Imelda Martinez | Instituto de Ecología, A. C. (original) (raw)
Papers by Imelda Martinez
Phenology and reproductive cycles in Mexican aphodiine dung beetles (Coleoptera: Scarabaeidae: Aphodiinae: Aphodiini)
Annales de la Société entomologique de France (N.S.)
Spermatophore in Aphodiinae (Coleoptera: Scarabaeidae)
PROCEEDINGS-ENTOMOLOGICAL SOCIETY OF …, 2003
... Martinez and Alvarado 2001. Martinez et al. 2001, Mar-Eupariini. This classification is to be ... more ... Martinez and Alvarado 2001. Martinez et al. 2001, Mar-Eupariini. This classification is to be used in this paper. ... Landin 1961); in only one Aphodius spe-cies. Ap/mdius distiricms, has copulation been described in detail (Vitner 1995). ...
Reproductive Health Matters, 2005
In Latin America, where restrictive laws limit women's access to safe abortion services, misopros... more In Latin America, where restrictive laws limit women's access to safe abortion services, misoprostol is being used to induce abortions, often without correct information on dosage or regimens. This study in an unnamed Latin American country aimed to identify appropriate channels through which instructions on misoprostol use could be disseminated to women. In-depth interviews were carried out with physicians, pharmacy staff, women who had had safe abortions and women from the community, as well as focus group discussions with advocates of safe abortion. Participants considered physicians to be the most appropriate source of information and for ensuring confidentiality for both women and provider. Participants considered midwives, pharmacists and women's groups as appropriate referral points, but not providers of information. Legal restrictions and professional risk were the primary reasons why pharmacists rejected this role, though many are selling misoprostol. There was a general lack of information about misoprostol for medical abortion among both health professionals and women. Accurate information about misoprostol use for a wide range of gynaecologic and obstetric purposes, including induced abortion, could be incorporated into training and educational materials for physicians, midwives and other appropriate mid-level providers, as well as pharmacists. Without these alternative information channels, access to information would be severely restricted, especially in rural areas.
Revista de Biología Tropical, 2012
The State of Veracruz in Mexico is one of the main cattle producers, and uses several veterinary ... more The State of Veracruz in Mexico is one of the main cattle producers, and uses several veterinary products for disease and parasite control. For parasite control, ivermectin is one of the most frequently used substances. Nevertheless, even though previous research conducted in other countries has found that this product has negative effects on beneficial coprophagous fauna, no studies have described its effects on coprophagous insects at a local scale in Veracruz, Mexico. This study evaluated Euoniticellus intermedius survival, fecundity, fertility and preimaginal development under laboratory conditions when ivermectin was added to cattle dung at three different concentrations. The design included two controls (spiked dung), and the following product concentrations: 0.01, 1.0 and 100ppm, which were homogenized with wet cattle dung. 20 female-male E. intermedius couples between five and 15 days old were used and kept at 27°C, 70% RH, and 12h light for 10 days. The survival of all specimens, the fertility of 20 females and the gonadal maturity of 17 males were verified. The larval development in 162 pieces of brood-mass was examined, and a total of 974 larvae developed and reached adulthood. The highest ivermectin concentration was toxic at 1.0ppm dose, the survival of adults was reduced to almost the half, and at 100ppm, total mortality was observed. The effects on specimen reproductive systems showed that the ovary was not affected, that the testicle size increased, and that the fecundity and weight of brood-masses were reduced. Pre-imaginal development increased 0.5 times at 0.01ppm concentration, and the width of the cephalic capsule in third instar larvae diminished. The prolonging of development time may cause a phase lag in the field activity cycle, this lag may reduce the number of E. intermedius individuals and the efficiency of the environmental services that they provide.
Coordinated activity of the ovary, pars intercerebralis and corpus allatum during the prenesting and nesting cycles of Copris incertus Say (Coleoptera Scarabaeidae: …
The Coleopterists' Bulletin, 1997
... For Copris di-versus Waterhouse (Lopez-Guerrero 1984) and Oniticellus cinctus (Fabricius) (Lo... more ... For Copris di-versus Waterhouse (Lopez-Guerrero 1984) and Oniticellus cinctus (Fabricius) (Lopez-Guerrero 1995a), it has been noted only that the pars intercerebralis is involved in ovarian follicle development.These studies did not include analysis of the corpus allatum nor ...
Gonad behavior during peak reproduction period of Strombus gigas from Banco Chinchorro
Bulletin of marine …, 2003
... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS App... more ... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS Appeldoorn and B. Rodríguez, eds. Queen conch Strombus gigas: Biology, fisheries and mari-culture. ... Prosobranchs. Pages 145 in MK Wilburn, ed. The Mollusca. Vol. ...
Gonad behavior during peak reproduction period of Strombus gigas from Banco Chinchorro
Bulletin of marine …, 2003
... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS App... more ... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS Appeldoorn and B. Rodríguez, eds. Queen conch Strombus gigas: Biology, fisheries and mari-culture. ... Prosobranchs. Pages 145 in MK Wilburn, ed. The Mollusca. Vol. ...
Ciclo Reproductor de Busycon perversum (Mollusca:Gastropoda) del Golfo de México
RESUMEN El gasterópodo lix, Busycon perversum es un importante recurso pesquero en las costas de ... more RESUMEN El gasterópodo lix, Busycon perversum es un importante recurso pesquero en las costas de Campeche, México. Representa cerca del 40% de la captura comercial estatal de caracol estimada en 6,500 toneladas anuales de peso vivo. Para el manejo de la población de este caracol, se analizó el ciclo reproductivo de la especie. Veinte ejemplares adultos de B. perversum capturados en la localidad Seybaplaya, Campeche, fueron examinados mensualmente en 2009. La prevalencia de hembras con tallas mayores a las de los machos fue constante durante todo el periodo. La proporción de hembra:macho fue de 4:1. Los estadios de madurez en los machos fueron establecidos con base en la cantidad de tejido testicular, de la presencia de conductos espermáticos y de espermatogo-nias, espermátidas y espermatozoides. En las hembras, se utilizó como criterio la cantidad de tejido ovárico, de túbulos ovígeros, de ovogonias, ovocitos y óvulos. Se identificaron cinco estadios reproductivos: 1) Inmadurez o re...
Southwestern Entomologist
Resumen. Se estudiaron los escarabajos estercoleros en un pastizal tropical en Veracruz, México. ... more Resumen. Se estudiaron los escarabajos estercoleros en un pastizal tropical en Veracruz, México. Se exploró el reemplazo de especies a escala interanual y estacional. Los resultados indican que las poblaciones de algunas especies se encuentran en regresión, incluyendo las especies introducidas en 1980. Los cambios observados en la comunidad de escarabajos estercoleros pueden ser explicados en parte por el uso de agroquímicos y drogas desparasitantes que se comenzaron a emplear en el área a partir de 1980. Quizás el inadecuado uso de estas sustancias refleja el actual número de especies y la abundancia de escarabajos estercoleros. Se propone implementar medidas legales orientadas al uso más adecuado de medicamentos veterinarios y plaguicidas con el fin de conservar estos organismos clave involucrados en procesos ecológicos y en servicios ambientales importantes. La pérdida de esta entomofauna puede ocasionar severos estragos ambientales, incluyendo efectos sobre los humanos.
ACTA ZOOLÓGICA MEXICANA (N.S.)
Canthon imitator Brown 1946 se registra por primera vez en el Municipio de Papantla, Veracruz, Mé... more Canthon imitator Brown 1946 se registra por primera vez en el Municipio de Papantla, Veracruz, México. Este es el registro más meridional que se tiene de esta especie. Es un escarabajo estercolero rodador, diurno, abundante en el sitio de colecta de mayo a julio. Las hembras tienen sólo el ovario izquierdo con una ovariola. Ovipositan un solo huevo cada 4 a 5 días en una bola nido piriforme. Los machos tienen dos testículos, cada uno con seis folículos testiculares esféricos. El desarrollo hasta imago dura aproximadamente 30 días como en otras especies de Canthon estudiadas.
Acta Zoologica Mexicana, 2005
Hembras de Triatoma barberi fueron infectadas experimentalmente con Trypanosoma cruzi a partir de... more Hembras de Triatoma barberi fueron infectadas experimentalmente con Trypanosoma cruzi a partir del segundo estadio ninfal, con el fin de detectar posibles alteraciones en los ovarios y en las proteínas del vitelo del huevo. En las hembras infectadas y en las hembras testigo, se tomaron en cuenta los cambios morfológicos que se presentaron en los ovarios durante su maduración, así como los patrones electroforéticos de las proteínas del vitelo del huevo. La morfología de los ovarios de Triatoma barberi no fue afectada por la infección con Trypanosoma cruzi; los patrones de crecimiento de los ovarios hasta su madurez fueron los mismos en las hembras testigo y en las infectadas. Las proteínas del vitelo del huevo, en ambos grupos de hembras, no presentaron diferencias en los patrones electroforéticos.
Phenology, trophic preferences, and reproductive activity in some dung-inhabiting beetles (Coleoptera: Scarabaeoidea) in El Ilano de Las Flores, Oaxaca, Mexico
Proceedings of the Entomological Society of Washington, 2006
Morphology of the reproductive system and spermatophore of Litopenaeus vannamei, the Pacific white shrimp
Hidrobiologica, Dec 1, 2013
Fenologia y ciclos reproductivos en Ataenius apicalis Hinton y A. sculptor Harold (Coleoptera, Aphodiidae)
Bulletin De La Societe Entomologique De France, 2002
Dimorfismo sexual en larvas de Scarabaeoidea (Coleoptera)
Escarabeidos De Latinoamerica Estado Del Conocimiento 2003 Isbn 84 932807 4 7 Pags 15 18, 2003
The use of agricultural and livestock chemical products in the cattle-ranching area of Xico, central Veracruz, Mexico, and their possible environmental impact
Acta Zoologica Mexicana, Dec 1, 2009
Revista De Biologia Tropical, 2014
Variation of gonadal cycle of the american oyster, Crassostrea virginica (Ostreoida: Ostreidae) a... more Variation of gonadal cycle of the american oyster, Crassostrea virginica (Ostreoida: Ostreidae) as a function of height in Tamiahua Lagoon, Veracruz, Mexico. The American oyster, Crassostrea virginica is one of the most important fishery resources of the Gulf of Mexico, where it has been classified as "resource exploited at maximum". Since 1994 state authorities set a minimum extraction shell length of 70 mm (adult size); this was based on population studies alone. We compare the gonadal cycle of subadults oysters with adult organisms. From January to December 2011, 90 oysters were collected monthly in Tamiahua Lagoon, Veracruz and classified as subadults (50-69mm; 75% of sample) and adults (≥70mm). Histological gonad sections were classified in four categories: rest, gametogenesis, maturation and release of gametes. In subadults, the rest stage had two peaks (January 22% and June 13%), and gametogenesis between January and July (22-74%). Maturation was observed in July, August and September (40, 64 and 41% respectively) and release in October (66%) and November (45%). Correspondingly, adults were resting in January and June (17 and 13%), and January-July gametogenesis (56-88%), matured in August and September (64 and 42%) and released gametes in September and October (54 and 70%). The gametogenic cycle was similar in subadults and adults: the species breeds from sizes equal or smaller than 50 mm and this should be considered by authorities.
Phenology, reproductive cycles, and species composition of a dung beetle community (Coleoptera: Scabaeoidea) from a high mountain pasture system on the oriental Neovolcanic Axis (Veracruz, Mexico)
Proceedings Entomological Society of Washington, 2007
Phenology, reproductive cycles, and species composition of a dung beetle community (Coleoptera : ... more Phenology, reproductive cycles, and species composition of a dung beetle community (Coleoptera : Scarabaeoidea) from a high mountain pasture system on the Oriental Neovolcanic Axis (Veracruz, Ivlexico) Fj Cabrero-Sanudo, N Trotta-Moreu and l Martinez PROCEED/NGS ...
Distribution of Aphodiinae species (Coleoptera, Scarabaeoidea, Aphodiidae) in Mexico
Acta Zoologica Mexicana, Aug 1, 2010
Activité reproductrice et ses contrôles chez le mâle et la femelle de Canthon indigaceus chevrolati et C. Cyanellus cyanellus (Coléoptères, Scarabaeinae)
Http Www Theses Fr, 1991
Phenology and reproductive cycles in Mexican aphodiine dung beetles (Coleoptera: Scarabaeidae: Aphodiinae: Aphodiini)
Annales de la Société entomologique de France (N.S.)
Spermatophore in Aphodiinae (Coleoptera: Scarabaeidae)
PROCEEDINGS-ENTOMOLOGICAL SOCIETY OF …, 2003
... Martinez and Alvarado 2001. Martinez et al. 2001, Mar-Eupariini. This classification is to be ... more ... Martinez and Alvarado 2001. Martinez et al. 2001, Mar-Eupariini. This classification is to be used in this paper. ... Landin 1961); in only one Aphodius spe-cies. Ap/mdius distiricms, has copulation been described in detail (Vitner 1995). ...
Reproductive Health Matters, 2005
In Latin America, where restrictive laws limit women's access to safe abortion services, misopros... more In Latin America, where restrictive laws limit women's access to safe abortion services, misoprostol is being used to induce abortions, often without correct information on dosage or regimens. This study in an unnamed Latin American country aimed to identify appropriate channels through which instructions on misoprostol use could be disseminated to women. In-depth interviews were carried out with physicians, pharmacy staff, women who had had safe abortions and women from the community, as well as focus group discussions with advocates of safe abortion. Participants considered physicians to be the most appropriate source of information and for ensuring confidentiality for both women and provider. Participants considered midwives, pharmacists and women's groups as appropriate referral points, but not providers of information. Legal restrictions and professional risk were the primary reasons why pharmacists rejected this role, though many are selling misoprostol. There was a general lack of information about misoprostol for medical abortion among both health professionals and women. Accurate information about misoprostol use for a wide range of gynaecologic and obstetric purposes, including induced abortion, could be incorporated into training and educational materials for physicians, midwives and other appropriate mid-level providers, as well as pharmacists. Without these alternative information channels, access to information would be severely restricted, especially in rural areas.
Revista de Biología Tropical, 2012
The State of Veracruz in Mexico is one of the main cattle producers, and uses several veterinary ... more The State of Veracruz in Mexico is one of the main cattle producers, and uses several veterinary products for disease and parasite control. For parasite control, ivermectin is one of the most frequently used substances. Nevertheless, even though previous research conducted in other countries has found that this product has negative effects on beneficial coprophagous fauna, no studies have described its effects on coprophagous insects at a local scale in Veracruz, Mexico. This study evaluated Euoniticellus intermedius survival, fecundity, fertility and preimaginal development under laboratory conditions when ivermectin was added to cattle dung at three different concentrations. The design included two controls (spiked dung), and the following product concentrations: 0.01, 1.0 and 100ppm, which were homogenized with wet cattle dung. 20 female-male E. intermedius couples between five and 15 days old were used and kept at 27°C, 70% RH, and 12h light for 10 days. The survival of all specimens, the fertility of 20 females and the gonadal maturity of 17 males were verified. The larval development in 162 pieces of brood-mass was examined, and a total of 974 larvae developed and reached adulthood. The highest ivermectin concentration was toxic at 1.0ppm dose, the survival of adults was reduced to almost the half, and at 100ppm, total mortality was observed. The effects on specimen reproductive systems showed that the ovary was not affected, that the testicle size increased, and that the fecundity and weight of brood-masses were reduced. Pre-imaginal development increased 0.5 times at 0.01ppm concentration, and the width of the cephalic capsule in third instar larvae diminished. The prolonging of development time may cause a phase lag in the field activity cycle, this lag may reduce the number of E. intermedius individuals and the efficiency of the environmental services that they provide.
Coordinated activity of the ovary, pars intercerebralis and corpus allatum during the prenesting and nesting cycles of Copris incertus Say (Coleoptera Scarabaeidae: …
The Coleopterists' Bulletin, 1997
... For Copris di-versus Waterhouse (Lopez-Guerrero 1984) and Oniticellus cinctus (Fabricius) (Lo... more ... For Copris di-versus Waterhouse (Lopez-Guerrero 1984) and Oniticellus cinctus (Fabricius) (Lopez-Guerrero 1995a), it has been noted only that the pars intercerebralis is involved in ovarian follicle development.These studies did not include analysis of the corpus allatum nor ...
Gonad behavior during peak reproduction period of Strombus gigas from Banco Chinchorro
Bulletin of marine …, 2003
... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS App... more ... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS Appeldoorn and B. Rodríguez, eds. Queen conch Strombus gigas: Biology, fisheries and mari-culture. ... Prosobranchs. Pages 145 in MK Wilburn, ed. The Mollusca. Vol. ...
Gonad behavior during peak reproduction period of Strombus gigas from Banco Chinchorro
Bulletin of marine …, 2003
... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS App... more ... Creswell, RL 1994. An historical overview of queen conch mariculture. Pages 223230 in RS Appeldoorn and B. Rodríguez, eds. Queen conch Strombus gigas: Biology, fisheries and mari-culture. ... Prosobranchs. Pages 145 in MK Wilburn, ed. The Mollusca. Vol. ...
Ciclo Reproductor de Busycon perversum (Mollusca:Gastropoda) del Golfo de México
RESUMEN El gasterópodo lix, Busycon perversum es un importante recurso pesquero en las costas de ... more RESUMEN El gasterópodo lix, Busycon perversum es un importante recurso pesquero en las costas de Campeche, México. Representa cerca del 40% de la captura comercial estatal de caracol estimada en 6,500 toneladas anuales de peso vivo. Para el manejo de la población de este caracol, se analizó el ciclo reproductivo de la especie. Veinte ejemplares adultos de B. perversum capturados en la localidad Seybaplaya, Campeche, fueron examinados mensualmente en 2009. La prevalencia de hembras con tallas mayores a las de los machos fue constante durante todo el periodo. La proporción de hembra:macho fue de 4:1. Los estadios de madurez en los machos fueron establecidos con base en la cantidad de tejido testicular, de la presencia de conductos espermáticos y de espermatogo-nias, espermátidas y espermatozoides. En las hembras, se utilizó como criterio la cantidad de tejido ovárico, de túbulos ovígeros, de ovogonias, ovocitos y óvulos. Se identificaron cinco estadios reproductivos: 1) Inmadurez o re...
Southwestern Entomologist
Resumen. Se estudiaron los escarabajos estercoleros en un pastizal tropical en Veracruz, México. ... more Resumen. Se estudiaron los escarabajos estercoleros en un pastizal tropical en Veracruz, México. Se exploró el reemplazo de especies a escala interanual y estacional. Los resultados indican que las poblaciones de algunas especies se encuentran en regresión, incluyendo las especies introducidas en 1980. Los cambios observados en la comunidad de escarabajos estercoleros pueden ser explicados en parte por el uso de agroquímicos y drogas desparasitantes que se comenzaron a emplear en el área a partir de 1980. Quizás el inadecuado uso de estas sustancias refleja el actual número de especies y la abundancia de escarabajos estercoleros. Se propone implementar medidas legales orientadas al uso más adecuado de medicamentos veterinarios y plaguicidas con el fin de conservar estos organismos clave involucrados en procesos ecológicos y en servicios ambientales importantes. La pérdida de esta entomofauna puede ocasionar severos estragos ambientales, incluyendo efectos sobre los humanos.
ACTA ZOOLÓGICA MEXICANA (N.S.)
Canthon imitator Brown 1946 se registra por primera vez en el Municipio de Papantla, Veracruz, Mé... more Canthon imitator Brown 1946 se registra por primera vez en el Municipio de Papantla, Veracruz, México. Este es el registro más meridional que se tiene de esta especie. Es un escarabajo estercolero rodador, diurno, abundante en el sitio de colecta de mayo a julio. Las hembras tienen sólo el ovario izquierdo con una ovariola. Ovipositan un solo huevo cada 4 a 5 días en una bola nido piriforme. Los machos tienen dos testículos, cada uno con seis folículos testiculares esféricos. El desarrollo hasta imago dura aproximadamente 30 días como en otras especies de Canthon estudiadas.
Acta Zoologica Mexicana, 2005
Hembras de Triatoma barberi fueron infectadas experimentalmente con Trypanosoma cruzi a partir de... more Hembras de Triatoma barberi fueron infectadas experimentalmente con Trypanosoma cruzi a partir del segundo estadio ninfal, con el fin de detectar posibles alteraciones en los ovarios y en las proteínas del vitelo del huevo. En las hembras infectadas y en las hembras testigo, se tomaron en cuenta los cambios morfológicos que se presentaron en los ovarios durante su maduración, así como los patrones electroforéticos de las proteínas del vitelo del huevo. La morfología de los ovarios de Triatoma barberi no fue afectada por la infección con Trypanosoma cruzi; los patrones de crecimiento de los ovarios hasta su madurez fueron los mismos en las hembras testigo y en las infectadas. Las proteínas del vitelo del huevo, en ambos grupos de hembras, no presentaron diferencias en los patrones electroforéticos.
Phenology, trophic preferences, and reproductive activity in some dung-inhabiting beetles (Coleoptera: Scarabaeoidea) in El Ilano de Las Flores, Oaxaca, Mexico
Proceedings of the Entomological Society of Washington, 2006
Morphology of the reproductive system and spermatophore of Litopenaeus vannamei, the Pacific white shrimp
Hidrobiologica, Dec 1, 2013
Fenologia y ciclos reproductivos en Ataenius apicalis Hinton y A. sculptor Harold (Coleoptera, Aphodiidae)
Bulletin De La Societe Entomologique De France, 2002
Dimorfismo sexual en larvas de Scarabaeoidea (Coleoptera)
Escarabeidos De Latinoamerica Estado Del Conocimiento 2003 Isbn 84 932807 4 7 Pags 15 18, 2003
The use of agricultural and livestock chemical products in the cattle-ranching area of Xico, central Veracruz, Mexico, and their possible environmental impact
Acta Zoologica Mexicana, Dec 1, 2009
Revista De Biologia Tropical, 2014
Variation of gonadal cycle of the american oyster, Crassostrea virginica (Ostreoida: Ostreidae) a... more Variation of gonadal cycle of the american oyster, Crassostrea virginica (Ostreoida: Ostreidae) as a function of height in Tamiahua Lagoon, Veracruz, Mexico. The American oyster, Crassostrea virginica is one of the most important fishery resources of the Gulf of Mexico, where it has been classified as "resource exploited at maximum". Since 1994 state authorities set a minimum extraction shell length of 70 mm (adult size); this was based on population studies alone. We compare the gonadal cycle of subadults oysters with adult organisms. From January to December 2011, 90 oysters were collected monthly in Tamiahua Lagoon, Veracruz and classified as subadults (50-69mm; 75% of sample) and adults (≥70mm). Histological gonad sections were classified in four categories: rest, gametogenesis, maturation and release of gametes. In subadults, the rest stage had two peaks (January 22% and June 13%), and gametogenesis between January and July (22-74%). Maturation was observed in July, August and September (40, 64 and 41% respectively) and release in October (66%) and November (45%). Correspondingly, adults were resting in January and June (17 and 13%), and January-July gametogenesis (56-88%), matured in August and September (64 and 42%) and released gametes in September and October (54 and 70%). The gametogenic cycle was similar in subadults and adults: the species breeds from sizes equal or smaller than 50 mm and this should be considered by authorities.
Phenology, reproductive cycles, and species composition of a dung beetle community (Coleoptera: Scabaeoidea) from a high mountain pasture system on the oriental Neovolcanic Axis (Veracruz, Mexico)
Proceedings Entomological Society of Washington, 2007
Phenology, reproductive cycles, and species composition of a dung beetle community (Coleoptera : ... more Phenology, reproductive cycles, and species composition of a dung beetle community (Coleoptera : Scarabaeoidea) from a high mountain pasture system on the Oriental Neovolcanic Axis (Veracruz, Ivlexico) Fj Cabrero-Sanudo, N Trotta-Moreu and l Martinez PROCEED/NGS ...
Distribution of Aphodiinae species (Coleoptera, Scarabaeoidea, Aphodiidae) in Mexico
Acta Zoologica Mexicana, Aug 1, 2010
Activité reproductrice et ses contrôles chez le mâle et la femelle de Canthon indigaceus chevrolati et C. Cyanellus cyanellus (Coléoptères, Scarabaeinae)
Http Www Theses Fr, 1991