Ontogenetic change of body color patterns in laboratory-raised juveniles of six terrestrial hermit crab species

Hamasaki, Katsuyuki; Tsuru, Takuma; Sanda, Tetsuya; Fujikawa, Shunsuke; Dan, Shigeki; Kitada, Shuichi

doi:10.11646/zootaxa.4226.4.5

Cited by 7 publications

(13 citation statements)

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“…In the present study, therefore, the species of collected crabs with an SL >2 mm were morphologically identified in accordance with Nakasone (), Asakura (), and Hamasaki et al. (). The species of early juveniles with an SL ≤2 mm were identified using PCR‐RFLP techniques (see below).…”

Section: Methodssupporting

confidence: 81%

“…Hamasaki et al. () cultured individuals of six coenobitid species ( B. latro , C. brevimanus , C. cavipes , C. purpureus , C. rugosus , and C. violascens ) from the first crab stage for 9–12 months in the laboratory, where the air temperature was controlled at 27–28°C. These air temperatures were similar to those (~27–29°C) measured during the reproductive season of Coenobita species on Ishigakijima Island (Okinawa Prefectural Board of Education ; Hamasaki et al.…”

Section: Discussionmentioning

confidence: 99%

“…() and Hamasaki et al. (). When the crab could not be removed from the shell to identify the anterior carapace, we inferred SL by measuring the dactylus length of the left third pereiopod ( x ) and calculating the SL value ( y ) using a regression established for each species ( C. rugosus , y =1.180 x ; C. violascens , y =1.005 x ) according to Fujikawa et al.…”

Section: Methodsmentioning

confidence: 97%

“…Hamasaki et al. () examined the body color patterns of the juveniles of six coenobitid species, B. latro , C. brevimanus , C. cavipes , C. purpureus , C. rugosus , and C. violascens , using the laboratory‐raised specimens. The study demonstrated that the distinguishing body color features for species identification became distinct in juveniles with an SL of >1.5 mm.…”

Section: Methodsmentioning

confidence: 99%

“…However, very little is known about the habitats that are used in the early life stages of these crabs because identifying the species of early juvenile crabs is difficult in coenobitid species (Okinawa Prefectural Board of Education ; Nakasone ; Hamasaki et al. ).…”

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Recruitment to adult habitats in terrestrial hermit crabs on the coast of Ishigakijima Island, Ryukyu Archipelago, Japan

Hamasaki

Fujikawa

Iizuka

et al. 2017

Invertebrate Biology

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Terrestrial hermit crabs in the family Coenobitidae (genera Coenobita and Birgus) are distributed in tropical and subtropical regions. They occupy various habitats ranging from shore to inland forests, and the two shore‐dwelling species, Coenobita rugosus and C. violascens, possess different distributional characteristics on Ishigakijima Island, Ryukyu Archipelago, Japan. Coenobita rugosus is distributed throughout the coast of the island and is abundant in beach areas, whereas C. violascens has mainly been found in river mouth areas. However, very little is known about the habitats used by the early life stages of coenobitid crabs because identifying the species of recently landed early juveniles is difficult. We tested whether the species compositions of early juveniles of coenobitids differed between beach and river mouth sites on Ishigakijima Island. We collected and identified the early stage coenobitids using PCR–RFLP techniques. A total of 576 early juveniles of five Coenobita species were collected, of which 0.7% were C. brevimanus, 7.3% were C. cavipes, 0.2% were C. purpureus, 70.1% were C. rugosus, and 21.7% were C. violascens. The early juveniles of Birgus latro were not found. The early juveniles of C. rugosus occurred at both beach and river mouth sites, and they were abundant at beach sites. The early juveniles of C. violascens were only found at river mouth sites. These findings indicate that C. rugosus and C. violascens complete their life cycles on land near the localities where they land. The early juveniles of the inland‐dwelling species, C. cavipes, were also mainly collected from river mouth sites, which suggested that juveniles of C. cavipes selected landing sites near river mouth areas and then migrated into the inland forests, passing through riverside areas. Our results highlighted the importance of river mouth areas for recruitment to adult habitats by some coenobitid species.

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Section: Methodssupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 97%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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