Differential species characters of Baruscapillaria anseris and B. obsignata nematodes obtained from the domestic goose

  • V. А. Yevstafieva Poltava State Agrarian Academy
  • V. I. Yeresko Poltava State Agrarian Academy
  • M. А. Pishchalenko Poltava State Agrarian Academy
  • L. V. Nagorna Sumy National Agrarian University


The study presents species composition and abundance of nematodes of the family Capillariidae (Nematoda, Trichocephalida), parasitizing the domestic goose (Anser anser dom. Linnaeus, 1758) in Poltava region, Ukraine. Morphological specifics of adult specimens of collected helminths are examined and new data is obtained for species identification of Capillariidae considering their metric parameters. The pathogens of capillariasis in geese are represented by two species, Baruscapillaria anseris (Madsen, 1945) Moravec, 1982 and B. obsignata (Madsen, 1945) Moravec, 1982 with the former predominant. Prevalence of infection by B. anseris in domestic fowl was up to 46.8%, the abundance index reached 17.9 specimens. The proportion of geese infected with B. obsignata was 23.9%, and the abundance index was 3.8 specimens. Morphological study of the collected mature male and female nematodes revealed the significant similarity of both species in the general body structure and in identification characters: vulva and vagina structure in females, tail end, spicule and spicule sheath in males. Statistically significant differences were determined in the metric parameters of male and female B. anseris and B. obsignata nematodes. Those differences can be used to improve species identification. Males of B. anseris were larger than males of B. obsignata by 16 metric parameters including the length and width of body, spicule and spicule sheath, width of pseudobursa, and distance between the rays of pseudobursa. Females of B. anseris and B. obsignata were significantly different by seven metric parameters. By five parameters (length and width of various body regions) the B. anseris females were larger than B. obsignata. Metric parameters of the studied species are also of interest for taxonomic identification: the eggs of B. obsignata are longer and narrower than those of B. anseris.


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How to Cite
YevstafievaV. А., Yeresko, V. I., PishchalenkoM. А., & Nagorna, L. V. (2018). Differential species characters of Baruscapillaria anseris and B. obsignata nematodes obtained from the domestic goose. Regulatory Mechanisms in Biosystems, 9(4), 578-583. https://doi.org/10.15421/021886