Seasonal changes in the testes of a freshwater fish Channa gachua

Sanwal, Rajni; Khanna, Subhash K.

doi:10.1159/000143855

Cited by 11 publications

(8 citation statements)

References 6 publications

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“…Hollow lobules and finger like projecting caeca occur in the testes of Glyptothorax pectinopterus [Khanna and Pant, 1966], Salhyanesan [1959] and Rai [1965] observed lobulations in the testes of Mystus seengliala and B. tor, respectively. Swarup [1958] and Sanwal and Khanna [1972] observed a simple and smooth surface in the testes of Gasterosteus aculeatus and Channa gachua, respectively. The testes of G. gotyla show a smooth surface throughout the year, and no lobulation was detected in this species.…”

Section: Discussionmentioning

confidence: 99%

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Seasonal changes in the testes of a hill stream teleost, <i>Garra gotyla</i> (Gray)

Shrestha¹,

Khanna²

1978

Cells Tissues Organs

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The cephalic, middle and posterior regions of the testes in Garra gotyla are identical in structure and function. The spermatogenetic activity starts in the month of October reaching its peak in April and May. Spawning takes place in June and July followed by a brief resting period. Spermiation appears to be intermittent. Six stages of spermatogenesis have been described. New crop of germ cells appears to arise from the resting spermatogonia. Both the interstitial and the lobule boundary cells were observed. The gonosomatic index shows correlation between the rise in water temperature and the volume of the testes.

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Section: Discussionmentioning

confidence: 99%

“…Khanna and Pam [1966], Ahsan [1966], Geoffery and Geoffery [1966], Rastogi [1965Rastogi [ , 1966, Hyder [1970]. Ruby and McMillan [1970], Nayyar and Sundararaj [1970] and Sanwal and Khanna [1972]. It is well known that the teleosts inhabiting in different ecological conditions exhibit great diversity of their reproductive behaviour.…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in the testes of a hill stream teleost, <i>Garra gotyla</i> (Gray)

Shrestha¹,

Khanna²

1978

Cells Tissues Organs

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“…The pertinent literature on the histomorphology of the testis and annual cyclical changes in the testicular activity of teleostean fishes has been cited by Bhatti & Javaid (1973). Other important works are those of Sanwal & Khanna (1972), Donaldson (1973), Mackay (1973), Bisht (1974), Dobson & Dodd (1974), Macer (1974), Scott (1974), Wourms & Evans (1974) and Payne (1975).…”

Section: Introductionmentioning

confidence: 99%

Annual cyclical changes in the testicular activity of a freshwater teleost, Barbus luteus (Heckel) from Shatt‐Al‐Arab, Iraq

Bhatti

Al‐Daham

1978

Journal of Fish Biology

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The testes of Barbus luteus are a pair of elongated structures composed of an anastomosing system of seminiferous lobules. Six spermatogenetic stages of germ cells have been described in the gonad. The endocrine factor lies in the interstitial cells. Spermiation occurs during the months of May, June and July. Fertilization appears to be external. Un‐expelled spermatozoa undergo pycnotic degeneration. The testes show a regular annual cycle which has been described in five arbitrary stages.

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“…The literature contains a number of vague references to the effect that gonad asymmetry is not uncommon in fishes (e.g., MacGregor 1968;Sanwal and Khanna 1972;Ramon and Bailey 1996), but there is insufficient information to determine its frequency. In species in which both gonads develop, the ovary size ratio ranges from 8.8 in capelin (Winters 1971) to around 1.3 in trout, anchovies, and pollan (Brown and Kamp 1942;MacGregor 1968;Vallisneri and Scapolatempo 2000).…”

Section: Discussionmentioning

confidence: 99%

Parasitism, space constraints, and gonad asymmetry in the pollan (Coregonus autumnalis)

Harrod

Griffiths²

2005

Can. J. Fish. Aquat. Sci.

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Both sexes of Lough Neagh pollan (Coregonus autumnalis) show directional asymmetry in gonad mass, the left being larger than the right in 70% of individuals. The frequency and degree of asymmetry are size independent in males but become progressively more marked in females of > 120 g somatic mass. There is little evidence to support the hypothesis that the size of the body cavity constrains gonad size. Pollan are heavily and size-dependently infected by metacercariae of the trematode Ichthyocotylurus erraticus. Total gonad mass in both sexes of pollan is negatively correlated with infection intensity of this parasite. In females, mean egg size shows no trend but fecundity declines and the degree of asymmetry in ovary mass increases with infection intensity up to a threshold, beyond which it remains constant. While directional asymmetry in gonad size is strongly developmentally controlled in many fish species, variation in the degree of gonad asymmetry in pollan provides a potentially sensitive indicator of stres

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Seasonal changes in the testes of a freshwater fish Channa gachua

Cited by 11 publications

References 6 publications

Seasonal changes in the testes of a hill stream teleost, <i>Garra gotyla</i> (Gray)

Seasonal changes in the testes of a hill stream teleost, <i>Garra gotyla</i> (Gray)

Annual cyclical changes in the testicular activity of a freshwater teleost, Barbus luteus (Heckel) from Shatt‐Al‐Arab, Iraq

Parasitism, space constraints, and gonad asymmetry in the pollan (Coregonus autumnalis)

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