Influence of temperature on ovarian recrudescence in the Indian catfish, <i>Heteropneustes fossilis</i>

Saxena, P.K.; Sandhu, Rajwinder Kaur

doi:10.1111/j.1095-8649.1994.tb01593.x

Cited by 9 publications

(1 citation statement)

References 10 publications

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“…The variation in seasonal temperature influences the feeding activity of fishes including C. batrachus (Sinha et al, 1992) with higher feeding activity at higher temperatures (Hora & Pillai, 1962;Khanna, 1986). High temperature also promotes gonadal growth (Saxena & Sandhu, 1984;Lal et al, 1999). Thus, it is likely that temperature may affect the reproductive process by influencing dietary lipid metabolism, but information available so far is very fragmentary.…”

Section: Introductionmentioning

confidence: 99%

Modulatory effect of temperature on the influence of dietary linolenic (18:3 n-3) and linoleic (18:2 n-6) acids on the gonadal recrudescence in Clarias batrachus (L.)

Acharia¹

2000

Journal of Fish Biology

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During the late postspawning phase, freshwater catfish Clarias batrachus fed a diet rich in linseed oil (18 : 3 n-3) (LSO) and 13L : 11D photoperiod and at 28 C showed increases in ovarian weight and plasma levels of testosterone and oestradiol-17 , and in concentrations of free fatty acids (FFA), monoglycerides (MG), diglycerides (DG), triglycerides (TG), phospholipids (PL) and esterified cholesterol (CE) in the liver, plasma and ovary. In fish fed a diet rich in sunflower oil (18 : 2 n-6) (SFO) under the same conditions, plasma testosterone decreased sharply, concentrations of FFA, DG and TG increased in the liver and plasma and ovarian levels of TG and CE decreased. Neither diet was gonadostimulatory when fed at 18 C. 2000 The Fisheries Society of the British Isles

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Section: Introductionmentioning

confidence: 99%

Modulatory effect of temperature on the influence of dietary linolenic (18:3 n-3) and linoleic (18:2 n-6) acids on the gonadal recrudescence in Clarias batrachus (L.)

Acharia¹

2000

Journal of Fish Biology

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Influence of the Abaeté River on the reproductive success of the neotropical migratory teleostProchilodus argenteus in the São Francisco River, downstream from the Três Marias Dam, southeastern Brazil

Sato¹,

Bazzoli

Rizzo

et al. 2005

River Res. Applic.

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The curimatã-pacu Prochilodus argenteus is an important characiform from the São Francisco River basin that performs longdistance migrations for spawning upstream during the rainy season, when the temperature and photoperiod are elevated. Despite the interruption of the migratory routes by the Três Marias Dam and accentuated decline in fishing, the curimatã-pacu still sustains the fisheries at the Três Marias region in recent decades. The objective of this study was to evaluate the reproductive activity of P. argenteus in two sections of the São Francisco River, downstream from the Três Marias Dam, during the rainy season. In the first 34 km of the river, immediately below the dam, most of the females were in gonadal resting. At 34-54 km downstream from the dam, following the confluence with a medium-sized tributary, the Abaeté River, there was a high frequency of males and females in reproductive activity. Follicular atresia was more frequent in the upper section of the river while postovulatory follicles occurred predominantly in the lower section. Fulton's condition factor and gonadosomatic index indicated that the females were in a better physiological and reproductive condition below the confluence with the Abaeté River. In contrast to the females, the males were less affected by damming, and testicular maturation was largely achieved in two river sections. Thus, although the section of the São Francisco River immediately below the Três Marias Dam was found to be unfavourable for the reproduction of the migratory fishes due principally to the hypolimnetic water from the reservoir, reproductive success of P. argenteus was achieved below the Abaeté River. In this section, the species encountered appropriate conditions for maturation and spawning, i.e. warm temperatures above 24 C, high water flow and dissolved oxygen, and low water transparency. These results indicate the importance of a non-regulated tributary to minimize the ecological impact of a dam on the downstream native fish communities.

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Effect of temperature and photoperiod on the reproductive condition and performance of a tropical damselfish Chrysiptera cyanea during different phases of the reproductive season

Bapary

Takemura

2010

Fish Sci

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Effects of temperature and photoperiod on the reproductive activity of a reef associated tropical damselfish Chrysiptera cyanea were evaluated under three phases with different environmental patterns, phase I (April-May; increasing water temperature and photoperiod), phase II (June-July; increasing water temperature and peak/ decreasing photoperiod), and phase III (August-September; peak/decreasing water temperature and decreasing photoperiod). When the fish were reared at 20, 25, or 30°C under natural photoperiod, the reproductive conditions differed within and among the phases depending on experimental temperature and environmental patterns. From phases I through III, ovaries with vitellogenic oocytes were notable only at 25°C, whereas regressing and immature oocytes were noticed at 20 and 30°C. The fish underwent active spawning at 25°C, whereas no or few spawnings were observed at other temperatures. In phase III, there was a resultant prevention of decrease in the gonadosomatic index and disappearance of vitellogenic oocytes in the ovaries of fish under a long photoperiod (LD14:10) compared to those under a short photoperiod (LD10:14). These results indicate that a long photoperiod with a suitable range of water temperature is a principal determinant in continuity of reproductive activity and performance, and that a high temperature has a negative impact on their ovarian development.

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Influence of temperature on ovarian recrudescence in the Indian catfish, Heteropneustes fossilis

Cited by 9 publications

References 10 publications

Modulatory effect of temperature on the influence of dietary linolenic (18:3 n-3) and linoleic (18:2 n-6) acids on the gonadal recrudescence in Clarias batrachus (L.)

Modulatory effect of temperature on the influence of dietary linolenic (18:3 n-3) and linoleic (18:2 n-6) acids on the gonadal recrudescence in Clarias batrachus (L.)

Influence of the Abaeté River on the reproductive success of the neotropical migratory teleostProchilodus argenteus in the São Francisco River, downstream from the Três Marias Dam, southeastern Brazil

Effect of temperature and photoperiod on the reproductive condition and performance of a tropical damselfish Chrysiptera cyanea during different phases of the reproductive season

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