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1 November 2010 Interpopulation Variations in Life History Traits in the Fiddler Crab Uca arcuata
Misuzu Aoki, Yoko Watanabe, Hideyuki Imai, Mahito Kamada, Keiji Wada
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Abstract

We compared seasonal changes in population structures and surface activities in the fiddler crab Uca arcuata between temperate (Yoshinogawa, Japan) and subtropical localities (Shinko, Japan). At Yoshinogawa, male courtship behavior was observed from April to July and pair formation from May to July, whereas at Shinko such mating behavior patterns were observed over two periods (June to September and February to March). Thus, the subtropical population appears to have a longer breeding period than the temperate population. Waving occurred from June to August at Yoshinogawa and during all months (except October and November) at Shinko. Waving frequency was higher during courting periods at all localities, although lower at Shinko compared with Yoshinogawa. Maximum body size and the size at maturity were smaller at Shinko than at Yoshinogawa. Surface and underground couplings were observed at Yoshinogawa, whereas only surface coupling was observed at Shinko. These differences and similarities are discussed from the viewpoint of habitat conditions and population characteristics.

Misuzu Aoki, Yoko Watanabe, Hideyuki Imai, Mahito Kamada, and Keiji Wada "Interpopulation Variations in Life History Traits in the Fiddler Crab Uca arcuata," Journal of Crustacean Biology 30(4), 607-614, (1 November 2010). https://doi.org/10.1651/09-3222.1
Received: 26 September 2009; Accepted: 1 February 2010; Published: 1 November 2010
JOURNAL ARTICLE
8 PAGES

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KEYWORDS
breeding period
fiddler crabs
life history traits
mating behavior
population structure
Uca arcuata
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