Settlement patterns of two sesarmid megalopae in the Sai River Estuary, Ishikawa Prefecture, Japan

Matsumoto, Takehiro; Arakawa, Hiroaki; Murakami, Takaya; Yanai, Seiji

doi:10.3800/pbr.15.306

Cited by 3 publications

(6 citation statements)

References 51 publications

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“…The observations suggest that O. dehaani larvae do not need to migrate offshore and, therefore, remain in nearshore waters (Baba, 1978 ; Saigusa, 1981 ). In support of this, O. dehaani larvae are more tolerant to low salinities than C. haematocheir and H. tridens larvae, supporting the idea that they complete their life cycle without migrating offshore (Irawan & Kijima, 1994 ; Matsumoto et al., 2020 ). If these reproductive and developmental traits limit the migratory range of the larvae, that may have driven the observation that O .…”

Section: Discussionmentioning

confidence: 54%

“…tridens inhabits muddy shores of the mid to high intertidal zone. In addition, these species are known to have different settlement patterns, presumably due to different preference for salinity and temperature (Matsumoto et al., 2020 ; Saigusa, 1981 ).…”

Section: Introductionmentioning

confidence: 99%

“…However, their habitats differ slightly each other (Miyake, 1983;Sakai, 1976): C. haematocheir inhabits mainly inland forest areas, O. dehaani occurs mainly in areas close to water, such as wetlands, and H. tridens inhabits muddy shores of the mid to high intertidal zone. In addition, these species are known to have different settlement patterns, presumably due to different preference for salinity and temperature (Matsumoto et al, 2020;Saigusa, 1981).…”

Section: Introductionmentioning

confidence: 99%

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Contrasting population genetic structure of three semi‐terrestrial brachyuran crabs on the coast of the Japanese archipelago

Yuhara,

Ohtsuki,

Hirota

et al. 2024

Ecology and Evolution

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Anthropogenic activities have reduced ecotones between the ocean and land, which is likely to threaten the population of brackish‐water brachyuran crabs. To assess the current status of these crabs, we examine the population genetic structures of three semi‐terrestrial brachyuran crabs widely distributed along the coast of the Japan and to clarify factors determining their genetic structures. We collected 184 Orisarma dehaani, 252 Chiromantes haematocheir, and 151 Helice tridens crabs from 36 localities of the Japanese archipelago. Genome‐wide SNP data from these crabs were analyzed using MIG‐seq. Bayesian clustering of STRUCTURE and DAPC analysis were used to identify genetically disturbed populations and to visualize genetic differentiation between local populations. Genetic population structure showed clear differentiation between populations on the Pacific coast of the Tohoku region and on other Japanese coasts in O. dehaani, but not in C. haematocheir or H. tridens. The inbreeding coefficient of O. dehaani was significantly higher on the Pacific coast of the Tohoku region compared to other Japanese coasts. C. haematocheir and H. tridens had homogeneous genetic structures along the Japanese coast, but showed genetic differentiation of a local population at their range limits. Thus, O. dehaani showed little gene flow and clear genetic differentiation between populations in the Tohoku Pacific region and those on other Japanese coasts due to ocean currents. Although such a regional differentiation was not found in C. haematocheir and H. tridens, one population of C. haematocheir was genetically isolated at the edge of its distribution range and likely vulnerable to environmental changes.

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Section: Discussionmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Contrasting population genetic structure of three semi‐terrestrial brachyuran crabs on the coast of the Japanese archipelago

Yuhara,

Ohtsuki,

Hirota

et al. 2024

Ecology and Evolution

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“…Similar patterns of megalopae and juvenile postlarvae recruitment occur in other true land crabs, such as the gecarcinids Gecarcinus and Johngarthia [e.g., ( 58 )], and in semiterrestrial crabs, such as the sesarmid Chiromantes spp. [e.g., ( 59 )]. Although the available evidence suggests that C. athanata was neither fully terrestrial nor semiterrestrial, unlike the groups mentioned above, it could provide an analog to modern primarily freshwater crabs or even have been a catadromous freshwater crab with marine larval development, whose early postlarvae were trapped in fluvio-estuarine to coastal settings.…”

Section: Discussionmentioning

confidence: 99%

Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous

et al. 2021

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“…Megalopae settle on riversides with brackish water and shift from a planktonic to a benthic lifestyle. After molting to the juvenile crab stage, they move from aquatic to land habitats (Kobayashi 2000, Matsumoto et al 2020, Murayama et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Dietary effects on larval survival and development of three sesarmid crabs

Toyota

Ichikawa

Suzuki

et al. 2023

Plankton Benthos Res

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Semi-terrestrial brachyuran sesarmid crabs are the most diverse and important faunal components of mangrove forest and temperate coastal communities worldwide. To establish a stable larval rearing method for understanding their larval developmental processes including molecular mechanisms of molting and metamorphosis, we examined the effects of diet on the survival and growth of three sesarmid crabs, Chiromantes haematocheir, Orisarma intermedium, and O. dehaani under larval development. Zoea of each species, immediately after hatching, were reared under different feeding conditions as follows: non-feeding; fed only nutrition-enriched rotifers; fed only Artemia (brine shrimp) nauplii; and fed a combination of both nutrition-enriched rotifers and brine shrimp. Larvae of each species survived almost to megalopa when they were fed both rotifer and brine shrimp, but all C. haematocheir larvae had died by zoeal stage 2 when they were only fed brine shrimp. Chiromantes haematocheir larvae could survive into the megalopa stage when fed only nutrition-enriched rotifer, whereas both O. dehaani and O. intermedium showed 50% or less survival and metamorphosis rates into megalopa. The duration of larval development and survival rates of the three crabs were shorter and higher, respectively, in the mixed feeding group (both rotifer and brine shrimp) than when only fed rotifer or brine shrimp. This study provides baseline knowledge of the interspecific variability in larval survival and duration under different diets for sympatric sesarmid crab species.

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Settlement patterns of two sesarmid megalopae in the Sai River Estuary, Ishikawa Prefecture, Japan

Cited by 3 publications

References 51 publications

Contrasting population genetic structure of three semi‐terrestrial brachyuran crabs on the coast of the Japanese archipelago

Contrasting population genetic structure of three semi‐terrestrial brachyuran crabs on the coast of the Japanese archipelago

Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous

Dietary effects on larval survival and development of three sesarmid crabs

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