Record of morphological deformities in Corydoras aff. longipinnis in two reservoirs under urban influence in Upper Iguaçu and Southern Coastal basins in Paraná State, Brazil

Abstract

In this work we report on the presence of morphological deformities in Corydoras aff. longipinnis from two reservoirs in Paraná State, Brazil. The frequency of deformities in the fish populations was 11% in Iraí and 10.5% in Capivari reservoirs. Considering that the frequency may be associated with impacts caused by anthropic activities, this information can be used as a metric in management systems and environmental monitoring.

Morphological deformities in the invasive driftwood catfish Trachelyopterus galeatus in the Upper Paraná River basin, Brazil: a sign of human impact?

“…Since the early 2000s, records of deformities in the rays and spine dysplasia in ossified fins were observed in several groups of fishes of the Guaíba Lake, Southern Brazil (Malabarba et al, 2004; Flores‐Lopes & Reuss‐Strenzel, 2011). Recently, these deformities were also found in the adipose fin of Callichthyidae individuals from the Iguaçu River, Southern Brazil, but a complete absence of the structure was not reported (Mise et al ., 2017). Nonetheless, severe deformities, such as the total absence of pelvic fins and bones of the pelvic girdle, were recorded for the first time only at the end of twenty‐first century second decade, in freshwater Elasmobranchii individuals of the Juruá River, Northwestern Brazil (Da Silva & Casas, 2020).…”

“…Records of morphological deformities in the structures of fish in Brazil are recent and still less studied (Malabarba et al, 2004; Flores‐Lopes & Reuss‐Strenzel, 2011; Mise et al ., 2017). Similarly, extreme conditions such as the total absence of structures were recorded only once in freshwater Elasmobranchii (Da Silva & Casas, 2020).…”

“…It is known that the surroundings of the Rosana and Taquaruçu reservoirs are exposed to agriculture, livestock and discharge of domestic and industrial effluents (Cunico et al ., 2006; Vidotto‐Magnoni et al ., 2015). Therefore, the fish deformities there might denote the poor water quality in the environment (Mise et al ., 2017), which may also compromise the native fish assemblages (Malabarba et al, 2004; Flores‐Lopes & Reuss‐Strenzel, 2011). Thus, further analysis should be performed to clarify the factors influencing the deformities observed here (Rutkayová et al, 2016; Jawad et al ., 2018).…”

Genes and elements involved in the regulation of the nervous system and growth affect the development of spinal deformity in Cyprinus carpio

“…Fish species may exhibit various kinds of morphological deformities, such as bone and skin neoplasms and spine deformations [2], dysplasia in the opercular bones, mandibular bones and maxillary-mandibular apparatus and anomalies in fins and eyes [3]. Skeletal deformities are a major factor that affects the external morphology, survival and growth of the fish and production cost and so downgrade hatcheries' production [4].…”

Spinal malformations in a naturally isolated Neotropical fish population

“…Fish species may develop different types of morphological deformities, such as dysplasia in the opercular bones, maxillary-mandibular apparatus, and mandibular bones; anomalies in fins and eyes (Mise, Tencatt & Santos, 2017); bone and skin neoplasms; and spine deformations (Flores-Lopes, Cetra & Malabarba, 2010). Dorsoventral (lordosis), lateral (scoliosis) or upward spinal curvature (kyphosis) malformations can cause anomalous body appearance (Bengtsson, Bengtsson & Himberg, 1985) and be treated as monstrosities (Golubtsov, Korostelev & Levin, 2021), but such anomalies are often not visible if only a few vertebrae are affected (Gjerde, Pante & Baeverfjord, 2005;Kvellestad et al, 2000;Witten et al, 2006).…”