The use of uterine scars to explore fecundity levels in invasive alien
... mass < 240 g and dry eye-lens weight ≤ 13 mg), and as a proxy for age in both species (e.g. Beale, 1962). Since, in populations at low density, grey squirrels are capable of breeding already when 7-8 months-old (Gurnell et al., 2001), we did not use eye lens weight, nor body mass, to exclude animals ...
... mass < 240 g and dry eye-lens weight ≤ 13 mg), and as a proxy for age in both species (e.g. Beale, 1962). Since, in populations at low density, grey squirrels are capable of breeding already when 7-8 months-old (Gurnell et al., 2001), we did not use eye lens weight, nor body mass, to exclude animals ...
GUINEA PIGS FOR MEAT PRODUCTION
... established by experience early in the life of the cavy, and it has been suggested that this is associated with the particular microorganisms that become established in the intestinal tract. Nevertheless, personal experience suggests that cavies can acquire new preferences. They are much more likely ...
... established by experience early in the life of the cavy, and it has been suggested that this is associated with the particular microorganisms that become established in the intestinal tract. Nevertheless, personal experience suggests that cavies can acquire new preferences. They are much more likely ...
Microtus ochrogaster
... The Prairie vole is monogamous, a female and male share the same nest and home range, and remain together for life. Males exclude other males from the home range through aggression. Both, mother and father, care for the young. Prairie voles breed during the spring, summer, fall, and mild winters. Lo ...
... The Prairie vole is monogamous, a female and male share the same nest and home range, and remain together for life. Males exclude other males from the home range through aggression. Both, mother and father, care for the young. Prairie voles breed during the spring, summer, fall, and mild winters. Lo ...
The Primates of Sri Lanka
... One group of animals which will benefit from this will be our close genetic cousins, the primates. For ethical and scientific reasons we should conserve the island’s primates, at least five species, based on current scientific thinking. There are also moral reasons. We share an evolutionary heritage ...
... One group of animals which will benefit from this will be our close genetic cousins, the primates. For ethical and scientific reasons we should conserve the island’s primates, at least five species, based on current scientific thinking. There are also moral reasons. We share an evolutionary heritage ...
spider monkey fact sheet - World Animal Foundation
... supervision and mental stimulation. They usually require a large amount of attention. Monkeys cannot handle being away from their owners for long periods of time, such as family trips for example, due to their need of attention. Bored monkeys can become extremely destructive and may even go so far a ...
... supervision and mental stimulation. They usually require a large amount of attention. Monkeys cannot handle being away from their owners for long periods of time, such as family trips for example, due to their need of attention. Bored monkeys can become extremely destructive and may even go so far a ...
Reproductive versus ecological advantages to larger body size in
... can find an organism in which reproductive and nonreproductive phases are separated into discrete individual categories. Ideally, this separation should occur without major modifications of the habitat exploited, either in terms of space (e.g., no great variation in predatory pressures or diet) or t ...
... can find an organism in which reproductive and nonreproductive phases are separated into discrete individual categories. Ideally, this separation should occur without major modifications of the habitat exploited, either in terms of space (e.g., no great variation in predatory pressures or diet) or t ...
Long-Tailed Weasel - Vermont Fish and Wildlife
... inches in length and three to 16 ounces in weight. It is also known for its long, sharp and powerful canines, which allows it to be a successful predator. ...
... inches in length and three to 16 ounces in weight. It is also known for its long, sharp and powerful canines, which allows it to be a successful predator. ...
Assortative mating among animals of captive and wild origin
... consideration. After just three generations in captivity, we found that captive–captive and wild–wild pairs accounted for 83% of all offspring produced, inferring strong assortative mating between animals in relation to their origin. Multiple causes for the observed assortative mating are possible [ ...
... consideration. After just three generations in captivity, we found that captive–captive and wild–wild pairs accounted for 83% of all offspring produced, inferring strong assortative mating between animals in relation to their origin. Multiple causes for the observed assortative mating are possible [ ...
Color and Communication in Habronattus Jumping Spiders: Tests of
... Differences between males and females can evolve through a variety of mechanisms, including sexual and ecological selection. Because coloration is evolutionarily labile, sexually dichromatic species are good models for understanding the evolution of sex differences. While many jumping spiders exhibi ...
... Differences between males and females can evolve through a variety of mechanisms, including sexual and ecological selection. Because coloration is evolutionarily labile, sexually dichromatic species are good models for understanding the evolution of sex differences. While many jumping spiders exhibi ...
The love-darts of land snails: integrating physiology, morphology
... dart in increasing male reproductive success. Nevertheless, caution is needed when generalizing the use and effects of the love-dart, which are predominantly based on one model organism. ...
... dart in increasing male reproductive success. Nevertheless, caution is needed when generalizing the use and effects of the love-dart, which are predominantly based on one model organism. ...
Life History Patterns and the Comparative Social Ecology of
... communication). Male breeding coalitions appear to contain nonrelatives more frequently than was previously thought (234); males are typically unrelated to pride females. [Comparative data can be found in Eaton (77-80).] LIFE HISTORY PATTERNS Interspecific Comparisons Cross-species comparisons of l ...
... communication). Male breeding coalitions appear to contain nonrelatives more frequently than was previously thought (234); males are typically unrelated to pride females. [Comparative data can be found in Eaton (77-80).] LIFE HISTORY PATTERNS Interspecific Comparisons Cross-species comparisons of l ...
The evolution of non-maternal caretaking among anthropoid
... We used the assessments of researchers who studied individual species in the wild to assign each to dichotomous allocaretaking and maternal categories. Our categories were defined on the basis of whether nonmaternal conspecifics frequently carried, provisioned, guarded, or nursed infants, and agree ...
... We used the assessments of researchers who studied individual species in the wild to assign each to dichotomous allocaretaking and maternal categories. Our categories were defined on the basis of whether nonmaternal conspecifics frequently carried, provisioned, guarded, or nursed infants, and agree ...
132 Florida Entomologist 80(2)
... thought to be aposematic. Arrow (1951) recorded an instance where one of the African ball-rolling beetles Gymnopleurus virens, which is bright green, blue, or crimson, was shown to induce nausea in a captive baboon. Furthermore, this beetle is usually found in association with 2 other similarly colo ...
... thought to be aposematic. Arrow (1951) recorded an instance where one of the African ball-rolling beetles Gymnopleurus virens, which is bright green, blue, or crimson, was shown to induce nausea in a captive baboon. Furthermore, this beetle is usually found in association with 2 other similarly colo ...
insects and freshwater fish
... There are several different stick insects on Tiritiri Matangi but they are so well camouflaged that you will be lucky to see any, and the fact that they are usually only active at night makes it even more difficult. Stick insects can be brown, green or grey, and their bodies can be smooth or prickl ...
... There are several different stick insects on Tiritiri Matangi but they are so well camouflaged that you will be lucky to see any, and the fact that they are usually only active at night makes it even more difficult. Stick insects can be brown, green or grey, and their bodies can be smooth or prickl ...
The mating system of the brown bear Ursus arctos
... choice (Shuster & Wade 2003, Shuster 2009). Over 90% of mammalian species are polygynous, and the energetic investments in gametes and rearing offspring are typically larger for females than for males, especially in the absence of paternal care (Orians 1969, Trivers 1972, Clutton-Brock 1989, Anderss ...
... choice (Shuster & Wade 2003, Shuster 2009). Over 90% of mammalian species are polygynous, and the energetic investments in gametes and rearing offspring are typically larger for females than for males, especially in the absence of paternal care (Orians 1969, Trivers 1972, Clutton-Brock 1989, Anderss ...
- Central Marine Fisheries Research Institute
... The cuttlefishes belonging to the family Sepiidae are of significant commercial value to artisanal and industrial fisheries. Cuttlefishes are primarily bottom-dwellers over a range of habitats, including rocky, sandy, and muddy substrates, seagrass, seaweed and coral reefs. They are slower swimmers ...
... The cuttlefishes belonging to the family Sepiidae are of significant commercial value to artisanal and industrial fisheries. Cuttlefishes are primarily bottom-dwellers over a range of habitats, including rocky, sandy, and muddy substrates, seagrass, seaweed and coral reefs. They are slower swimmers ...
Goniopsis cruentata (Mangrove Root Crab)
... FOOD AND FEEDING. The food chain relationship among mangrove root crabs is important as they display both predator and prey qualities. Mangrove root crabs provide food for other species and by eating leaf litter and organic material around the mangrove roots, they contribute to the recycling of nutr ...
... FOOD AND FEEDING. The food chain relationship among mangrove root crabs is important as they display both predator and prey qualities. Mangrove root crabs provide food for other species and by eating leaf litter and organic material around the mangrove roots, they contribute to the recycling of nutr ...
Ecology and Reproductive Characteristics of the Skink
... adopted a type I error level of 0.05 for all statistical tests. RESULTS Descriptions of lizard activities Most S. incognitus individuals were first observed in a leaf litter microhabitat or at the edge of the forest. Nearly 79.5% (n = 70, including both males and females) of individuals were observe ...
... adopted a type I error level of 0.05 for all statistical tests. RESULTS Descriptions of lizard activities Most S. incognitus individuals were first observed in a leaf litter microhabitat or at the edge of the forest. Nearly 79.5% (n = 70, including both males and females) of individuals were observe ...
Moth or Butterfly? - Wet Tropics Management Authority
... The largest Australian Moth is the Hercules Moth and it lives in the tropical rainforests. It has a wing span of about 25cm. The males are smaller than the females. They are brown with tapering tail-like hind wings. The female Hercules produces chemicals to attract males. The males detect the female ...
... The largest Australian Moth is the Hercules Moth and it lives in the tropical rainforests. It has a wing span of about 25cm. The males are smaller than the females. They are brown with tapering tail-like hind wings. The female Hercules produces chemicals to attract males. The males detect the female ...
Animal Reproduction - Smyth County Schools
... • Joining of sperm & egg inside the body after mating – Ensures selection of mate (not random); promotes diversity – Parents protect and care for young – Does not require water; can occur on land – Less sex cells produced; increases probability of successful reproduction – Common in birds, reptiles ...
... • Joining of sperm & egg inside the body after mating – Ensures selection of mate (not random); promotes diversity – Parents protect and care for young – Does not require water; can occur on land – Less sex cells produced; increases probability of successful reproduction – Common in birds, reptiles ...
Katie Perryman
... generate heat. They spend the coldest and hottest parts of the day underground. C. villosus shifts activity to forage in the warm mid-day or the cool and moist evening, but they are mostly nocturnal. The large hairy armadillo may have extensive burrow systems (MacDonald 2001). They occupy burrows fo ...
... generate heat. They spend the coldest and hottest parts of the day underground. C. villosus shifts activity to forage in the warm mid-day or the cool and moist evening, but they are mostly nocturnal. The large hairy armadillo may have extensive burrow systems (MacDonald 2001). They occupy burrows fo ...
Reproduction - cloudfront.net
... Reproduction: “Good” traits are passed on and strengthen the species which increases their survival rate. ...
... Reproduction: “Good” traits are passed on and strengthen the species which increases their survival rate. ...
A View of Life
... Sexual selection refers to changes in females and males, often due to differential reproductive success, caused by mate choice and competition for mates. ...
... Sexual selection refers to changes in females and males, often due to differential reproductive success, caused by mate choice and competition for mates. ...
PDF
... 1999). A similar mechanism is often assumed to operate in other species of beetle outside of the Onthophagus genus, yet only one other species has been studied. Iguchi (1998) showed that in the Dynastine beetle, Allomyrina dichtoma septentrionalis, morph determination also appears to be related to l ...
... 1999). A similar mechanism is often assumed to operate in other species of beetle outside of the Onthophagus genus, yet only one other species has been studied. Iguchi (1998) showed that in the Dynastine beetle, Allomyrina dichtoma septentrionalis, morph determination also appears to be related to l ...
Growth, Survival, and Reproduction in a Northern Illinois Population
... captive reared animals were similar in size to snakes of the same age that had been released at birth and so were included in the analyses presented here. Additionally, some female snakes were held captive for up to 21 weeks prior to and following parturition. Their growth rates were similar to thos ...
... captive reared animals were similar in size to snakes of the same age that had been released at birth and so were included in the analyses presented here. Additionally, some female snakes were held captive for up to 21 weeks prior to and following parturition. Their growth rates were similar to thos ...