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Gonad morphology of the hermaphroditic fish diplectrum pacificum serranidae


, : Gonad morphology of the hermaphroditic fish diplectrum pacificum serranidae. Copeia (3): 448-453

Histological and gross examinations were conducted on the gonads of D. pacificum collected from the Bay of Panama. There is a single gonad wihch bifurcates into 2 ovarian lobes anteriorly. Posterior to the point of bifurcation, the ovarian lobes combine to run medial to a broad ring of testicular tissue. Sperm enter into a dorsal sperm sinus, then enter a sperm duct. The sperm duct becomes closely aligned with the mesonephric duct to which it joins just prior to exit through an elongate papilla. Mature eggs enter a posterior ovarian sinus. The ovarian sinus bears numerous elongate ovarian folds which are villae-like and show a positive PAS [periodic acid Schiff] reaction when many mature eggs are present in the sinus. A putative endocrine tissue is described which is similar to previously described suspected endocrine tissues from related species. The ovarian villae-like structures are apparently unique to Diplectrum and this and other differences in gonad morphology are noted between Diplectrum and Serranus. These differences may be important in understanding the relationship between these genera.

US$19.90

DOI: 10.2307/1443262


Other references

L.G.ludec, D.; Paillole, C.; Daou, D.; Faraggi, M., 1997: Contribution of isotopic myocardial exploration in diabetes. Annales d'Endocrinologie 58(1): 47-54

Pearson, E.F., 1956: Rehabilitation in Illinois. Illinois Medical Journal 109(6): 302-303

Treacy, D.A., 1981: Design for selection programs for pigs. A discussion.

Park K.Y.; O.S.K.; Rho S.P.; Kim S.D.; Choi W.Y., 1988: Effects of meteorological factors on growth and grain yield of soybeans in the southern region of korea. To obtain the basic information on the relationship between meteorogical factors and yield components, grain yield in soybeans, this research tried to investigate response of two soybean varieties (Kwangkyo, Danyeopkong) to climate factors such as...

Kaushal, M.; Gupta, P.K., 1977: Endrin intoxication in normal and irradiated rats II. Lipid, phospholipid and cholesterol content. Bulletin of Environmental Contamination and Toxicology 18(3): 355-360

Pinto, G., A.; Tardioli, P., W.; Cabrera-Padilla, R., Y.; Galvao, C., M.A.; Giordano, R., C.; Giordano, R., L.C., 2008: Amino acids yields during proteolysis catalyzed by carboxypeptidase A are strongly dependent on substrate pre-hydrolysis. The hydrolysis of polypeptides (45 degrees C, pH 7.0), catalyzed by bovine pancreas carboxypeptidase A (CPA) immobilized on 6%-agarose beads (weight basis), activated with linear aliphatic aldehyde groups (glyoxyl-agarose) is studied here. Reacti...

Yurekli, V.Ali.; Kaya, O.; Aydin, F.Incekara.; Bircan, H.Ahmet.; Kutluhan, S.Leyman.; Kayan, M.; Gonen, I., 2014: A case of multi-drug-resistant, intracranial tuberculomas, presenting with headache. Indian Journal of Pathology & Microbiology 56(4): 481-483

Keefe, D.L., 1984: Pharmacology of lorcainide. Lorcainide is a new type 1 antiarrhythmic drug that is well absorbed orally, with bioavailability increasing with both dose and continued administration. It is metabolized through the liver, and patients with significant liver disease will require...

Sağlam, A.; Usubütün, A.; Dolgun, Aıl.; Mutter, G.L.; Salman, M.Coşkun.; Kurtulan, O.; Akyol, A.; Özkan, E.Akar.; Baykara, S.; Bülbül, D.; Calay, Z.; Eren, F.; Gümürdülü, D.; Haberal, N.; Ilvan, Şennur.; Karaveli, Şeyda.; Koyuncuoğlu, M.; Müezzinoğlu, B.; Müftüoğlu, K.Hakan.; Özen, Özlem.; Özdemir, N.; Peştereli, E.; Ulukuş, Çağnur.; Zekioğlu, O., 2017: Diagnostic and Treatment Reproducibility of Cervical Intraepithelial Neoplasia / Squamous Intraepithelial Lesion and Factors Affecting the Diagnosis. Inter-observer differences in the diagnosis of HPV related cervical lesions are problematic and response of gynecologists to these diagnostic entities is non-standardized. This study evaluated the diagnostic reproducibility of "cervical intra...

Shrivastava S.K.; Mohan Raj D., 1990: Systematic geological mapping in parts of Munger, Deoghar and Giridih districts of Bihar for map compilation. Records of the Geological Survey of India 123, Part 3: 4-7