The parasitoid complex attacking coexisting Spanish populations ofEuphydryas auriniaandEuphydryas desfontainii(Lepidoptera: Nymphalidae, Melitaeini)

2009 ◽  
Vol 43 (9-10) ◽  
pp. 553-568 ◽  
Author(s):  
Constantí Stefanescu ◽  
Josep Planas ◽  
Mark R. Shaw
Ecotoxicology ◽  
2021 ◽  
Author(s):  
Ambra Dell’Orso ◽  
Elena Kuzminsky ◽  
Victoria Bermejo-Bermejo ◽  
Raquel Ruiz-Checa ◽  
Rocío Alonso-Del Amo ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sunčica Stipoljev ◽  
Toni Safner ◽  
Pavao Gančević ◽  
Ana Galov ◽  
Tina Stuhne ◽  
...  

AbstractThe aoudad (Ammotragus lervia Pallas 1777) is an ungulate species, native to the mountain ranges of North Africa. In the second half of the twentieth century, it was successfully introduced in some European countries, mainly for hunting purposes, i.e. in Croatia, the Czech Republic, Italy, and Spain. We used neutral genetic markers, the mitochondrial DNA control region sequence and microsatellite loci, to characterize and compare genetic diversity and spatial pattern of genetic structure on different timeframes among all European aoudad populations. Four distinct control region haplotypes found in European aoudad populations indicate that the aoudad has been introduced in Europe from multiple genetic sources, with the population in the Sierra Espuña as the only population in which more than one haplotype was detected. The number of detected microsatellite alleles within all populations (< 3.61) and mean proportion of shared alleles within all analysed populations (< 0.55) indicates relatively low genetic variability, as expected for new populations funded by a small number of individuals. In STRUCTURE results with K = 2–4, Croatian and Czech populations cluster in the same genetic cluster, indicating joined origin. Among three populations from Spain, Almeria population shows as genetically distinct from others in results, while other Spanish populations diverge at K = 4. Maintenance of genetic diversity should be included in the management of populations to sustain their viability, specially for small Czech population with high proportion of shared alleles (0.85) and Croatian population that had the smallest estimated effective population size (Ne = 5.4).


1991 ◽  
Vol 87 (6) ◽  
Author(s):  
Massimo Gennarelli ◽  
Giuseppe Novelli ◽  
Ana Cobo ◽  
Montserrat Baiget ◽  
Bruno Dallapiccola

1979 ◽  
Vol 27 (6) ◽  
pp. 981 ◽  
Author(s):  
S Goodwin

Between 1972 and 1974, a study was made of parasitoids of P. xylostella naturally infesting four successive crops of cabbages which had not received any pesticide treatment. Parasitism fluctuated in each crop, averaging 49% during the study. The major parasitoid species were Diadegma cerophaga, Thyraeella collaris and Diadegma rapi, which averaged 93% of parasitism over the study period. Six minor primary parasitoid and one hyperparasite species were also recorded. Parasitoid activity was high during spring and summer, although extremely high temperatures during summer reduced numbers of both the host and its parasitoids. Drought conditions accentuated this. Parasitism in autumn depended upon the severity of this depletion and on the ensuing rate of recovery. The more important larval parasitoids were closely synchronized with host numbers, with a distinct lag during the winter period.


2005 ◽  
Vol 78 (2) ◽  
pp. 109-114 ◽  
Author(s):  
Aleksandar Stojanović ◽  
Čedomir Marković
Keyword(s):  

2018 ◽  
Vol 45 (6-8) ◽  
pp. 531-539
Author(s):  
Sara Varano ◽  
Luca Gaspari ◽  
Flavio De Angelis ◽  
Giuseppina Scano ◽  
Irene Contini ◽  
...  

2021 ◽  
Author(s):  
Carmen Denis ◽  
JORDI RIUDAVETS ◽  
OSCAR ALOMAR ◽  
NURIA AGUSTI ◽  
HELENA GONZALEZ-VALERO ◽  
...  

Our study aimed to assess the contribution of natural parasitism due to Necremnus tutae Ribes & Bernardo (Hymenoptera: Eulophidae) to the biological control of Tuta absoluta (Meyrick) (Lepidopera:Gelechiidae) in commercial plots where an IPM program based on the use of predatory mirid bugs was implemented. During the samplings, the presence of another parasitoid was detected and, therefore, a second part of our study intended to identify this species and to evaluate the importance of its natural populations in the biological control of the pest. Leaflets with T. absoluta galleries were collected during 2017-2020 from commercial tomato plots in the horticultural production area of Catalonia (Northeast Spain), including greenhouses, open fields, and roof covered tunnels that lack side walls. In the laboratory, T. absoluta larvae were classified as ectoparasitized, alive, or dead. Reared parasitoids from ectoparasitized larvae were mostly morphologically identified as Necremnus sp. with parasitism rates that peaked in summer months with values between 9 and 15%. Some of these ectoparasitized larvae also yielded another parasitoid identified as Dolichogenidea gelechiidivoris Marsh (Hymenoptera: Braconidae) by both morphological and molecular-DNA barcoding methods. In 2020, parasitism rates due to D. gelechiidivoris that increased with season up to 22%. Our work reports for the first time in Europe the presence of the neotropical species D. gelechiidivoris adding this biocontrol agent to the resident parasitoid complex of T. absoluta in Spain.


2013 ◽  
Vol 65 (2) ◽  
pp. 733-737
Author(s):  
M. Drekic ◽  
Lj. Mihajlovic ◽  
A. Lozan

The parasitoid complex of the ash weevil Stereonychus fraxini (De Geer) (Coleoptera, Curculionidae) from 20 localities in Serbia was studied. Forty-one samples of ash weevil larvae and cocoons were analyzed, and the presence of parasitoids was confirmed in 24 samples. Ten species of hymenopteran parasitoids (Hymenoptera Parasitica) were recorded. The two common eulophid wasps, Entedon zanara Walker and Entedon cionobius Thompson, were the most abundant. Parasitoids had an insignificant influence on the level of ash weevil population, because the level of infestation did not exceed 20% in 83% of the samples; however infestation above 40% was determined in 12.2% of the samples, indicating that in some cases parasitoids may significantly reduce the ash weevil population.


2016 ◽  
Vol 67 (6) ◽  
pp. 543-559 ◽  
Author(s):  
Camille Frau ◽  
Luc G. Bulot ◽  
William A.P. Wimbledon ◽  
Christina Ifrim

AbstractThis contribution focuses on the Perisphinctoidea ammonite taxa from the Upper Tithonian at Charens (Drôme, south-east France). Emphasis is laid on five genera that belong to the families Himalayitidae and Neocomitidae. We document the precise vertical range of the index-species Micracanthoceras microcanthum, and a comparative ontogenetic- biometric analysis sheds new light on its range of variation and dimorphism as compared to the bestknown Spanish populations. As herein understood, the lower boundary of the M. microcanthum Zone (base of the Upper Tithonian) is fixed at the FAD of its index species. The faunal assemblages and species distribution of the P. andreaei Zone are rather similar to those described at the key-section of Le Chouet as confirmed by the co-occurrence of the genera Protacanthodiscus, Boughdiriella and Pratumidiscus. New palaeontological evidence supports the view that the basal Neocomitidae Busnardoiceras busnardoi was derived from Protacanthodiscus andreaei in the upper part of the P. andreaei Zone.


2015 ◽  
Vol 45 (2) ◽  
pp. 357-366 ◽  
Author(s):  
C. N. Foba ◽  
D. Salifu ◽  
Z. O. Lagat ◽  
L. M. Gitonga ◽  
K. S. Akutse ◽  
...  

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