Aflatoxin Production in Supplemental Feeders Provided for Northern Bobwhite in Texas and Oklahoma

Oberheu, Deanna G.; Dabbert, C. Brad

doi:10.7589/0090-3558-37.3.475

Cited by 13 publications

(3 citation statements)

References 15 publications

(15 reference statements)

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“…However, no apparent benefits on gamebird production have been found in other studies (e.g. Hoodless, Draycott, Ludiman & Robertson 1999, Marjakangas & Puhto 1999), and even detrimental effects, such as aflatoxin production in bird feeders (Oberheu & Dabbert 2001), or increased predation rates (Huhta, Siekkinen & Keranen 1994), have been observed.…”

mentioning

confidence: 83%

Does supplementary feeding affect organ and gut size of wild red‐legged partridges Alectoris rufa?

2003

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Supplementary feeding of wild red‐legged partridges Alectoris rufa with wheat is a widespread management practice in hunting areas in Spain. Many studies note that energetic diets affect the physiology of hand‐reared galliforms. In order to assess if cereal supply might also affect wild birds, we studied the weight of the heart, spleen and liver, and the length of the small intestine and caecum of 129 wild red‐legged partridges from three hunting estates where wheat is supplied, and compared it with 67 partridges from two non‐supplied estates. Non‐supplied partridges had heavier hearts (9%, both in juveniles and adults), and longer caeca (20% in juveniles and 14% in adults) than supplemented birds. An excessive intake of energy‐rich items, such as the wheat supplied, instead of fibre‐rich or proteic natural food, might explain the differences found. The management implications of these findings are discussed.

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confidence: 83%

Does supplementary feeding affect organ and gut size of wild red‐legged partridges Alectoris rufa?

2003

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“…These negative effects include growth retardation, tumor development, and immunotoxicity, thus increasing crane susceptibility to predation and disease (Carnaghan, 1965;Choudhury, 1971;Huff et al, 1986;Kamalavenkatesh et al, 2005). Moreover, although low mycotoxin concentrations do not cause morbidity in controlled laboratory settings, it might reduce the survival probability of wild species that rely on highly efficient metabolic systems to cope with extreme environments, such as winter conditions (Oberheu and Dabbert, 2001). In addition, the simultaneous occurrence of more than one mycotoxin was common in analyzed mycotoxin-positive samples.…”

Section: Discussionmentioning

confidence: 99%

Potential natural exposure of endangered red-crowned crane (Grus japonensis) to mycotoxins aflatoxin B1, deoxynivalenol, zearalenone, T-2 toxin, and ochratoxin A

Liu

Zhang

et al. 2016

J. Zhejiang Univ. Sci. B

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Abstract:A survey was conducted to determine whether mycotoxins were present in the foods consumed by red-crowned cranes (Grus japonensis) in the Yancheng Biosphere Reserve, China. Collected in the reserve's core, buffer, and experimental zones during overwintering periods of 2013 to 2015, a total of 113 food samples were analyzed for aflatoxin B 1 , deoxynivalenol, zearalenone, T-2 toxin, and ochratoxin A using high performance liquid chromatography (HPLC). The contamination incidences vary among different zones and the mycotoxins levels of different food samples also presented disparity. Average mycotoxin concentration from rice grain was greater than that from other food types. Among mycotoxin-positive samples, 59.3% were simultaneously contaminated with more than one toxin. This study demonstrated for the first time that red-crowned cranes were exposed to mycotoxins in the Yancheng Biosphere Reserve and suggested that artificial wetlands could not be considered good habitats for the birds in this reserve, especially rice fields.

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“…One of the most common causes of wildlife feed contamination is fungal growth, which can produce toxic metabolic by-products known as mycotoxins, secondary metabolites of moulds 44 . For example, food contaminated with aflatoxin has been used as bait for white-tailed deer 45 and in supplemental feeders of northern bobwhite (Colinus virginianus) 46 . This mycotoxin is associated with carcinogenicity in human and animal populations 47 , and has been shown to cause hepatic lesions in white-tailed deer 48 .…”

Section: Anthropogenic Food and Cancer In Wildlifementioning

confidence: 99%

Human activities might influence oncogenic processes in wild animal populations

Giraudeau¹,

Sepp²,

Újvári³

et al. 2018

Nat Ecol Evol

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Based on the abundant studies available on humans showing clear associations between rapid environmental changes and the rate of neoplasia, we propose that human activities might increase cancer rate in wild populations through numerous processes. Most of the research on this topic has concentrated on wildlife cancer prevalence in environments that are heavily contaminated with anthropogenic chemicals. Here, we propose that human activities might also increase cancer rate in wild populations through additional processes including light pollution, accidental (for example, human waste) or intentional (for example, bird feeders) wildlife feeding (and the associated change of diet), or reduction of genetic diversity in human-impacted habitats. The human species can thus be defined as an oncogenic species, moderating the environment in the way that it causes cancer in other wild populations. As human impacts on wildlife are predicted to increase rather than decrease (for example, in the context of urbanization), acknowledging the possible links between human activity and cancer in wild populations is crucial.

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Aflatoxin Production in Supplemental Feeders Provided for Northern Bobwhite in Texas and Oklahoma

Abstract: Mycotoxins are toxic metabolites produced by various species of fungi. Aflatoxin (AF), a particular type of mycotoxin, can negatively impact many wildlife species in the laboratory; however, the magnitude of the problem in the field environment is unclear.

Cited by 13 publications

References 15 publications

Does supplementary feeding affect organ and gut size of wild red‐legged partridges Alectoris rufa?

Does supplementary feeding affect organ and gut size of wild red‐legged partridges Alectoris rufa?

Potential natural exposure of endangered red-crowned crane (Grus japonensis) to mycotoxins aflatoxin B1, deoxynivalenol, zearalenone, T-2 toxin, and ochratoxin A

Human activities might influence oncogenic processes in wild animal populations

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