In this paper we describe spatial and temporal variation in life-history traits of the viviparous
fish Gambusia vittata.
Reductions in abscisic acid are linked with viviparous
reproduction in mangroves.
He said: "Lizards' reproduction is largely linked to climatic temperatures and viviparous
species are usually found in cold environments.
32) So just as cetacea share most features with viviparous
quadrupeds, but, like fish, live in the water and do not have legs, so the kapnospheric ejected shooting star is similar in place and matter to the upper combustions, but shares its efficient cause (ejection) with the lower thunderbolts.
As a viviparous
animal, young whale sharks develop in eggs that remain inside the mother until they hatch.
This collection of 18 extended articles focuses on specific issues, including techniques and events leading to a fertilizable oocyte, physiological functions of gonadotropins, functions and patterns of change in gonadal steroids, vitellogenesis, follicular steroidogenesis, hormonally derived sex pheromones, reproductive physiology in viviparous
teleosts, mating systems, reproductive strategies, cost-benefit comparisons in energy investments, reproductive behavior in shoaling fish, parental care and predator risk, the impact of environmental factors on fish endocrinology, shark reproductive ecology, estrogen pathways, molecular markers of androgen disruption, concerns about the effects of aquaculture, and fish reproduction within cultivation of cold water marine species.
Quadrupeds of North America proved more difficult than he had anticipated, as many native animals were nocturnal and their habits were hard to learn.
It is suggested that in viviparous
mammals, the cortical system is subjected to unwanted or "parasitic" modes of behavior, which arise as the system is disturbed either by the growth of the brain or by the modifications produced by experience.
RCM values tend to be lower in viviparous
snakes because they must carry their young for a longer period of time (Shine and Schwartzkopf 1992).
These images are at the heart of Audubon's last great work, the three-volume Viviparous
Quadrupeds of North America (1845-1848), completed with the help of his sons, Victor Gifford Audubon and John Woodhouse Audubon, and written mostly by Audubon's longtime friend, the naturalist and Lutheran minister John Bachman.
Of all sex-role-reversed species, the only ones which are viviparous
[offspring are born live rather than laying eggs] are seahorses and pipefish--which have male gestation.
The common, or viviparous
lizard, emerges from hibernation in March, and will bask in the sun like the rarer sand lizard, in a favoured spot.