scholarly journals First tardigrade records from San Pedro Mártir, Baja California, Mexico

Check List ◽  
2021 ◽  
Vol 17 (4) ◽  
pp. 1131-1136
Author(s):  
Patricia G. Núñez ◽  
Gisela A. León-Espinosa ◽  
Roberto Vázquez ◽  
Manet E. Peña-Salinas ◽  
Gabino A. Rodríguez-Almaraz ◽  
...  
Keyword(s):  
Baja California ◽  
The State ◽  
Species Level ◽  
Pinus Jeffreyi ◽  
Western Mexico ◽  
Genus Level ◽  
San Pedro ◽  
North Western

A total of 66 specimens representing four tardigrade taxa were found in 14 moss and lichen samples collected from the bark of Jeffrey’s Pine, Pinus jeffreyi Balf., in the Sierra de San Pedro Mártir (Baja California, north-western Mexico). Two taxa were identified to the species level (Echiniscus becki Schuster & Grigarick, 1966 and E. blumi Richters, 1903), and two to the genus level (Milnesium sp. and Ramazzottius sp.). These are the first tardigrade records from the state of Baja California, and they increase the known tardigrade diversity of Mexico to 84 species.

scholarly journals Response to spiders of Odisha: a preliminary checklist additions to the spider checklist of Odisha

2019 ◽  
Vol 11 (12) ◽  
pp. 14629-14630
Author(s):  
John T.D. Caleb
Keyword(s):  
The State ◽  
Species Level ◽  
Spider Species ◽  
Genus Level

Choudhury et al. (2018) presented a preliminary list of 248 spider species known to occur from Odisha State based on the compilation of all published literature and fresh collections carried out during 2016-17. This is the most recent paper providing an overall view of the spider diversity known in the state. However, the presented checklist seems to be incomplete, since not all species have been identified up to the species level. Several species, as many as 77 morphospecies, were identified up to the genus level only. Furthermore, it has also missed out on recording several species described from Odisha state itself.

scholarly journals Climate change and forest plagues: assessing current and future impacts of diprionid sawflies on the pine forests of north-western Mexico

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7220 ◽  
Author(s):  
Víctor M. Aguilera-Molina ◽  
Khutzy K. Munguía-Ortega ◽  
Eulogio López-Reyes ◽  
Andrés Martínez-Aquino ◽  
F. Sara Ceccarelli
Keyword(s):  
Climate Change ◽  
National Park ◽  
Sawfly Larvae ◽  
Western Mexico ◽  
Jeffrey Pine ◽  
San Pedro ◽  
One Year ◽  
Imminent Threat ◽  
Sierra San Pedro Martir ◽  
North Western

The imminent threat of climate change lies in its potential to disrupt the balance of ecosystems, particularly vulnerable areas such as mountain-top remnant forests. An example of such a fragile ecosystem is the Sierra San Pedro Mártir (SSPM) National Park of Mexico’s Baja California state, where high levels of endemism can be found, and which is home to one of the country’s few populations of the emblematic Jeffrey pine (Pinus jeffreyi). Recent outbreaks of pine-feeding sawfly larvae in SSPM increase the vulnerability of this forest ecosystem, calling for immediate assessments of the severity of this threat. Here, we present a thorough study of the sawfly’s biology and distribution, carrying out molecular and morphology-based identification of the species and creating model-based predictions of the species distribution in the area. The sawfly was found to belong to an undescribed species of the genus Zadiprion (family Diprionidae) with a one-year life-cycle. The distribution of this species appears to be restricted to the SSPM national park and it will probably persist for at least another 50 years, even considering the effects of climate change.

scholarly journals Primeros registros de Erythemis vesiculosa (Fabricius, 1775; Odonata: Libellulidae) y de Ischnura barberi Currie, 1903 (Odonata: Coenagrionidae) para Baja California Sur, México/Fisrt records of Erythemis vesiculosa (Fabricius, 1775; Odonata: Libellulidae) and Ischnura barberi Currie, 1903 (Odonata: Coenagrionidae) from Baja California Sur, Mexico

2015 ◽  
Vol 31 (3) ◽  
pp. 502
Author(s):  
Gerardo Marrón ◽  
Roberto Carmona ◽  
Adriana Hernández-Álvarez
Keyword(s):  
Baja California ◽  
The State ◽  
Baja California Sur ◽  
Number Of Species ◽  
San Pedro ◽  
Sewage Ponds

We report the first records of two species of Odonata for Baja California Sur. An individual of Erythemis vesiculosa was in the southern part of the state at San Pedro del Palmar, an oasis near Todos Santos, 1 October 2014, and a couple of Ischnura barberi were in the northern part of the state at the Guerrero Negro sewage ponds 21 October 2014; both were photographed. These observations increase to 57 the number of species of the order Odonata recorded in BajaCalifornia Sur.

scholarly journals High amphibian diversity related to unexpected environmental values in a biogeographic transitional area in north-western Mexico

2014 ◽  
Vol 83 (2) ◽  
pp. 151-166 ◽  
Author(s):  
José M. Serrano ◽  
César A. Berlanga-Robles ◽  
Arturo Ruiz-Luna
Keyword(s):  
Species Turnover ◽  
Strong Association ◽  
The State ◽  
Environmental Data ◽  
Humid Climate ◽  
Transitional Area ◽  
Western Mexico ◽  
Β Diversity ◽  
Additive Formulation ◽  
North Western

Amphibian diversity and distribution patterns in Sinaloa state (north-western Mexico) were assessed from the Global Amphibian Assessment database (GAA-2010). A geographic information system (GIS) was used to evaluate diversity based on distribution maps of 41 species, associated with environmental data. The highest α and γ-diversities were identified in the south-eastern portion of the state, in mountain zones with a warm sub-humid climate, whereas the greatest β-diversity (multiplicative formulation) was aggregated in patches in the western portion of the state in mountains with temperate climates. A cluster analysis and Mantel test showed a strong association of Sorensen’s dissimilarity (additive formulation of β-diversity) with climate and soil moisture categories rather than physiographic categories. Additionally, the partition of Sorensen´s dissimilarity into its components (turnover and nestedness) showed a gradient of species turnover related to contrasting climate units and a marked pattern of nestedness between the middle mountains and the coastal plain. The results of the study suggest that the highest α and β-diversity values occur in the middle-humidity range as well in the transitional-climate categories. This pattern is unusual for amphibian distributions because the highest global and regional amphibian diversities are typically related to high humidity values and climate stability (warm and wet most of the year). This particular pattern, occurring in a transitional area, encourages further biological and ecological studies to clarify the status of amphibian populations and support conservation measures.

scholarly journals Simultaneous generalized and low-layer SCIDAR turbulence profiles at san pedro mártir observatory

2019 ◽  
Vol 490 (1) ◽  
pp. 1397-1405 ◽  
Author(s):  
R Avila ◽  
O Valdés-Hernández ◽  
L J Sánchez ◽  
I Cruz-González ◽  
J L Avilés ◽  
...  
Keyword(s):  
High Altitude ◽  
Wind Direction ◽  
Close Agreement ◽  
Baja California ◽  
Ground Level ◽  
Combined Effect ◽  
Moderate Altitude ◽  
San Pedro ◽  
Simultaneous Measurements

ABSTRACT We present optical turbulence profiles obtained with a Generalized SCIDAR (G-SCIDAR) and a low-layer SCIDAR (LOLAS) at the Observatorio Astronómico Nacional in San Pedro Mártir (OAN-SPM), Baja California, Mexico, during three observing campaigns in 2013, 2014, and 2015. The G-SCIDAR delivers profiles with moderate altitude-resolution (a few hundred metres) along the entire turbulent section of the atmosphere, while the LOLAS gives high altitude resolution (on the order of tens of metres) but only within the first few hundred metres. Simultaneous measurements were obtained on 2014 and allowed us to characterize in detail the combined effect of the local orography and wind direction on the turbulence distribution close to the ground. At the beginning of several nights, the LOLAS profiles show that turbulence peaks between 25 and 50 m above the ground, not at ground level as was expected. The G-SCIDAR profiles exhibit a peak within the first kilometre. In 55 per cent and 36 per cent of the nights stable layers are detected between 10 and 15 km and at 3 km, respectively. This distribution is consistent with the results obtained with a G-SCIDAR in 1997 and 2000 observing campaigns. Statistics computed with the 7891 profiles that have been measured at the OAN-SPM with a G-SCIDAR in 1997, 2000, 2014, and 2015 campaigns are presented. The seeing values calculated with each of those profiles have a median of 0.79, first and third quartiles of 0.51 and 1.08 arcsec, which are in close agreement with other long term seeing monitoring performed at the OAN-SPM.

scholarly journals Comparative Immature Morphology of Brazilian Fire Ants (Hymenoptera: Formicidae:Solenopsis)

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Eduardo Gonçalves Paterson Fox ◽  
Daniel Russ Solis ◽  
Mônica Lanzoni Rossi ◽  
Jacques Hubert Charles Delabie ◽  
Rodrigo Fernando de Souza ◽  
...  
Keyword(s):  
Intraspecific Variation ◽  
Solenopsis Invicta ◽  
Morphological Traits ◽  
Species Level ◽  
Fire Ants ◽  
Fire Ant ◽  
Solenopsis Geminata ◽  
Body Dimensions ◽  
Larval Instars ◽  
Genus Level

Although common in Brazil, the biology of the fire antSolenopsis saevissima(Smith) is still poorly studied. Larval descriptions are useful to genus-level ant systematics and sometimes to species-level taxonomy. This study presents a detailed description of juveniles ofS. saevissimafrom Brazil, which were compared with Brazilian specimens ofSolenopsis invictaBuren,Solenopsis geminata(Fabricius), andSolenopsis altipunctataPitts. Different larval instars were separated by diagnostic morphological traits which were confirmed by observing moults. Reproductive larvae could be easily sorted by their distinctive body dimensions and shape. Contrary to previous reports on this species, the larvae ofS. saevissimaproved to be generally identical to those ofS. invicta, while a few specimens resembled those of other close species, such asSolenopsis megergatesTrager. Mature larvae thus presented considerable intraspecific variation in some characters recently proposed to aid fire ant species separation (morphology of head hairs).

A survey of ecotourism on islands in northwestern México

1999 ◽  
Vol 26 (3) ◽  
pp. 212-217 ◽  
Author(s):  
B.R. TERSHY ◽  
L. BOURILLÓN ◽  
L. METZLER ◽  
J. BARNES
Keyword(s):  
Government Regulation ◽  
Costs And Benefits ◽  
Management Options ◽  
Western Mexico ◽  
Human Use ◽  
Northwestern Mexico ◽  
Negative Impacts ◽  
North Western

The >150 islands in north-western México are relatively pristine, but may easily be damaged by unregulated human use. Tourists visit many of these islands, but their numbers and impact are unknown. To examine some of the costs and benefits of ecotourism we sent a questionnaire to 42 ecotourism companies that visit islands in north-western México; 29 respondents reported that tourist days on these islands had increased at >7% yr-1, from <15 000 in 1986 to about 47 000 in 1993. Neither government regulation nor cost of trips were reported to be important impediments to tourism growth. In 1993, ecotourist organizations visiting islands reported spending US$3.7 million, none of which went directly to the protection and management of the islands. We provide several management options to increase the conservation benefits of ecotourism and minimize the negative impacts.

Squat lobsters (Crustacea: Decapoda: Anomura: Galatheoidea) from off the northwestern coast of the Baja California Peninusla, Mexico

Zootaxa ◽  
2021 ◽  
Vol 4965 (2) ◽  
pp. 375-384
Author(s):  
MICHEL E. HENDRICKX
Keyword(s):  
West Coast ◽  
Gulf Of California ◽  
Baja California ◽  
Baja California Peninsula ◽  
The West ◽  
Western Mexico ◽  
Exploratory Survey ◽  
Northwestern Coast ◽  
First Time ◽  
Squat Lobsters

Four species of squat lobsters were collected off the northwestern coast of the Baja California Peninsula, Mexico, during an exploratory survey of fishing resources. Janethogalathea californiensis, described from California was previously known from off the west coast of the Baja California Peninsula (two localities) and from the Gulf of California (three localities). Of the three species of Munida collected during the survey, M. tenella is recorded off the west coast of the Baja California Peninsula for the first time. These are the fourth record of M. hispida and the second record of M. quadrispina in western Mexico.

scholarly journals Matrix-assisted Laser Desorption Ionization-Time-of-Flight Mass Spectrometry (MALDI-TOF MS) as a Reliable Tool to Identify Species of Catalase-negative Gram-positive Cocci not Belonging to the Streptococcus Genus

2016 ◽  
Vol 10 (1) ◽  
pp. 202-208 ◽  
Author(s):  
Marisa Almuzara ◽  
Claudia Barberis ◽  
Viviana Rojas Velázquez ◽  
Maria Soledad Ramirez ◽  
Angela Famiglietti ◽  
...  
Keyword(s):  
Extraction Methods ◽  
Species Level ◽  
Ionization Time ◽  
Maldi Tof Ms ◽  
Genus Level ◽  
Maldi Tof ◽  
Flight Mass Spectrometry ◽  
Level Identification ◽  
Gram Positive Cocci ◽  
Tof Ms

Objective:To evaluate the performance of matrix-assisted laser desorption ionization-time-of-flight mass spectrometry (MALDI-TOF MS) by using 190 Catalase-negative Gram-Positive Cocci (GPC) clinical isolates.Methods:All isolates were identified by conventional phenotypic tests following the proposed scheme by Ruoff and Christensen and MALDI-TOF MS (Bruker Daltonics, BD, Bremen, Germany). Two different extraction methods (direct transfer formic acid method on spot and ethanol formic acid extraction method) and different cut-offs for genus/specie level identification were used. The score cut-offs recommended by the manufacturer (≥ 2.000 for species-level, 1.700 to 1.999 for genus level and <1.700 no reliable identification) and lower cut-off scores (≥1.500 for genus level, ≥ 1.700 for species-level and score <1.500 no reliable identification) were considered for identification. A minimum difference of 10% between the top and next closest score was required for a different genus or species.MALDI-TOF MS identification was considered correct when the result obtained from MS database agreed with the phenotypic identification result.When both methods gave discordant results, the 16S rDNA orsodAgenes sequencing was considered as the gold standard identification method. The results obtained by MS concordant with genes sequencing, although discordant with conventional phenotyping, were considered correct. MS results discordant with 16S orsodA identification were considered incorrect.Results:Using the score cut-offs recommended by the manufacturer, 97.37% and 81.05% were correctly identified to genus and species level, respectively. On the other hand, using lower cut-off scores for identification, 97.89% and 94.21% isolates were correctly identified to genus and species level respectively by MALDI-TOF MS and no significant differences between the results obtained with two extraction methods were obtained.Conclusion:The results obtained suggest that MALDI-TOF MS has the potential of being an accurate tool for Catalase-negative GPC identification even for those species with difficult diagnosis asHelcococcus,Abiotrophia,Granulicatella, among others. Nevertheless, expansion of the library, especially including more strains with different spectra on the same species might overcome potential “intraspecies” variability problems. Moreover, a decrease of the identification scores for species and genus-level identification must be considered since it may improve the MALDI-TOF MS accuracy.

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