Cheliped differentiation and sex ratio of the fiddler crab Uca arcuata

スポンサーリンク

概要

• 論文の詳細を見る

• We analyzed a total of 3,784 young fiddler crabs of Uca arcuata (De Haan, 1833) with carapace widths (CW) between 1.45 and 9.95mm, collected from a site on the Ohno River in Central Kyushu, Japan. All crabs with CW<3.0mm possessed two small symmetrical chelipeds. Young male crabs with a CW between 3.0 and 6.0mm exhibited one of four stages of cheliped differentiation: 1) two small chelipeds; 2) two large chelipeds; 3) only one cheliped; and 4) asymmetrical chelipeds (one large and one small). We identified 646 male and 632 female crabs with a CW between 6.0 and 9.95mm. No statistical difference from the 1:1 ratio is evident. We conclude that the basic sex ratio for U. arcuata is unity.

著者

• Henmi Yasuhisa

  Aitsu Marine Station Center For Marine Environmental Studies Kumamoto University

• Henmi Yasuhisa

  Aitsu Marine Biological Station Kumamoto University

関連論文

• Surface structures of Pugettia quadridens and P. intermedia (Majidae, Decapoda)
• Cheliped differentiation and sex ratio of the fiddler crab Uca arcuata
• Reproduction and embryonic diapause in the hermit crab Pagurus nigrofascia
• Life History of the Luminescent Crustacean Vargula hilgendorfii and the Occurrence of its Crustacean Ectoparasite Onisocryptus ovalis
• Biology of the Amphioxus, Branchiostoma belcheri in the Ariake Sea, Japan II. Reproduction
• Biology of the Amphioxus, Branchiostoma belcheri in the Ariake Sea, Japan I. Population Structure and Growth
• Comparisons of life history traits among populations of the ocypodid crab Macrophthalmus japonicus in habitats with contrasting food availability

スポンサーリンク