Open AccessPrevalence, intensity and gonadosomatic index of a nematode (Philometra sp.) infested in ovaries of Otolithes ruber from Southeast coast of India
Author(s) -
Periyasamy Selvakumar,
Alagarsamy Sakthivel,
Ayyaru Gopalakrishnan
Publication year - 2014
Publication title -
asian pacific journal of tropical disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.208
H-Index - 33
ISSN - 2222-1808
DOI - 10.1016/s2222-1808(14)60719-2
Subject(s) - gonadosomatic index , biology , nematode , ovary , fecundity , veterinary medicine , anatomy , ecology , population , medicine , endocrinology , environmental health
Objective: To carry out the prevalence, intensity, gonadosomatic index (GSI) of a nematode\ud(Philometra sp.) infested ovaries of Otolithes ruber (O. ruber).\udMethods: The specimen was encountered from January to December (seasons from post monsoon\udto monsoon), 2012. The Philometra nematode species are collected from a female specimen in the\udovary of O. rubber and the worms ware described. The ovaries were dissected and examined the\udprevalence intensity and GSI of nematode infection for each fish.\udResults: The present study showed the result of the nematode body length of gravid female (294.70\ud依2.99) mm and (147.50依4.11) mm in maximum width. The percent of overall prevalence is 28.66%依\ud10.17% and intensity of 1-3 nematodes per fish. That may prevent proper development of oocytes\udand probably affect O. ruber fecundity. Because the average GSI was 2.04 per fish, the number of\udova per gram body weight of fish was found as (158.00依3.90) ova/g and the number of ova per cm of\udlength of body was found to be (55 795.0依149.4) ova/cm.\udConclusions: Philometrids parasitizing in the gonads of their hosts may cause serious damage\udto these ovaries by lapping blood, which leads to the atrophy of developing ova in the ovary, the\udfibrosis of ovarian tissue, and results in granulocytes and bleeds, thus negatively affecting the\udreproduction of O. ruber