Estudio exploratorio de la optimización de muestreo con "core" en laguna sin vegetación (Albufera, València, España)

Exploratory study on the optimisation of sampling effort in a non-vegetated lagoon within a Mediterranean wetland (Albufera Natural Park, Valencia, Spain).

The analysis of macroinvertebrate communities is essential in aquatic ecology studies. Nonetheless, sample collection, processing and species determination of macroinvertebrates are extremely time-consuming and require huge efforts. Moreover, despite the crucial need for refined sampling protocols, investigations on viable benchmark sampling efforts are still scarce. This study provides a preliminary analysis on the optimisation of the sampling effort required to study macroinvertebrate communities from rice fields. Twenty core sediment samples were collected from a non-vegetated Mediterranean lagoon (rice field) in Valencia (Spain), and their macroinvertebrate community assemblages were obtained. Characterisations of the minimum number of samples needed for both faunistic inventories and environmental quality assessments were carried out using diversity indexes (number of taxa, Shannon, Simpson, and Margalef indexes), ecological indicators (Nutritional Mode Index, IMN) and several species richness estimators (Chao 1, Chao 2, Jacknife 1, Jacknife 2, ACE, ICE, Bootstrap and EstimateS 9.1.0). Our results indicate that in surveys in which the taxa richness of the communities is the objective, 20 samples or even more could be needed. However, when the objective of the study is to assess the environmental quality by means of ecological indexes such as the IMN, three samples could be an acceptable benchmark. Our findings, despite being limited by our experiment conditions, can provide methodological guidelines for ecological assessments in Mediterranean rice fields and shallow non-vegetated lagoons. Further research involving multiple study areas and seasonal patterns will help meliorate the accuracy of this protocol and refine sampling efforts in wetlands.

Figura 1. Laguna de l'Albufera, València, Spain.

Publicado en "Ecological Indicators, 117: 106538"

Descargar el artículo en este link: 

https://www.sciencedirect.com/science/article/abs/pii/S1470160X20304751?via%3Dihub

Mosquitos picadores de lagunas temporales de Costa Rica y Nicaragua

De entre los macroinvertebrados acuáticos, los mosquitos (Diptera: Culicidae) poseen un interés notorio a nivel mundial por su capacidad para transmitir patógenos que pueden causar enfermedades de gran importancia médica y veterinaria. En Centroamérica, existe en la actualidad gran preocupación por algunas enfermedades transmitidos por culícidos, entre las que destacan arbovirosis como el dengue, y más recientemente el chikungunya y el Zika, pero también encefalitis virales, como la fiebre por virus West Nile, o parasitosis de gran importancia, como la malaria. En el contexto de la caracterización limnológica de diferentes lagunas temporales del bosque tropical seco de Costa Rica y Nicaragua, se recolectó un total de 7172 larvas de mosquitos durante dos periodos de muestreo (2010-2011 y 2017-2018). La toma de muestras se realizó por medio de una red de mano con una malla de 250 μm de luz de poro. En el laboratorio, mediante lupa binocular, microscopio y claves específicas, se identificaron 22 especies pertenecientes a los géneros Anopheles, Aedeomyia, Aedes, Culex, Mansonia, Psorophora y Uranotaenia. Aedes pertinax y Aedes tortilis se reportan por primera vez para Costa Rica. Se discuten las posibles implicaciones en la transmisión de agentes patógenos por parte de estos culícidos. Esta información permitirá actualizar aspectos sobre la diversidad de los mosquitos en ambos países y proporcionar una valiosa herramienta de vigilancia entomológica en el futuro.

Among aquatic macroinvertebrates, mosquitoes (Diptera: Culicidae) have a worldwide interest for their ability to transmit pathogens that can cause diseases of great medical and veterinary importance. In Central America there is great concern today about mosquito-borne diseases, particularly arboviral diseases such as dengue and, more recently, chikungunya and Zika, but also viral encephalitis such as West Nile fever, and parasitosis of great importance such as malaria. Frequently, some mosquito (Diptera: Culicidae) breeding sites are known and monitored regularly to achieve the corresponding integrated management, especially in urban and peri-urban environments, but not in natural environments, usually less studied. In the context of a study on the limnological characterization of different temporary ponds in the dry tropical forest of Costa Rica and Nicaragua, a total of 7172 mosquito larvae were collected during two sampling periods (2010-2011 and 2017-2018). Sample collection was done by means of a hand net with a mesh of 250 μm of pore size. In the laboratory, 22 species were identified using a stereomicroscope, microscope, and specific keys, belonging to the genera Aedeomyia, Aedes, Anopheles, Culex, Mansonia, Psorophora and Uranotaenia. Aedes pertinax and Aedes tortilis are reported for the first time for Costa Rica. The possible implications in the transmission of pathogens by these culicids were discussed. This information will allow to update aspects about the diversity of mosquitoes in both countries and provide a useful entomological surveillance tool in the future.

Publicado en Limnetica 39 (2): 579-600

Descargar en este enlace: http://limnetica.com/es/mosquitos-diptera-culicidae-de-lagunas-temporales-de-costa-rica-y-nicaragua

Figura 1. Situación de las lagunas temporales estudiadas.

Mosquitos picadores de jarabacoa (República Dominicana) Checklist

In the Dominican Republic, mosquito-borne diseases are very interesting due to their great medical relevance. The present research deepens on the diversity of the culicids existing in the municipality of Jarabacoa, in order to update the information on these dipterans and their main breeding sites, natural and artificial. For this purpose, immature stages of mosquitoes were collected by dipping method; plastic pipettes were used for small breeding sites. Sample were identified under a magnifying glass, or under a binocular microscope, with the help of spe-cific taxonomic keys. Sixteen species belonging to the genus Aedes Meigen, 1818, Anopheles Meigen, 1818, Culex Linnaeus, 1758, Toxorhynchites Theobald, 1901, Uranotaenia Lynch Arribálzaga, 1891 and Wyeomyia Theobald, 1901 were collected, on which diverse questions about their bioecology and role on pathogen trans-mission of medical importance were analyzed. Culex biscaynensis Zavortink & O’Meara, 1999 is recorded for the first time for the Caribbean islands and the number of mosquito species in the country rises to 50.

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RESUMENEn República Dominicana tienen especial interés, dada su gran relevancia médica, las enfermedades transmiti-das por mosquitos. La presente investigación profundiza sobre la diversidad de los culícidos existentes en el muni-cipio de Jarabacoa, a fin de actualizar la información sobre estos dípteros y sus principales sitios de cría, naturales y artificiales. Para tal cometido, se procedió a la búsqueda activa de formas preimaginales mediante la técnica del dipper; se utilizaron pipetas plásticas para muestrear en reservorios de pequeño tamaño. La identificación se llevó a cabo mediante la utilización de lupa binocular y microscopio, con la ayuda de claves taxonómicas específicas. Se capturaron 16 especies pertenecientes a los géneros Aedes Meigen, 1818, Anopheles Meigen, 1818, Culex Linnaeus, 1758, Toxorhynchites Theobald, 1901, Uranotaenia Lynch Arribálzaga, 1891 y Wyeomyia Theobald, 1901, sobre las que se analizaron diversas cuestiones acerca de su bioecología y su papel en la transmisión de agentes patógenos de importancia médica. Se reporta Culex biscaynensis Zavortink & O’Meara, 1999 por primera vez en el Caribe insular, con lo que el número de especies de mosquitos citadas en el país se eleva a 50.

Incluye una primera cita para la Hispaniola: Culex biscaynensis Zavortink & O'Meara, 1999, una especie interesante !!!

Figura 1. Sifón respiratorio de Culex biscaynensis.

Descargar una copia del artículo:

http://graellsia.revistas.csic.es/index.php/graellsia/article/view/591/772

Especie nueva para la Ciencia encontrada en el río Palancia y Menorca !! "Cypris pretusi" Mesquita-Joanes, Aguilar-Alberola, Palero & Rueda 2020

The genus Cypris, considered the oldest ostracod generic name erected using the Linnean system, comprises a reduced number of large-bodied species, mostly found in Africa and Asia. Only six of them are known to occur in Europe. Here we describe a new species, Cypris pretusi sp. nov., collected in small temporary streams and ponds along the Eastern Iberian Peninsula and Minorca (Balearic Islands). The new species is very close to the type species of the genus, Cypris pubera O.F. Müller, 1776, but differs from it in having a set of smaller subequal spines on the posterior edge of the valves, by the absence of conspicuous spines along the front edge, and by the beak-like frontal shape of its carapace in dorsal view, similar to Cypris decaryi Gauthier, 1933. Soft parts are very similar to the type species, but it differs in having shorter swimming setae on the second antennae. Molecular analyses of the COX1 region support its status as a species distinct from C. pubera and closer to Cypris bispinosa Lucas, 1849, also providing evidence for a separation of C. pubera s.l. in two clades, one of which is here considered to correspond to Cypris triaculeata Daday, 1892. We discuss the relationships of C. pretusi sp. nov. to other members of the genus and its possible origin from nearby biogeographic regions (probably Africa or Asia) and provide a key to species of Cypris found in Europe. We also discuss the relationship between Monoculus concha pedata (= M. conchaceus), the first ostracod named by Linnæus, and Cypris pubera, the type species of the genus, described by Müller in 1776 and considered by him the same species as the one first named by Linnæus.

Publicado en Zootaxa 4759 (1): 113-131

Figura 1. Cypris pretusi del Palancia.

Puedes descargar en este link: https://www.biotaxa.org/Zootaxa/article/view/zootaxa.4759.1.8/60518