4 research outputs found
Mortality of federally endangered fishes induced by artificial breaching of the Santa Clara River lagoon, Ventura County, southern California
Fishes of southern California coastal streams and associated coastal lagoons live with a Mediterranean-style hydrological cycle. Winter rains open the lagoons to the ocean; subsequent dry season low flows and changes in sandy beach dynamics closes them for most of the year. Artificial breaching of barrier sand berms can disrupt fish populations and cause mortality. Such breaches have been rarely observed and then only after some time has passed. An artificial breaching at the mouth of the Santa Clara River, Ventura County, CA coincided with an extreme low tide on 17 September 2010. We observed the mortality of thousands of both native and non-native fishes and invasive frogs; including at least thousands of the federally endangered Tidewater Goby (Eucyclogobius newberryi) and seven smolts of the federally endangered southern Steelhead (Oncorhynchus mykiss). Despite the many anthropogenic, faunal, and non-faunally related reasons for breaching, our observations confirm such actions can be detrimental to conservation and recovery of threatened and endangered species as well as to other fauna and flora dependent on such habitats
Mortality of Native and Non-native Fishes during Artificial Breaching of Coastal Lagoons in Southern and Central California
Volume: 117Start Page: 157End Page: 16
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Evaluation of heart murmurs in chinchillas (Chinchilla lanigera): 59 cases (1996-2009).
To determine the prevalence of heart murmurs in chinchillas (Chinchilla lanigera) and determine whether heart murmurs were associated with cardiac disease.Retrospective multi-institutional case series.260 chinchillas.Medical records of all chinchilla patients evaluated at the Tufts University Foster Hospital for Small Animals between 2001 and 2009, the University of California-Davis William R. Pritchard Veterinary Medical Teaching Hospital between 1996 and 2009, and the University of Wisconsin Veterinary Medical Teaching Hospital between 1998 and 2009 were reviewed.Prevalence of heart murmurs was 23% (59/260). Of 15 chinchillas with heart murmurs that underwent echocardiography, 8 had echocardiographic abnormalities, including dynamic right ventricular outflow tract obstruction, mitral regurgitation, hypertrophy of the left ventricle, tricuspid regurgitation, and hypovolemia. Echocardiographic abnormalities were approximately 29 times as likely (OR, 28.7) to be present in chinchillas with a murmur of grade 3 or higher than in chinchillas without a murmur.Results suggested that heart murmurs are common in chinchillas and that chinchillas with heart murmurs often have echocardiographic abnormalities, with valvular disease being the most common. On the basis of these results, we believe that echocardiography should be recommended for chinchillas with heart murmurs, especially older chinchillas with murmurs of grade 3 or higher. Further prospective studies are needed to accurately evaluate the prevalence of cardiac disease in chinchillas with heart murmurs
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Evaluation of heart murmurs in chinchillas (Chinchilla lanigera): 59 cases (1996-2009).
To determine the prevalence of heart murmurs in chinchillas (Chinchilla lanigera) and determine whether heart murmurs were associated with cardiac disease.Retrospective multi-institutional case series.260 chinchillas.Medical records of all chinchilla patients evaluated at the Tufts University Foster Hospital for Small Animals between 2001 and 2009, the University of California-Davis William R. Pritchard Veterinary Medical Teaching Hospital between 1996 and 2009, and the University of Wisconsin Veterinary Medical Teaching Hospital between 1998 and 2009 were reviewed.Prevalence of heart murmurs was 23% (59/260). Of 15 chinchillas with heart murmurs that underwent echocardiography, 8 had echocardiographic abnormalities, including dynamic right ventricular outflow tract obstruction, mitral regurgitation, hypertrophy of the left ventricle, tricuspid regurgitation, and hypovolemia. Echocardiographic abnormalities were approximately 29 times as likely (OR, 28.7) to be present in chinchillas with a murmur of grade 3 or higher than in chinchillas without a murmur.Results suggested that heart murmurs are common in chinchillas and that chinchillas with heart murmurs often have echocardiographic abnormalities, with valvular disease being the most common. On the basis of these results, we believe that echocardiography should be recommended for chinchillas with heart murmurs, especially older chinchillas with murmurs of grade 3 or higher. Further prospective studies are needed to accurately evaluate the prevalence of cardiac disease in chinchillas with heart murmurs