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elements surrounded by parenchyma that enter the secondary xylem of the host plant. Here we report for the first time the effects of Pilostyles parasitism on host secondary xylem. We obtained healthy and parasitized stems from Mimosa foliolosa, M. maguirei and M. setosa and compared vessel element

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In: IAWA Journal

., 2014 , 2015 ). As the barnacles D. sinensis and O. bullata are commonly found on P. sanguinolentus in the coastal waters of P. R. China (Yang et al., 2014 , 2015 ), we intended to quantify the seasonal variation of infestation by O. bullata and its interactions with the parasitism of D

In: Crustaceana

. SPRYSECs were always specifically upregulated at J2 or at the very early stages of parasitism (Fig. 2A). By contrast, SPRY domain proteins with no signal peptide showed different expression profiles and were frequently constitutively expressed across the life cycle (often at a very low level) or, in some

In: Nematology

Nematology Monographs & Perspectives, 2004, Vol. 2, 581-588 Parasitism gene discovery in sedentary phytonematodes Thomas J. BAUM 1,*, Richard S. HUSSEY 2 and Eric L. DAVIS 3 I Department ofPlant Pathology, Iowa State University, 351 Bessey Hall, Ames, lA 50011, USA 2 Department ofPlant Pathology

In: Proceedings of the Fourth International Congress of Nematology, 8-13 June 2002, Tenerife, Spain

coleopterans, for instance B. hylobii (Hymenoptera: Braconidae) produced parasitism on Hylobius abietis (Coleoptera: Curculionidae) on felled Sitka spruce and Lodgepole pine sites (Moran, 2012 ). Bracon ( Uncobracon ) apoderi Watanabe use three weevil species as hosts, including Apoderus balteatus

In: Animal Biology

Abstract

The sand lizard (Lacerta agilis) is a common species in Europe that inhabits a wide range of habitats, including anthropogenic environments. It is a frequent carrier of common ticks (Ixodes ricinus), which poses a severe threat to the lizards’ health. We determined the living space used by lizards in a rapidly changing environment and ascertained the number of parasitic ticks found throughout the reptile’s active season. We conducted telemetry research on a dynamically developing housing estate located on the outskirts of the city of Zielona Góra (western Poland) in 2016-2017. We obtained data from 16 adult lizards, from which we collected 2529 ticks. Using generalized linear models (GLMs), we determined the relationships among the number of transmitted parasites, size of occupied areas (minimum convex polygon, MCP), the weight of lizards, and sex of lizards. Results indicated that the number of ticks was negatively correlated with lizard body mass, but positively correlated with home range. Sex was not significantly associated with the number of ticks. Additionally, the parasite load was lower during the lizard’s non-breeding season than during the breeding season and was lower for males than for females during the non-breeding season. Males have larger home ranges than females.

In: Amphibia-Reptilia

Nematology , 2000, Vol. 2(6), 587-590 Nematode parasitism of harvestmen (Opiliones: Arachnida) George O. P OINAR , J R 1, * , Bo´zidar P.M. Ï C UR Ï CIC 2 , Ivo M. K ARAMAN 3 , James C. C OKENDOLPH ER 4 and Plamen G. M ITOV 5 1 Department of Entomology, Oregon State University

In: Nematology

The once widespread and abundant Middle Eastern tree, Ziziphus spina-christi (Rhamnaceae—common name = Christ's thorn), has a new threat to its survival, the invasion and heavy parasitism (ca. 80% of trees) by the hemiparasitic mistletoe Plicosepalus acaciae. This mistletoe, which largely parasitizes Acacia tree species, has spread rapidly from its original range in the southern desert region of Israel into the rest of the country since the 1960s. The reason for the rapid invasion of this mistletoe (and increase in abundance in its native range) is purported to be the rapid increases in the populations of the main disperser of the mistletoe's fruit, the yellow-vented bulbul Pycnonotus xanthopygos. This bird breeds in human settlements, which have become substantially larger and more widespread in recent years. Because mistletoes are known to be profligate users of water, we hypothesized that the reason for the widespread senescence and mortality of Ziziphus spina-christi was the higher water stress placed on parasitized trees. We found no significant effect of mistletoe infestation on Z. spina-christi current water status. However, we found that the trees with higher levels of infestation have more dry branches, indicating that the water status of the Z. spina-christi in the longer term has been compromised by the mistletoe infestation. Moreover, infested trees had significantly lower fruit production than uninfested trees. In contrast, mistletoes produced fruit more successfully on trees where infestation was heavier. We conclude that mistletoe has a significant negative impact on Z. spina-christi and that control of its disperser, the yellow-vented bulbul, is the most effective means of limiting this problem.

In: Israel Journal of Plant Sciences

Nematology Monograph s & Perspectives, 2004, Vol. 2, 573-579 On the evolution of parasitism genes Geert SMANT 1,*, Eric L. D AVIS 2, Richard S . HUSSEY 3, Thomas J. B AUM 4, Marie-Noelle Rosso S, Jaap B AKKER 1 and Johannes H ELDER 1 I Laboratory ofNematology, Department ofPlant Sciences

In: Proceedings of the Fourth International Congress of Nematology, 8-13 June 2002, Tenerife, Spain
Author: L.L. Soldaat

, parasitism, seasonal variation, Tyria jacobaeae. INTRODUCTION Variation in food quantity is an important factor in the population dynamics of the monophagous cinnabar moth, Tyria jacobaeae L. In most areas where Tyria occurs, the larvae frequently defoliate their food plants (Senecio jacobaea L.) completely

In: Netherlands Journal of Zoology