Eight new records of crabs (Decapoda, Brachyura: Sesarmidae, Varunidae) from the coasts of Taiwan

Li, Jheng-Jhang; Hsu, Jhih-Wei; Ng, Ngan Kee; Shih, Hsi‐Te

doi:10.1163/15685403-00003935

Cited by 6 publications

(12 citation statements)

References 13 publications

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“…Among the ten species of Ptychognathus from Taiwan, there are two species widely distributed from Japan to Indonesia (P. aff. barbatus and P. altimanus; Sakai, 1976;Dai and Yang, 1991;Naruse et al, 2005;Ng et al, 2017); four temperate species (P. hachijoensis, P. insolitus, P. ishii, and P. takahasii; Sakai, 1976;Li, 2015); two tropical species (P. stimpsoni and P. pilosus; Li et al, 2019a;Hsu and Shih, 2020); and two species with narrow distributional range (only in Taiwan currently) (P. makii and P. sakaii sp. nov.; Hsu and Shih, 2020; this study).…”

Section: Acknowledgementsmentioning

confidence: 99%

Description of a new species of brackish-water crab of the genus Ptychognathus Stimpson, 1858 (Crustacea: Brachyura: Varunidae) from southern Taiwan

Hsu

Shih

2022

Nauplius

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The brackish-water crabs of the genus Ptychognathus Stimpson, 1858, the most diverse genus in the family Varunidae, inhabit the estuaries or seashores influenced by freshwater. Ptychognathus sakaii, a new species from Kenting, southern Taiwan, is described in this study, with a comprehensive key to the ten species of this genus from Taiwan. This new species is similar to its congeners, but can be distinguished mainly by the features of the carapace, ambulatory legs, and male first gonopods.

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Section: Acknowledgementsmentioning

confidence: 99%

Description of a new species of brackish-water crab of the genus Ptychognathus Stimpson, 1858 (Crustacea: Brachyura: Varunidae) from southern Taiwan

Hsu

Shih

2022

Nauplius

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“…Distribution is limited by the coastal vegetation of the reef [60]; it inhabits the coastal shrub belt and coastal forest [59].…”

Section: Cardisoma Rotundummentioning

confidence: 99%

“…It lives in the reef and coastal forest [60]; inhabits land near the inland waters, 0.62 km from the sea [52]; inhabits a muddy environment, digging deep holes to live in, all the way to where there is groundwater [59]. Caves appear near water, including coastal forests, banana plantations, and roadsides, and the water at the bottom of the cave is freshwater [51].…”

Section: Cardisoma Hirtipes (Discoplax Hirtipes)mentioning

confidence: 99%

“…The habitat is closer to the sea and located near the grass or some estuary meadows of coastal forests, but there are also individuals living in coastal forests, currently recorded as far away from the sea as 300 m [52]; inhabiting a muddy environment [60]; the cave is very deep, all the way to where there is groundwater [59]; the water in the cave is brackish or pure freshwater [51].…”

Section: Cardisoma Carnifexmentioning

confidence: 99%

“…The distribution is limited by the coastal vegetation of the reef, perched on the outskirts of the coastal forest, under ready-made high coral reef caves and shallow rocks, rarely digging [60]; inhabiting the pores or reefs of coastal thickets and edge rocks or coral reefs, usually not more than 50 m away from the sea pass [51,52].…”

Section: E Politusmentioning

confidence: 99%

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Deterioration of Coastal Ecosystem: A Case Study of the Banana Bay Ecological Reserve in Taiwan

Tsai

Seino

Lee

2022

Land

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Due to the increasing pressure on the environment from human activities, there is a growing need to understand the relationship between species and the environment. Therefore, this study constructs life cycle and niche from a geographic perspective, aiming to explain how existing spatial configurations affect the deterioration of coastal ecosystems. This research mainly adopts the method of literature analysis and field investigation, and then carries out four steps of reading, sorting, integration and analysis. In this study, the road kill data and living environment data of land crabs were integrated, and two results were obtained on the relationship between spatial conflict areas and land crab populations. The first is that the life cycle of land crabs is disturbed by TPH 26, thus confirming the spatial conflict hypothesis; the peak period of traffic flow at TPH 26 overlapped with the peak period of land crab larvae release, indicating that the spatial configuration of the reserve is not only a spatial conflict, but also a spatial-temporal conflict. Second, the land crab is an important indicator of coastal forests, and its niche also reflects geographic diversity, especially in features such as topographic structure, geological stability, and environmental humidity.

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The role of anthropogenic disturbance and invasion of yellow crazy ant in a recent decline of land crab population

Lee

Chiu

Shih

et al. 2021

Sci Rep

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The yellow crazy ant, Anoplolepis gracilipes was first reported in Kenting National Park, Taiwan, in the 2000s, raising the concern of this invasive ant’s potential effects on the native land crab populations. We investigated the distribution and abundance of A. gracilipes and its adverse effect on the land crab populations at four land crab hotspots within the park. Our survey results indicated that A. gracilipes was widespread and abundant at three of the study sites (Hsiangchiaowan, Shadao, and Natural Spring), while the distribution was much more confined at the fourth site (Houwan). Land crab populations experienced a notable decline at all the study sites except Houwan, indicating an inverse relationship between the population of land crabs and distribution/abundance of A. gracilipes. Combining the results of visual observations, the decline of land crab populations can be attributed, at least partially, to direct attacks by A. gracilipes on land crabs in their natural habitat and during the breeding migration season. Generalized additive model showed that worker abundance of this ant is associated with human disturbance levels, suggesting that anthropogenic disturbance may have contributed to the decline in land crab populations via promoting the abundance of A. gracilipes.

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Eight new records of crabs (Decapoda, Brachyura: Sesarmidae, Varunidae) from the coasts of Taiwan

Cited by 6 publications

References 13 publications

Description of a new species of brackish-water crab of the genus Ptychognathus Stimpson, 1858 (Crustacea: Brachyura: Varunidae) from southern Taiwan

Description of a new species of brackish-water crab of the genus Ptychognathus Stimpson, 1858 (Crustacea: Brachyura: Varunidae) from southern Taiwan

Deterioration of Coastal Ecosystem: A Case Study of the Banana Bay Ecological Reserve in Taiwan

The role of anthropogenic disturbance and invasion of yellow crazy ant in a recent decline of land crab population

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