María Yanina Pasquevich

• National University of La Plata

Analysis of fatty acid composition can provide information about the effect of anthropogenic activities on the trophic choices of different species, including seabirds. The Olrog’s Gull Larus atlanticus, a threatened species found along the coast of Buenos Aires Province, Argentina, exhibits carcinophagus feeding habits. However, its association wi...

The relationship between protein stability and functional evolution is little explored in proteins purified from natural sources. Here we investigate a novel family of egg proteins (Perivitellin-1, PV1) from Pomacea snails. Their remarkable stability and clade-related functions in most derived clades (Canaliculata and Bridgesii) make them excellent...

The relationship between protein stability and function evolution in nature has not been explored in detail. We investigate this fundamental question by characterizing the Perivitellin-1 (PV1) orthologs within Pomacea snails. These highly stable egg carotenoproteins, crucial to the snail’s reproductive success, have acquired clade-related protectiv...

Los caracoles dulceacuícolas del género Pomacea (Ampullariidae) son gasterópodos nativos de América que depositan huevos calcáreos fuera del agua, exponiéndolos a la radiación solar, desecación aérea y depredadores terrestres. Estos huevos poseen un fluido perivitelino cuyas proteínas (perivitelinas) nutren y protegen al embrión. Los linajes ramifi...

Los caracoles dulceacuícolas del género Pomacea (Ampullariidae) son Gasterópodos nativos de América que depositan huevos calcáreos fuera del agua, quedando expuestos a la radiación solar, desecación aérea y depredadores terrestres. La llamativa coloración de los huevos está dada por carotenoides, que han sido asociados a funciones ecológicas, fisio...

In central-place foragers the breeding cycle is often the period with the highest energy cost, where dietary and stored lipids play a key role. Lipids are mobilized through blood lipoproteins providing fuel to tissues. Thus, the use of food and endogenous resources with high-energy fats is important to sustain individuals’ nutritional demands. To e...

Pomacea canaliculata and P. maculata are freshwater apple snails considered two of the most invasive alien species worldwide. They are expanding their ranges in Asia, Europe and North America, damaging crops, wetland ecosystems and endangering human health. Despite having different invasive potential, they have systematically been misidentified bec...

Plants have evolved sophisticated embryo defences by kinetically-stable non-digestible storage proteins that lower the nutritional value of seeds, a strategy that have not been reported in animals. To further understand antinutritive defences in animals, we analysed PmPV1, massively accumulated in the eggs of the gastropod Pomacea maculata, focusin...

The freshwater snails Pomacea Perry, 1810 lay conspicuous aerial egg clutches that are ignored by most predators. Egg biochemical defenses in the apple snail Pomacea canaliculata (Lamarck, 1822) are provided by multifunctional proteins. We analyzed the eggs of a sympatric species, Pomacea maculata Perry, 1810, studying the gross composition, toxici...

Apple snails (Ampullariidae) are among the largest and most ecologically important freshwater snails. The introduction of multiple species has reinvigorated the field and spurred a burgeoning body of research since the early 1990s, particularly regarding two species introduced to Asian wetlands and elsewhere, where they have become serious agricult...

While invertebrates store neutral lipids as their major energy source, little is known about triacylglycerol (TAG) class composition and their differential catabolism in aquatic arthropods. This study focuses on the composition of the main energy source and its catabolism by lipase from the midgut gland (hepatopancreas) of the crustacean Macrobrach...

To better understand how glycans contribute to the multiple roles of perivitellins in embryo development, the carbohydrate moieties and glycoforms of the carotenoglycoproteins ovorubin and scalarin from the eggs of Pomaceacanaliculata (Lamarck, 1822) and Pomaceascalaris (d'Orbigny, 1835) were studied. All subunits of both proteins are glycosylated...

The shuttle system that mediates the transport of fatty acids across the mitochondrial membrane in invertebrates has received little attention. Carnitine O-palmitoyltransferase I (EC 2.3.1.21; CPT I) is a key component of this system that in vertebrates controls long-chain fatty acid beta-oxidation. To gain knowledge on the acyltransferases in aqua...