Changes induced by manganese in fish testis

Srivastava, A K; Agrawal, S.J.

doi:10.1007/bf01990385

Cited by 14 publications

(6 citation statements)

References 4 publications

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“…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

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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.

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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

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“…1982). It was also demonstrated that Mn is better absorbed via the dietary mode (Srivastava & Agrawal 1983) and high levels of dietary calcium and phosphorus considerably reduce its absorption (Watanabe et al. 1997).…”

Section: Discussionmentioning

confidence: 99%

Growth, feed efficiency and body mineral composition of juvenile vundu catfish (Heterobranchus longifilis, Valenciennes 1840) in relation to various dietary levels of soybean or cottonseed meals

Toko

Fiogbé²,

Kestemont³

2008

Aquaculture Nutrition

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This study aimed to assess the effect of soybean meal (SBM) and cottonseed meal (CSM), as partial replacement of dietary fish meal on growth, feed efficiency (FE) and body mineral composition of juvenile vundu (Heterobranchus longifilis). Five iso-nitrogenous (390 g kg )1 crude protein) and isocaloric (18 kJ g )1 , gross energy) diets (Control, SBM30, SBM60, CSM30 and CSM60) were fed to triplicate groups of 40 fish (initial mean weight: 12 g) in each tank (0.9 m 3 ). Over a 7-week feeding period, significant differences (P < 0.05) were observed on growth, FE and body mineral composition between treatments. Fish-fed CSM-based diets and 600 g kg )1 SBM-based diet had reduced growth and reduced feed and protein efficiencies when compared with those fed diet containing 300 g kg )1 SBM or the control diet. Data from body mineral composition in response to dietary treatment could be divided into two groups. The first group refers to elements such as Mg and Fe for which carcass and fillet composition did not show significant differences with dietary level of SBM or CSM. Ca, P, K, Zn and Mn composed the second group of minerals whose concentrations in fish body were significantly reduced in fish-fed SBM60. In conclusion, the results of this study indicate that although solvent-extracted SBM and CSM are often reported safe for fish, they can only partially replace fish meal as a source of protein in compound feed for vundu at a limited amount between 300 and 600 g kg )1 for SBM and <300 g kg )1 for CSM. KEYWORDS

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“…Like all animals, fish require minerals as essential factors in a wide variety of metabolic functions. Because manganese (Mn) content of the water is not sufficient for the requirement of the fish, diet is considered a more significant source of the element (Srivastava & Agrawal 1983; NRC 1993).…”

Section: Introductionmentioning

confidence: 99%

Bioavailability of amino acid-chelated and glass-embedded manganese to rainbow trout, Oncorhynchus mykiss (Walbaum), fingerlings

Satoh

Apines

Tsukioka

et al. 2001

Aquaculture Research

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Feeding experiments were conducted to determine the bioavailability of new types of manganese (Mn) supplement to rainbow trout fingerlings. Two levels of Mn (7 and 14 mg kg−1 diet) were supplemented to diets using either manganese sulphate (Mn‐S), glass‐embedded Mn (Mn‐Gl), or amino acid‐chelated Mn (Mn‐Am); more than one acid was used to chelate the metal. Rainbow trout weighing 1.30 g on average were fed the experimental diets for 12 weeks. Absorption of Mn from various compounds was evaluated using larger fish (105 g on average) fed the experimental diets. Growth was higher in the group supplemented with Mn‐Am at both levels. Whole‐body Mn content in fish fed the diet supplemented with Mn‐Am was significantly higher than the other sources. Bone Mn accumulation was significantly higher in treatments with 14 mg Mn kg−1 diet from all sources, except Mn‐Gl. At 7 mg kg−1, absorption from Mn‐Am was significantly higher than from Mn‐Gl and Mn‐S. Mn retention from both levels of Mn‐Am supplementation was significantly higher (P < 0.05) than the rest. The results indicated that amino acid‐chelated Mn provided more bioavailable nutrient than Mn‐S and Mn‐Gl. Further, availability of Mn from Mn‐Gl is equivalent to that of Mn‐S.

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Changes induced by manganese in fish testis

Abstract: Exposure of Colisa fasciatus, a freshwater teleost, to 2500 mg/l manganese sulphate for 90 h caused decreased spermatogenic activity and hemorrhage in the testes.

Cited by 14 publications

References 4 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.)

Growth, feed efficiency and body mineral composition of juvenile vundu catfish (Heterobranchus longifilis, Valenciennes 1840) in relation to various dietary levels of soybean or cottonseed meals

Bioavailability of amino acid-chelated and glass-embedded manganese to rainbow trout, Oncorhynchus mykiss (Walbaum), fingerlings

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