Lista comentada de la ictiofauna del estuario del río Mulegé, golfo de California, México

Abstract

ResumenEl río Mulegé constituye uno de los 2 únicos ecosistemas estuarinos de la vertiente occidental del golfo de California. Debido a la escasez de estudios ícticos en este ecosistema, en este trabajo se realizó un inventario de su ictiofauna sustentado con reportes en literatura científica, registros de colecciones ictiológicas y muestreos recientes. Asimismo, con base en la presencia de las especies, se analizó la afinidad zoogeográfica y su estado de conservación biológica. El inventario incluye 2 clases, 8 órdenes, 22 familias, 38 géneros y 47 especies, con predominio de la clase Actinopterygii (96.5%), el orden Perciformes (12 familias, 25 géneros y 33 especies), y las familias Carangidae (3 géneros y 5 species) y Gerreidae (4 géneros y 5 especies). La mayor afinidad zoogeográfica es con la provincia de Cortés (83%). Destaca la presencia del gobio endémico Barbulifer pantherinus y 2 especies exóticas (Poecilia reticulata y Coptodon zillii). La mayoría de las especies (78.7%) correspondió a la categoría de preocupación menor

Linking Habitat and Associated Abiotic Conditions to Predict Fish Hotspots Distribution Areas within La Paz Bay: Evaluating Marine Conservation Areas

“…La Paz Bay (Figure 1) consists of a mosaic of coastal habitat types; to the south of the study area is a coastal lagoon that is protected from currents by a sandbar and has areas of dunes and sandy beaches. In the interior of the lagoon, there are vast areas of tidal flats and silt-sandy beaches coupled with areas of mangroves used as nursery habitat for a diverse ichthyofauna [28]. The geomorphology of La Paz lagoon represents a depression with fine-textured sediments (silts and very fine sands) mainly of terrigenous origin and siliciclastic composition, made up of fragments of volcanic rock, quartz-feldspars, and heavy minerals of granitic rocks that come from the discharges from adjacent basins [29].…”

“…A database with the species and the location of individuals within the study area was integrated into a geographic information system (ArcGIS 10.3) from specialized literature. The main sources of fish data used were Galván-Piña et al [25], González-Acosta et al [28], Abitia-Cárdenas et al [35], Zayas-Álvarez [47], Balart et al [48], and López-Rasgado et al [49]. Likewise, the database maintained at the Instituto Politécnico Nacional (http://coleccion.cicimar.ipn.mx/, accessed on 28 December 2019) and additional records from the Global Biodiversity Information Facility [50] were incorporated.…”

“…It is recognized that fish are dynamic and that the different stages in their biological cycles exhibit different behavioral responses and distribution patterns relative to habitat type and abiotic conditions. For example, in the adult stage many fish species move to different areas to feed, reproduce, and find spawning or refuge areas [28]. The proposed models were constructed using only adult specimens without considering the ontogenetic-ecological roles or functions; therefore, the modeled areas are not specific for a particular role/function but a general occurrence that includes all the possibilities of the mature stage.…”

Relaciones Peso-Longitud Y Longitud Patrón-Longitud Total Para 12 Especies De Peces De Un Ecosistema Estuarino Del Golfo De California, México

“…The western coast of the Gulf of California (GC) is characterized by a scarcity of rivers draining into the gulf, only two of them (Colorado and Mulege), forming estuaries in the upper and middle gulf regions ( González-Castro-Aguirre et al, 1995;Acosta et al, 2021).…”

“…Estuary ecosystems from northwestern Mexico such as that of Mulege River have not been enough studied. The fish fauna reported for this estuary is composed by 47 species, 38 genera and 22 families (Ruiz-Campos , 2003;González-Acosta et et al al., 2021). However, information on LL (standard length -total length) and LW (length -weight) relationships for the fish species from the Mulege estuary is not yet available, so that the generation of this type of information will be of usefulness to estimate different aspects on fish population dynamics (e. g., the standing stock biomass, ontogenetic changes, growth rates and age structure) and to predict the mean fish biomass of this ecosystem (e, g., Froese, 2006).…”