Risk screening of non-native suckermouth armoured catfishes <em>Pterygoplichthys</em> spp. in the River Dinh (Vietnam) using two related decision-support tools

Abstract

The invasion risk of non-native suckermouth catfishes Pterygoplichthys spp. in the River Dinh (Vietnam) was evaluated using two related decision-support tools, namely the Fish Invasiveness Screening Kit (FISK) and the Aquatic Species Invasiveness Screening Kit (AS-ISK). The results of screenings obtained independently by three assessors using both toolkits were evaluated for consistency, and compared with a screening study previously obtained for Vietnam as a wide risk assessment area. Both FISK and AS-ISK based screenings were shown to provide adequate and potentially important outcomes in terms of risk of invasiveness and were consistent amongst assessors and between toolkits. The invasion risk of Pterygoplichthys in the River Ding was found to be high and the traits of these fishes that influence their success of becoming established were considered. Some aspects in the use of FISK and AS-ISK as decision-support tools as part of the overall risk analysis of species’ invasions for large risk assessment areas are discussed.

Estimating the potential distribution range of the invasive South American suckermouth armoured catfishes Pterygoplichthys spp. in the Indo‐Burma biodiversity hotspot using MaxEnt

“…to new water bodies (Vander Zanden & Olden, 2008) and reducing further spread within invaded waterways, for example, the potential use of barriers as conservation tools (Rahel, 2013) and selectivity target Pterygoplichthys spp. during spawning migrations, in confined habitats, through continuous intensive fishing to reduce its population density (Chaichana & Jongphadungkiet, 2012); (4) studying the life history and behavioural traits and the physiological and hydraulic tolerances to identify potential control or eradication mechanisms (Zworykin & Đinh, 2023), for example, Australian researchers identified that invasive common carp Cyprinus carpio Linnaeus, 1758 jumped in constricted areas, while native fishes did not, and designed Williams' Cages to exploit this trait to reduce carp populations in Australia's waterways (Stuart et al, 2006);…”

“…The taxonomic status for several Pterygoplichthys species is uncertain with P. ambrosettii (Holmberg, 1893), P. disjunctivus (Weber, 1991) and P. pardalis (Castelnau, 1855) currently considered part of the P. multiradiatus (Hancock, 1828) group (Zworykin & Đinh, 2023).…”

“…Therefore, we adopted the 'open nomenclature' approach of Pterygoplichthys spp. used by several authors, for example, Wei et al (2017), Stolbunov et al (2020), Seshagiri et al (2021), Paul et al (2024 and Zworykin & Đinh (2023).…”

“…The taxonomic status for several Pterygoplichthys species is uncertain with P . ambrosettii (Holmberg, 1893), P. disjunctivus (Weber, 1991) and P. pardalis (Castelnau, 1855) currently considered part of the P. multiradiatus (Hancock, 1828) group (Zworykin & Đinh, 2023). Apart from differences in ranges, members of the P. multiradiatus group usually differ only in their highly variable colouration patterns (Armbruster & Page, 2006), with some variants not corresponding to any recognized species, while others appearing to be intermediates.…”

Spatial distribution and circadian locomotor activity of invasive armored catfish (Loricariidae) in the freshwater and brackish water

“…From 13 to 15 March, captured fish from BW sampling location were transferred to the test chambers. Fourteen fish were used with a standard body length 16 ± 1.1 (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) cm and a body weight 100 ± 16.7 (20-202) g. In experiments, we used fish with a standard body length � 22 cm without catch damages. In total, 14 trials with 364 hours of video were assessed.…”