Biologie et physiologie du developpement, de la croissance et de la reproduction des torpilles: un apercu des recherches depuis 1965

ABSTRACT

Since 1965, various works have pointed to electric rays [chiefly Torpedo marmorata and T. torpedo = T. ocellata] as an interesting material for the biological and physiological research on development [especially that of electric organs], growth and reproduction, In a review of the main published results, attention is called upon several points requiring new studies [buoyancy and its regulation during gestation time, neuroendocrine control of gestation, etc.]. T. torpedo, a much abundant species in the Bay of Tunis, seems by far the most well-suited material for this, because of its annual reproductive cycle. New results concerning T. m. are also presented gestation length, embryo retention, and weight changes of the yolk sacs. The microscopic structure of the female genital tract is illustrated