In a 13-year study of population dynamics of the invasive Asian shore crab (Hemigrapsus sanguineus) in Long Island Sound, Kraemer (2019) found that density declined over time, and the largest size classes declined the most. At the same time, average size of breeding females also declined (see figures below). Based on your understanding of life-history strategies, develop a hypothesis that would explain this pattern. Explain the reasoning behind it in enough detail that another student would be able to understand it.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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  1. In a 13-year study of population dynamics of the invasive Asian shore crab (Hemigrapsus sanguineus) in Long Island Sound, Kraemer (2019) found that density declined over time, and the largest size classes declined the most. At the same time, average size of breeding females also declined (see figures below). Based on your understanding of life-history strategies, develop a hypothesis that would explain this pattern. Explain the reasoning behind it in enough detail that another student would be able to understand it.

 

 

 

100
75
8.
88
12-13 mm CW
251 13-14 mm CW
50
20
15
10
O Mde
A Female
0%
30- 8
2005-2008 2009-2012 2013-2017
2005-2008 2009-2012 2013-2017
A 152
n= 157
n213
n 144
n 164
A 242
20
Period during invasion
10-
2004 2006 2008 2010 2012 2014 2016 2018
Year
snoebno e jeu
% females in size class
w ou) Aasuea
Transcribed Image Text:100 75 8. 88 12-13 mm CW 251 13-14 mm CW 50 20 15 10 O Mde A Female 0% 30- 8 2005-2008 2009-2012 2013-2017 2005-2008 2009-2012 2013-2017 A 152 n= 157 n213 n 144 n 164 A 242 20 Period during invasion 10- 2004 2006 2008 2010 2012 2014 2016 2018 Year snoebno e jeu % females in size class w ou) Aasuea
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