Occurrence pattern and reproductive ecology of the leucosiid crab &lt;i&gt;Pyrhila pisum&lt;/i&gt; (De Haan) in tidal flats in Hakata Bay, Fukuoka, Japan

Kobayashi, Satoshi; Archdale, Miguel Vázquez

doi:10.18353/crustacea.46.0_103

Cited by 10 publications

(20 citation statements)

References 27 publications

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“…This crab is commonly found in the intertidal areas of some tidal flats in temperate Japan. Although their occurrence in tidal flats is limited to the warmer season in western Japan (Kobayashi & Vazquez Archdale, 2017), observation and collection of P. pisum is comparatively easy in their natural habitat. They are found during the daytime actively wandering for long distances on sandy or muddy substrates along the shoreline, and often exhibit their mating behaviour without using shelters or burrows.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…They are found during the daytime actively wandering for long distances on sandy or muddy substrates along the shoreline, and often exhibit their mating behaviour without using shelters or burrows. Thus we have studied the ecology of this crab and recently reported its feeding habit, occurrence pattern in the intertidal area, reproductive ecology and mating behaviour (Kobayashi 2013; Kobayashi & Vazquez Archdale, 2017, 2020). We have revealed that the mating behaviour of P. pisum is not elaborate.…”

Section: Introductionmentioning

confidence: 99%

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Sexual traits and reproductive strategy of the leucosiid crab Pyrhila pisum

Kobayashi

Archdale

2020

J. Mar. Biol. Ass.

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Mating strategy and sexual dimorphism of morphological traits of the leucosiid crab Pyrhila pisum were elucidated by analysing relative growth patterns of chelipeds and abdomen, and gonad development patterns. Male adults had long chelipeds compared with juvenile males and females. Among male adults, two phases with different slopes could be found in the regression lines; their chelipeds growth pattern changed from negative allometry to positive and longer chelipeds developed in large adults. The growth is more markedly expressed in the merus than in the propodus. Female adults had wider abdominal segments and a thicker body compared with juvenile females and males. Abdomen of females was greatly enlarged by a puberty moult. Male adults had well-developed gonads similar to female adults, and the weights of male gonads were often larger than those of females of the same body size. For adult males, a negative correlation was detected between carapace width and the weight ratio of their gonads, but no significant relationship was detected for adult females. Females had large and well-bloated seminal receptacles, whose weight was nearly equal to gonad weight. There was little difference in the amount of seminal receptacles regardless of the body size of females. There is a trade-off relationship in the development between chelipeds and gonads in adult males. Probably young adult males compensate for the disadvantageous condition of guarding by increasing the number of spermatozoids, and old adult males invest more of their energy to their chelae for guarding while decreasing investment in sperm production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sexual traits and reproductive strategy of the leucosiid crab Pyrhila pisum

Kobayashi

Archdale

2020

J. Mar. Biol. Ass.

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“…Even ovigerous females usually fold their abdomens so closely to their thoracic part, that presence of embryos cannot be confirmed merely by external observation. These characteristics are considered to be adaptive for wandering and burying themselves in soft sediment, and defending themselves against large predators (Kobayashi & Vazquez Archdale, 2017). Probably their mating behaviour is also specific, in accordance with their life mode.…”

Section: Introductionmentioning

confidence: 99%

Mating behaviour of the leucosiid crabPyrhila pisum(De Haan, 1841)

Kobayashi¹,

Archdale

2019

J. Mar. Biol. Ass.

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Mating behaviour of the leucosiid crab Pyrhila pisum was studied in the laboratory and tidal flats in Japan. Most males actively approached females. Males started guarding females without any courtship behaviour (pre-copulatory guarding). Males began copulation within several minutes. The copulation continued for about 1–2 h, following which males began post-copulatory guarding. This guarding lasted from almost 0 to over 3 days, but its duration was generally much longer than that prior to copulation. Release of guarding was not linked to ovulation by females. Long-term rearing experiments revealed that both sexes of P. pisum could copulate multiple times with various mates. Developmental stages of the embryos recorded from copulating ovigerous females widely varied; their timing of copulation may not be fixed. In the tidal flat, wandering males frequently contacted with other individuals, but without distinguishing single males, single females and pairs of P. pisum, or Hemigrapsus takanoi. Male P. pisum cannot recognize female conspecifics, and they approach their mates relying only on vision, without using any attractive cues from females. In cases in which males encountered pairing crabs, they successfully stole the females when the guardians were smaller than the challengers, suggesting that effectiveness of guarding depends on male size. Among the mating pairs, males tended to be larger than females, and the tendency of size-assortative mating was weak or absent. Therefore, the mating behaviour of P. pisum is not elaborate, although their guarding behaviour may contribute to improve success to some degree.

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“…The preferences of feeds are changed by time and sex but usually it prefers bivalves especially Arcuatula senhousia and Venerupis philippinarum (Kobayashi 2013 ). At present, this species is considered a threatened endangered species due to reduction of tidal flats (Kobayashi and Archdale 2017 ). In this study, we sequenced the mitochondrial genome of P. pisum and figured out phylogenetic relationship to other organisms through comparative genomics.…”

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The first complete mitochondrial genome sequence of the leucosiid crab Pyrhila pisum (Arthropoda, Decapoda, Leucosiidae)

Park

Jung

et al. 2017

Mitochondrial DNA Part B

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Pyrhila pisum is known as leucosiid crab. So far, there is no study about whole mitochondrial genome in Leucosiidae family. Here, we report first the complete sequence of the mitochondrial genome from P. pisum, which is composed of 15,516 base pair encoding 13 protein-coding genes, 22 transfer RNAs, two ribosomal RNAs, and A þ T-rich region. The nucleotide composition of P. pisum was G þ C: 25.5%, A þ T: 74.5%, with a strong AT bias. In phylogenetic analysis using whole mitogenome, it was figured out that P. pisum was closely related to Sesarma neglectum but their family is different.

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Occurrence pattern and reproductive ecology of the leucosiid crab <i>Pyrhila pisum</i> (De Haan) in tidal flats in Hakata Bay, Fukuoka, Japan

Abstract: Abstract. Occurrence pattern and reproductive ecology of a leucosiid crab, Pyrhila pisum were surveyed in tidal flats in Hakata Bay, Fukuoka, northern Kyushu, Japan.

Cited by 10 publications

References 27 publications

Sexual traits and reproductive strategy of the leucosiid crab Pyrhila pisum

Sexual traits and reproductive strategy of the leucosiid crab Pyrhila pisum

Mating behaviour of the leucosiid crabPyrhila pisum(De Haan, 1841)

The first complete mitochondrial genome sequence of the leucosiid crab Pyrhila pisum (Arthropoda, Decapoda, Leucosiidae)

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