| use of protozoan communities for pollution monitoring. | a gradient of chronic organic pollution was identified in a small river in south-east england. the parasite fauna of the ubiquitous three-spined stickleback (gasterosteus aculeatus l.) was studied at the extremes of the pollution gradient and trichodinid ciliates identified as a potential bioindicator. a simple technique was developed for the quantification of whole body-burdens of trichodinids on small fish. three species of trichodinids were identified: trichodina domerguei, t. tenuidens and t ... | 1997 | 9802068 |
| ectoparasitic species of the genus trichodina (ciliophora: peritrichida) parasitising british freshwater fish. | seven species of the genus trichodina ehrenberg, 1838 were identified during a sampling programme of twenty freshwater fish species from approximately sixty sites in scotland, england and wales. species found include: trichodina acuta lom, 1961 from cyprinus carpio l., carassius auratus l., oncorhynchus mykiss (walbaum), salmo trutta l. and phoxinus phoxinus l.; trichodina domerguei wallengren, 1897 from gasterosteus aculeatus l.; trichodina tenuidens faure-fremiet, 1944 from gasterosteus aculea ... | 1998 | 9805782 |
| indices of stress in three-spined sticklebacks gasterosteus aculeatus in relation to extreme weather events and exposure to wastewater effluent. | whole-body concentrations of cortisol and glucose were measured in three-spined sticklebacks gasterosteus aculeatus from two rivers (rivers ray and ock) in southern england during a 30 month period in order to assess effects on the stress axis of (1) remediation of a wastewater treatment works (wwtw) effluent (river ray) and (2) episodic changes in flow rate arising from periods of high rainfall (rivers ray and ock). the postcapture concentrations of cortisol and glucose in fish from both rivers ... | 2011 | 21722123 |
| disruption of the stress response in wastewater treatment works effluent-exposed three-spined sticklebacks persists after translocation to an unpolluted environment. | the hypothalamic-pituitary-adrenal/interrenal (hpa/i) axis plays a key role in responding to biotic and abiotic challenges in all vertebrates. recent studies have shown that the apical response of the hpi axis to stressors in three-spined sticklebacks varies in proportion to the concentration of wastewater treatment works (wwtw) effluent to which the fish are exposed. this study was conducted to determine whether between-site variation in stress responsiveness among wwtw effluent-exposed stickle ... | 2016 | 26821232 |
| modulation of the stress response in wild fish is associated with variation in dissolved nitrate and nitrite. | disruption of non-reproductive endocrine systems in wildlife by chemicals has received little attention but represents a potentially significant problem. nitrate is a major anthropogenic contaminant in the freshwater aquatic environment and has been identified as a potential disrupter of endocrine function in aquatic animals. this study was conducted to investigate the relationship between the function of the neuroendocrine stress axis in fish and inorganic n loading along reaches of rivers rece ... | 2017 | 28318786 |
| population bottlenecks, genetic diversity and breeding ability of the three-spined stickleback (gasterosteus aculeatus) from three polluted english rivers. | pollution is a significant environmental pressure on fish populations in both freshwater and marine environments. populations subjected to chronic exposure to pollutants can experience impacts ranging from altered reproductive capacity to changes in population genetic structure. few studies, however, have examined the reproductive vigor of individuals within populations inhabiting environments characterized by chronic pollution. in this study we undertook an analysis of populations of three-spin ... | 2013 | 24071362 |
| histopathologic biomarkers in three spined sticklebacks, gasterosteus aculeatus, from several rivers in southern england that meet the freshwater fisheries directive. | this study demonstrates the utility and sensitivity of histopathologic biomarkers by recording lesions to the gill, liver and spleen in three spined sticklebacks (gasterosteus aculeatus) from several rivers in southern england which broadly comply with the water quality directives to protect fish health. the main study site was the letcombe brook system near wantage, graded 1 (good) to 3 (fair) by the environment agency, using the river ecosystem (re) class system. sites with similar grades on t ... | 2002 | 12521142 |