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Hector Espinosa‐Pérez
Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, Tercer Circuito Exterior S/N. Mexico City CP 045110, Mexico

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Journal article
Published: 24 September 2020 in Diversity
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The Astyanax species complex has two morphs: a blind, depigmented morph which inhabits caves in México and an eyed, pigmented surface-dwelling morph. The eyed morph can also be found in a few caves, sometimes hybridizing with the cave morph. This species complex has arguably become the most prominent model system among cave organisms for the study of evolutionary development and genomics. Before this study, 32 caves were known to be inhabited by the cave morph, 30 of them within the El Abra region. The purpose of this study was to conduct new surveys of the area and to assess some unconfirmed reports of caves presumably inhabited by troglomorphic fish. We describe two new localities, Sótano del Toro #2 and Sótano de La Calera. These two caves comprise a single hydrologic system together with the previously described cave of Sótano del Toro. The system is inhabited by a mixed population of troglomorphic, epigeomorphic, and presumably hybrid fish. Furthermore, Astyanax cavefish and the mysid shrimp Spelaeomysis quinterensis show a phylogeographic convergence that supports the notion that the central Sierra de El Abra is a biogeographical region that has influenced the evolutionary history of its aquatic community across species. The presumptive location of the boundaries of this biogeographical region are identified.

ACS Style

Luis Espinasa; Claudia Patricia Ornelas-García; Laurent Legendre; Sylvie Rétaux; Alexandra Best; Ramses Gamboa-Miranda; Hector Espinosa-Pérez; Peter Sprouse. Discovery of Two New Astyanax Cavefish Localities Leads to Further Understanding of the Species Biogeography. Diversity 2020, 12, 368 .

AMA Style

Luis Espinasa, Claudia Patricia Ornelas-García, Laurent Legendre, Sylvie Rétaux, Alexandra Best, Ramses Gamboa-Miranda, Hector Espinosa-Pérez, Peter Sprouse. Discovery of Two New Astyanax Cavefish Localities Leads to Further Understanding of the Species Biogeography. Diversity. 2020; 12 (10):368.

Chicago/Turabian Style

Luis Espinasa; Claudia Patricia Ornelas-García; Laurent Legendre; Sylvie Rétaux; Alexandra Best; Ramses Gamboa-Miranda; Hector Espinosa-Pérez; Peter Sprouse. 2020. "Discovery of Two New Astyanax Cavefish Localities Leads to Further Understanding of the Species Biogeography." Diversity 12, no. 10: 368.

Preprint
Published: 17 August 2020
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The Astyanax species complex has two morphs: a blind, depigmented morph which inhabits caves in México and an eyed, pigmented surface-dwelling morph. The eyed morph can also be found in caves, sometimes hybridizing with the cave morph. This species complex has arguably become the most prominent model system among cave organisms for the study of evolutionary development and genomics. Before this study, 32 caves were known to be inhabited by the cave morph, 30 of them within the El Abra region. The purpose of this study was to conduct new surveys of the area and to assess some unconfirmed reports of caves presumably inhabited by troglomorphic fish. We describe two new localities, Sótano del Toro #2 and Sótano de La Calera. These two caves make a single hydric system together with the previously described cave of Sótano del Toro. The system is inhabited by a mixed population of troglomorphic, epigeomorphic and presumably hybrid fish. Furthermore, Astyanax cavefish and the mysid shrimp Spelaeomysis quinterensis show a phylogeographic convergence that supports the notion that the central Sierra de El Abra is a biogeographical region that has influenced the evolutionary history of its aquatic community across species. The presumptive location of its boundaries, which may limit cave-to-cave or surface-to-cave gene flow, are identified.

ACS Style

Luis Espinasa; Claudia Patricia Ornelas-García; Laurent Legendre; Sylvie Rétaux; Alexandra Best; Ramses Gamboa-Miranda; Hector Espinosa-Pérez; Peter Sprouse. Two New Localities of Astyanax Cavefish Plus Revision of its Biogeography. 2020, 1 .

AMA Style

Luis Espinasa, Claudia Patricia Ornelas-García, Laurent Legendre, Sylvie Rétaux, Alexandra Best, Ramses Gamboa-Miranda, Hector Espinosa-Pérez, Peter Sprouse. Two New Localities of Astyanax Cavefish Plus Revision of its Biogeography. . 2020; ():1.

Chicago/Turabian Style

Luis Espinasa; Claudia Patricia Ornelas-García; Laurent Legendre; Sylvie Rétaux; Alexandra Best; Ramses Gamboa-Miranda; Hector Espinosa-Pérez; Peter Sprouse. 2020. "Two New Localities of Astyanax Cavefish Plus Revision of its Biogeography." , no. : 1.

Chapter
Published: 10 May 2019 in Astrobiology and Cuatro Ciénegas Basin as an Analog of Early Earth
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The fish fauna of the Cuatro Ciénegas Basin (CCB) has been widely studied, and many aspects of its populations are known. Previous studies have, for example, clarified genetic identities and discovered new species and their feeding habits. Nevertheless, in the last two decades, there has been a notorious change in fish diversity, together with fluctuations in population numbers throughout seasons and years. It is known that anthropogenic activities have altered water levels and flow, resulting in the swamps’ desertification. Also, the introduction of at least two exotic species that compete with or prey upon native species has triggered its displacement and population decline. As a consequence, the unique and highly endemic fish diversity has drastically changed and is now in peril. We analyse and discuss the fish systematics under biogeographic, historical, ecological, and evolutionary perspectives, to offer a wide view of the ecosystem. The approach used in this study could contribute to the conservation of this desert aquatic environment and its biota.

ACS Style

Héctor Espinosa-Pérez; Christian Lambarri-Martínez. Systematics of the Fish from the Cuatro Ciénegas Basin. Astrobiology and Cuatro Ciénegas Basin as an Analog of Early Earth 2019, 161 -173.

AMA Style

Héctor Espinosa-Pérez, Christian Lambarri-Martínez. Systematics of the Fish from the Cuatro Ciénegas Basin. Astrobiology and Cuatro Ciénegas Basin as an Analog of Early Earth. 2019; ():161-173.

Chicago/Turabian Style

Héctor Espinosa-Pérez; Christian Lambarri-Martínez. 2019. "Systematics of the Fish from the Cuatro Ciénegas Basin." Astrobiology and Cuatro Ciénegas Basin as an Analog of Early Earth , no. : 161-173.

Journal article
Published: 03 September 2018 in Revista Mexicana de Biodiversidad
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Se presenta el estudio de la ictiofauna de bahía de La Paz (BLP), sustentado en una lista taxonómica actualizada con notas zoogeográficas, de conservación e importancia económica. La lista consta de 533 especies, 314 géneros, 123 familias, 34 órdenes y 2 clases: Actinopterygii (467 especies) y Chondrichthyes (66 especies). El orden Perciformes representó 56% de la ictiofauna total, con 10 familias que corresponden al 34% de la riqueza específica. La mayor afinidad íctica con las provincias de Cortés (82.4%) y Mexicana (68.3%), sugiere la existencia de una zona de transición para especies templadas y tropicales. Los hábitats preferenciales son fango arenosos (38%), rocosos (30%) y biotopos de manglar (29%). Según la UICN, 84% son especies de preocupación menor y no evaluadas, el 16% corresponde a otras categorías de riesgo. La NOM-059-Semarnat-2010, incluye 6 teleósteos bajo protección especial y 2 especies amenazadas de condrictios. De acuerdo con la UICN, 188 especies son de interés comercial; adicionalmente, 82 se capturan artesanalmente en la BLP. Los resultados de este estudio servirán de base para la formulación de propuestasde manejo, tasas de captura o planes de maricultivo de especies locales, excluyendo a aquellas cuya distribución no corresponde a la BLP y, en general, al Pacífico oriental tropical (POT).

ACS Style

Adrián Felipe González-Acosta; Eduardo F. Balart; Gorgonio Ruiz-Campos; Hector Espinosa; Victor Hugo Cruz-Escalona; Armando Hernández-López. Diversidad y conservación de los peces de la bahía de La Paz, Baja California Sur, México. Revista Mexicana de Biodiversidad 2018, 89, 1 .

AMA Style

Adrián Felipe González-Acosta, Eduardo F. Balart, Gorgonio Ruiz-Campos, Hector Espinosa, Victor Hugo Cruz-Escalona, Armando Hernández-López. Diversidad y conservación de los peces de la bahía de La Paz, Baja California Sur, México. Revista Mexicana de Biodiversidad. 2018; 89 (3):1.

Chicago/Turabian Style

Adrián Felipe González-Acosta; Eduardo F. Balart; Gorgonio Ruiz-Campos; Hector Espinosa; Victor Hugo Cruz-Escalona; Armando Hernández-López. 2018. "Diversidad y conservación de los peces de la bahía de La Paz, Baja California Sur, México." Revista Mexicana de Biodiversidad 89, no. 3: 1.

Journal article
Published: 08 June 2018 in Ecology
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Consumer-driven nutrient recycling can have substantial effects on primary production and patterns of nutrient limitation in aquatic ecosystems by altering the rates as well as the relative supplies of the key nutrients nitrogen (N) and phosphorus (P). While variation in nutrient recycling stoichiometry has been well-studied among species, the mechanisms that explain intraspecific variation in recycling N:P are not well-understood. We examined the relative importance of potential drivers of variation in nutrient recycling by the fish Gambusia marshi among aquatic habitats in the Cuatro Ciénegas basin of Coahuila, Mexico. There, G. marshi inhabits warm thermal springs with high predation pressure as well as cooler, surface runoff-fed systems with low predation pressure. We hypothesized that variation in food consumption among these habitats would drive intraspecific differences in excretion rates and N:P ratios. Stoichiometric models predicted that temperature alone should not cause substantial variation in excretion N:P, but that further reducing consumption rates should substantially increase excretion N:P. We performed temperature and diet ration manipulation experiments in the laboratory and found strong support for model predictions. We then tested these predictions in the field by measuring nutrient recycling rates and ratios as well as body stoichiometry of fish from nine sites that vary in temperature and predation pressure. Fish from warm, high-predation sites excreted nutrients at a lower N:P ratio than fish from cool, low-predation sites, consistent with the hypothesis that reduced consumption under reduced predation pressure had stronger consequences for P retention and excretion among populations than did variation in body stoichiometry. These results highlight the utility of stoichiometric models for predicting variation in consumer-driven nutrient recycling within a phenotypically variable species.

ACS Style

Eric K. Moody; Evan W. Carson; Jessica R. Corman; Hector Espinosa‐Pérez; Jorge Ramos; John L. Sabo; James J. Elser. Consumption explains intraspecific variation in nutrient recycling stoichiometry in a desert fish. Ecology 2018, 99, 1552 -1561.

AMA Style

Eric K. Moody, Evan W. Carson, Jessica R. Corman, Hector Espinosa‐Pérez, Jorge Ramos, John L. Sabo, James J. Elser. Consumption explains intraspecific variation in nutrient recycling stoichiometry in a desert fish. Ecology. 2018; 99 (7):1552-1561.

Chicago/Turabian Style

Eric K. Moody; Evan W. Carson; Jessica R. Corman; Hector Espinosa‐Pérez; Jorge Ramos; John L. Sabo; James J. Elser. 2018. "Consumption explains intraspecific variation in nutrient recycling stoichiometry in a desert fish." Ecology 99, no. 7: 1552-1561.

Journal article
Published: 21 November 2017 in Journal of Zoological Systematics and Evolutionary Research
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We provide a review of the systematics of Herichthys by evaluating the usefulness of several mitochondrial and nuclear genetic markers together with morphological data. The nDNA next-generation sequencing ddRAD analysis together with the mtDNA cytochrome b gene provided well-resolved and well-supported phylogenies of Herichthys. On the other hand, the nDNA S7 introns have limited resolution and support and the COI barcoding analysis completely failed to recover all but one species of Herichthys as monophyletic. The COI barcoding as currently implemented is thus insufficient to distinguish clearly distinct species in the genus Herichthys that are supported by other molecular markers and by morphological characters. Based on our results, Herichthys is composed of 11 species and includes two main clades (the H. labridens and H. cyanoguttatus species groups). Herichthys bartoni is in many respects the most plesiomorphic species in the genus and has a conflicting phylogenetic position between mtDNA and nDNA markers, where the robust nDNA ddRAD data place it as a rather distant basal member of the H. labridens species group. The mtDNA of H. bartoni is on the other hand only slightly divergent from the sympatric and syntopic H. labridens, and the species thus probably have hybridized in the relatively recent past. The sympatric and syntopic Herichthys steindachneri and H. pame are supported as sister species. The Herichthys cyanoguttatus species group shows two well-separated basal species (the northernmost H. minckleyi and the southernmost H. deppii) followed by the closely related and centrally distributed species H. cyanoguttatus, H. tepehua, H. carpintis, and H. tamasopoensis whose relationships differ between analyses and show likely hybridizations between themselves and the two basal species as suggested by conflicts between DNA analyses. Several instances of introgressions/hybridizations have also been found between the two main clades of Herichthys.

ACS Style

Fabian Pérez-Miranda; Omar Mejía; Eduardo Soto-Galera; Héctor Espinosa-Pérez; Lubomír Piálek; Oldřich Říčan. Phylogeny and species diversity of the genusHerichthys(Teleostei: Cichlidae). Journal of Zoological Systematics and Evolutionary Research 2017, 56, 223 -247.

AMA Style

Fabian Pérez-Miranda, Omar Mejía, Eduardo Soto-Galera, Héctor Espinosa-Pérez, Lubomír Piálek, Oldřich Říčan. Phylogeny and species diversity of the genusHerichthys(Teleostei: Cichlidae). Journal of Zoological Systematics and Evolutionary Research. 2017; 56 (2):223-247.

Chicago/Turabian Style

Fabian Pérez-Miranda; Omar Mejía; Eduardo Soto-Galera; Héctor Espinosa-Pérez; Lubomír Piálek; Oldřich Říčan. 2017. "Phylogeny and species diversity of the genusHerichthys(Teleostei: Cichlidae)." Journal of Zoological Systematics and Evolutionary Research 56, no. 2: 223-247.

Journal article
Published: 04 September 2017 in PeerJ
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Fish diets were analyzed to evaluate the dynamic trophs of the fish community in the Churince wetland system of the Cuatro Ciénegas, where the fauna consists of nine species: endemic, native and introduced. In nine sampling events (between February 2011 and May 2014) 556 specimens of all nine species were collected. Stomach contents were analyzed and the Relative Importance Index (IRI) was calculated. The feed coefficient (Q) of the diets and the accumulated trophic diversity (Hk), as well as the amplitude of the trophic niche were evaluated. Feeding strategies in the fish community were found to be eurifagic. The main foods in general were insects, crustaceans, gastropods, plants and teleosts. According to the average linkage method, four functional trophic groups were defined, with no higher consumption species; nevertheless all were regulators, mainly invertebrates. Therefore, the chain reaction in food control was higher from top to bottom, meaning a downwards dietary control.

ACS Style

Ariana Hernández; Hector Espinosa; Valeria Souza. Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila. PeerJ 2017, 5, 1 .

AMA Style

Ariana Hernández, Hector Espinosa, Valeria Souza. Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila. PeerJ. 2017; 5 ():1.

Chicago/Turabian Style

Ariana Hernández; Hector Espinosa; Valeria Souza. 2017. "Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila." PeerJ 5, no. : 1.

Journal article
Published: 02 September 2017 in Fisheries
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ACS Style

Lawrence M. Page; Carole C. Baldwin; Hector Espinosa; Lloyd T. Findley; Carter R. Gilbert; Karsten E. Hartel; Robert N. Lea; Nicholas E. Mandrak; Juan Schmitter-Soto; H. J. Walker. Taxonomy ofGilain the Lower Colorado River Basin of Arizona and New Mexico. Fisheries 2017, 42, 456 -460.

AMA Style

Lawrence M. Page, Carole C. Baldwin, Hector Espinosa, Lloyd T. Findley, Carter R. Gilbert, Karsten E. Hartel, Robert N. Lea, Nicholas E. Mandrak, Juan Schmitter-Soto, H. J. Walker. Taxonomy ofGilain the Lower Colorado River Basin of Arizona and New Mexico. Fisheries. 2017; 42 (9):456-460.

Chicago/Turabian Style

Lawrence M. Page; Carole C. Baldwin; Hector Espinosa; Lloyd T. Findley; Carter R. Gilbert; Karsten E. Hartel; Robert N. Lea; Nicholas E. Mandrak; Juan Schmitter-Soto; H. J. Walker. 2017. "Taxonomy ofGilain the Lower Colorado River Basin of Arizona and New Mexico." Fisheries 42, no. 9: 456-460.

Journal article
Published: 15 July 2016 in Marine Biodiversity Records
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ACS Style

Eduardo Villalobos; Armando Martínez; Christian Lambarri; Hector Espinosa. New record of Zameus squamulosus (Chondrichthyes: Squaliformes: Somniosidae) in the Southern Gulf of Mexico. Marine Biodiversity Records 2016, 9, 127 .

AMA Style

Eduardo Villalobos, Armando Martínez, Christian Lambarri, Hector Espinosa. New record of Zameus squamulosus (Chondrichthyes: Squaliformes: Somniosidae) in the Southern Gulf of Mexico. Marine Biodiversity Records. 2016; 9 (1):127.

Chicago/Turabian Style

Eduardo Villalobos; Armando Martínez; Christian Lambarri; Hector Espinosa. 2016. "New record of Zameus squamulosus (Chondrichthyes: Squaliformes: Somniosidae) in the Southern Gulf of Mexico." Marine Biodiversity Records 9, no. 1: 127.

Preprint
Published: 24 June 2016
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The fish community in the Churince system includes endemic, native and introduced species. Fish diets were analysed in order to evaluate the tropho-dynamics of the community. Nine sampling campaigns were carried out between February 2011 and May 2014, and 556 specimens of nine fish species were collected. Stomach contents were analysed using the Index of Relative Importance (IRI) and the Index of Absolute Importance (RIa). Similar groups were defined for the trophic chain using the average linkage method. Feeding strategies were stenophagic in only the species Herichthys minckleyi and euryphagic in the other eight species. The main food categories found in the stomach contents of the fish community were insects, crustaceans, gastropods, plants and teleosts. Four functional groups were defined for the trophic chain, with no top consumer fish species. Despite this, the fish were observed to be regulators, mainly of invertebrates. The chain reaction in the control of food was thus greater from the top to the bottom.

ACS Style

Ariana Hernández; Hector S. Espinosa-Pérez; Valeria Souza. Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila. 2016, 1 .

AMA Style

Ariana Hernández, Hector S. Espinosa-Pérez, Valeria Souza. Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila. . 2016; ():1.

Chicago/Turabian Style

Ariana Hernández; Hector S. Espinosa-Pérez; Valeria Souza. 2016. "Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila." , no. : 1.

Preprint content
Published: 24 June 2016
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The fish community in the Churince system includes endemic, native and introduced species. Fish diets were analysed in order to evaluate the tropho-dynamics of the community. Nine sampling campaigns were carried out between February 2011 and May 2014, and 556 specimens of nine fish species were collected. Stomach contents were analysed using the Index of Relative Importance (IRI) and the Index of Absolute Importance (RIa). Similar groups were defined for the trophic chain using the average linkage method. Feeding strategies were stenophagic in only the species Herichthys minckleyi and euryphagic in the other eight species. The main food categories found in the stomach contents of the fish community were insects, crustaceans, gastropods, plants and teleosts. Four functional groups were defined for the trophic chain, with no top consumer fish species. Despite this, the fish were observed to be regulators, mainly of invertebrates. The chain reaction in the control of food was thus greater from the top to the bottom.

ACS Style

Ariana Hernández; Hector S Espinosa-Pérez; Valeria Souza. Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila. 2016, 1 .

AMA Style

Ariana Hernández, Hector S Espinosa-Pérez, Valeria Souza. Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila. . 2016; ():1.

Chicago/Turabian Style

Ariana Hernández; Hector S Espinosa-Pérez; Valeria Souza. 2016. "Trophic analysis of the fish community in the Ciénega Churince, Cuatro Ciénegas, Coahuila." , no. : 1.

Journal article
Published: 09 May 2016 in Zootaxa
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Menezes et al. (2010) show that Mugil cephalus Linnaeus, 1758 is different from Mugil liza Valenciennes 1836, the latter being the mullet found along the Atlantic coast of South America. They also suggest that individuals identified as M. cephalus from the northwest Atlantic could represent a population of M. liza in this region, since they doubt the presence of M. cephalus in waters colder than the ones of the West Indies. In order to clarify the presence of M. cephalus in the northwest Atlantic, this study compares meristic and morphometric measurements of M. cephalus and M. liza from the Gulf of Mexico with those obtained by Menezes et al. (2010) for M. liza from South America and for M. cephalus in the Mediterranean Sea. Results show that there are differences in both morphometric and meristic data between the two species. The morphometric measure that differentiates these species is the distance from the snout to the dorsal fin, which is positioned backwards in M. liza compared with M. cephalus. The body width is consistently greater in M. cephalus than M. liza. The meristic character that discriminates between both species is the number of scales in the longitudinal series that, in M. cephalus, ranges from 38 to 43 while in M. liza between 32 to 39. The information presented in this work confirms the presence of M. cephalus in the Gulf of Mexico and the sympatric presence of M. liza is established, even if its abundance is quite low.

ACS Style

Eloísa Pacheco-Almanzar; James Simons; Hector Espinosa; Xavier Chiappa-Carrara; Ana L. Ibáñez. Can the name Mugil cephalus (Pisces: Mugilidae) be used for the species occurring in the north western Atlantic? Zootaxa 2016, 4109, 381 -390.

AMA Style

Eloísa Pacheco-Almanzar, James Simons, Hector Espinosa, Xavier Chiappa-Carrara, Ana L. Ibáñez. Can the name Mugil cephalus (Pisces: Mugilidae) be used for the species occurring in the north western Atlantic? Zootaxa. 2016; 4109 (3):381-390.

Chicago/Turabian Style

Eloísa Pacheco-Almanzar; James Simons; Hector Espinosa; Xavier Chiappa-Carrara; Ana L. Ibáñez. 2016. "Can the name Mugil cephalus (Pisces: Mugilidae) be used for the species occurring in the north western Atlantic?" Zootaxa 4109, no. 3: 381-390.

Journal article
Published: 01 March 2016 in The Southwestern Naturalist
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We present evidence for the overlap of two species of clingfishes, mountain clingfish (Gobiesox fluviatilis) and Mexican clingfish (Gobiesox mexicanus), in the Cuitzmala River, state of Jalisco, western Mexico. In addition to documenting novel sites where these species can be found, we present a new maximum standard length for G. fluviatilis, 137.8 mm. Morphometric and meristic variation in diagnostic characters for these species is higher than previously reported. We recommend a revision of diagnostic characters for Mexican freshwater clingfishes to better understand the systematics and distribution of species in the group. Resumen Presentamos información acerca de la coexistencia de dos cucharitas, Gobiesox fluviatilis y G. mexicanus, en el río Cuitzmala, en el Estado de Jalisco, en el oeste de México. Además de documentar nuevos sitios donde las especies pueden ser encontradas, reportamos una nueva longitud estándar máxima para G. fluviatilis: 137.8 mm. La variabilidad merística y morfométrica en características diagnósticas es mayor que lo que se había reportado anteriormente. Recomendamos una revisión de las características diagnósticas de las cucharitas mexicanas de agua dulce para entender mejor la sistemática y distribución de las especies en el grupo.

ACS Style

Hector Espinosa. Overlap of mountain clingfish ( Gobiesox fluviatilis ) and Mexican clingfish ( Gobiesox mexicanus ) in the Cuitzmala River, Jalisco, Mexico. The Southwestern Naturalist 2016, 61, 83 -87.

AMA Style

Hector Espinosa. Overlap of mountain clingfish ( Gobiesox fluviatilis ) and Mexican clingfish ( Gobiesox mexicanus ) in the Cuitzmala River, Jalisco, Mexico. The Southwestern Naturalist. 2016; 61 (1):83-87.

Chicago/Turabian Style

Hector Espinosa. 2016. "Overlap of mountain clingfish ( Gobiesox fluviatilis ) and Mexican clingfish ( Gobiesox mexicanus ) in the Cuitzmala River, Jalisco, Mexico." The Southwestern Naturalist 61, no. 1: 83-87.

Journal article
Published: 06 September 2015 in Biological Journal of the Linnean Society
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Superfetation is the ability of females to simultaneously carry multiple broods of embryos, with each brood at a different developmental stage. Matrotrophy is the post-fertilization maternal provisioning of nutrients to developing embryos throughout gestation. Several studies have demonstrated that, in viviparous fishes, superfetation and matrotrophy have evolved in a correlated way, such that species capable of bearing several simultaneous broods also exhibit advanced degrees of post-fertilization provisioning. The adaptive value of the concurrent presence of both reproductive modes may be associated with the production of larger newborns, which in turn may result in enhanced offspring fitness. In this study, we tested two hypotheses: (1) species with superfetation and moderate or extensive matrotrophy give birth to larger offspring compared to species without superfetation or matrotrophy; (2) species with higher degrees of superfetation and matrotrophy (i.e. more simultaneous broods and increased amounts of post-fertilization provisioning) give birth to larger offspring compared to species with relatively low degrees of superfetation and matrotrophy (i.e. fewer simultaneous broods and lesser amounts of post-fertilization provisioning). Using different phylogenetic comparative methods and data on 44 species of viviparous fishes of the family Poeciliidae, we found a lack of association between offspring size and the combination of superfetation and matrotrophy. Therefore, the concurrent presence of superfetation and moderate or extensive matrotrophy has not facilitated the evolution of larger offspring. In fact, these traits have evolved differently. Superfetation and matrotrophy have accumulated gradual changes that largely can be explained by Brownian motion, whereas offspring size has evolved fluidly, experiencing changes that likely resulted from selective responses to the local conditions.

ACS Style

Claudia Olivera-Tlahuel; Alison G. Ossip-Klein; Hector Espinosa; J. Jaime Zúñiga-Vega. Have superfetation and matrotrophy facilitated the evolution of larger offspring in poeciliid fishes? Biological Journal of the Linnean Society 2015, 116, 787 -804.

AMA Style

Claudia Olivera-Tlahuel, Alison G. Ossip-Klein, Hector Espinosa, J. Jaime Zúñiga-Vega. Have superfetation and matrotrophy facilitated the evolution of larger offspring in poeciliid fishes? Biological Journal of the Linnean Society. 2015; 116 (4):787-804.

Chicago/Turabian Style

Claudia Olivera-Tlahuel; Alison G. Ossip-Klein; Hector Espinosa; J. Jaime Zúñiga-Vega. 2015. "Have superfetation and matrotrophy facilitated the evolution of larger offspring in poeciliid fishes?" Biological Journal of the Linnean Society 116, no. 4: 787-804.

Journal article
Published: 01 August 2015 in Western North American Naturalist
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. The Cuatro Ciénegas killifish Lucania interioris is an endemic fundulid in the Chihuahuan Desert valley of Cuatro Ciénegas, Coahuila, México. It occurs in 3 major drainage regions of the basin and is limited primarily to naturally fragmented and physicochemically severe habitats of the valley floor. We assessed mitochondrial DNA variation and population genetic structure in L. interioris from 8 populations representative of the entire geographic range of this species, including its distribution within and among major drainage regions (western, central, and southeastern) of the valley. Five populations were invariant, including both populations in the western region (Haplotype A only), whereas 2 haplotypes were observed in each of the remaining populations. Haplotype diversity was low in the central basin (HD = 0.10 and HD = 0.19) and moderate in the southeastern basin (HD = 0.52). Low levels of divergence among haplotypes (0.3%–0.9%), together with high levels of genetic differentiation among regions (FCT = 0.847, P < 0.001), indicate complete isolation among major drainage regions. These results agree with previous documentation of morphological differentiation between populations from the western and central basins. Populations in the southeastern basin are divergent genetically and, therefore, also may exhibit morphological distinction. Resumen. El pez Lucania interioris del valle de Cuatro Ciénegas en Coahuila, México es endémico al valle. La especie ocurre en 3 cuencas principales dentro del valle donde está limitado a sistemas fragmentados y extremos fisicoquímicamente. Determinamos la diversidad mitocondrial y la estructura genética de 8 poblaciones muestreadas en todo el rango de distribución de la especie. Cinco poblaciones no presentaron diversidad genética, incluyendo ambos poblaciones del Oeste (solo Haplotipo A); 2 haplotipos mas fueron observados en las otras poblaciones. Entre las poblaciones geneticamente mas diversas, la diversidad fue mas baja en la parte central del valle (HD = 0.10 y HD = 0.19) y moderadamente diversa en la zona Sudeste (HD = 0.52). A pesar de que la divergencia entre haplotipos es baja (0.3%–0.9%), la estructura genética es significativa entre regiones (FCT = 0.847, P < 0.001) indicaron que el aislamiento entre las principales regiones de drenaje se ha completado, pero no antiguo. Estos resultados concuerdan con trabajos morfológicos previos donde se aprecian diferencias visibles entre las poblaciones del Oeste y parte Central del valle sugiriendo que la variación morfológica es mayor que lo que se había reportado.

ACS Style

Evan W. Carson; Valeria Souza; Hector Espinosa; Thomas F. Turner. Mitochondrial DNA Diversity and Phylogeography ofLucania interiorisInform Biodiversity Conservation in the Cuatro Ciénegas Basin, México. Western North American Naturalist 2015, 75, 200 -208.

AMA Style

Evan W. Carson, Valeria Souza, Hector Espinosa, Thomas F. Turner. Mitochondrial DNA Diversity and Phylogeography ofLucania interiorisInform Biodiversity Conservation in the Cuatro Ciénegas Basin, México. Western North American Naturalist. 2015; 75 (2):200-208.

Chicago/Turabian Style

Evan W. Carson; Valeria Souza; Hector Espinosa; Thomas F. Turner. 2015. "Mitochondrial DNA Diversity and Phylogeography ofLucania interiorisInform Biodiversity Conservation in the Cuatro Ciénegas Basin, México." Western North American Naturalist 75, no. 2: 200-208.

Journal article
Published: 10 April 2015 in Check List
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This paper presents a list of the exotic fish species introduced in Mexican aquatic systems. This list is the result of the systematized information contained in several databases of ichthyological collections around the world and different publications. A total of 104 species were found, distributed in 19 families and 51 genera. The most species-rich were Cyprinidae with 22 species, Poeciliidae (19 species), Cichlidae (15 species) and Centrarchidae (13 species). A map and an electronic database were created based on the knowledge of the species, showing the known introductions of exotic fishes in the country. The information was obtained from a database stored in the Colección Nacional de Peces IBUNAM, which can be accessed online. This study has a high importance for the knowledge of the exotic fish fauna of Mexico and its current status.

ACS Style

Héctor Espinosa Pérez; Montserrat Ramírez H.. Exotic and invasive fishes in Mexico. Check List 2015, 11, 1627 .

AMA Style

Héctor Espinosa Pérez, Montserrat Ramírez H.. Exotic and invasive fishes in Mexico. Check List. 2015; 11 (3):1627.

Chicago/Turabian Style

Héctor Espinosa Pérez; Montserrat Ramírez H.. 2015. "Exotic and invasive fishes in Mexico." Check List 11, no. 3: 1627.

Journal article
Published: 27 February 2015 in Marine Biodiversity
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No data about trichodinid species parasitizing marine fishes have been published in Mexico. Here, we provide the first records of Trichodina rectuncinata (Figs. 1, 2, 3, and 4) on the gills of the blackstripe clingfish Tomicodon myersi (Gobiesocidae) from Ixtapa-Zihuatanejo in the Mexican Central Pacific (17°39’N, 101°36’W), and on the network triplefin Enneanectes reticulatus (Tripterygiidae) from the San Carlos Bay in the Gulf of California (27° 56’N, 111° 05’W). This ciliate species has been frequently recorded in marine fishes around the world (Xu et al. 2001); the only previous record in the Americas was provided by Lom 1970, who reported this species from the Pacific coast of Canada.Fig. 1

ACS Style

R. Aguilar-Aguilar; A. G. Islas-Ortega; O. Lagunas-Calvo; N. Lopez; Hector Espinosa. New host-parasite relationships for Trichodina rectuncinata (Ciliophora: Trichodinidae) on the gills of marine fishes from Mexico. Marine Biodiversity 2015, 46, 3 -4.

AMA Style

R. Aguilar-Aguilar, A. G. Islas-Ortega, O. Lagunas-Calvo, N. Lopez, Hector Espinosa. New host-parasite relationships for Trichodina rectuncinata (Ciliophora: Trichodinidae) on the gills of marine fishes from Mexico. Marine Biodiversity. 2015; 46 (1):3-4.

Chicago/Turabian Style

R. Aguilar-Aguilar; A. G. Islas-Ortega; O. Lagunas-Calvo; N. Lopez; Hector Espinosa. 2015. "New host-parasite relationships for Trichodina rectuncinata (Ciliophora: Trichodinidae) on the gills of marine fishes from Mexico." Marine Biodiversity 46, no. 1: 3-4.

Journal article
Published: 01 January 2015 in DNA Barcodes
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One of the problems that arose from the meetings of the Barcode in Mexico project was the urgency of having a method in which Mexican authorities could trust for detecting shark finning. This study examined DNA barcoding as a method to identify 14 dried shark fins confiscated by the Mexican Government in two exportation shipments in Mazatlán and Manzanillo ports. Fins were DNA barcoded using the COI mitochondrial gene and provided matching sequences of six species: Prionace glauca, Carcharhinus falciformis, Carcharhinus limbatus, Alopias pelagicus, Mustelus henlei and Rhizoprionodon longurio. There is no information on DNA barcoding sharkfin trade in the Mexican Pacific and this is the first group effort with Mexican Government Agencies for the conservation of sharks.

ACS Style

Héctor Espinosa; Christian Lambarri; Armando Martínez; Andrea Jiménez. A case study of the forensic application of DNA Barcoding to sharkfin identification in the Mexican Pacific. DNA Barcodes 2015, 3, 94 -97.

AMA Style

Héctor Espinosa, Christian Lambarri, Armando Martínez, Andrea Jiménez. A case study of the forensic application of DNA Barcoding to sharkfin identification in the Mexican Pacific. DNA Barcodes. 2015; 3 (1):94-97.

Chicago/Turabian Style

Héctor Espinosa; Christian Lambarri; Armando Martínez; Andrea Jiménez. 2015. "A case study of the forensic application of DNA Barcoding to sharkfin identification in the Mexican Pacific." DNA Barcodes 3, no. 1: 94-97.

Journal article
Published: 01 January 2015 in DNA Barcodes
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The Atlantic Cod Gadus morhua is fished in Northern Atlantic and Arctic waters. In Mexico cod is imported from Norway and the United States, and is traditionally eaten at Christmas and Easter. In Mexico City several stores sell dry-salted cod, but due to the high price of the imported Atlantic Cod, other fish species are sold. In this project we examined six samples of dried-salted fish from different stores and used DNA barcoding of the COI gene to corroborate the identity of the product sold as Atlantic Cod. Barcoding revealed that only two of the six samples (33%) were Atlantic cod, with two being Ling, one Alaska Pollock, and one Blue Shark. The high rate of mislabeling (67%) is a major concern. It is especially worrying that Blue Shark is being sold as Atlantic cod, since the Blue Shark is listed as a near-threatened species by the IUCN. We must be aware of the damages that overexploitation and uninformed consumption cause to cod and shark populations. There needs to be stricter policing of seafood product labeling in México.

ACS Style

Christian Lambarri; Héctor Espinosa; Armando Martínez; Ariana Hernández. Cods for sale Do we know what we are buying? DNA Barcodes 2015, 3, 1 .

AMA Style

Christian Lambarri, Héctor Espinosa, Armando Martínez, Ariana Hernández. Cods for sale Do we know what we are buying? DNA Barcodes. 2015; 3 (1):1.

Chicago/Turabian Style

Christian Lambarri; Héctor Espinosa; Armando Martínez; Ariana Hernández. 2015. "Cods for sale Do we know what we are buying?" DNA Barcodes 3, no. 1: 1.

Journal article
Published: 02 December 2014 in Check List
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We present the first record of the fish Leptophilypnus guatemalensis Thacker & Pezold, 2006 (Gobiiformes: Eleotridae) in the state of Chiapas, México, within the Grijalva–Usumacinta basin. Morphological and morphometrical data of 20 specimens from three localities are given.

ACS Style

Hector Espinosa-Pérez; Armando Martínez C.; Daniel Sepúlveda J.. Leptophilypnus guatemalensis Thacker & Pezold, 2006 (Gobiiformes: Eleotridae): First record in México. Check List 2014, 10, 1535 .

AMA Style

Hector Espinosa-Pérez, Armando Martínez C., Daniel Sepúlveda J.. Leptophilypnus guatemalensis Thacker & Pezold, 2006 (Gobiiformes: Eleotridae): First record in México. Check List. 2014; 10 (6):1535.

Chicago/Turabian Style

Hector Espinosa-Pérez; Armando Martínez C.; Daniel Sepúlveda J.. 2014. "Leptophilypnus guatemalensis Thacker & Pezold, 2006 (Gobiiformes: Eleotridae): First record in México." Check List 10, no. 6: 1535.