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Cyclic changes in gonadal maturation and histological observations of threatened freshwater catfish "narikeliru" Mystus montanus (Jerdon, 1849)

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Title Cyclic changes in gonadal maturation and histological observations of threatened freshwater catfish "narikeliru" Mystus montanus (Jerdon, 1849)
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Creator Antonysiluvai J. AROCKIARAJ
Mohammed A. HANIFFA
Sankaran SEETHARAMAN
Shriprakash SINGH
 
Subject gonadal maturation
histology
freshwater catfish
Mystus montanus
 
Description Not Available
Background. Usage of biosciences in increasing fish production needs to have a proper understanding and knowledge of endocrine physiology of fish reproduction. The most suitable method of determining the reproductive cycle in fishes is to observe seasonal development changes in the gonads. The present paper describes morphological changes in gonads of Mystus montanus.
Materials and Methods. The individuals of M. montanus were sampled monthly in captive conditio throughout one year to determine the changes occurring in gonadal histology and reproductive status. The stages of gonadal maturation and the seasonal changes in the proportion of oocyte development within the ovaries were noticed and maturity stages were assessed by microscopic and also macroscopic observations.
Results. The peak spawning period of Mystus montanus was noticed during November–January in male and October–December in female. The size at first maturity was 10–11 cm (8–12 g) in male and 13–14 cm (14–16 g) in female, respectively. M. montanus spawned only once in a year with the onset of north-east monsoon. The gonadosomatic index (GSI) ranged from 2.8 to 8.5 in males and from 4 to 16 in
females and their condition factor (CF) was 4–6 and 6–9, respectively.
Conclusion. The sequence of gonadal maturation in M. montanus is morphologically and histologically divided into five stages viz. immature, maturing, mature, matured, and spent or rest.
Indian Council of Agricultural Research–National Agricultural Technology Project (ICAR–NATP)
 
Date 2017-08-17T08:41:08Z
2017-08-17T08:41:08Z
2004
 
Type Research Paper
 
Identifier Arockiaraj, A.J., Haniffa, M.A., Seetharaman, S. and Singh, S., 2004. Cyclic changes in gonadal maturation and histological observations of threatened freshwater catfish'narikeliru'Mystus montanus [Jerdon, 1849]. Acta Ichthyologica et Piscatoria, 2(34).
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http://krishi.icar.gov.in/jspui/handle/123456789/5151
 
Language English
 
Relation Not Available;
 
Publisher ResearchGate