Sergio Flores-Ramirez

Dr. Sergio Flores-Ramirez

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Research Focus & Metrics

Academic Career Length

3Years (2024-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 May 2024 in Diversity
Verified
Journal Article
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FLFrancisco Oma López-Fuerte
Francisco Oma López-Fuerte
DSDAVID ALFARO SIQUEIROS-BELTRONES
DAVID ALFARO SIQUEIROS-BELTRONES
LHLuis Gerardo Hernández
Luis Gerardo Hernández
Sergio Flores-RamirezSergio Flores-Ramirez
Sergio Flores-Ramirez
Diatoms are among the most common epibionts and have been recorded on the surfaces of various living substrates, either plants or animals. However, studies on them are still scarce in view of the many substrata available. In this study, epibiotic diatoms living on Callinectes bellicosus were identified for the first time from a subtropical coastal lagoon in Northwest Mexico. We tested the null hypothesis that the diatom flora living on the carapaces of C. bellicosus would not be similar to that recorded for mangrove sediments, its typical habitat. The epibiotic diatoms were brushed off from the carapaces of two specimens, acid-cleaned, mounted in synthetic resin, and identified based on frustule morphology. This way, 106 taxa from 46 genera were recorded, including 25 singletons, and 6 new records for the Mexican northwest region. The best-represented genera were Nitzschia (10 taxa), Mastogloia (9), Diploneis (8), Navicula (7), Amphora (5), Cocconeis (5), Tryblionella (4), and Gyrosigma (4). Species composition included 93% of local taxa, thus refuting the proposed hypothesis and supporting the alternate one. Although the estimated species richness was lower than that in sediments, it deems the green crab carapace a favorable substrate for the growth of benthic diatoms.

3 September 2026 in The Wilson Journal of Ornithology
Verified
Journal Article
Closed access
RCRoberto Carmona
Roberto Carmona
Sergio Flores-RamirezSergio Flores-Ramirez
Sergio Flores-Ramirez
GMGerardo Marrón
Gerardo Marrón
JGJorge A. Guzmán-Segura
Jorge A. Guzmán-Segura
Intraspecific diversity provides the genetic and phenotypic variation necessary for long-term adaptation and persistence (Moritz 1994). Subspecies often represent geographically distinct evolutiona...

24 April 2024 in Preprints.org
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Preprint
Open access
PDF file
FLFrancisco Oma López-Fuerte
Francisco Oma López-Fuerte
DSDAVID ALFARO SIQUEIROS-BELTRONES
DAVID ALFARO SIQUEIROS-BELTRONES
LHLuis Gerardo Hernández
Luis Gerardo Hernández
Sergio Flores-RamirezSergio Flores-Ramirez
Sergio Flores-Ramirez
Diatoms are among the most common epibionts and have been recorded on the surfaces of various living substrates, either plants or animals. However, said studies are still scarce in view of the many substrata available. In this study, epibiotic diatoms living on Callinectes bellicosus were identified for the first time from a subtropical coastal lagoon in northwest Mexico. We tested the null hypothesis that the diatom flora living on the shells of C. bellicosus would not be similar to that recorded for mangrove sediments, its typical habitat. The epibiotic diatoms were brushed off from the carapaces of two specimens, acid-cleaned, mounted in synthetic resin, and identified based on frustule morphology. In this way, 106 taxa from 45 genera were recorded, including 24 singletons, and six new records for the Mexican northwest region. The best-represented genera were Nitzschia (10 taxa), Mastogloia (9), Diploneis (7), Navicula (7), Amphora (5), Cocconeis (5), Tryblionella (4), and Gyrosigma (4). Species composition included 93% of local taxa, thus refuting the proposed hypothesis and supporting the alternate one. Although the estimated species richness was lower than in sediments, it deems the green crab carapace a favorable substrate for the growth of benthic diatoms.

Verified
Journal Article
Open access
PDF file
FLFrancisco Oma López-Fuerte
Francisco Oma López-Fuerte
RCRoberto Carmona
Roberto Carmona
Sergio Flores-RamirezSergio Flores-Ramirez
Sergio Flores-Ramirez
MLMelania Cecilia López-Castro
Melania Cecilia López-Castro
Human exploitation has been a major driver of marine turtle population declines, particularly affecting naturally scarce species such as the pantropical hawksbill turtle. Although hawksbill sea turtles have been documented in the Gulf of California since the early 20th century, data on their historical demography during periods of high exploitation in this region are nonexistent. We investigated the size structure of hawksbill turtles from the Western Central Gulf of California by examining a unique sample of decorative taxidermies, corresponding to 31 specimens captured during fishing operations near Santa Rosalía, Baja California Sur, Mexico, between 1980 and 1990. An analysis of the curved carapace measures revealed a length range (nuchal notch to posterior of supracaudals) of 29.5–59.5 cm (mean = 38.75 ± 6.67 cm) and a width range of 25.0–51.5 cm (mean = 33.63 ± 5.66 cm), with 87% of specimens having lengths between 30 and 45 cm. Based on the carapace length measurements, we estimated the ages to be between 7 and 20 years, indicating that the population included juveniles. Our findings provide baseline data for an understudied period and region, suggesting that this area previously served as an important juvenile habitat. These results contribute essential historical demographic information for conservation planning.