Annual changes in serum calcium and inorganic phosphate levels and correlation with gonadal status of a freshwater murrel, Channa punctatus (Bloch)

Srivastav, Sunil Kumar; Srivastav, Ajai K.

doi:10.1590/s0100-879x1998000800006

Cited by 16 publications

(8 citation statements)

References 22 publications

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“…A marked seasonal variation in plasma calcium level was observed in female M. armatus associated with ovarian maturation, similar to the result obtained by earlier workers in other fishes [18], [43]. Increase in its level was observed during the preparatory phase reaching the peak during pre spawning phase and spawning phase and considerably reduced during resting phase.…”

Section: Discussionsupporting

confidence: 88%

“…There exists a difference in the increase of plasma calcium level with respect to sex of the fish. It is more pronounced in females as reported from time to time by various workers [16]–[18]. The increase in plasma calcium during ovarian maturation is due to increased secretion of estrogen from the ovary [19], [20] as administration of estradiol was found to induce hypercalcemia [15], [20].…”

Section: Introductionmentioning

confidence: 73%

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Differential Activity of Stanniocalcin in Male and Female Fresh Water Teleost Mastacembelus armatus (Lacepede) during Gonadal Maturation

Verma

Alim

2014

PLoS ONE

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The present study was carried out to analyze the differences in the activity of hormone stanniocalcin (STC) between male and female fishes of Mastacembelus armatus during their gonadal cycle. A large variation in nuclear diameter of cells of corpuscles of Stannius (CS) were recorded in relation to testicular cycle as well as ovarian cycle which indicates that the cellular activity varied with different phases of reproductive cycle in both male and female fish. Similar changes in nuclear diameter of CS cells were also observed after 17alpha-methyltestosterone administration in males and 17 β-estradiol administrations in females. A positive correlation was observed between plasma STC levels, gonadosomatic index (GSI) and the sex steroids in both sexes, suggesting that STC has a role in the processes involved in gonadal development. In addition females showed remarkable changes in plasma calcium level during gonadal cycle while no such change for males were observed. In females the plasma calcium level estimated during different phases of reproductive cycle indicates positive correlation between plasma level of calcium and gonad growth. Thus hyperactivity of CS cells was noted in both male and female fishes during gonadal cycle along with the differences in the activity of STC as well. In female it may act as hypocalcemic factor and bring the level of calcium to normal which increases during preparatory and pre spawning phases to fulfill the increased demand of calcium for vitellogenesis. However data of male fishes indicated that plasma STC concentration varied widely during gonadal cycle but showed no consistent relationship to plasma calcium level.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 73%

Differential Activity of Stanniocalcin in Male and Female Fresh Water Teleost Mastacembelus armatus (Lacepede) during Gonadal Maturation

Verma

Alim

2014

PLoS ONE

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“…These spore sacs are separated by a thin layer of follicular cells (Sertoli cells) in each spore sac there is plenty of synchronously developing germ cells (spermatocytes and spermatids). After formation of sperms, spore sacs disintegrate and sperm enter the cavity of seminiferous tubules secreted by testis forming the so-called milt (Srivastav and Srivastav 1998).…”

Section: Discussionmentioning

confidence: 99%

“…Parameswaran and Murugesan 1976), C. punctata (Bloch, 1793)(cf. Srivastav and Srivastav 1998), C. striata (Bloch, 1793)(cf. Haniffa et al 2000), "Clarias lazera" = Clarias gariepinus (Burchell, 1822)(cf.…”

Section: Introductionmentioning

confidence: 99%

Cyclic changes in gonadal maturation and histological observations of threatened freshwater catfish "narikeliru" Mystus montanus (Jerdon, 1849)

Arockiaraj¹,

Haniffa²,

Seetharaman³

et al. 2004

Acta Ichthyol. Piscat.

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Background. Usage of biosciences in increasing fish production needs to have a proper understanding and knowledge of endocrine physiology of fish reproduction. The most suitable method of determining the reproductive cycle in fishes is to observe seasonal development changes in the gonads. The present paper describes morphological changes in gonads of Mystus montanus. Materials and Methods. The individuals of M. montanus were sampled monthly in captive condition throughout one year to determine the changes occurring in gonadal histology and reproductive status. The stages of gonadal maturation and the seasonal changes in the proportion of oocyte development within the ovaries were noticed and maturity stages were assessed by microscopic and also macroscopic observations. Results. The peak spawning period of Mystus montanus was noticed during November-January in male and October-December in female. The size at first maturity was 10-11 cm (8-12 g) in male and 13-14 cm (14-16 g) in female, respectively. M. montanus spawned only once in a year with the onset of northeast monsoon. The gonadosomatic index (GSI) ranged from 2.8 to 8.5 in males and from 4 to 16 in females and their condition factor (CF) was 4-6 and 6-9, respectively. Conclusion. The sequence of gonadal maturation in M. montanus is morphologically and histologically divided into five stages viz. immature, maturing, mature, matured, and spent or rest.

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“…L. Berliner, Georgia Aquarium, personal communication). This fish did have elevated plasma calcium (21.7 mg/dL) and phosphorus (18.4 mg/dL) levels, which may be indicative of folliculogenesis and chronically elevated levels of estradiol (Bailey 1957;Srivastav and Srivastav 1998). Unfortunately, estradiol blood levels were not tested in this fish.…”

Section: Discussionmentioning

confidence: 92%

Spongiosis Hepatis in a Wild Aquarium‐Maintained Red Irish Lord

et al. 2015

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An aquarium-maintained female Red Irish Lord Hemilepidotus hemilepidotus presented with severe coelomic distension. The fish was anesthetized for ultrasonographic examination, which highlighted multiple cyst-like lesions in the liver and a distended ovary that was filled with follicles and an inspissated egg mass. Multiple exploratory celiotomies were performed for egg mass removal, liver biopsy, ovariosalpingectomy, and body wall rupture repair. Fourteen weeks after original presentation, and subsequent to 2 weeks of anorexia, the fish died. At necropsy, the liver was severely enlarged and distorted by multiple, coalescing, cyst-like spaces with no grossly normal liver parenchyma. The spleen also contained a raised cyst-like structure. Microscopically, the liver had well-demarcated foci of hepatocyte loss with retained meshworks of interconnected, perisinusoidal stellate cells. The fluid-filled spaces surrounded by stellate cells were not lined by epithelium or endothelium. The spleen had similar fluid-filled spaces formed of stellate cells. The cyst-like lesions in the liver were consistent with spongiosis hepatis; however, the concurrent development of a morphologically comparable lesion in the spleen is not typical of spongiosis hepatis cases. This case may represent the first report of spontaneously occurring spongiosis hepatis in a fish maintained in a public aquarium, as well as the first report in a fish of spongiosis hepatis-like lesions in an organ other than the liver.

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Annual changes in serum calcium and inorganic phosphate levels and correlation with gonadal status of a freshwater murrel, Channa punctatus (Bloch)

Cited by 16 publications

References 22 publications

Differential Activity of Stanniocalcin in Male and Female Fresh Water Teleost Mastacembelus armatus (Lacepede) during Gonadal Maturation

Differential Activity of Stanniocalcin in Male and Female Fresh Water Teleost Mastacembelus armatus (Lacepede) during Gonadal Maturation

Cyclic changes in gonadal maturation and histological observations of threatened freshwater catfish "narikeliru" Mystus montanus (Jerdon, 1849)

Spongiosis Hepatis in a Wild Aquarium‐Maintained Red Irish Lord

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