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Many animal species have specific mating (or breeding) periods e.g. (seasonal breeding) so that offspring are born or hatch at an optimal time. In marine species with limited mobility and external fertilisation like corals , sea urchins and clams , the timing of the common spawning is the only externally visible form of sexual behaviour.
Animal non-reproductive sexual behavior encompasses sexual activities that non-human animals participate in which do not lead to the reproduction of the species. Although procreation continues to be the primary explanation for sexual behavior in animals, recent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. [1]
Animal control agencies in the United States and the ASPCA advise that dogs not intended for further breeding should be spayed or neutered so that they do not have undesired puppies. [47] Spaying and castrating can decrease the risk of hormone-driven diseases such as mammary cancer, as well as undesired hormone-driven behaviors. [ 48 ]
In other species, males that are smaller than females have higher fitness. As such, many sex-specific morphological adaptations (for example, in Dytiscidae diving beetles, females have setose dorsal furrows that males do not and males have suction cups on their forelegs that females do not [18]) are sexual dimorphisms caused by sexual coercion.
This is a list of animals that have a naturally occurring hump or humps as a part of their anatomy. Humps may evolve, as a store of fat, as a heat control mechanism, as a development of muscular strength, as a form of display to other animals, or be apparent as a consequence of some behaviour such as the diving of whales. Enlarged humps have ...
On this Valentine's Day, here is a story of 94-year-old Don Barnett and his 93-year-old wife Marilyn, who have kept their love alive for 68 years with a musical elixir. Married nearly 7 decades ...
Papuan women with kinky hair. Kinky hair is a uniquely human characteristic, as most mammals have straight hair, including the earliest hominids. [11] Robbins (2012) suggests that kinky hair may have initially evolved because of an adaptive need amongst humans' early hominid ancestors for protection against the intense UV radiation of the sun in Africa.
Unnecessary Fuss is a film produced by People for the Ethical Treatment of Animals (PETA), showing footage shot inside the University of Pennsylvania's Head Injury Clinic in Philadelphia. The raw footage was recorded by the laboratory researchers as they inflicted brain damage to baboons using a hydraulic device.