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Heritable Melanism and Parasitic Infection Both Result in Black-Spotted Mosquitofish


, : Heritable Melanism and Parasitic Infection Both Result in Black-Spotted Mosquitofish. Southeastern Naturalist 12(1): 209-216

Male Gambusia holbrooki (Eastern Mosquitofish) express a heritable pigmentation polymorphism: ?99% of males are silver, and only ?1% have a melanic, black-spotted pattern. Sex-linkage, an autosomal modifier, and temperature control the expression of this heritable melanism. In many teleosts, melanin also accumulates around the site of parasitic invasion. We have identified black-spot disease in wild mosquitofish from their native habitat. Here, we demonstrate convergence upon the black-pigmented phenotype through two means: 1) heritable melanism, and 2) melanic spotting on the silver genotype that results from infection with immature encysted trematodes. Females are silver and express greater avoidance of melanic males during mating attempts. The resemblance of the black-spotted pattern of the melanic genotype to that of silver genotype infected with trematodes may affect the fitness of melanic males if females perceive them as diseased. Alternatively, females may shun parasitized silver fish because they resemble the melanic genotype, which is larger and has a larger mating organ.

US$19.90

DOI: 10.1656/058.012.0116


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Marini, R.P.; Muthupalani, S.; Shen, Z.; Buckley, E.M.; Alvarado, C.; Taylor, N.S.; Dewhirst, F.E.; Whary, M.T.; Patterson, M.M.; Fox, J.G., 2010: Persistent infection of rhesus monkeys with 'Helicobacter macacae' and its isolation from an animal with intestinal adenocarcinoma. A novel helicobacter, 'Helicobacter macacae', was previously isolated from a colony of rhesus and cynomolgus monkeys in which diarrhoea from chronic idiopathic colitis was enzootic. A survey performed in a second colony of rhesus monkeys...

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Hsu, T.C.; Hooks, C.A.; Pomerat, C.M., 1953: Opportunities for determining sex in human tissues. Texas Reports on Biology and Medicine 11(4): 585-587

Degise, Robert, F., 1977: Recognizing--and overcoming--defensive communication. The dynamics of a successful communicative process and the negative effects of "defensiveness" on good interpersonal relations are explored. The outcome of open communication is the continuing ability to communicate ideas, values, and go...

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Awan, M.F.M.; Maciejewska, U.; Kleczkowski, K.; Wielgat, B., 1997: Differential responses of potato cell suspensions to a culture filtrate of Phytophthora infestans. General (polygenic) resistance of plant hosts to an attack by a range of pathogens is an important feature of plant defense responses against the infection. In search of biochemical markers defining this resistance, cell suspensions derived from l...

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Phelps, J.; Mcginnes, E.J., 1983: Growth-quality evaluation of black walnut wood. III. An anatomical study of color characsteristics of black walnut veneer. Wood and fiber science 15(3): 212-218

Dekker, A.W.; Nieuwenhuis, H.K.; Verdonck, L.F., 1990: Intermediate-dose cytosine arabinoside and amsacrine. An effective regimen with low toxicity in refractory acute nonlymphocytic leukemia. Results of remission induction therapy in refractory acute nonlymphocytic leukemia (ANLL) has been improved since the introduction of high-dose cytosine arabinoside. However, the toxicity of these regimens attributes to an early death rate of abou...