A histopathological study on the Caucasian dwarf goby from an anthropogenically loaded site in Hungary using multiple tissues analyses

Abstract

The present study aimed to investigate for the first time the health status of the Caucasian dwarf goby Knipowitschia caucasica (Berg, 1916, Fishes of freshwaters of Russian Empire, p. 563, Moscow, Russia: Dep. Zemledeliya) (Teleostei: Gobiidae) from an anthropogenically loaded site in Hungary using histopathological analyses on multiple tissues. For that purpose, fish were collected from the public beach at Tiszafüred near the River Tisza. Gills, liver and kidney were subjected to histopathological analyses, and the results showed different alterations in each organ, which also differed in their extent and severity. In addition, we also found lesions in the reproductive organs of both, male and female fish which, overall, we hypothesized could be due to untreated municipal wastewaters, most likely contaminated with endocrine‐disrupting chemicals. The multi‐organ histopathological analyses of Caucasian dwarf gobies revealed different lesions, prevalence and severity in each target organ, as follows: liver>gills>kidney>gonad (testes and ovaries). These histopathological lesions can be assessed as good indicators of contamination by endocrine‐disrupting chemicals of freshwater ecosystems.

Effects of Essential Oil Derived from the Bitter Orange (Citrus aurantium) on Growth Performance, Histology and Gene Expression Levels in Common Carp Juveniles (Cyprinus carpio)

“…A light microscope was used to inspect and image the sections. Histopathological changes, degree and extent of change were assessed as - (0): none, + (1): mild occurrence, + + (2): moderate occurrence, + + + (3): severe occurrence, according to previously studies [ 17 , 18 ].…”

Stepping Stone Wetlands, Last Sanctuaries for European Mudminnow: How Can the Human Impact, Climate Change, and Non-Native Species Drive a Fish to the Edge of Extinction?

“…Currently, insufficient treatment of wastewater and the spreading of nonnative species constitute a threat to the wildlife and the remained mudminnow stocks. In many cases, the Zala River is the recipient of mainly treated wastewater, antibiotics, endocrine disruptors, and pharmaceutical residues that can harm the environment [242][243][244][245]. The appearance of the Amur sleeper in the late 2000s is a serious concern, as well as the tropical aquarium fish, which originated from the field of aquaria [165,176,177,234,235,245,246].…”

Regulation and Optimization of Urban Water and Land Resources Utilization for Low Carbon Development: A Case Study of Tianjin, China

“…Urban water production and treatment consume a lot of energy, resulting in carbon emissions. Meanwhile, the utilization modes of water and land resources also change the habitats of biota and affect the biological health status [4,5], ultimately affecting urban development and human survival. In 2012, the U.S. Department of Energy [6] systematically analyzed the carbon emissions of water and land resources utilization, which is a new approach to carbon emission research.…”