Body size divergence promotes post-zygotic reproductive isolation in centrarchids ppt

... during the development of hybrid sunfishes (Perciformes, Teleosti). Differentiation, 9: 97–109. Body size disparity and post-zygotic isolation 913 Body size divergence promotes post-zygotic reproductive ... is that body size divergence modifies the rate at which hybrid inviability evolves between independently evolving lineages. We suggest there are two potential me...

Ngày tải lên: 22/03/2014, 12:20

... where Eudromia elegans and Tinamotis ingoufi occur near each other and where their habitat prefe- rences, foraging habits (including food items), and direct or indirect interactions (including competition) ... include instances of alIopatry, partial sympatry, and reproductive isolation. During a transect from the Atlantic coast westward to the foothills of the Andes in Chubut Province, A...

Ngày tải lên: 22/03/2014, 12:20

... the increasing interest in body size from the wider ecological community over the past 30 years, as well as the technical challenge involved in exploring body- size data. Of course, the fascination ... moment in time are likely to result both from the sum of evolutionary forces (determining maximal size obtainable) and time since disturbance (determining current body size) ....

Ngày tải lên: 17/02/2014, 19:20

... reconfigured to attract adolescents seeking information, counseling, and services. 8. Offering reproductive health information and services in non-clinical settings such as youth clubs/centers ... dried in a hygienic fashion. 34 Ninety-nine percent of the girls in the urban slum study associated menstruation with being unclean or impure. 35 The consequences of not maintaini...

Ngày tải lên: 05/03/2014, 16:20

... males and females in a naturally reproductive state during the breeding period in spring. Females were stimulated to spawn by injection of 0.1 ml of a 0.9% NaCl-solution containing 500-1000 IU ... [16], suggesting that reproductive barriers are still low or inexistent. The observed post-mating barriers (hybrid breakdown) in Sicilian green toads certainly induce selection to act agai...

Ngày tải lên: 05/03/2014, 17:20

... in any given case). Mechanisms of Reproductive Isolation In general, reproductive barriers are classified into pre-zygotic and post-zygotic categories (25). For marine species, post-zygotic isolation ... urchins. In this clztss, a sperm protein called bindin attaches sperm to the vitelline coat of eggs and promotes egg-sperm fusion (37, 44). Bindin is expressed only sperm...

Ngày tải lên: 28/03/2014, 16:20

... only increased slightly (10%) from the mating to the post-mating season and thus in the opposite direction of the change in range size observed in oestrous individuals. Moreover, the increase in ... range size of 2-year-olds (10%) was not large enough to explain the increase (74–177%) in range size from the mating to the post-mating season in females with cubs. Although rang...

Ngày tải lên: 28/03/2014, 16:20

... single greatest obstacle to addressing ARH in Morocco. It impedes investigating the issues in- depth to gain a real understanding of the situation. It constrains educating youth to enable them to develop ... family planning is concerned, could place reproductive health programs in a precarious position. 119 In addition, much of the increase in reproductive health funding has...

Ngày tải lên: 13/02/2014, 10:20

... partners. • Injecting drug use (and sharing infected needles) is an increasingly important factor in Kenya’s epidemic. RWANDA • HIV infection among adults is estimated to be 3.1 percent, with infections ... with an infected person. — Receiving a blood transfusion that contains HIV- infected blood or receiving a medical injection using equipment that has not been properly cleaned. — Be...

Ngày tải lên: 13/02/2014, 10:20

... programs lack institutional capacity and adequately trained staff to develop, deliver and sustain meaningful interventions pertaining to the sexuality of young people perinatally infected with ... increasingly provides opportunities to transmit relevant sexuality information to perinatally HIV-infected adolescents. In sum, wide programmatic gaps exist in addressing the sexual and re...

Ngày tải lên: 13/02/2014, 10:20