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Gonadal development and differentiation in alligator mississippiensis at male and female producing incubation temperatures


, : Gonadal development and differentiation in alligator mississippiensis at male and female producing incubation temperatures. Journal of Zoology (London) 218(4): 679-688

The development and differentiation of the gonads of embryonic alligators incubated at 30.degree. C (100% female producing) and 33.degree. C (100% male producing) was investigated histologically. The stage of development of the gonad and differentiation into an ovary or a testis occurred at essentially the same time at both temperatures. This contrasts with the overall development of the embryos which was slower at the lower temperature. A few days prior to differentiation, gonads grew more quickly at 33.degree. C than they did at 30.degree. C. However, once differentiated into a presumptive testis, gonads reduced in volume so that at hatching presumptive testes were smaller than presumptive ovaries. It is hypothesized that synchrony/asynchrony of development of the gonad and the rest of the embryo may account for temperature-dependent sex determination.

US$19.90

DOI: 10.1111/j.1469-7998.1989.tb05009.x


Other references

Tyrner, P., 1970: Insects with wintering bats. Ziva, Prague, 18: 221-222

Holomuzki, J.R., 1986: Effect of microhabitat on fitness components of larval tiger salamanders, Ambystoma tigrinum nebulosum. Survivorship and growth of larval tiger salamanders, Ambystoma tigrinum nebulosum, in the White Mountains of east-central Arizona were compared in six microhabitats using field enclosures during summers, 1983-85. Microhabitats were vegetated and n...

Arya, S.C.; Agarwal, N.; Agarwal, S., 2006: Re: Reduction of broad-spectrum antibiotic use with computerized decision support in an intensive care unit. To implement and evaluate the effect of a computerized decision support tool on antibiotic use in an intensive care unit (ICU). Prospective before-and-after cohort study. Twenty-four bed tertiary hospital adult medical/surgical ICU. All consecutiv...

Houser, H.P.; Postell, W.D., 1960: Faculty profile--William Dosite Postell. Bulletin of the Tulane Medical Faculty 19: 151-154

Barrick, J.E., 2009: Predicting riboswitch regulation on a genomic scale. Riboswitches are vital components of many genomes. Covariance model searches for the characteristic architectures of riboswitch aptamer domains can be used to predict new examples of these structured RNAs. Since riboswitches generally function as...

Wise, M.D., 1982: Occlusion and restorative dentistry for the general practitioner 4. the clinical significance of the examination findings. The clinical significance of the findings of the specific occlusal examination will be considered in the same order as the examination procedures outlined in Part 2. For many cases, study casts are mounted on a semi-adjustable articulator to enabl...

Peerbooms, H., 1984: Reinders, a new smooth Golden Delicious selection. Data are presented on the percentage of Class 1 fruits (in terms of skin finish) of 8 Golden Delicious apple clones, assessed over 8 years, and of 6 clones (Crielaard, Reinders and 4 virus-free cultivars). In both trials Reinders fruits were consi...

Canceill M.F., 1974: Convolution and recession in the study of the relation between rainfall and discharge. Memoires - Association Internationale des Hydrogeologues = Memoires - International Association of Hydrogeologists 10(1): 181-184

Ford, Findlay J., 1933: The metabolism of healing in coeliac rickets. Observations on 2 cases of celiac rickets showed increase in retention of CaO and P2O5 with antirachitic treatment, increase in urinary excretion of P2O5, decrease in ammonia and increase in acidity of the urine during healing, and marked reductio...

Zawirska, B.; Derubska, B., 1985: A case of pulmonary aspergillosis in a patient with a history of byssinosis. Wiadomosci Lekarskie 38(13): 953-957