Estructura de tallas, madurez gonádica y alimentación del pez Diapterus rhombeus (Gerreidae) en el sistema fluvio-deltaico Pom-Atasta, Campeche, México

Abstract

Size structure, gonadic development and diet of the fish Diapterus rhombeus (Gerreidae) in the Pom-Atasta fluvial-deltaic system, Campeche, Mexico. The fish Diapterus rhombeus was studied during an annual cycle from 1992 to 1993 in the fluvial-deltaic Pom-Atasta system associated with Terminos Lagoon, Campeche, Mexico. It is a dominant species in the system, based on its numeric abundance, weight, high frequency and wide distribution. A total of 745 individuals were obtained, with a weigth of 2 890.2 g and length ranging from 3.0 to 16.7 cm. The annual variation of the allometric coefficient b was from 2.71 to 3.345. The condition factor varied from 0.711 to 0.934. The statistical analysis shows significant differences (p< 0.05) between the seasons of the year and the habitats of the system for the weight, the longitude and the condition factor K, which reflects the space-temporal utilization of the system for the species. The population present at Pom-Atasta, consists mainly by juvenile and few preadults individuals in gonadal stages I, II, and III, and more females than males were recorded. This species utilizes the system as a nursery area, growth and feeding area. It has a varied trophic spectrum, and consumes at least eight different groups. Its principal food items are undetermined organic matter, foraminifers, ostracods and tanaidaceans. It is a first order consumer. The Pom-Atasta system is located in a zone of intense fishing and oil activity, so it is important to advance in the knowledge of its fishing resources.

Feeding habits ofEucinostomus entomelasandMicropogonias megalopsin Las Guasimas lagoon Gulf of California

“…In spite of the prey digestion stage, the preferential prey item found in E. entomelas stomachs was polychaetes (%IRI = 46.7), which agrees with that reported by Varela (1990), Arenas-Granados & Acero (1992) and Aguirre-León & Díaz-Ruiz (2004) with respect to the predator pressure that other components of the family Gerreidae place upon polychaetes. Eucinostomus entomelas also consumed six other taxonomic groups (Rhodophyta, Copepoda, Echinodermata, Mollusca, Crustacea and Chordata), of which only four (algae, copepods, polychaetes and crustaceans) have been found in stomach contents of other Gerreidae such as Eugerres plumier Cuvier 1830 (Aguirre-León & Díaz-Ruiz, 2000) and Diapterus rhombeus Cuvier 1829 (Aguirre-León & Díaz-Ruiz, 2004).…”

Seasonal and environmental influences on recruitment patterns and habitat usage among resident and transient fishes in a World Heritage Site subtropical estuary

“…While reproduction is likely to be a key influence explaining the spatio‐temporal occurrence of many species in the PEC (Spach et al ., , ; Barletta et al ., ), other species observed here also apparently use the area for more divergent needs. For example, juveniles of the demersal transient D. rhombeus typically utilize estuaries to grow and mature and then return to the sea to spawn (Araújo et al ., ; Bezerra et al ., ; Aguirre‐León & Díaz‐Ruiz, ). Other species are probably also influenced by broader patterns.…”

Variación espacio-temporal de la estructura ecológica de la comunidad de peces en la Laguna del Ostión, Veracruz, México

“…En comparación, Bozada & Chávez (1986) reportaron a D. rhombeus como la más abundante y con menor proporción a E. melanopterus y Brevoortia patronus. Estudios ictiológicos en otros sistemas lagunares del golfo de México (Aguirre-León et al 2006;Aguirre-León et al 2010;Arceo-Carranza et al 2013) han registrado a las especies previamente mencionadas o afines como dominantes o abundantes en diferentes magnitudes.…”