NDLI: Reproductive biology of the Neotropical electric fish Brachyhypopomus draco (Teleostei: Hypopomidae) from southern Brazil

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Reproductive biology of the Neotropical electric fish Brachyhypopomus draco (Teleostei: Hypopomidae) from southern Brazil

Content Provider	Scilit
Author	Schaan, Andrea B. Giora, Júlia Fialho, Clarice B.
Copyright Year	2009
Description	The reproductive biology of a population of the weakly electric fish Brachyhypopomus draco from southern Brazil is described. Information is provided on the establishment of the reproductive period in this species and its relations with environmental and feeding factors, as well as on the absolute and relative fecundities, spawning type, sex ratio and sexual dimorphism. The species exhibits a relatively long reproductive period, a relative fecundity of 0.173 oocytes per mg of female total weight, and fractional spawning. The sex ratio did not differ from 1:1 during all sampled months. Sexual dimorphism related to hypertrophy of the male's distal portion of caudal filament was observed and males grew to greater lengths than females. Male gonadosomatic index (GSI) was significantly related to water depth, oxygen saturation and temperature. Female GSI was significantly related to water depth and hepatosomatic index.
Related Links	http://www.scielo.br/pdf/ni/v7n4/a23v7n4.pdf http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1679-62252009000400023&lng=en&nrm=iso&tlng=en
Ending Page	744
Page Count	8
Starting Page	737
ISSN	16796225
e-ISSN	19820224
DOI	10.1590/s1679-62252009000400023
Journal	Neotropical Ichthyology
Issue Number	4
Volume Number	7
Language	English
Publisher	FapUNIFESP (SciELO)
Publisher Date	2009-01-01
Access Restriction	Open
Subject Keyword	Neotropical Ichthyology Fisheries Sciences
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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