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Full-Text Articles in Animal Sciences
Sex And Seasonal Differences In Diet And Nutrient Intake In Verreaux's Sifakas (Propithecus Verreauxi), Flávia Koch, Joerg U. Ganzhorn, Jessica M. Rothman, Colin A. Chapman, Claudia Fichtel
Sex And Seasonal Differences In Diet And Nutrient Intake In Verreaux's Sifakas (Propithecus Verreauxi), Flávia Koch, Joerg U. Ganzhorn, Jessica M. Rothman, Colin A. Chapman, Claudia Fichtel
Publications and Research
Fluctuations in food availability are a major challenge faced by primates living in seasonal climates. Variation in food availability can be especially challenging for females, because of the high energetic costs of reproduction. Therefore, females must adapt the particular demands of the different reproductive stages to the seasonal availability of resources. Madagascar has a highly seasonal climate, where food availability can be extremely variable. We investigated the seasonal changes in diet composition, nutrient and energy intake of female and male sifakas (Propithecus verreauxi) in a dry deciduous forest in western Madagascar. We examined how females adjust their diet to different …
Do Female Western Mosquitofish, Gambusia Affinis, Prefer Ornaments That Males Lack?, Scott L. Kight, Olga Degtyareva, Heather Fackelman, Ariel Casner
Do Female Western Mosquitofish, Gambusia Affinis, Prefer Ornaments That Males Lack?, Scott L. Kight, Olga Degtyareva, Heather Fackelman, Ariel Casner
Department of Biology Faculty Scholarship and Creative Works
Some species in the family Poeciliidae are known for extravagant male ornaments and courtship behavior (e.g. guppies), but the majority of poeciliids are characterized by coercive male copulation attempts that seem to circumvent female choice. In some lineages with male ornaments, female sensory bias may have preceded the evolution of corresponding male signals. We examined female preferences for colorful ornaments in Western mosquitofish, Gambusia affinis, in which males lack ornamentation and reproduce primarily through coercive mating attempts. We found that females exhibited a positional affinity for males that were artificially ornamented with blue coloration over males that had been …
An Investigation On Some Biological And Reproduction Characteristics Oferiphia Verrucosa (Forskål, 1775) In The South Black Sea (Turkey), Uğur Karadurmuş, Mehmet Aydin
An Investigation On Some Biological And Reproduction Characteristics Oferiphia Verrucosa (Forskål, 1775) In The South Black Sea (Turkey), Uğur Karadurmuş, Mehmet Aydin
Turkish Journal of Zoology
In this study, a total of 1360 specimens of Eriphia verrucosa were collected from the South Black Sea region of Turkey between February 2012 and January 2013 to determine their biological and reproductive characteristics. The overall sex ratio of all individuals was calculated as 1:0.42 (M/F). The mean carapace width was determined as 6.76, 5.57, and 5.62 cm for males, nonovigerous, and ovigerous females, respectively. The minimum and maximum weight was recorded as 4.07 and 301.4 g for both sexes. The highest correlation between morphological characteristics was determined for carapace length and crab weight in nonovigerous females (R2 = 0.973; …