The relation between length (L) and weight (W) was estimated for 33 species representing 14 families of fishes from El Conchalito mangrove swamp, Gulf California (Mexico). parameter b by nonlinear least squares data, ranged 1.41 to 3.68. Length - parameters can be used several biological or fishery purposes enable the derivation estimates given a value vice versa.

The checklist presented in this study includes the latest taxonomic and systematic modifications updates (early 2018) for Chondrichthyes that inhabit Exclusive Economic Zone (EEZ) of Mexico. list is based on a literature review field-specific books, scientific publications database information from collections museums worldwide available online such as, Ocean Biogeographic Information System (OBIS), Global Biodiversity Facility (GBIF), Encyclopedia Life (EOL), iSpecies, FishBase National...

Bahía Magdalena, Baja California Sur (Mexico), is an interesting place where, because of its geographic location and environmental characteristics, a high biodiversity found. In spite marine resources economic importance, few reports or papers dealing with the bay’s have been published. To date comprehensive check-list fishes Magdalena has not present work integrated record ichthyofauna given; list includes those species caught in six-year survey, which are catalogued biological collection...

Length–weight and length–length relationships were estimated for 10 freshwater, estuarine marine fish species caught at the mouths of coastal sterams from northwestern Baja California (Mexico). The parameter b by nonlinear least squares weight length data, ranged 2.50 to 3.61. Size conversions (calculated total standard length) can be used in fishery understanding several aspects population dynamics.

All species of sawfish are listed by the International Union for Conservation Nature (IUCN) as endangered or critically endangered. In fact, smalltooth Pristis pectinata, and largetooth pristis, have been declared to be regionally locally extinct from US Atlantic coast Gulf California, Mexico, respectively, likely due overfishing. However, here we dispute these claims illustrating how lack existence a given within region can misconstrued evidence extinction.

Stock discrimination in fishes is important for fisheries management. Morphometric analysis has been a viable approach when different structures (overall body, otoliths, and scales) are used. However, cases where single source of information may already differentiate among stocks, conclusions be obtained using sources information. These have to considered because they could lead management plans. Using geometric morphometrics, data was analyzed regarding the body otolith shape Pacific...

The urohyal bone, located in the central part of mandibular skeleton, plays an important role mouth opening-closing mechanism fish, and is considered a synapomorphy teleostean fish. Morphology bone six species Gerreidae (Diapterus brevirostris, D. auratus, Eugerres lineatus, E. plumieri, Eucinostomus entomelas Gerres cinereus) from Pacific Atlantic coasts México was compared, using size shape measurements. main goal study to explore effectiveness measurements discriminating species....

The first check-list of fishes from La Paz Bay, Baja California Sur (Mexico), is presented. A total 390 species, belonging to 251 genera and 106 families, are reported. list includes species collected in the area between 1981 1986, that were sighted (and positively identified) reported literature. specimens catalogued deposited ichthyological collection CICIMAR, IPN, Paz, B.C.S.

The first check-list of fishes from Bahía Concepción, Baja California Sur, Mexico, is presented. list includes 146 species, belonging to 109 genera and 58 families. These specimens were collected between January 1985 December 1989 (except 1988). Only those species that are included in this (those observed not). They catalogued deposited the ichthyological collection Centro Interdisciplinario de Ciencias Marinas Instituto Politécnico Nacional (CICIMAR-IPN) La Paz, B.C.S., Mexico.

Background.Although the species of family Gerreidae have been subjected to many studies, their taxonomy at specific-and sometimes generic levels is still confusing.To contribute clarification Mexican Pacific mojarras, morphology sagittal otoliths among six mojarras (Diapterus brevirostris, Eugerres lineatus, Eucinostomus dowii, E entomelas, E. currani, and Gerres cinereus) was compared using size shape descriptors.Otolith has long known be species-specific but this not tested in...

The fish belonging to Gerreidae are common representatives of the coastal ichthyofauna tropics and subtropics world. genus Diapterus has a neotropical distribution currently includes four species: two in Atlantic Ocean [Irish mojarra D. auratus Ranzani 1842 rhombic rhombeus (Cuvier 1829)] Pacific [short‐beaked brevirostris (Sauvage 1879) golden aureolus (Jordan & Gilbert 1882)]. This uncertain taxonomy based on remarkable dissimilar morphology . We evaluated phylogeny with statistical...

LA BAHÍA DE BANDERAS UBICADA EN EL PACÍFICO CENTRAL MEXICANO ALBERGA UNA GRAN RIQUEZA ÍCTICA CUAL SE MENCIONA POR PRIMERA VEZ ESTE ELENCO SISTEMÁTICO, DONDE INCLUYEN 210 ESPECIES, 145 GÉNEROS Y 74 FAMILIAS. LISTA INTEGRA CON REPRESENTANTES 205 ESPECIES CAPTURADOS DURANTE RECOLECTAS REALIZADAS ENTRE 1997 A 1998, ASÍ COMO OTRAS CINCO OBSERVADAS E IDENTIFICADAS MODO POSITIVO, AUNQUE NO RECOLECTADAS. LOS RESULTADOS INDICAN UN NÚMERO BASTANTE ALTO AFINIDAD TROPICAL (117) RESPECTO LAS TEMPLADAS...

Background. In taxonomic studies of fish, the use preserved samples has been a common practice. Under framework morphometrics, effect preservation techniques on body shape is rarely taken into account. Changes during can cause errors in results, which may eventually lead to wrong conclusions. To explore traditional procedure, we quantified changes and size golden mojarra, Diapterus aureolus (Jordan et Gilbert, 1882), using geometric morphometrics. Materials methods. Fish fresh were...

The taxonomic status of butterfly rays within the genus Gymnura remains a subject ongoing debate among researchers. Some authors recognize up to five valid species for Americas, while others considered several be synonyms, which has posed persistent challenge. We aimed shed light on this complexity by employing molecular operational units (MOTUs) based mitochondrial gene cytochrome oxidase I (COI). Genetic sequences were obtained from fresh muscle tissue collected in marine ecoregions...