Adaptive parental effects: the importance of estimating
... draw inference on the adaptive significance of parental effects. Ideally, genetic lineages (or ‘families’) should be reared in a quantitative genetic design for multiple generations prior to beginning the experiment to equalize parental environmental effects between families (Agrawal 2002). In many in ...
... draw inference on the adaptive significance of parental effects. Ideally, genetic lineages (or ‘families’) should be reared in a quantitative genetic design for multiple generations prior to beginning the experiment to equalize parental environmental effects between families (Agrawal 2002). In many in ...
What is the appropriate timescale for measuring
... activities (maintenance, growth, etc.). At this point, the timescale becomes important ± and for the reptile, the appropriate timescale is surely that over which these resources have been gathered, not just the `reproductive' year. The problem is even worse for survival rates, the other main potenti ...
... activities (maintenance, growth, etc.). At this point, the timescale becomes important ± and for the reptile, the appropriate timescale is surely that over which these resources have been gathered, not just the `reproductive' year. The problem is even worse for survival rates, the other main potenti ...
Breeding systems, climate, and the evolution of migration in shorebirds
... migration distance is determined by parental care. Alternatively, long-distance migration may limit the time and energy available for parental care and favor early desertion by one or both parents such that migration distance determines parental care. These 2 alternatives predict that reduced parent ...
... migration distance is determined by parental care. Alternatively, long-distance migration may limit the time and energy available for parental care and favor early desertion by one or both parents such that migration distance determines parental care. These 2 alternatives predict that reduced parent ...
Chapter-12
... • Reproductive mode by which offspring arise from two parents and inherit genes from both • ½ of each parent’s genetic information is passed to offspring ...
... • Reproductive mode by which offspring arise from two parents and inherit genes from both • ½ of each parent’s genetic information is passed to offspring ...
Coerced group collaborative evolution as an explanation for sexual
... the genetic information of two individuals. These reproductive barriers have been well documented. For a detailed discussion on these reproductive barriers and isolating mechanisms such as ecological isolation, behavior isolation, temporal and mechanical isolation, as well as the prevention of fusio ...
... the genetic information of two individuals. These reproductive barriers have been well documented. For a detailed discussion on these reproductive barriers and isolating mechanisms such as ecological isolation, behavior isolation, temporal and mechanical isolation, as well as the prevention of fusio ...
1 to appear in R. Singh, D. Paul, C. Krimbas, and J. Beatty (eds
... specified pattern of growth. If we follow this ensemble for, say, 1000 years, what we will find is that almost all of the populations will go extinct, but a very small number will become huge; averaging over these end results, we’ll obtain the result that, on average, populations grow by 2% a year. ...
... specified pattern of growth. If we follow this ensemble for, say, 1000 years, what we will find is that almost all of the populations will go extinct, but a very small number will become huge; averaging over these end results, we’ll obtain the result that, on average, populations grow by 2% a year. ...
Sexual Size Dimorphism, Diet, and Reproduction in the Mexican
... than females (Table 1, Fig. 2C; F1,291 = 10.37, P = 0.001; HL [mm] = 0.31 (SVL) + 1.82 [mm] for males and HL [mm] = 0.35 (SVL) + 0.79 [mm] for females). We found an isometric relationship between SVL and TaL as well as between SVL and HL (Fig. 3). The distribution of HL for females deviated from nor ...
... than females (Table 1, Fig. 2C; F1,291 = 10.37, P = 0.001; HL [mm] = 0.31 (SVL) + 1.82 [mm] for males and HL [mm] = 0.35 (SVL) + 0.79 [mm] for females). We found an isometric relationship between SVL and TaL as well as between SVL and HL (Fig. 3). The distribution of HL for females deviated from nor ...
Name: Date: Subject: Sexual vs. Asexual Reproduction Objectives
... Asexual reproduction produces offspring that are genetically identical to the parent organism. We call them clones. This doesn’t mean that they are exactly the same, it just means that they have the same DNA or genes. Asexual reproduction requires only 1 parent so asexually reproducing organisms do ...
... Asexual reproduction produces offspring that are genetically identical to the parent organism. We call them clones. This doesn’t mean that they are exactly the same, it just means that they have the same DNA or genes. Asexual reproduction requires only 1 parent so asexually reproducing organisms do ...
Growth, Survival, and Reproduction in a Northern Illinois Population
... then used as grouping variables to obtain age- and sex-specific survival using program MARK. The results suggest that males and females have approximately equal survival in the 0 and 1 age classes but that females have higher survival than males as adults (0.45 vs 0.35). Population estimates calcula ...
... then used as grouping variables to obtain age- and sex-specific survival using program MARK. The results suggest that males and females have approximately equal survival in the 0 and 1 age classes but that females have higher survival than males as adults (0.45 vs 0.35). Population estimates calcula ...
Asexual and Sexual Reproduction & Animal Development
... actually resemble eukaryotes in the way they work than prokaryotes like bacteria • Ex: Paramecium can reproduce asexually by fission or sexually by conjugation ...
... actually resemble eukaryotes in the way they work than prokaryotes like bacteria • Ex: Paramecium can reproduce asexually by fission or sexually by conjugation ...
Reproduction - cloudfront.net
... and hydras form new organisms when part of the parent breaks off to form a daughter cell that grows into a new individual that is identical to the parent. ...
... and hydras form new organisms when part of the parent breaks off to form a daughter cell that grows into a new individual that is identical to the parent. ...
Mammal Reproductive Strategies Driven by Offspring Mortality
... by projecting trait values onto a standard reference line, as shown here. ...
... by projecting trait values onto a standard reference line, as shown here. ...
Asexual vs. Sexual Reproduction
... There are advantages and disadvantages to each method, but the result is always the same: a new life begins. ...
... There are advantages and disadvantages to each method, but the result is always the same: a new life begins. ...
Asexual vs. Sexual Reproduction
... There are advantages and disadvantages to each method, but the result is always the same: a new life begins. Asexual Reproduction ...
... There are advantages and disadvantages to each method, but the result is always the same: a new life begins. Asexual Reproduction ...
Asexual vs. Sexual Reproduction
... There are advantages and disadvantages to each method, but the result is always the same: a new life begins. Asexual Reproduction ...
... There are advantages and disadvantages to each method, but the result is always the same: a new life begins. Asexual Reproduction ...
Male reproductive investment and queen mating
... Sperm number and male accessory gland compounds are often important determinants of male mating success but have been little studied in social insects. This is because mating in social insects is often difficult to manipulate experimentally, and first evidence for an explicit influence of accessory ...
... Sperm number and male accessory gland compounds are often important determinants of male mating success but have been little studied in social insects. This is because mating in social insects is often difficult to manipulate experimentally, and first evidence for an explicit influence of accessory ...
Evolution of sex ratios in social hymenoptera: kin selection, local
... allocation between the two sexes is that a parent is equally related to his or her sons and daughters. In haplodiploid social insects such as wasps, bees and ants, sterile female workers often feed and care for their siblings instead of producing their own offspring. Haplodiploidy, a genetic system ...
... allocation between the two sexes is that a parent is equally related to his or her sons and daughters. In haplodiploid social insects such as wasps, bees and ants, sterile female workers often feed and care for their siblings instead of producing their own offspring. Haplodiploidy, a genetic system ...
what determines sex roles in mate searching?
... calling males (Lucas and Howard 1995), this alternative response to density has also led to a suggested general explanation of sex roles (Wickman and Rutowski 1999): males should be the default searching sex because they have the most to gain from multiple matings but, at low density, females are se ...
... calling males (Lucas and Howard 1995), this alternative response to density has also led to a suggested general explanation of sex roles (Wickman and Rutowski 1999): males should be the default searching sex because they have the most to gain from multiple matings but, at low density, females are se ...
Cell Reproduction
... The process of cell division is how multicellular organisms grow and repair themselves. It is also how many organisms produce offspring. For many single-celled organisms, asexual reproduction is a similar process. The parent cell simply divides to form two daughter cells that are identical to the pa ...
... The process of cell division is how multicellular organisms grow and repair themselves. It is also how many organisms produce offspring. For many single-celled organisms, asexual reproduction is a similar process. The parent cell simply divides to form two daughter cells that are identical to the pa ...
September 2005 Newsletter - Transvaal Herpetological Association
... Three of the newly discovered tree frog species lay very sticky bright green eggs on similar colored leaves that develop into young frogs _ skipping the tadpole stage _ and emerge as smaller versions of their ...
... Three of the newly discovered tree frog species lay very sticky bright green eggs on similar colored leaves that develop into young frogs _ skipping the tadpole stage _ and emerge as smaller versions of their ...
SCIENCE 9 UNIT 4:REPRODUCTION WORKSHEET 5
... produce offspring in the absence of a mate. There is only one parent New organisms made this way are exactly the same as the parent. This is because the genetic message is from just one parent. It is different from sexual reproduction where the new organisms have a genetic message from two parents. ...
... produce offspring in the absence of a mate. There is only one parent New organisms made this way are exactly the same as the parent. This is because the genetic message is from just one parent. It is different from sexual reproduction where the new organisms have a genetic message from two parents. ...
Asexual & Sexual Reproduction
... Crayfish: Cray fish can regrow claws, pinchers, or legs. It is easy to recognize the regenerated part because it is smaller than the other parts. Just like the lizard, it can break off a claw or leg so that it can escape when captured by a predator. ...
... Crayfish: Cray fish can regrow claws, pinchers, or legs. It is easy to recognize the regenerated part because it is smaller than the other parts. Just like the lizard, it can break off a claw or leg so that it can escape when captured by a predator. ...
Intrapopulation variation in life history traits of Boa constrictor
... years for such traits may suggest a signi cant adaptive component (Seigel and Fitch, 1985). Age structure and sex ratio are essential parameters to understand the life history and dynamics of threatened species. The age structure of a population can reveal trends in growth and maturation and may be ...
... years for such traits may suggest a signi cant adaptive component (Seigel and Fitch, 1985). Age structure and sex ratio are essential parameters to understand the life history and dynamics of threatened species. The age structure of a population can reveal trends in growth and maturation and may be ...
Parental investment
Parental investment (PI), in evolutionary biology and evolutionary psychology, is any parental expenditure (time, energy etc.) that benefits one offspring at a cost to parents' ability to invest in other components of fitness, and is thus a form of sexual selection. Components of fitness include the wellbeing of existing offspring, parents' future sexual reproduction, and inclusive fitness through aid to kin. Parental investment may be performed by both the male and female (biparental care), the mother alone (exclusive maternal care) or the father alone (exclusive paternal care).Initially introduced in 1930 by the English biologist and statistician Ronald Fisher, parental care is found in a broad range of taxonomic groups, including both ectothermic (invertebrates, fish, amphibians and reptiles), and endothermic (birds and mammals) species. Care can be provided at any stage of the offspring's life: pre-natal care including behaviours such as egg guarding, preparation of nest, brood carrying, incubation, and placental nourishment in mammals; and post-natal care including food provisioning and protection of offspring.