First record of the tadpole shrimp Triops cancriformis (Lamarck,1801) (Crustacea: Branchiopoda: Notostraca) in Portugal

Three species of tadpole shrimp, i.e., Triops granarius (Lucas, 1864), Triops longicaudatus (LeConte, 1846) and Triops cancriformis (Bosc, 1801-1802), have been known from Japan. In this paper the author describes a fourth Triops species (= Triops strenuus Wolf, 1911) living in the rice paddies of a southern area of Honshu, the largest of the four main islands of Japan. This species was probably endemic to the Australian continent, and no habitat distribution outside Australia has been reported so far. The impact on the existing ecosystem of Japan is quite unknown, and therefore, it is necessary to announce this intrusion into Japan in order to clarify the invasion route, habitat ecology, and the future measures against this new alien species. This invasion is considered to be caused by the resting eggs brought together with silica sand (imported from Western Australia into Japan for the large-scale beach improvement). The results presented here also describe the phylogenetic relationship with all the Australian species described so far, but also all the known Triops species of the world, based on the nucleotide sequences of mitochondrial DNA.

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Precise mapping and dynamics of tRNA-derived fragments (tRFs) in the development of Triops cancriformis (tadpole shrimp)

BMC Genetics ◽

10.1186/s12863-015-0245-5 ◽

2015 ◽

Vol 16 (1) ◽

Cited By ~ 19

Author(s):

Yuka Hirose ◽

Kahori T. Ikeda ◽

Emiko Noro ◽

Kiriko Hiraoka ◽

Masaru Tomita ◽

...

Keyword(s):

Triops Cancriformis ◽

Precise Mapping ◽

Tadpole Shrimp

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A record of Notostraca on Socotra Island and the importance of local conservation of the habitat

Zootaxa ◽

10.11646/zootaxa.4446.4.8 ◽

2018 ◽

Vol 4446 (4) ◽

pp. 555

Author(s):

KAY VAN DAMME

Keyword(s):

Middle Eastern ◽

First Record ◽

Phylogenetic Position ◽

Local Conservation ◽

Asian Populations ◽

Socotra Island ◽

African Populations ◽

Tadpole Shrimp ◽

Archeological Site ◽

African Clade

The first record of Triops Schrank, 1803 (Crustacea: Branchiopoda: Notostraca: Triopsidae) from Socotra Island is presented herein. Besides Madagascar and the current note, the genus is unknown from Indian Ocean islands. A brief morphological exploration indicates that the Socotran Triops cf. granarius (Lucas, 1864) (trachyaspis form) belongs to an African clade within this widespread Old World species complex and not to T. granarius s.str. from East Asia. Detailed morphological and molecular revision of the poorly studied Middle Eastern and Northern African populations in comparison to East Asian populations are needed to understand this group and the phylogenetic position and status of the Socotran tadpole shrimp. Found in a single locality (the archeological site Eriosh) in the rapidly changing coastal plains on Socotra, together with other large branchiopods (endemic Anostraca and unidentified Spinicaudata), the insular Triops population and the regionally neglected temporary lake habitat deserve a special protection status from a biodiversity conservation perspective. Triops cf. granarius is hereby suggested as a local flagship species for the conservation of temporary pool habitats on the island.

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Phenotypic plasticity of senescence in Daphnia under predation impact: no ageing acceleration when the perceived risk decreases with age

Royal Society Open Science ◽

10.1098/rsos.191382 ◽

2020 ◽

Vol 7 (2) ◽

pp. 191382 ◽

Cited By ~ 1

Author(s):

Barbara Pietrzak ◽

Max Rabus ◽

Maciej Religa ◽

Christian Laforsch ◽

Maciej J. Dańko

Keyword(s):

Life History ◽

Predation Risk ◽

Perceived Risk ◽

Life History Theory ◽

Prey Size ◽

Daphnia Pulex ◽

Adaptive Responses ◽

Invertebrate Predators ◽

Triops Cancriformis ◽

Tadpole Shrimp

Recognising the nature of the predation risk, and responding to it accurately, is crucial to fitness. Yet, even the most accurate adaptive responses to predation risk usually entail costs, both immediate and lifelong. Rooting in life-history theory, we hypothesize that an animal can perceive the nuances of prey size and age selectivity by the predator and modulate its life history accordingly. We test the prediction that—contrary to the faster or earlier senescence under predation risk that increases with prey size and age—under predation risk that decreases with prey size and age either no senescence acceleration or even its deceleration is to be observed. We use two species of indeterminate growers, small crustaceans of the genus Daphnia , Daphnia Pulex and Daphnia magna , as the model prey, and their respective gape-limited invertebrate predators, a dipteran, midge larva Chaoborus flavicans , and a notostracan, tadpole shrimp Triops cancriformis . We analyse age-specific survival, mortality and fertility rates, and find no senescence acceleration, as predicted. With this study, we complete the picture of the expected non-consumptive phenotypic effects of perceived predation pressure of different age-dependence patterns.

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