Do predator cues influence turn alternation behavior in terrestrial isopods Porcellio laevis Latreille and Armadillidium vulgare Latreille?

2014 ◽  
Vol 106 ◽  
pp. 168-171 ◽  
Author(s):  
Kevin G. Hegarty ◽  
Scott L. Kight
Keyword(s):  
Alternation Behavior ◽  
Predator Cues ◽  
Terrestrial Isopods ◽  
Armadillidium Vulgare ◽  
Porcellio Laevis

scholarly journals Occurrence of the Isopod Iridovirus in European Armadillidium and Porcellio (Crustacea, Isopoda)

1985 ◽  
Vol 55 (2) ◽  
pp. 280-282 ◽  
Author(s):  
George O. Poinar ◽  
Roberta T. Hess ◽  
Jan H. Stock
Keyword(s):  
The Netherlands ◽  
First Record ◽  
Blue Color ◽  
Porcellio Scaber ◽  
Terrestrial Isopods ◽  
Armadillidium Vulgare ◽  
Bright Blue

First record of iridovirus infections of terrestrial isopods (Armadillidium vulgare and Porcellio scaber) in Europe (The Netherlands). Infested specimens can be detected by their bright blue color.

Effet du champ magnétique statique sur les préférences écologiques de trois isopodes terrestres (Isopoda, Oniscidea)

Crustaceana ◽  
2019 ◽  
Vol 92 (11-12) ◽  
pp. 1387-1401
Author(s):  
Mustapha Béjaoui ◽  
Noureddine Khalloufi ◽  
Ezzeddine Mahmoudi ◽  
Samir Touaylia
Keyword(s):  
Nous Avons ◽  
Armadillidium Vulgare ◽  
Champ Magnétique ◽  
Porcellio Laevis

Résumé Dans ce travail, nous avons analysé les préférendums photique, thermique, hygrique et granulométrique de trois espèces d’isopodes terrestres : Armadillidium vulgare (Latreille, 1804), A. granulatum (Brandt, 1833), et Porcellio laevis Latreille, 1804 en réponse à un champ magnétique statique (CMS) (0 Hz, 200 mT). Les animaux exposés au CMS montrent une augmentation significative du nombre des spécimens photophiles et une diminution significative des animaux photophobes. Ces cloportes montrent aussi une diminution significative des spécimens préférant le froid et une augmentation significative de ceux préférant le compartiment chaud. Cette exposition au CMS cause un inversement très significatif du choix préférentiel du compartiment humide au compartiment sec chez A. vulgare et P. laevis, alors que ce changement n’est pas significatif chez A. granulatum. Cette même exposition a entrainé une nette perturbation du choix de la granulométrie du substratum, en particulier pour le gravier chez A. vulgare.

Occurrence of cystacanths of Plagiorhynchus cylindraceus (Acanthocephala) in the terrestrial isopods Trachelipus squamuliger and Armadillidium vulgare (Oniscidea) in Bulgaria

2009 ◽  
Vol 54 (1) ◽  
Author(s):  
Zlatka Dimitrova
Keyword(s):  
Host Record ◽  
Passerine Birds ◽  
New Host ◽  
Terrestrial Isopods ◽  
Armadillidium Vulgare ◽  
New Host Record ◽  
Negative Effect ◽  
Males And Females ◽  
Acanthocephalan Parasite ◽  
Plagiorhynchus Cylindraceus

AbstractIn total, 2097 individuals of Trachelipus squamuliger and 20 individuals of Armadillidium vulgare from four habitats (three woodland sites and one pasture) in the region of Stara Zagora, Bulgaria, were examined for the presence of cystacanths of Plagiorhynchus cylindraceus, a common acanthocephalan parasite of passerine birds. In T. squamuliger from woodland habitats, cystacanths were found with prevalence 4.0–9.3%, intensity 1–5 (mean 1.22–1.57) and mean abundance 0.057–0.113. No significant differences were observed between infections in males and females of T. squamuliger. None of the T. squamuliger individuals from the pasture examined was infected. Out of 48 infected females of T. squamuliger, only one had developed eggs (in agreement with previous studies revealing the negative effect of the cystacanths on the development of female gonads of woodlice). One individual of A. vulgare was infected with a single cystacanth. The occurrence of P. cylindraceus in T. squamuliger is a new host record.

Terrestrial life in isopods: evolutionary loss of gas-exchange and survival capability in water

1993 ◽  
Vol 71 (7) ◽  
pp. 1372-1378 ◽  
Author(s):  
Barbara E. Taylor ◽  
Thomas H. Carefoot
Keyword(s):  
Oxygen Consumption ◽  
Gas Exchange ◽  
Oxygen Uptake ◽  
Fresh Water ◽  
Porcellio Scaber ◽  
Progressive Decline ◽  
Terrestrial Species ◽  
Terrestrial Isopods ◽  
Armadillidium Vulgare ◽  
Terrestrial Life

Survival and oxygen uptake in air and water were investigated in four species of terrestrial isopods, Armadillidium vulgare Latreille, 1804, Porcellio scaber Latreille, 1804, Oniscus asellus Linné, 1758, and Ligia pallasii Brandt, 1833, to compare the degree of vestigial adaptation to aquatic existence versus adaptation to terrestrial existence. Most submerged A. vulgare, P. scaber, and O. asellus died by 18 h, whether in fresh water or isosmotic seawater. Ligia pallasii lived for almost 2 d in fresh water and for at least 25 d in seawater (none died during this time). Oxygen uptake in water was 44 – 66% that in air for the three fully terrestrial species, and 160% that in air for the semiterrestrial L. pallasii. Oxygen consumption of submerged A. vulgare (representative of fully terrestrial forms) declined to 50% after 14 h and to 17% by 24 h, by which time the animals were clinically dead. In comparison, L. pallasii's aquatic oxygen consumption was maintained at normal or higher levels for at least 3 d. All species could survive several hours of immersion in fresh water, sufficient to withstand temporary rain deluge. Ligia pallasii's superior capabilities to survive and respire in seawater reflect its greater similarity to aquatic ancestors, and an evolutionary series showing progressive decline in survival and gas-exchange capability in water would be as follows: L. pallasii > O. asellus > P. scaber ≥ A. vulgare.

scholarly journals The Mechanisms of Humidity Reactions of Terrestrial Isopods

1941 ◽  
Vol 18 (2) ◽  
pp. 115-135
Author(s):  
NADEJDA WALOFF
Keyword(s):  
Water Loss ◽  
Whole Body ◽  
Negative Phototaxis ◽  
Moist Air ◽  
Porcellio Scaber ◽  
Positive Phototaxis ◽  
Terrestrial Isopods ◽  
Armadillidium Vulgare

1. The humidity reactions of Oniscus asellus, Porcellio scaber and Armadillidium vulgare have been analysed and compared. 2. The mechanism whereby the three species collect in moist air is twofold, consisting of (a) hygrokinesis, or decrease in activity and speed in moist air, and (b) of more frequent turnings in space, retaining them in the areas of greater humidity. 3. These mechanisms are most clearly expressed in Oniscus asellus and least in Armadillidium vulgare. This sequence may be correlated with the resistance to desiccation of the three species, which is greatest in Armadillidium vulgare, and greater in Porcellio scaber than in Oniscus asellus. 4. It is suggested that the humidity reactions of isopods are controlled by water loss by evaporation from the whole body. 5. A correlation between hygrokinesis and thigmokinesis was observed in Porcellio scaber. 6. There appears to be a reversal from negative to positive phototaxis in Oniscus asellus, correlated with the water loss by evaporation. 7. The humidity reactions, low thigmokinesis and negative phototaxis combine to retain the isopods in damp, dark habitats.

Preliminary data on terrestrial isopods from some railways in Dobruja, eastern Romania

2021 ◽  
Vol 66 (1) ◽  
pp. 85-92
Author(s):  
Daniel-Răzvan Pop ◽  
Alexandra-Roxana-Maria Maier ◽  
Achim-Mircea Cadar ◽  
Sára Ferenți
Keyword(s):  
Preliminary Data ◽  
Railway Bridge ◽  
Railway Stations ◽  
Terrestrial Isopods ◽  
Terrestrial Isopod ◽  
Armadillidium Vulgare ◽  
Number Of Species

In July 2020 we analyzed the terrestrial isopod assemblages from different (mostly abandoned) railway constructions in Dobruja, eastern Romania. We identified 10 terrestrial isopod species, of which the most abundant and frequent were Porcellionides pruinosus (Brandt, 1833) and Armadillidium vulgare Latreille, 1804. We identified species that, in Romania, are present only in Dobruja: Leptotrichus pilosus Dollfus, 1905 and Trachelipus squamuliger (Verhoeff, 1907). Most of the species are common, generalist or synanthropic, connected to dry and open habitats. In abandoned railway-stations the number of species/samples was low (at most two), but at the base of a stone railway bridge in Babadag forest six species were found.

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