Effects of lead on the spawning potential of the fresh water fish,Anabas testudineus

Tulasi, S.J.; Reddy, P. U. M.; Rao, J. Venkateswara

doi:10.1007/bf01702056

Cited by 19 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In turn, in the Atlantic croaker ( Micropogon undulatus ) lead in water inhibited the secretion of LH, reduced the level of testosterone and oestradiol in blood as well as caused a decrease in the weight of gonads (Thomas , ). Similar effects were observed in the climbing perch ( Anabas testudineus ), banded gourami ( Colisa fasciata ) and walking catfish ( Clarias batrachus ) (Katti & Sathyanesan ; Srivastava ; Tulasi, Reddy & Rao ). Lead has a strong toxic effect on the central and peripheral nervous system, weakens the immune system and is carcinogenic to humans (Lustberg & Silbergeld ).…”

Section: Introductionsupporting

confidence: 58%

Impact of long-term dietary exposure to lead on some reproductive parameters of a female Common carp (Cyprinus carpioL.)

et al. 2015

View full text Add to dashboard Cite

During a long-term 3-year dietary exposure of mature carp females to lead, its bioaccumulation in the brain, changes in the neurohormonal activity at the level of the hypothalamus and the pituitary gland as well as the growth and maturation of ovaries were analysed. Moreover, an analysis of the effectiveness of hormone-stimulated spawning during two subsequent spawning seasons was carried out. The results of the analyses show that chronic exposure of maturing and mature carp females to lead in feed results in its accumulation in the brain (1.365 lg g À1 ). This impairs the endocrine activity of the hypothalamus, which is manifested by, among others, an increased secretion of dopamine and impaired spontaneous secretion of luteinizing hormone (LH). The observed decrease in the concentration of gonadotropin in blood inhibits vitellogenesis, which is manifested by a lower degree of the maturity of oocytes, lower fecundity (as measured by egg number, egg weight, egg maturity and egg survival) and lower gonadosomatic index values. The final negative impact of lead is the impairment of reproductive functions, as manifested by a smaller number of spawning females and in their lower fecundity during spawning.

show abstract

Section: Introductionsupporting

confidence: 58%

Impact of long-term dietary exposure to lead on some reproductive parameters of a female Common carp (Cyprinus carpioL.)

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Esto podría ser provocado por la contaminación de las aguas. varios autores han encontrado un decrecimiento del tamaño de las gónadas en experimentos realizados para determinar el efecto de distintos contaminantes sobre los peces (Tulasi et al 1989, Munkittrick et al 1992Choudhury et al 1993). En general, el impacto de la contaminación a largo plazo trae consigo un decrecimiento en la fecundidad y en la supervivencia de los peces (Kime 1995, Wendelaar 1997.…”

Section: Discussionunclassified

Variaciones en la abundancia de peces en sitios con diferente grado de contaminación del sublitoral de Ciudad de La Habana, Cuba

Hernández¹,

Betancourt²,

Sansón³

2008

RBT

View full text Add to dashboard Cite

Abundance variations of fishes from sites with different levels of pollution in the sublittoral sector of Havana City, Cuba. The impact of human activity affects fish populations. We studied the abundance of three selected fish species (Stegastes partitus, Thalassoma bifasciatum and Halichoeres bivittatus) in four sites with different degrees of pollution in Havana City: 30 th street and 16 th street; Miramar; Red Boy of Havana Bay; and the ending of Almendares´s River. The sites were divided into five zones depending on their bottom characteristics. The counts were made with the visual census technique with a 5m 2 quadrat, from June-July 2003 to January 2004. Each time we made nine counts per zone. S. partitus and T. bifasciatum were more abundant in clean water areas, while Halichoeres bivittatus seems to resist the levels of pollution present in the area. Rev.

show abstract

“…Unlike other classes of pollutants, which can be biodegraded and destroyed, metals are non-biodegradable (Wepener et al 2001) and can neither be created nor destroyed. An accelerated release of heavy metals into the aquatic environment poses serious water pollution problems because of their toxicity (Tulasi et al 1989), persistence, and bioaccumulation in food chains (Rishi and Jain 1998). Heavy metal accumulation in the environment could be because of acid mine drainage, industrial emissions, traffic, domestic sewage, storm water, atmospheric deposition, and building materials (Xia et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Seasonal assessment of some heavy metal pollution and Metallothionein gene expression in cultured Oreochromis niloticus

et al. 2019

View full text Add to dashboard Cite

Background: The present study was planned to estimate the heavy metal concentrations in water samples and fish tissue residue (liver and muscle) of cultured Oreochromis niloticus as well as metallothionein (MT) gene expression in fish liver. Fish samples were collected from different private fish cultures in Kafr El-Sheikh governorate during April 2018-April 2019 in order to assess the public health risks associated with consuming cultured fish. Therefore, we investigated the concentrations of four metal elements (cadmium [Cd], copper [Cu], lead [Pb], and zinc [Zn]) in both fish tissues (muscle and liver) and water samples during the four seasons. Other water parameters (pH value, chemical oxygen demand, dissolved oxygen, alkalinity, total hardness, ammonia, and nitrite) were also determined. Results: NH3 values were above recommended limits mostly along the year. The trend of metal mean contents found in the fish were in decreasing order of Zn > Cu > Pb > Cd, and the liver showed greater accumulation than muscle. The highest amounts of metals accumulated in fish liver and muscle were recorded in winter and autumn, respectively, while the lowest amount was recorded in summer. Regarding fish muscle which is the edible part consumed by human, the concentration of studied metals was within the safe limits for seafood except for Pb. MT showed a significant high level in response to metals accumulated in fish liver. A positive correlation occurred between MT levels and Cu and Pb concentrations across different seasons. Conclusion: In conclusion, MT expression levels seem to be sensitive to the heavy metals in natural habitats making it a powerful biomarker of heavy metals pollution in fish cultures. In addition, cultured fish in this study could be unfit for human consumption due to a high level of Pb in the edible part of fish. Therefore, greater attention should be set to Pb sources accumulated in cultured fish in Kafr El-Sheikh governorate.

show abstract

Effects of lead on the spawning potential of the fresh water fish,Anabas testudineus

Cited by 19 publications

References 6 publications

Impact of long-term dietary exposure to lead on some reproductive parameters of a female Common carp (Cyprinus carpioL.)

Impact of long-term dietary exposure to lead on some reproductive parameters of a female Common carp (Cyprinus carpioL.)

Variaciones en la abundancia de peces en sitios con diferente grado de contaminación del sublitoral de Ciudad de La Habana, Cuba

Seasonal assessment of some heavy metal pollution and Metallothionein gene expression in cultured Oreochromis niloticus

Contact Info

Product

Resources

About