species which is an advanatage.
4. Observation: In men spermatogenesis continues until death (the oldest known father was 94 when he sired the child).
5. Why does that happen? Why don’t older men also become infertile and help raising grand-children? Particularly, since once grandma is past her menopause grandpa cannot reproduce anyway regardless of whether he is still fertile, making continued spermatogenesis a waste of energy.
6. Patriarch Hypothesis: Older men used to mate with younger women after their first wife had her menopause, so their continued spermatogenesis was an advantage.

I would also like to point out that the partriarch hypothesis as presented in this book makes no sense, as it does not explain why women continue to live after menopause. If indeed Menopause would have evolved because men didn’t want to mate with older women then this older women would still consume resources for no benefit of the species. So unless these women do contribute to the fitness of the species as a whole (e.g. as per the grandmother hypothesis) menopause would still be maladaptive.

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