Variation in the Branchial Formula of Semiterrestrial Crabs (Decapoda: Brachyura: Grapsidae and Ocypodidae) in Relation to Physiological Adaptations to the Environment

Takeda, Satoshi; Matsumasa, Masatoshi; Kikuchi, S.; Poovachiranon, Sombat; Murai, Minoru

doi:10.2307/1548737

Cited by 17 publications

(15 citation statements)

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“…The anterior gills have thin epithelia (2-4·m) and are the site for respiration. The posterior gills, which contain numerous mitochondria and membrane foldings for active ion regulation, are thicker (10-20·m) and are responsible for osmoregulation (Barra et al, 1983;Péqueux, 1995;Takeda et al, 1996;Luquet et al, 2000;Lin et al, 2002). The posterior gill also has functional differentiation between thin and thick epithelium for uptake of different ions (Goodman and Cavey, 1990;Onken and McNamara, 2002).…”

Section: Introductionmentioning

confidence: 99%

V-type H+-ATPase and Na+,K+-ATPase in the gills of 13 euryhaline crabs during salinity acclimation

Tsai

Lin

2007

Journal of Experimental Biology

127

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SUMMARY Because of their diverse habitats, crabs are excellent experimental species to study owing to the morphological changes and physiological adaptation that occur during their terrestrial invasion. Their hemolymphic osmoregulation in brackish water is crucial for a successful terrestrial invasion. Crabs can actively uptake or excrete ions upon salinity change, and the gills play a major role among the osmoregulatory organs. Several enzymes are involved in the osmoregulatory process, including Na+,K+-ATPase and V-type H+-ATPase (V-H+-ATPase). Na+,K+-ATPase is the driving force in establishing an ion gradient across the epithelial cell membrane in marine crabs. It has been reported that the osmoregulatory mechanisms in freshwater crabs are different from those in marine ones, suggesting that the driving force may come from V-H+-ATPase by generating the H+ ion gradient to facilitate the ion flow. Thirteen crab species from two families were used in this study. These crabs lived in five different habitats, including marine,intertidal, bimodal, freshwater and terrestrial habitats. The distribution of V-H+-ATPase in the 13 euryhaline crabs was revealed by histochemistry. V-H+-ATPase was localized in the apical region in crabs that could survive in the freshwater environment. We found that the freshwater and terrestrial crabs with stable Na+,K+-ATPase activity during salinity changes tended to have an apical V-H+-ATPase, whereas the intertidal ones with varying Na+,K+-ATPase activity showed a cytoplasmic V-H+-ATPase distribution. Finally, in Uca formosensis, a crab that had stable Na+,K+-ATPase activity, a significant difference in V-H+-ATPase activity between salinities was found. In conclusion, the hypothesis that V-H+-ATPase plays a crucial role in the freshwater adaptation of crabs is supported by our systemic investigation on 13 euryhaline crabs.

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Section: Introductionmentioning

confidence: 99%

V-type H+-ATPase and Na+,K+-ATPase in the gills of 13 euryhaline crabs during salinity acclimation

Tsai

Lin

2007

Journal of Experimental Biology

127

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“…This may explain the uniform density of the crabs. In our study area, however, we saw little predation on the fiddler crabs, and U. vocans and small ocypodid crabs, Dotilla myctiroides (Milne-Edwards, 1852) (Matsumasa et al, 1992;Takeda et al, 1996), wandered around the tidal flat to feed. The difference in dependence on the rocks for feeding between U. panamensis and U. tetragonon may be related to the difference in predation pressure.…”

Section: Feeding Habitmentioning

confidence: 68%

“…U. vocans occupies the same tidal level on the muddy-sandy shore, and Uca (Leptuca) annulipes (MilneEdwards, 1837) (sensu Rosenberg, 2001) occupies the sandy shore between the high water levels of neap and spring tides (Takeda et al, 1996).…”

Section: Distributionmentioning

confidence: 99%

“…tetragonon inhabits sandy shores in East Africa (Crane, 1975;Icely & Jones, 1978), but rocky shores in Southeast Asia (Frith, 1977;Frith & Frith, 1977Takeda et al, 1996). To understand the adaptation to the sandy shore by U. tetragonon in East Africa, further information on habitat, food sources, and the use of the minor chelipeds is required.…”

Section: Feeding Substrate and Minor Chelipedsmentioning

confidence: 99%

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Adaptations for feeding on rock surfaces and sandy sediment by the fiddler crabs (Brachyura: Ocypodidae) Uca tetragonon(Herbst, 1790) and Uca vocans(Linnaeus, 1758)

2004

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Two species of fiddler crab, Uca tetragonon (Herbst, 1790) and Uca vocans (Linnaeus, 1758), which belong to the subgenus Gelasimus, dwell on rocky shores and muddy-sandy tidal flats, respectively, in Phuket Is., Thailand. We investigated their feeding ecology in relation to the morphology of their feeding organs: minor food-handling chelipeds and maxillipeds. U. tetragonon fed chiefly on rocks covered by filamentous green algae. U. vocans fed on the emerged sand and in shallow water along the shoreline and in pools. While feeding, both crabs made sand pellets beneath their mouthparts and discarded them, indicating that they divided the matter scooped up with their minor chelipeds into edible and inedible fractions by using the maxillipeds in the water passing through their buccal cavity. The morphology of maxillipeds hardly differed between the two species, which means that both species are flotation-feeders. The morphology of their minor chelipeds, however, differed: the tips of the dactyl and pollex were flat in U. tetragonon and pointed in U. vocans. When the minor cheliped was closed, U. tetragonon had a hemispherical space in the distal one-fourth of the gape, which was closed by the framing keratin layers and a few setae of the dactyl and pollex. On the other hand, U. vocans had an ellipsoidal space in the distal half of the gape. We consider these morphological characters to be adaptations to the different feeding substrates for retaining more food-laden sediment. We discuss the role of the setae on the minor chelipeds on the basis of the morphological differences between populations of U. tetragonon in Phuket Is. and East Africa where the crab inhabits muddy-sandy tidal flats.

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“…This characteristic difference in the AIS and BIS is similar to that of the other extrabranchial iontransporting organs mentioned above (Kikuchi et al, 1993;Kikuchi andMatsumasa, 1993a, b, 1995). An extremely deep BIS is also a common finding in gill epithelia of many other crustaceans (Gilles and Pequeux, 1985;Matsumasa and Kikuchi, 1993;Shires et al, 1994;Freire and McNamara, 1995;Hudson and Maitland, 1996;Takeda et al, 1996;Kikuchi and Shiraishi, 1997). Although the elaboration of the BIS is not largely affected by environmental salinity in most of the crustaceans mentioned above, a well-developed BIS is another characteristic of transporting epithelia.…”

Section: Discussionmentioning

confidence: 94%

Ultrastructural Evidence for Osmoregulatory Function of the Sternal Epithelia in Some Gammaridean Amphipods

Kikuchi¹,

Matsumasa²

1997

Journal of Crustacean Biology

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The ion-permeabilities and the ultrastructure of the sternal epithelia were studied in 7 species of gammaridean amphipods. Evidence has been obtained that the sterna can be divided into 2 categories: ion-transporting and non-ion-transporting types.The sterna of Sternomoera japonica, Grandidierella japonica, Melita setiflagella, and Corophium uenoi, belonging to the former category, are covered by ion-permeable cuticular layers lined with a thick epithelium, which is characterized by both a shallow apical infolding system (AIS) and a well-developed basolateral infolding system (BIS). The AIS is composed of frequent lamellar infoldings without mitochondrial association originating from the apical sides of the epithelia and involves virtually every part of the apical cell membrane, forming elaborate intercellular channels in the subcuticular space. In contrast, the BIS consists of deep infoldings of the basolateral cell membranes and extensive interdigitations between epithelial cells, which are both associated with a large number of mitochondria. This BIS involves the greater part of the cell membrane and constitutes a complicated, giant labyrinth of the intercellular spaces above the basal lamina. The AIS and BIS never communicate in the sternal epithelia, though they sometimes interpenetrate.On the other hand, the sterna of Jesogammarus jesoensis, Jesogammarus hinumensis, and Haustorioides sp., belonging to the latter category, are composed of an ion-impermeable, thick cuticular layer and a thin epithelium characterized by a paucity of mitochondria and complete lack of the BIS and AIS, which are common to those of the ordinary epithelium of the body surface.The results suggest a rather widespread occurrence in amphipods of a variety of extrabranchial ion-permeable areas of the body surface. They also suggest that the sterna lined with thick, specialized epithelia, together with the gills, are involved in the active transport of electrolytes in osmoregulation as well as respiration.

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Variation in the Branchial Formula of Semiterrestrial Crabs (Decapoda: Brachyura: Grapsidae and Ocypodidae) in Relation to Physiological Adaptations to the Environment

Cited by 17 publications

References 0 publications

V-type H+-ATPase and Na+,K+-ATPase in the gills of 13 euryhaline crabs during salinity acclimation

V-type H+-ATPase and Na+,K+-ATPase in the gills of 13 euryhaline crabs during salinity acclimation

Adaptations for feeding on rock surfaces and sandy sediment by the fiddler crabs (Brachyura: Ocypodidae) Uca tetragonon(Herbst, 1790) and Uca vocans(Linnaeus, 1758)

Ultrastructural Evidence for Osmoregulatory Function of the Sternal Epithelia in Some Gammaridean Amphipods

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