Introducción: La familia Profundulidae es un linaje de peces agua dulce, con una distribución geográfica muy limitada que se extiende desde el sur México hasta Centroamérica, integrada por dos géneros Profundulus y Tlaloc; este último, tiene solamente cuatro especies; sin embargo, los estudios basados en análisis caracteres osteológicos son escasos para esta peces. Objetivo: Se describe la anatomía del complejo caudal elementos columna vertebral todas las especies integran género Tlaloc....

The Grijalva River basin is one of the largest hydrological systems in Central America. Despite its importance, an inventory ichthyofauna remains incomplete. We provide a systematic checklist fishes recorded based on surveys performed from 2002 to 2015. list includes 92 species, belonging 13 orders, 25 families and 50 genera, which 83 species are native nine exotics. This three range expansions (Profundulus hildebrandi, Poecilia sphenops Paraneetroplus hartwegi). Fifteen endemic basin. most...

An updated checklist of the distribution fishes that inhabit continental waters Mexican state Chiapas is presented. The was compartmentalized into 12 hydrological regions for purpose understanding fish fauna across a with large physiographic variance. ichthyofauna represented by 311 species distributed in two classes, 26 orders, 73 families, and 182 genera, including exotic species. families highest number were Cichlidae, Poeciliidae, Sciaenidae, Carangidae, Ariidae, Gobiidae, Haemulidae....

Composition and abundance of the ichthyofauna in estuarine coastal lagoon systems South Pacific Mexico have been scarcely studied. In particular, there is a lack information on how environmental variables determine spatio-temporal structure fish assemblages those habitats. this study, fishes were sampled by drop net during twelve months (May 2004 - April 2005) 22 sites distributed along Carretas-Pereyra lagoon, located Biosphere Reserve La Encrucijada, Chiapas, Mexico. We recorded 11 797...

The effect of the preserver on length-weight relationship and condition factor were estimated using 50 specimens Tlaloc labialis; a small stream fish from Grijalva River basin, México. They measured at different stages preservation: freshly collected, fixed in 10% formalin preserved 70% ethanol for over 2 years period. All decreased weight factor, with very significant differences compared to fresh material. value coefficient (b) increased stabilized second month preservation ethanol.

A systematic checklist of fishes in La Encrucijada Biosphere Reserve (REBIEN) was documented, during the period from 2004 to 2009. The list is composed by 153 species, included two classes, 20 orders, 52 families and 107 genera. total nine are added continental environments Chiapas, four registered first time estuarine-lagoon México (Cathorops cf. fuerthii, Trichiurus nitens, Guavina micropus Gobionellus liolepis), last species extended their range distribution Mexican Pacific; also...

Abstract 1. Profundulus hildebrandi , the San Cristóbal pupfish, is a small cyprinodontiform fish endemic to closed basin of de Las Casas, fast‐growing city in highland Chiapas, Mexico. This study constitutes first population this endangered taxon. 2. In order judge its conservation status, distribution and habitat were described, size was estimated through capture–recapture technique. To extent possible, present conditions compared with historic information, mainly old maps photographs. 3....

Mangrove forests of Mexico have been threatened by the effects anthropogenic activities during last decades, mostly related to aquaculture, agriculture, livestock and urban development. Genetic diversity fine-scale genetic structure two generations black mangrove Avicennia germinans (L.) Stearn were investigated in perturbed preserved sites from three lagoon systems Sinaloa, Mexico. overall similar between sites. However, lower levels spatial observed younger (sapling) generations. We...

Fish assemblages change significantly with physical and chemical characteristics of water; however, their response to the variability geomorphic habitats has been rarely evaluated in lagoon-estuarine one these systems Mexican Pacific. Spatio-temporal variation fish assemblage structure was assessed for three habitats: lagoon, estuarine, channel inlet. The hypothesis that sheltered areas support comparatively higher richness abundance species, more small-sized specimens than most exposed...

Abstract Until recently, the genus Profundulus was classified in two subgenera, and Tlaloc, sole members of family Profundulidae. Newly discovered molecular data have been used to justify elevation these subgenera genera. Yet morphological analyses diagnose genera are lacking. The aim this study is provide a generic diagnosis taxonomic key species within Profundulidae based on morphology. Tlaloc diagnosed basis five unique characters, among which prominent oval-shaped mesethmoid, exceeding...

Length–weight relationships were estimated for 24 species belonging to 16 families of fishes, representing a total 15 312 measured fish, from the Carretas-Pereyra lagoon, Chiapas, Mexico. Significant length–weight found all species. For 13 species, are published first time.

Profundulus balsanus was described by Ahl in 1935 and later placed synonymy with P. punctatus. Recent molecular studies have demonstrated that specimens identified as belong to a distinct taxon. Herein we used combination of morphometric, meristic, coloration osteological data order demonstrate the distinctiveness balsanus. Additionally, reconstruct phylogeny place systematic context. belongs punctatus clade within genus Profundulus. It can be distinguished from oaxacae based on scale count...

El céstodo Asiático, Bothriocephalus acheilognathi, es considerado como uno de los helmintos más peligrosos para peces cultivo, y un riesgo potencial las poblaciones silvestres en todo el mundo. La patología que causa grave, principalmente larvas juveniles peces. En este trabajo registramos la presencia B. acheilognathi pez endémico Chiapas amenazado extinción, Profundulus hildebrandi, cuenca endorreica San Cristóbal Las Casas, Chiapas, México. fue registrado 10 11 localidades muestreadas,...

A checklist of fishes recorded from Mar Muerto, La Joya-Buenavista, and Los Patos-Solo Dios lagoon-estuarine systems, northeastern Gulf Tehuantepec, Mexico is presented. Fish samples were collected through 34 stations using several kinds fishing gear, between April 2007 May 2016. The includes 2 classes, 19 orders, 52 families, 87 genera, 120 species. best-represented families are Carangidae (9 species), Gerreidae (7), Engraulidae (6). Muerto system had 89 species, followed by Joya-Buenavista...

Vieja hartwegi was described by Taylor and Miller in 1980 based on 45 juvenile sub-adult specimens, but this species shows an enormous variation coloration patterns during ontogenic development between individuals. Additionally, morphological data have demonstrated the existence of two forms V. hartwegi: typical morph a moderately deep to slightly elongated body shape with midlateral band, rheophilic lack band. Herein we redescribe adding adults individuals from broad geographic ranges, as...

The Middle American killifish genus Profundulus occurs in most Pacific and Atlantic drainages from the Mexican state of Guerrero to Chamelecón River Honduras, with highest species diversity southern Mexico. In this study, we describe a new member genus, parentiae, species, Oaxaca. It is distinguished P. guatemalensis kreiseri by having rows dots on sides body. can be oaxacae 33 lateral scales, versus 29–31 oaxacae. balsanus, oaxacae, mixtlanensis presence long epiotic processes that extend...

Length-weight relationships were estimated for 32 species belonging to 11 fish families from the Grijalva River, México. For 24 of species, length-weight are published first time.

We present a new record of the endemic fish Xiphophorus clemenciae Álvarez, 1959 for Grijalva RiverBasin, Chiapas, Mexico. This is first found off Coatzacoalcos River Basin in Oaxaca and Veracruz. Dueto their widespread distribution high abundance, it will be necessary to apply Method Evaluation RiskExtinction Mexican Wild Species (MER) update its status on Law Nom-059-Semarnat-2010.

Determinamos la composición, abundancia y uso del espacio de avifauna durante dos estaciones climáticas (estiaje lluvias)en tres paisajes diferentes laguna Mar Muerto, ubicada entre los estados Oaxaca Chiapas, México. Registramos un totalde 40 especies aves acuáticas semiacuáticas. Las familias con mayor número fueron Ardeidae Scolopacidae(nueve cada una) seguida por Anatidae Laridae (con cuatro una). una riqueza mesesde lluvia (33 especies) menor en meses estiaje (29 especies). La...

Se presenta el inventario de peces la Reserva Biosfera Selva El Ocote y presa Nezahualcóyotl (Malpaso), incluyendo río Totopac en Chiapas, México. material se recolectó 14 muestreos realizados 83 puntos entre marzo 2007 septiembre 2009; además, incluyen4 campañas adicionales 2014; total, recolectaron 22,034 ejemplares. elenco sistemático está representado por 47 especies contenidas 30 géneros, 16 familias 10 órdenes. Las más representativas fueron Cichlidae Poeciliidae con 11 especies,...

We analyzed the local variation of fish assemblages in four coastal lagoon systems surrounded by mangroves, draining into Gulf Tehuantepec (Pacific versant Mexico), and determined spatial patterns alpha, beta, gamma diversity. Fish were sampled between 2004 2016 at 63 sites using cast nets. The collected data supplemented with information obtained from published works for three other lagoons regional analysis. Local richness was high (89 species a total 19,017 specimens systems). Locally,...