The greater amberjack Seriola dumerili is a large teleost fish with rapid growth and excellent flesh quality, whose domestication represents an ambitious challenge for aquaculture. The occurrence of reproductive dysfunctions in greater amberjack reared in captivity was investigated by comparing reproductive development of wild and captive-reared individuals. Wild and captive-reared breeders wer...

Identifying the sources of variation in traits of larvae is one of the first steps in interpreting the role of phenotypic variation in recruitment. We examined the contributions of geographic source and parentage to phenotypic variation in offspring traits in a gadid, Microgadus tomcod, from 2 contrasting yet nearby locations. Adults were collected from the Hudson River (HR), a polluted riverin...

The large macroand microscopic variability in kidney morphology among fish makes it difficult to build a “universal” understanding on its function and structure [1]. Species-specific studies are thus needed. Thus, morphological study of brown trout trunk kidney was performed, considering potential seasonal and gender effects. Three-year-old specimens of both genders were collected at four stage...

Fevold et al. (1) and Wallen-Lawrence (2) have reported the separation of a follicle-stimulating principle and a luteinizing principle from hypophyseal gonadotropic preparations. The latter author includes evidence for a chemical separation involving destruction of the luteinizing principle by formalin. Maxwell (3) on the other hand was able to obtain a pure follicular ovarian response simply b...

Correspondence: Ekaterina Pavlova Institute of Experimental Morphology, Pathology and Anthropology with Museum, BAS, Acad. G. Bonchev Str., Bl. 25, 1113 Sofia, Bulgaria. Tel.: +359 2 979 2336 e-mail: [email protected] ABSTRACT Sodium nitrite (NaNO2) is an inorganic salt with various industrial applications. In the circulation NaNO2 oxidizes hemoglobin to methemoglobin, which is incapable of t...

Walleye pollock, Theragra chalcogramma, is the most commercially important species in the eastern Bering Sea. Estimates of maturity are critical for setting an appropriate harvest rate for pollock spawning biomass, and correct classification of ovaries into a maturity condition is necessary for accurate estimation of maturity. Data on length, weight, and ovary weight and condition were collecte...

Specific temporal phase relation of neural oscillations appears to be the regulator of gonadal development in many seasonally breeding species. To find out the specific phase angle of two neural oscillations that triggers gonado-inhibitory or gonado-stimulatory response, and to test the internal coincidence model, sexually immature male Japanese quail were administered with the serotonin precur...