Reproducción, distribución y abundancia del pez Pseudupeneus grandisquamis (Perciformes: Mullidae), en el Golfo de Tehuantepec, México

Abstract

Reproduction, distribution and abundance of the fish Pseudupeneus grandisquamis (Perciformes: Mullidae), in the Gulf of Tehuantepec, Mexico. As result of its biological and ecological strategies, Pseudupeneus grandisquamis is a dominant species in the demersal community of the Gulf of Tehuantepec, Mexico. Our main objective was to understand these strategies with respect to distribution, abundance and reproduction. We analyzed 5 175 individuals representing partial collections from five oceanographic expeditions between 1989 and 1990. It is a typical demersal marine species, with a wide distribution on the continental shelf. The highest abundance of P. grandisquamis occurs in March and November, around the 40 m isobath, facing the Superior-Inferior lake systems and Mar Muerto Lagoon. Reproduction occurred during all of the months studied, particularly from August to October, corresponding to the rainy season, when the salinity and temperature is lower. The presence of juveniles, principally in November and March, suggests a long period of recruitment; they are distributed mainly in the Superior-Inferior Lagoons, which serves as a nursery area where they remain until they are adults. The total female to male sex ratio was nearly 1:1 throughout the year. The maximum total length was 213 mm and the size at first maturity was 138 mm TL. The high abundance and reproduction occur when the gulf has a high level of ecological production, in accordance with the dynamics of the system, where the influence of coastal lagoons is important. Protection strategies for the area above the continental shelf of the Gulf of Tehuantepec are recommended for the estuary processes and for the reproduction and rearing of a large number of species, including P.

Population Abundance and Sex Ratio of the Viviparous Freshwater FishPoeciliopsis baenschi(Poeciliidae) Throughout its Range in Western Mexico

“…In the Neotropics, studies estimating demographic parameters of freshwater fishes are notably scarce in comparison with those focused on Nearctic and Palearctic regions (e.g., Killgore et al 2007, High et al 2008, Young et al 2010. As a consequence, little is known about the relative abundance, population characteristics (e.g., sex ratio), and persistence probabilities of these organisms in fluvial systems of the Neotropics (but see Arce-Uribe 2006, Ramos-Santiago et al 2006, Canto-Maza and Vega-Cendejas 2007. The current rate of change in land use and water pollution in highly diverse neotropical ecosystems (Miguel 1991, Achard et al 2002) also makes it imperative to know basic demographic traits of freshwater fish species.…”

Reproduction and community structure of fish from winter shrimp bycatch from the Southeast Gulf of California

“…The correlation among asymptotic length and first maturity length was of 85-91% across 265 fish species (Froese and Binohlan, 2000). However, for the most part of the species, there are no reports on many of its biological aspects; highlighting only studies of species A. mazatlanus, L. peru, P. woolmani and P. grandisquamis (Amezcua-Linares and Castillo-Rodriguez, 1992;Ramos-Santiago et al, 2006;Herrera-Valdivia, López-Martínez and Morales-Azpeitia, 2016;FishBase, 2017). In this sense, it is important to emphasize that both first maturity sizes and reproductive periods are not static, but are subject to environmental variations and the analysis methods (Rodríguez-Domínguez et al, 2015).…”

“…In tropical countries shrimp bycatch corresponds to more than 90% of the catch; some of these organisms with a greater marketing potential. Nevertheless, biological aspects from shrimp bycatch fish are scarce (Ramos-Santiago et al, 2006;Herrera-Valdivia, López-Martínez and Morales-Azpeitia, 2016). In addition to knowing the species of fish that comprise the bycatch, it is important to know their size structure and reproductive status, because a large part of shrimp bycatch organisms correspond to juveniles, or sub adults, which significantly affects recruitment for the following generations (Broadhurst et al, 2000).…”

Using life‐history information to assess potential effects of shrimp trawling on small fishes

“…It does appear, however, that reproductive activity was increasing through the winter into spring (September to March) and might peak sometime in the spring and summer months (April to August), just when the Gulf's industrial trawl fishery is closed. Elsewhere, reproductive peaks for P. grandisquamis in southern Mexico occurred in summer (August to October, Ramos‐Santiago et al , 2006), and Peruvian P. stephanophrys showed peak periods of reproduction in spring and summer (November to April, Castillo‐Rojas et al , 2000; Samamé & Fernández, 2000). It should be noted that the coefficients of determination ( r 2 ) were very low for the majority of regressions between I G and both L T and sample day, probably because highly variable I G values, consistent with batch spawning, obscured stronger relationships.…”