The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform
Jaime Gonzalez-cabrera - One of the best experts on this subject based on the ideXlab platform.
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Quality Control and Captive Rearing Genetics of the Biological Control Agent Trichogramma pretiosum
2013Co-Authors: Jaime Gonzalez-cabreraAbstract:In these studies, we determined the quality of Trichogramma parasitoids reared in several Mexican insectaries, evaluated the clonal variability found in Trichogramma pretiosum populations where the infection has gone to fixation, and determined the potential for genetic changes taking place during mass rearing of Trichogramma spp. The results showed that there is substantial potential for adaptation to mass rearing conditions when mass reared populations are initiated with genetically variable populations. In addition, we determined that inbreeding depression is possible even in Species such as Trichogramma pretiosum where their sex determination and normal sibmating mating system would predict a minimal effect of inbreeding. With respect to the quality of mass reared Trichogramma , we found discrepancy between the reported and the reared Specie, Presence of unnoticed Species replacement, and we found that the reared Species barely met the minimum standards suggested by the international organization for biological control/ European community. From the PI-Wolbachia infected population, we found a surprisingly large amount of variability among the different clonal lines when life history measurements were made. In this dissertation, we also outlined several guidelines for insectaries regarding how to maintain high field quality of the natural enemies they produce. Finally, our findings of the high diversity of clones in entirely asexual populations may result in a more rational future use of asexual wasps in biological control.
R. Natcheva - One of the best experts on this subject based on the ideXlab platform.
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Conservation Value and Degree of Threat of Natural Habitats—An Attempt for Evaluation Matrix
Biotechnology & Biotechnological Equipment, 2014Co-Authors: D. Peev, M. Delcheva, R. NatchevaAbstract:ABSTRACTThe main problem of developing an evaluation matrix is the transformation of “quality” parameters into “quantity” parameters. Based on our previous experience an attempt for elaboration of evaluation matrix for natural habitats was made. A four level scale of 25, 50, 75 to 100 relative units gives the possibility to measure the conservation value and degree of threat. Several types of parameters were used for evaluation: spatial, temporal and functional. The occurrence of Species with conservation value in the habitats and Specie' Presence in national and international legislation was taken into account. The most significant condition for the effective use of the matrix is the sufficient knowledge about the habitats and threats selected for evaluation. Corresponding with the IUCN categories, four degrees of the Index of Threat were accepted: CRh—Critically Endangered; ENh—Endangered; VUh—Vulnerable; NTh—Near Threatened, where the letter “h” indicates “habitat”. Four degrees of the Index of Conserv...
D. Peev - One of the best experts on this subject based on the ideXlab platform.
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Conservation Value and Degree of Threat of Natural Habitats—An Attempt for Evaluation Matrix
Biotechnology & Biotechnological Equipment, 2014Co-Authors: D. Peev, M. Delcheva, R. NatchevaAbstract:ABSTRACTThe main problem of developing an evaluation matrix is the transformation of “quality” parameters into “quantity” parameters. Based on our previous experience an attempt for elaboration of evaluation matrix for natural habitats was made. A four level scale of 25, 50, 75 to 100 relative units gives the possibility to measure the conservation value and degree of threat. Several types of parameters were used for evaluation: spatial, temporal and functional. The occurrence of Species with conservation value in the habitats and Specie' Presence in national and international legislation was taken into account. The most significant condition for the effective use of the matrix is the sufficient knowledge about the habitats and threats selected for evaluation. Corresponding with the IUCN categories, four degrees of the Index of Threat were accepted: CRh—Critically Endangered; ENh—Endangered; VUh—Vulnerable; NTh—Near Threatened, where the letter “h” indicates “habitat”. Four degrees of the Index of Conserv...
M. Delcheva - One of the best experts on this subject based on the ideXlab platform.
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Conservation Value and Degree of Threat of Natural Habitats—An Attempt for Evaluation Matrix
Biotechnology & Biotechnological Equipment, 2014Co-Authors: D. Peev, M. Delcheva, R. NatchevaAbstract:ABSTRACTThe main problem of developing an evaluation matrix is the transformation of “quality” parameters into “quantity” parameters. Based on our previous experience an attempt for elaboration of evaluation matrix for natural habitats was made. A four level scale of 25, 50, 75 to 100 relative units gives the possibility to measure the conservation value and degree of threat. Several types of parameters were used for evaluation: spatial, temporal and functional. The occurrence of Species with conservation value in the habitats and Specie' Presence in national and international legislation was taken into account. The most significant condition for the effective use of the matrix is the sufficient knowledge about the habitats and threats selected for evaluation. Corresponding with the IUCN categories, four degrees of the Index of Threat were accepted: CRh—Critically Endangered; ENh—Endangered; VUh—Vulnerable; NTh—Near Threatened, where the letter “h” indicates “habitat”. Four degrees of the Index of Conserv...