Are there any research comparing catfish and sharks for any reason?

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James Burgess

Dr. Kovalchuk:

Thank you so very much for the books. I will read them earnestly. They will definitely be helpful. I do appreciate your efforts. Do you know of any research that compares characters of sharks to the same type of characters of catfishes. I am in the process of studying Dr. Darryl Whitehead's work on the comparison of the catfishes and shark's ampullae of Lorenzini.

Please keep in touch and keep those references coming that you think will help me in my quest.

Thanks again:

Golam Kibria

Please see below some of publication references related to research on steroid hormones in sharks

ER Hoffmayer, JA Sulikowski, JM Hendon. 2010. Plasma steroid concentrations of adult male Atlantic sharpnose sharks, Rhizoprionodon terraenovae, in the northern Gulf of Mexico, with notes on potential long term …Env Biol Fish.88:1-7

Charles A. Manire, L.E.L. Rasmussen and Timothy S. Gross . 1999. Serum steroid hormones including 11-ketotestosterone, 11-ketoandrostenedione, and dihydroprogesterone in juvenile and adult bonnethead sharks, Sphyrna tiburo. Journal of Experimental Zoology. 284 (5): 595–603

T J Koob, P Tsang and I P Callard. 1996.Plasma estradiol, testosterone, and progesterone levels during the ovulatory cycle of the skate (Raja erinacea). Biology of reproduction. 35: 267-275.

LEL Rasmussen and FL Murru . 1992. Long-term studies of Serum Concentrations of reproductively related Steriod Hormones in individual captive Carcharhinids. Australian Journal of Marine and Freshwater Research 43(1) 273 - 281

AD Henningsen, FL Murru, LEL Rasmussen. 2008. Serum levels of reproductive steroid hormones in captive sand tiger sharks, Carcharias taurus (Rafinesque), and comments on their relation to sexual conflicts. Fish Physiol Biology. 34: 437-446.

Thank you for the references. I will look them up and study them in earnest. I am researching the testosterone levels in catfish probably being the more aggressive species, but have not been able to find any as of yet.