Development and survival of embryos and alevins of the Atlantic salmon, <i>Salmo salar</i> L., continuously exposed to acidic levels of pH, from fertilization

Daye, P. G.; Garside, E. T.

doi:10.1139/z79-222

Cited by 51 publications

(24 citation statements)

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“…However, Oyen et al (1991) has found high percentage of deformity between 4.75 and 5.5 water pH. Contrary to this, no relationship between larval deformation and water pH was found in Salmo salar (Daye and Garside 1979;Peterson et al 1989). Hence, it seems that certain fish have high tolerance to water pH.…”

Section: Resultsmentioning

confidence: 94%

Optimal water temperature and pH for development of eggs and growth of spawn of common carp (Cyprinus carpio)

Sapkale¹,

Singh²,

Desai³

2011

Journal of Applied Animal Research

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The objective of the present study was to determine the influenceof water temperatures (26, 28 and 308C) and pH (5.5, 6.5, 7.5 and 8.5) variations on the hatchability of eggs and growth of spawn of common carp, Cyprinus carpio. The present results indicated that percentage of hatchability of eggs and incubation period decreased with increase in temperatures from 26 to 308C and pH levels from 5.5 to 8. ) and highest survival (96%) were recorded with pH 7.5 and water temperature 268C. Second order polynomial regression analysis relates the highest weight gain (3.59 g) at water pH 7.39, SGR (12.30) at pH 7.32 and water temperature 268C. The present results suggest that water pH 7.5 at water temperature 268C is best for hatchability of eggs and pH 7.39 for growth of spawn of Cyprinus carpio at same water temperature.

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Section: Resultsmentioning

confidence: 94%

Optimal water temperature and pH for development of eggs and growth of spawn of common carp (Cyprinus carpio)

Sapkale¹,

Singh²,

Desai³

2011

Journal of Applied Animal Research

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“…Since the most acidsensitive ontogenetic stages of brown trout are those from freshly fertilized ova to yolk sac fry (Daye & Garside, 1979), only a small proportion of ova is likely to hatch, enforcing annual bottlenecks during snow melt. The final population displaying reduced polymorphism, Eckbach (El) (He=0.0366; P=0.114), is isolated by a weir preventing immigration, and has never been stocked.…”

Section: Discussionmentioning

confidence: 99%

Allozyme variability of brown trout (Salmo trutta L.) populations across the Rhenanian–Danubian watershed in southwest Germany

1995

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Using horizontal agarose thin layer gel electrophoresis, 35 allozyme loci were screened in 233 brown trout (Salmo trutta L.) from 11 populations in southwest Germany across the RhenanianDanubian watershed. Polymorphism was found at 10 loci, with stocked populations exhibiting significantly increased polymorphism compared with unmanaged stocks (P= 0.2 19 vs. P= 0.132). Standard genetic distances between populations from different brooks averaged at D =0.01. Of the total gene diversity of GST =0.198, only a negligible amount partitioned between Rhenanian and Danubian drainages (GGT= 0.0 10). One biallelic locus, LDH5*, indicated river-specific allele frequencies, with the allele LDH-5 *105 being markedly more frequent within the Danubian drainage system. In contrast, LDH-5 *100 was close to fixation in the Rhenanian populations. This locus suggests a phylogeographical relationship of Danubian trout from southwest Germany with brown trout from southeastern Europe rather than with conspecifics of adjacent Rhenanian origin.

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“…In contrast, the prolonged duration of egg development was observed by Daye and Garside (1979) and Rask (1983). In common carp, Jezierska and Witeska, (1995) revealed that the eggs incubated at the level of pH 4.5 and 10.5 5 did not develop longer than 24h.…”

Section: Discussionmentioning

confidence: 96%

THE INFLUENCE OF WATER pHONTHE EMBRYONIC DEVELOPMENT OF GRASS CARP, TENOPHARYNGODONIDELL4

El‐Fiky

2002

Egypt. J. of Aquatic Biolo. and Fish.

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T his study was conducted to evaluate the effect of water pH on embryonic development of grass carp {Ctenopharyngodon idella). Eggs of grass carp were incubated in different levels of acidic and alkaline water. The general embryonic development was described briefly. Moreover, details were given as to the epiboly stage.The effect of the following pH values was tested: acidic water (4.5, 5.0 and 5.5) and alkaline water (9.5,10.0, and 10.5) on the embryonic development. Acidification and alkalization caused disturbances in cleavage and blastula formation and delay of hatching. At pH 4.5 and 10.5, there were no live eggs in 20h after fertilization. Mortality during the development indicate that the most sensitive stages were embryos just after fertilization and at hatching period. This study indicates that embryonic development of grass carp was possible within the range of pH 5.5 -9.5, although at the extreme pH levels, certain disturbances and increased mortality occurred. The changes and anomalies during development might have caused larva mortality during hatching. Survival of the embryos was calculated during development The percent of hatched eggs was calculated in relation to the number of fertilized eggs. The highest percentages of dead embryos were noticed at the extreme pH (4.5) and pH (10.5). The highest percentage of eyed embryos were recorded at pH (5.5) and pH (lO.O).The quality of the hatched larvae in abnormal levels of pH was worse compared to the control. They died gradually from the beginning of rearing in neutral water.Light and scanning electron microscopy (SEM) were used to study the effect of abnormal pH on the development of free neuromasts and structure of the eye. Excessive number of free neuromasts were found on the head region of hatched larvae incubated at alkaline pH. Differentiation of retina was inhibited at the 234 Nabil K. EL-Fiky same condition. Acidic pH caused partially delaminated lens epithelium and reduce the number of chromatophores .However, in the view of the results obtained, it can be stated that, even a short-term change of pH (resulting from industrial sewege) may adversely influence fish population, especially if occurs during embryonic development.

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Development and survival of embryos and alevins of the Atlantic salmon, Salmo salar L., continuously exposed to acidic levels of pH, from fertilization

Cited by 51 publications

References 0 publications

Optimal water temperature and pH for development of eggs and growth of spawn of common carp (Cyprinus carpio)

Optimal water temperature and pH for development of eggs and growth of spawn of common carp (Cyprinus carpio)

Allozyme variability of brown trout (Salmo trutta L.) populations across the Rhenanian–Danubian watershed in southwest Germany

THE INFLUENCE OF WATER pHONTHE EMBRYONIC DEVELOPMENT OF GRASS CARP, TENOPHARYNGODONIDELL4

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