Temporal variations in the air, soil, and fiddler crab (Austruca perplexa) burrow temperatures in southern Thailand

We studied the population structure ofUca bengaliCrane, 1975 (crab density, sex ratio, and body size (i.e., carapace length and width, major claw length and width)), along with burrow characteristics (diameter, length, depth, and volume) as well as sediment characteristics (percent moisture content and organic matter) along a bank gradient at three distances (2, 4 and 6 m) from the edge of a tidal river. The results showed no differences in crab density, sex ratio, and body size among the three distances. The percent moisture content at 2 m distance was higher than at 4 and 6 m, and the percentage organic matter at 2 m distance was higher than at 6 m distance. Burrows were shorter in length, shallower in depth, and smaller in volume at 2 m distance, but these measures increased with increasing distance from the river edge. Both males and females made three distinct burrow shapes: I, J and U; the J-shaped burrows were the most numerous at all distances.

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Spatial and temporal variations on the coexistence of Aedes and Culex larvae in Southern Thailand

Journal of Animal Behaviour and Biometeorology ◽

10.31893/jabb.20033 ◽

2020 ◽

Vol 8 (4) ◽

pp. 250-256

Author(s):

Anantanit Chumsri ◽

Mullica Jaroensutasinee ◽

Krisanadej Jaroensutasinee

Keyword(s):

Temporal Variations ◽

Spatial And Temporal Variations ◽

Southern Thailand

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Burrow excavation and mudballing behaviour of the fiddler crab Uca annulipes (H. Milne Edwards, 1837) from southern Thailand

Crustaceana ◽

10.1163/15685403-00003694 ◽

2017 ◽

Vol 90 (6) ◽

pp. 735-743 ◽

Cited By ~ 2

Author(s):

Fahmida Wazed Tina ◽

Mullica Jaroensutasinee ◽

Krisanadej Jaroensutasinee

Keyword(s):

Fiddler Crab ◽

Carapace Width ◽

Southern Thailand ◽

Burrow Entrance ◽

Uca Annulipes ◽

Males And Females ◽

Time Required ◽

Building Behaviour

We video-recorded and examined the burrow building behaviour of small and large males and females ofUca annulipes(H. Milne Edwards, 1837). Males took a longer time than females, and larger crabs took a longer time than smaller ones, to build burrows. Higher numbers of mudballs were excavated from inside the burrows during the build of the burrows by males than by females, and by larger crabs than by smaller ones. Crab carapace width was positively correlated with the time required to build burrows, and with the number of mudballs excavated from inside the burrows during the build of these burrows. We observed that 82% of the females placed the mudballs near their burrow entrance, whereas 85% of the males placed the mudballs far from their burrow entrance. After building the burrows, 71% of the females went inside the burrow and plugged the burrow entrance, and 90% of the males foraged for food.

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Reproductive status and burrow characteristics of females of the fiddler crab Tubuca rosea (Tweedie, 1937) (Brachyura, Ocypodidae) in southern Thailand

Crustaceana ◽

10.1163/15685403-00003822 ◽

2018 ◽

Vol 91 (11) ◽

pp. 1367-1374

Author(s):

Kanitta Keeratipattarakarn ◽

Fahmida Wazed Tina ◽

Mullica Jaroensutasinee ◽

Krisanadej Jaroensutasinee

Keyword(s):

Fiddler Crab ◽

Reproductive Status ◽

Fiddler Crabs ◽

Southern Thailand ◽

First Time

Abstract We investigated the burrow characteristics (shapes, diameters, total and horizontal lengths, total depths, ground and mid angles, and volumes) of 39 large-sized Tubuca rosea (Tweedie, 1937) females (22 ovigerous; 17 non-ovigerous). We observed I- and J-shaped burrows in both ovigerous and non-ovigerous females, with higher numbers of J-shaped burrows in ovigerous females. However, in non-ovigerous females, I- and J-shaped burrow numbers were not different. Other burrow characteristics had higher values in ovigerous females than in non-ovigerous females. In ovigerous females, I- and J-shaped burrows were not different in diameters, total lengths, total depths, or volumes, but horizontal lengths, ground angles and mid angles were higher in J-shaped burrows. In non-ovigerous females, burrow characteristics (except diameter) were higher in J-shaped burrows than in I-shaped burrows. Our results show for the first time that burrow characteristics differ based on the reproductive status of female fiddler crabs in T. rosea.

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Burrow characteristics and temporal variation in burrow temperature of the fiddler crab Tubuca rosea (Tweedie, 1937) (Brachyura, Ocypodidae) in southern Thailand

Crustaceana ◽

10.1163/15685403-bja10063 ◽

2020 ◽

Vol 93 (9-10) ◽

pp. 1153-1167

Author(s):

Kanitta Keeratipattarakarn ◽

Fahmida Wazed Tina ◽

Mullica Jaroensutasinee ◽

Krisanadej Jaroensutasinee ◽

Anantanit Chumsri ◽

...

Keyword(s):

Soil Temperature ◽

Temporal Variation ◽

Fiddler Crab ◽

Temperature Sensors ◽

Male And Female ◽

Opposite Result ◽

Southern Thailand ◽

Suitable Temperature ◽

Soil Temperatures

Abstract This study investigates the burrow temperature of large-sized male and female Tubuca rosea (Tweedie, 1937) crabs as well as the soil temperature near their burrows during the day and night. Burrow and soil temperatures were measured using temperature sensors and burrow characteristics were recorded. Both sexes built I- and J-shaped burrows. Female burrows were longer and deeper than male burrows, since female burrows act as breeding burrows in this species. J-shaped burrows were longer and slightly deeper than I-shaped ones. During the day, the burrow temperature was lower than the soil temperature; however, during the night, the opposite result was observed. The burrow length/depth was negatively correlated with the burrow temperature during the day, but these correlations were positive during the night. This study shows that the burrow characteristics of T. rosea modulate the inside temperature of the burrows, maintaining a suitable temperature for the crabs.

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