{"product_id":"evolution-and-speciation-in-animals-t-j-pandian-9781032009209","title":"Evolution and Speciation in Animals","description":"\u003cp\u003eThis book represents the first attempt to quantify environmental factors and life history traits that accelerate or decelerate species diversity in animals. About 15%, 8% and 77% of species are distributed in marine (70% of earth's surface), freshwater (terra firma fosters more diversity. The harsh hadal, desert and elevated montane habitats restrict diversity to 0.5-4.2%. Costing more time and energy, osmotrophic and suspension modes of food acquisition limit diversity to \u003c\/p\u003e\u003cp\u003eSelfing hermaphrodites (0.9%), parthenogens ( \u003c\/p\u003e\u003cp\u003eIncidence of heterogamety is four-times more in males than in females. Hence, evolution is more a male-driven process. Egg size is determined by environmental factors, but lecithality is genetically fixed. In poikilotherms, sex is also determined by gene(s), but differentiation by environmental factors. The extra-ovarian vitellogenesis (\u0026gt; 96%), spermatozoan (81%) rather than spermatophore mechanism of sperm transfer, promiscuity and polygamy over monogamy, iteroparity (99.6%) over semelparity and internal fertilization (84%) are preferred, as they accelerate diversity. Body size and egg size determine fecundity. Indirect life cycle (82%) and incorporation of feeding larval stages accelerate diversity. Brooding and viviparity (6.4%) decelerate it. Parasitism extends life span and liberates fecundity from eutelism.\u003c\/p\u003e \u003cp\u003eEvolution is an ongoing process, and speciation and extinction are its unavoidable by-products. The in-built conservation mechanism of reviving life after a sleeping duration has been reduced from a few million years in microbial spores to a few thousand years in plant seeds and a few hundred years in dormant eggs in animals. Hence, animal conservation requires priority. The existence of temperature-resistant\/insensitive individuals, strains and species shall flourish during the ongoing global warming and earth shall continue with such burgeoning species, hopefully inclusive of man.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e T. J. Pandian\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 1032009209\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781032009209\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e CRC Press\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 09\/25\/2023\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 334\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 1.07lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.21h x 6.14w x 0.72d","brand":"T. J. Pandian","offers":[{"title":"Paperback","offer_id":44321333477631,"sku":"9781032009209","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_765c2365-3284-4b8c-934c-d179757b9ac4.jpg?v=1696330352","url":"https:\/\/www.whiterainbookhouse.com\/products\/evolution-and-speciation-in-animals-t-j-pandian-9781032009209","provider":"WR Book House","version":"1.0","type":"link"}