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BACKGROUND AND OBJECTIVES: The objective is to describe the demographic, clinical, functional characteristics and outcomes of older adult patients hospitalized in the acute unit of the San Ignacio University Hospital (HUSI). METHODS: Descriptive, cross-sectional observational study, based on the review of the medical records of patients hospitalized in the Geriatrics Unit of the HUSI during the period 2019-2021. VARIABLES: Demographics, comorbidities, baseline situation, main cause of entry and outcomes. The diagnosis of geriatric syndromes was made through the Barthel index, the Lawton and Brody scale, FRAIL scale, mini nutritional assessment short form and Confusion Assessment Method criteria. RESULTS: A total of 4601 patients were analyzed, whose average age was 83years (56.2% women). 72.4% had some degree of dependency for basic activities of daily living, 90.8% had some degree of dependency for instrumental activities of daily living, 32.2% had malnutrition, 15. 7% falls, 9.9% oropharyngeal dysphagia, 32.2% frailty, 28.1% delirium, 54.1% previous dementia. The main comorbidities presented were arterial hypertension, chronic obstructive pulmonary disease and diabetes. 2.9% had some complication during their hospitalization, 10.8% died, and the hospital stay was 5days. CONCLUSION: Older adult patients admitted to the acute unit of the HUSI have a high frequency of dependency, dementia and nutritional disturbances.
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BACKGROUND: Fear of falling (FoF) is a condition associated with falls, multi-morbidity, and functional impairment. To date it remains unknow which clinical, somatic, socio-demographic, behavioral, and emotional factors are associated with FoF and how these factors interact in people with Alzheimer's disease (AD) and behavioral variant frontotemporal dementia (bvFTD). OBJECTIVE: Identify the association of FoF with clinical, socio-demographic, and neuropsychiatric factors in patients with AD and bvFTD. METHODS: We evaluated 98 participants, 58 with AD and 40 with bvFTD at mild or moderate stages and assess FoF using the Falls Efficacy Scale-International. Additionally, we analyzed cognitive, physical performance variables, functional impairment, and affective and behavioral symptoms associated with FoF using standardized scales and a regression model analysis. RESULTS: The prevalence of FoF in AD and bvFTD was 51% and 40%, respectively. In the AD group, physical performance [F (3, 53)â=â4.318, pâ=â0.009], the behavioral symptoms model [F (19, 38)â=â3.314, pâ=â0.001], and the anxiety model [F (1, 56)â=â13.4, p≤0.01] showed statistically significant values. In addition, the presence of hallucinations assessed with the Neuropsychiatric Inventory and social behavior assessed with the Mild Behavioral Impairment Checklist were significant. In contrast, in the bvFTD group, a homologous group of models was evaluated but we did not find any significant results. CONCLUSION: FoF in people with AD was related to physical performance, neuropsychiatric symptoms such as apathy and hallucinations, and affective symptoms such as anxiety. However, this pattern was not seen in the bvFTD group, and therefore further studies are required.
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Doença de Alzheimer , Demência Frontotemporal , Humanos , Acidentes por Quedas/prevenção & controle , Medo , Demência Frontotemporal/psicologia , Doença de Alzheimer/complicações , Doença de Alzheimer/epidemiologia , Doença de Alzheimer/diagnóstico , Sintomas Comportamentais , AlucinaçõesRESUMO
In this preclinical protocol, an adjunct method is used in an attempt to overcome the limitations of conventional therapeutic approaches applied to bone repair of large bone defects filled with scaffolds. Thus, we evaluate the effects of photobiomodulation therapy (PBMT) on the bone repair process on defects filled with demineralized bovine bone (B) and fibrin sealant (T). The groups were BC (blood clot), BT (B + T), BCP (BC + PBMT), and BTP (B + T + PBMT). Microtomographically, BC and BCP presented a hypodense cavity with hyperdense regions adjacent to the border of the wound, with a slight increase at 42 days. BT and BTP presented discrete hyperdensing areas at the border and around the B particles. Quantitatively, BCP and BTP (16.96 ± 4.38; 17.37 ± 4.38) showed higher mean bone density volume in relation to BC and BT (14.42 ± 3.66; 13.44 ± 3.88). Histologically, BC and BCP presented deposition of immature bone at the periphery and at 42 days new bone tissue became lamellar with organized total collagen fibers. BT and BTP showed inflammatory infiltrate along the particles, but at 42 days, it was resolved, mainly in BTP. In the birefringence analysis, BT and BTP, the percentage of red birefringence increased (9.14% to 20.98% and 7.21% to 27.57%, respectively), but green birefringence was similar in relation to 14 days (3.3% to 3.5% and 3.5% to 4.2%, respectively). The number of osteocytes in the neoformed bone matrix proportionally reduced in all evaluated groups. Immunostaining of bone morphogenetic protein (BMP2/4), osteocalcin (OCN), and vascular endothelial growth factor (VEGF) were higher in BCP and BTP when compared to the BC and BT groups (p < 0.05). An increased number of TRAP positive cells (tartrate resistant acid phosphatase) was observed in BT and BTP. We conclude that PBMT positively influenced the repair of bone defects filled with B and T.
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BACKGROUND: The neuropsychiatric symptoms (NPS) in patients with neurocognitive disorders (NCD) increases the risk of exhibiting significant cognitive and functional decline. However, to the best of our knowledge, few studies have evaluated to what extent the presence of chronic and early NPS impacts cognition and functionality in patients with minor or major stages of NCD. OBJECTIVE: We aimed to assess the interplay between early and chronic NPS and cognitive and functional presentation of patients with mild and major forms of NCD. METHODS: We used two NPS tools tracking early and late NPS and assessed to what extent they determine cognitive and functional outcomes in patients with mild and major forms of NCD. RESULTS: We found an inverse relationship between the presence of NPS, as measured by the Neuropsychiatric Inventory and Mild Behavioral Impairment Checklist (MBI-C), and cognitive and functional variables in major forms of NCD. In contrast, the minor stage of NCD was associated with increased MBI-C scores. CONCLUSION: Our results revealed that NPS are associated with cognitive and functional outcomes in mild and chronic forms of NCD. Crucially our results suggest that NPS could be considered as a pathological marker of the clinical course of dementia. Additionally, our study calls to study early and late forms of NPS as both impact cognition and functionality of NCD.
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Lista de Checagem , Disfunção Cognitiva/complicações , Transtornos Neurocognitivos/diagnóstico , Testes Neuropsicológicos/estatística & dados numéricos , Avaliação de Sintomas , Idoso , Demência/diagnóstico , Feminino , Humanos , MasculinoRESUMO
INTRODUCTION: The main aim of this study is to determine the prevalence of behavioural disturbances (BD) in a group of patients with diagnosis of neurocognitive disorders assessed by a memory clinic in a referral assessment centre in Bogotá, Colombia, in 2015. MATERIAL AND METHODS: This is an observational, retrospective descriptive study of 507 patients with a diagnosis of neurocognitive disorder (according to DSM-5 criteria) evaluated in a referral centre in Bogotá, Colombia, in 2015. RESULTS: Among the group of patients assessed, analyses reveal mean age for minor neurocognitive disorders of 71.04 years, and 75.32 years for major neurocognitive disorder (P <0.001). A total of 62.72% of the sample were female. The most prevalent aetiology of the neurocognitive disorders was Alzheimer's disease, followed by behavioural variant frontotemporal dementia and neurocognitive disorders due to multiple aetiologies. BD occur more frequently in neurocognitive disorder due to behavioural variant frontotemporal dementia (100%), Alzheimer's disease (77.29%) and vascular disease (76.19%). The most prevalent BD in the group assessed were apathy (50.75%), irritability (48.45%), aggression (16.6%), and emotional lability (14.76%). CONCLUSIONS: BD are highly prevalent in patients with diagnosis of major neurocognitive disorder. BD are more prevalent in behavioural variant frontotemporal dementia than any other group. Apathy, irritability, emotional lability and aggression are the BD that occur with greater prevalence in our sample. We discuss the importance of BD in the clinical progression of neurocognitive disorders.
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Doença de Alzheimer/fisiopatologia , Demência Frontotemporal/fisiopatologia , Transtornos Mentais/epidemiologia , Transtornos Neurocognitivos/fisiopatologia , Idoso , Idoso de 80 Anos ou mais , Doença de Alzheimer/psicologia , Colômbia , Progressão da Doença , Feminino , Demência Frontotemporal/psicologia , Humanos , Masculino , Transtornos Neurocognitivos/complicações , Estudos RetrospectivosRESUMO
RESUMEN Introducción: El objetivo de este estudio es determinar la frecuencia de alteraciones conductuales (AC) en un grupo de pacientes con diagnóstico de trastorno neurocognoscitivo (TN) valorado por clínica de memoria en un centro de evaluación en Bogotá, Colombia, durante el ano 2015. Material y métodos: Estudio observacional descriptivo y de corte retrospectivo de 507 pacientes con diagnóstico de trastorno neurocognoscitivo (según criterios del DSM-5), valorados en un centro de referencia en Bogotá en 2015. Resultados: La media de edad de los sujetos con trastorno neurocognoscitivo leve en el momento del diagnóstico era 71,04 arios y la de aquellos con trastorno neurocognoscitivo mayor, 75,32 años (p < 0,001). El 62,72% de la muestra son mujeres. La etiología más frecuente del trastorno neurocognoscitivo fue la enfermedad de Alzheimer probable, seguida por la degeneración lobar frontotemporal, variante conductual, y el trastorno neurocognoscitivo debido a múltiples etiologías. Las AC se presentan con mayor frecuencia en TN debido a degeneración frontotemporal variante conductual (100%), enfermedad de Alzheimer (77,29%) y vascular (76,19%). Las AC más prevalentes en el grupo evaluado fueron la apatía (50,75%), la irritabilidad (48,45%), la agresividad (16,6%) y la labilidad emocional (14,76%). Conclusiones: Las AC son prevalentes en pacientes con diagnóstico de trastorno neurocognoscitivo mayor. Según la etiología del trastorno neurocognoscitivo mayor, las AC son más prevalentes en la degeneración frontotemporal variante conductual. Apatía, irritabilidad, labilidad emocional y agresividad son las AC más comunes en toda la muestra.
ABSTRACT Introduction: The main aim of this study is to determine the prevalence of behavioural disturbances (BD) in a group of patients with diagnosis of neurocognitive disorders assessed by a memory clinic in a referral assessment centre in Bogotá, Colombia, in 2015. Material and methods: This is an observational, retrospective descriptive study of 507 patients with a diagnosis of neurocognitive disorder (according to DSM-5 criteria) evaluated in a referral centre in Bogotá, Colombia, in 2015. Results: Among the group of patients assessed, analyses reveal mean age for minor neurocognitive disorders of 71.04 years, and 75.32 years for major neurocognitive disorder (P < 0.001). A total of 62.72% of the sample were female. The most prevalent aetiology of the neurocognitive disorders was Alzheimer's disease, followed by behavioural variant fronto-temporal dementia and neurocognitive disorders due to multiple aetiologies. BD occur more frequently in neurocognitive disorder due to behavioural variant frontotemporal dementia (100%), Alzheimer's disease (77.29%) and vascular disease (76.19%). The most prevalent BD in the group assessed were apathy (50.75%), irritability (48.45%), aggression (16.6%), and emotional lability (14.76%). Conclusions: BD are highly prevalent in patients with diagnosis of major neurocognitive disorder. BD are more prevalent in behavioural variant frontotemporal dementia than any other group. Apathy, irritability, emotional lability and aggression are the BD that occur with greater prevalence in our sample. We discuss the importance of BD in the clinical progression of neurocognitive disorders.
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Humanos , Masculino , Feminino , Idoso , Comportamento , Transtornos Neurocognitivos , Doenças Vasculares , Prevalência , Colômbia , Agressão , Degeneração Lobar Frontotemporal , Doença de AlzheimerRESUMO
El conocimiento no avanza lineal sino discontinuamente, no por aposiciones sino por rupturas. Corresponde a nuevos paradigmas el destruir los anteriores para ser a su vez destruidos; pero existe una etapa previa a este proceso: el matizar algunos de los elementos del paradigma original. La idea que la explicación del proceso salud-enfermedad reside última ratio en la sociedad, representó un nuevo paradigma que generó explicaciones secundarias sobre el concepto de salud, y acerca de la génesis, la evolución y las posibilidades de control de las enfermedades. Este paradigma reemplazó visiones biologistas, idealistas o inexistentes acerca del fenómeno de la enfermedad colectiva, que provenían de la edad de oro de la medicina clásica, en épocas en que la epidemiología parecía ser un apéndice de la microbiología y la salud pública una hija menor de la Harvard Business...(AU)
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Humanos , Indicadores de Morbimortalidade , Mortalidade , ArgentinaRESUMO
BACKGROUND: Photobiomodulation therapy (PBMT) using low-level laser influences the release of several growth factors involved in the formation of epithelial cells, fibroblasts, collagen and vascular proliferation, besides accelerating the synthesis of bone matrix due to the increased vascularization and lower inflammatory response, with significant increase of osteocytes in the irradiated bone. Considering its properties, beneficial effects and clinical relevance, the aim of this review was to analyze the scientific literature regarding the use of PBMT in the process of bone defect repair. METHODS: Electronic search was carried out in PubMed/MEDLINEâ and Web of Science databases with combination of the descriptors low-level laser therapy AND bone repair, considering the period of publication until the year 2018. RESULTS: The literature search identified 254 references in PubMed/MEDLINE and 204 in Web of Science, of which 33 and 4 were selected, respectively, in accordance with the eligibility requirements. The analysis of researches showed articles using PBMT in several places of experimentation in the subjects, different types of associated biomaterials, stimulatory effects on cell proliferation, besides variations in the parameters of use of laser therapy, mainly in relation to the wavelength and density of energy. Only four articles reported that the laser did not improve the osteogenic properties of a biomaterial. CONCLUSIONS: Many studies have shown that PBMT has positive photobiostimulatory effects on bone regeneration, accelerating its process regardless of parameters and the use of biomaterials. However, standardization of its use is still imperfect and should be better studied to allow correct application concerning the utilization protocols.
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Regeneração Óssea/efeitos da radiação , Proliferação de Células/efeitos da radiação , Consolidação da Fratura/efeitos da radiação , Fraturas Ósseas/radioterapia , Terapia com Luz de Baixa Intensidade , Osteogênese/efeitos da radiação , Regeneração Óssea/fisiologia , Colágeno/metabolismo , Fibroblastos/metabolismo , Consolidação da Fratura/fisiologia , Fraturas Ósseas/fisiopatologia , Humanos , Terapia com Luz de Baixa Intensidade/métodos , Osteogênese/fisiologiaRESUMO
Background: To study the extent to which neuropsychiatric symptoms (NPS) influence the cognitive and functional decline in frontotemporal degeneration (FTD) and Alzheimer's disease (AD). Methods: We assessed the progression of NPS and their influence on cognitive and functional progression in a group of FTD (n = 36) and AD patients (n = 47) at two different stages of the disease (2.5 years). A standardized scale was used to assess NPS-the Columbia University Scale for Psychopathology in Alzheimer's Disease (CUSPAD)-which tracks different symptoms including depression, psychotic symptoms, as well as sleep and conduct problems. In addition, in a subsample of patients (AD n = 14 and FTD n = 14), we analyzed another group of NPS by using the Neuropsychiatric Inventory (NPI). Cognitive declines were tracked by using the Montreal Cognitive Assessment (MoCA) and the Mini-Mental State Examination (MMSE), while functionality was tracked by using the Lawton scale and the Barthel Index. Results: The presence of NPS impacts cognitive and functional decline in both groups of patients 2.5 years after disease onset. However, we observed a dissociable profile of the affectation of NPS in each group. In the AD group, results indicate that the progression of depressive symptoms and sleep problems predict cognitive and functional decline. In contrast, the progression of a mixed group of NPS, including conduct problems and delusions, predicts cognitive and functional decline in FTD. Conclusion: The presence of NPS has a critical impact on the prediction of cognitive decline in FTD and AD patients after 2.5 years of disease progression. Our results demonstrate the importance of assessing different types of NPS in neurodegenerative disorders which, in turn, predict disease progression. Future studies should assess the role of NPS in predicting different neurocognitive pathways and in neurodegeneration.
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Los aniversarios estimulan la tentación de hacer balances, y esta tentación se vuelve máxima ante el próximo 500 aniversario de la invasión europea de América. Es posible que este balance, que se está llevando a cabo en todo el mundo, arroje conclusiones diferentes al que se hizo hace 100 años. Hasta no hace mucho, las evaluaciones hegemónicas de la invasión eran positivas. Los vencidos no elevaban su voz, y polémicas del tipo de la "leyenda negra" con la que cierta historiografía, principalmente anglosajona, impugnaba la acción de los españoles -los primeros invasores- parecía no ser más que una reyerta entre vencedores. Para ventaja de los que estamos reflexionando sobre el 5o Centenario, en las últimas décadas han aparecido muchos trabajos de investigación que han permitido resignificar la información atesorada por los cronistas, y han podido obtener mucha información nueva. Historiadores, arqueólogos, demógrafos, ecólogos, agrónomos y epidemiólogos modernos han podido generar materiales sobre los que se han abalanzado analizadores críticos de toda índole; porque esta información nueva resalta la tragedia que representó para América (y secundariamente para África) la colisión con Europa, que comenzó con el arribo a Guanahaní de una nao y dos carabelas en 1492. En lo que sigue, nos limitaremos a hacer una reseña del impacto epidemiológico...(AU)
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Humanos , Medicina Social , América/etnologia , EpidemiologiaRESUMO
O ICD Register da Medtronic foi introduzido na América Latina com a finalidade de coletar dados relacionados à indicação de implantes de CDI para prevenção primária e secundária de morte súbita e ao acompanhamento de pacientes originários de Porto Rico, Caribe. México e América do Sul. Além dessa ampla variedade geográfica, também foram incluídos detalhes referentes aos cuidados de saúde recebidos como parte do tratamento. O presente estudo apresenta as características de desfecho de 910 portadores de cardiopatias tratados para prevenção primária, em comparação com aqueles nos quais o implante destinou-se à prevenção secundária.
The ICD Register was introduced to Latin America to collect data related to implant indication of ICD for the prevention of primary and secondary deaths and for the follow-up of patients from Puerto Rico, the Caribbean, Mexico and South America. In addition to this vast geographic variety, information related to the health care as part of the treatment has also been included. This study shows the characteristics of the outcome of 910 cardiopathy patients treated for primary prevention, incomparison to those whose implants were meant for secondary prevention.
El ICD Register de Medtronic fue introducido en América Latina a fin de recoger datos relacionados a la indicación de implantes de CDI para la prevención primaria y secundaria de muerte súbita y a la remisión de pacientes provenientes de Puerto Rico, Caribe, México y Sudamérica. Ademásde esa amplia variedad geográfica, también se incluyeron detalles referentes a los cuidados de saludrecibidos como parte del tratamiento. El presente estudio presenta las características de solución de 910 portadores de cardiopatías tratados para la prevención primaria, en comparación con aquellos cuyo implante se destinó a la prevención secundaria.
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Humanos , Adulto , Idoso , Cardiopatias/terapia , Morte Súbita , Desfibriladores Implantáveis/normas , Estudos Multicêntricos como Assunto/classificação , Prevenção Primária/normas , Prevenção Secundária/normasRESUMO
This study addressed the environmental control of an IVF laboratory and the potential repercussions that the presence of certain physical, chemical and biological agents could have on workers' health or on the tasks they carried out. The design of the laboratory and its facilities contributed to an improvement in work quality and minimised the environmental-related risks. The preventive measures adopted had an influence on the carried out actions.
Este estudo dirige-se ao controle ambiental de um laboratório "in vitro fertilization (IVF)" e das repercussões potenciais que a presença de determinados agentes físicos, químicos e biológicos possa ter na saúde nos trabalhadores' ou nas tarefas que se realizem. O projeto do laboratório e de suas facilidades contribui a uma melhoria na qualidade do trabalho e minimiza riscos ambiental-relacionados. As medidas preventivas adotadas têm uma influência nas ações realizadas.
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Introducción: La patología del tracto urinario superior supone un reto diagnóstico para el urólogo. La aparición de nuevo hardware y software de adquisición y procesamiento de imágenes de tomografía computarizada (TC) ha hecho posible el desarrollo de técnicas como la que presentamos en este estudio. Material y métodos: Entre enero de 2005 y agosto de 2007 hemos incluido 57 urografías por tomografía computarizada (Uro-TC) realizadas en nuestro centro a pacientes con enfermedades del tracto urinario superior. Recogemos las indicaciones, los diagnósticos y comparamos los valores de validez interna y externa de la prueba con los de otras exploraciones radiológicas. Resultados: Realizamos un total de 57 exploraciones a 56 pacientes con edades entre los 38 y los 84 años en las que diagnosticamos 21 litiasis, 8 neoformaciones uroteliales, 2 pélvicas, 3 ureterales y 3 vesicales. En 6 pacientes con ureterohidronefrosis de etiología incierta en otras exploraciones conseguimos dilucidar la causa de la obstrucción. Diagnosticamos 2 litiasis durante el seguimiento de pacientes portadores de derivaciones urinarias, así como 5 casos de estenosis benigna. En 11 pacientes se diagnosticaron diferentes malformaciones congénitas. Los valores de validez interna de la prueba fueron superiores a los de las pruebas de imagen usadas convencionalmente para el diagnóstico de trastornos del tracto urinario superior. Conclusiones: La Uro-TC es una prueba eficiente, que está al alcance de la mayoría de centros en los que se disponga de la tecnología necesaria. Permite en casos seleccionados optimizar recursos sanitarios y agilizar el diagnóstico de la enfermedad urológica.
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Humanos , Masculino , Adulto , Feminino , Pessoa de Meia-Idade , Ultrassonografia , Endoscopia/estatística & dados numéricos , Endoscopia/instrumentação , Endoscopia , Doenças Urológicas/diagnósticoRESUMO
Introducción: Ante el incremento de la amenaza o exposición real a eventos generadores de gran tensión emocional -sean estos naturales o provocados por el ser humano-, resulta muy importante contar con intervenciones efectivas para el manejo de las situaciones de crisis que se desencadenan luego de estos eventos y para la prevención de los trastornos de estrés postraumático resultantes, en especial si estas intervenciones son sencillas y poco costosas. Objetivo: Revisar los estudios más recientes sobre la técnica del debriefing. Método: Revisión de la literatura. Desarrollo: El debriefing es una intervención breve que promueve la catarsis, y sobre la que existen debates con respecto a sus resultados. En la revisión de la literatura se encuentran datos contradictorios, pues algunos autores plantean beneficios y otros la califican de inocua e incluso peligrosa. Lo más llamativo -y que podría explicar parcialmente estas inconsistencias- es que se han dado variaciones en la modalidad original, aunque se mantiene el mismo nombre. Conclusión: Se recomienda realizar más estudios, pero definir con precisión cuál es la versión que se va a evaluar.
Introduction: The risk or actual exposure to an emotionally challenging event can lead to post-traumatic stress disorder. The increase in such situations, whether caused by natural phenomena or by human beings, creates a need for effective preventive or management strategies. Debriefing is a simple and low-cost intervention. Objective: To review the debriefing technique. Method: Literature review. Development: Debriefing is usually brief and based on catharsis, but with debatable results. A review of the available literature shows opposite points of view. Some authors praise its benefi ts, while others classify it as plain and risky. One possible explanation to these confusing results is the variations in the application of the original technique. Conclusion: Studies detailing which of the variations is employed are required to achieve reliable results.
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Distribution and abundance of Katsuwonus pelamis larvae (Perciformes: Scombridae) in the Gulf of Mexico, 1982-1992. The epipelagic fish known as skipjack (Katsuwonus pelamis) is considered inside the "little tuna" group. The species is distributed in tropical and subtropical waters worldwide. Despite its fisheries importance in Mexico, there is little knowledge about the species in the region. The information from 18 oceanographic cruises inside the Mexican exclusive economic zone in the Gulf of Mexico and Caribbean Sea, was analyzed for the period 1982 to 1992. Plankton was collected in a paired 60 cm mouth bongo net sampler with 0.333 mm mesh nets in oblique tows. The maximum abundance was in spring and summer; 1986 had the largest population (4 881.8544 x 10(9) larvae) and 1983 the lowest density (566.3748 x 10(9)). The skipjack has suitable conditions for reproduction in this area, and the southwestern region is the most productive. The spawning was greater in the summer. The annual biomass was estimated in 2 513 to 21 659 tons, the high value corresponded to 1986, with potential yields between 7 472 and 10 071 tons. A local fishery seems viable but needs further evidence. Rev. Biol. Trop. 56 (3): 1343-1359. Epub 2008 September 30.
El barrilete Katsuwonus pelamis, considerado en el grupo de los atunes menores, es una especie epipelágica, distribuida en aguas tropicales y subtropicales del mundo, que ha llegado a convertirse en uno de los atunes más capturados. Sin embargo, en México se han realizado pocos estudios a pesar de su importancia en esta región. Analicé la información recolectada en 18 cruceros oceanográficos en la zona económica exclusiva mexicana del Golfo de México y Mar Caribe (1982 a 1992). Las muestras se obtuvieron mediante arrastres oblicuos de redes tipo bongo de 60 cm de boca y malla de 0.333 mm. Las máximas abundancias de larvas se presentaron en primavera y verano, y 1986 se caracterizó por tener una mayor población, un total de 4 881.8544 x 10(9) larvas, 1983 tuvo la más baja densidad con 566.3748 x 10(9). El barrilete se encontraba entonces en las condiciones adecuadas para su reproducción en esta área, siendo la región sudoccidental la más productiva; el desove fue mayor en verano. Las biomasas calculadas por temporada fueron de 2 513 a 21 659 toneladas, correspondiendo a 1986 el valor más alto, con un rendimiento potencial entre 7 472 y 10 071 t. Es factible explotarlo en el Golfo de México si otra información corrobora estos resultados.
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Animais , Perciformes/classificação , Larva , México , Densidade Demográfica , Dinâmica PopulacionalRESUMO
The epipelagic fish known as skipjack (Katsuwonus pelamis) is considered inside the "little tuna" group. The species is distributed in tropical and subtropical waters worldwide. Despite its fisheries importance in Mexico, there is little knowledge about the species in the region. The information from 18 oceanographic cruises inside the Mexican exclusive economic zone in the Gulf of Mexico and Caribbean Sea, was analyzed for the period 1982 to 1992. Plankton was collected in a paired 60 cm mouth bongo net sampler with 0.333 mm mesh nets in oblique tows. The maximum abundance was in spring and summer; 1986 had the largest population (4 881.8544 X 10(9) larvae) and 1983 the lowest density (566.3748 X 10(9)). The skipjack has suitable conditions for reproduction in this area, and the southwestern region is the most productive. The spawning was greater in the summer. The annual biomass was estimated in 2 513 to 21 659 tons, the high value corresponded to 1986, with potential yields between 7 472 and 10 071 tons. A local fishery seems viable but needs further evidence.