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Maternal investment evolves with larger body size and higher diversification rate in sharks and rays
Maternal investment evolves with larger body size and higher diversification rate in sharks and rays Christopher G Mull, Matthew W Pennell, Kara E Yopak, Nicholas K Dulvy ABSTRACT: Across vertebrates, live-bearing has evolved at least 150 times from the ancestral state of egg-laying into a diverse array of forms and degrees of prepartum maternal investment.
Cryptic Behaviors and Post-capture Recovery Processes: New Insights From a Threatened Marine Apex Predator
Cryptic Behaviors and Post-capture Recovery Processes: New Insights From a Threatened Marine Apex Predator Richard Grainger, David Raubenheimer, Victor M. Peddemors, Paul A. Butcher, Gabriel E. Machovsky-Capuska ABSTRACT: Multisensor biologging provides a powerful tool for ecological research, enabling fine-scale observation of animals to directly link physiology and movement to behavior across ecological contexts. However, applied
Mode of uterine milk secretion in the white shark
Mode of uterine milk secretion in the white shark Taketeru Tomita, Masaru Nakamura, Ryo Nozu, Nobuhiro Ogawa, Minoru Toda, Keiichi Sato ABSTRACT: Examination of the uterus of a dead female white shark (Carcharodon carcharias), which contained the earliest known white shark embryos, revealed that the uterine wall produces lipid-rich secretion (histotroph or “uterine milk”) for