The biological and reproductive parameters of the invasive armored catfish Pterygoplichthys disjunctivus from Adolfo López Mateos El Infiernillo Reservoir, Michoacán-Guerrero, Mexico

Abstract

Invasive Pterygoplichthys disjunctivus (Weber, 1991) (synonymy: Liposarcus multiradiatus) armored catfish were first reported in Mexico in 1995 and have spread successfully in several aquatic ecosystems. In Adolfo López Mateos El Infiernillo Reservoir, Michoacán -Guerrero, the population of this armored catfish is growing substantially because natural predators are not present and exploitation by humans does not occur. Over a complete annual cycle, we studied the following population parameters: weight, total and standard length, the relationship of weight to total length, the hepatosomatic (HSI) and gonadosomatic (GSI) indices, total fecundity (TF) and relative fecundity (RF). The average total (TL) and standard lengths (SL) were 248 ± 37.5 and 188 ± 30.7 mm, respectively, and the average weight (W) was 135.3± 66.8 g. The largest fish reported was 520 mm in TL and weighed 1 280 g. The species showed an extended reproductive season from May to November, as indicated by the GSI, TF and RF. The strongest reproductive peak occurred from July through October. During the annual cycle, the highest monthly average fecundity was 2 447 eggs, and the average relative fecundity was 12.6 eggs per g of fish (August and September). This information will be crucial for calculating the current biomass and future growth of the population. The calculation of these results could provide a basis for the exploitation of this resource for human consumption and animal feeds.

Invasion of non-indigenous suckermouth armoured catfish of the genus Pterygoplichthys (Loricariidae) in the East Kolkata Wetlands: Stakeholders’ perception

“…Negative allometric growth of Pterygoplichthys spp. with 'b' value of 2.79 found in the present study comply with the findings of Liang et al (2005), Samat et al (2008) and Rueda-Jasso et al (2013), which indicates that the fish tend to become thinner and less round with increasing length. Fluctuation in 'b' values of Pterygoplichthys spp.…”

“…in drainage of Kerala (Bijukumar et al, 2015). The maximum size specimen recorded (1200 g) from EKW is also comparable with the armoured catfish collected from Churumuco, Mexico which was 520 mm in total length (TL) and 1280 g in weight (Rueda-Jasso et al, 2013). Possible existence of still larger individuals of Pterygoplichthys spp.…”

“…Establishment of Pterygoplicthys population in the water bodies of EKW may be related to the congenial environment in the form of Eichhornia shed and ample food in the form of detritus provided by this ecosystem (Mendoza et al, 2009;Rueda-Jasso et al, 2013;Hussan, 2016). Eichhornia mats provide shelter as well as breeding ground for Pterygoplicthys and thus greater abundance of these fishes was noticed along the periphery of the ponds.…”

Physical and Chemical Properties of Biodiesel Obtained from Amazon Sailfin Catfish (Pterygoplichthys pardalis) Biomass Oil

“…In Mexico, its presence was identified for the first time in the Mezcala River, Guerrero (basin of the Balsas River), in 1995 and later in the Grijalva River in 2004, and since that date, the species has expanded to other regions of the country, reaching high abundance in the state of Campeche [33]. is species is considered one of the greatest threats to the biodiversity of continental aquatic ecosystems by its negative effects that include alteration of bank structure and erosion, disruption of aquatic food chains, changes in aquatic plant communities, displacing negative fishes by competition, and consuming its eggs that have a commercial importance in their respective regions [34,35]. Given the absence or few natural predators in the aquifer mantles where this fish has spread [36] and the negative impacts produced on the local fisheries [34], the capture of Amazon sailfin catfish is promoted for its processing and commercial use in various productive sectors [37].…”

Amazonian invaders in an Asian biodiversity hotspot: Understanding demographics for the management of the armoured sailfin catfish, Pterygoplichthys pardalis in Kerala, India

“…One possible reason for this could be the spatial distribution of young individuals in the population. It is known that several species of Pterygoplichthys show parental care and make nesting burrows for protecting the young (Lienart et al ., ; Rueda‐Jasso et al ., ). Therefore, there is a need to study in detail the reproductive ecology and breeding strategy of P. pardalis and identify spawning areas to target fingerlings for eradication.…”