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Publications (27)
Freshwater environments and coastal marine areas provide key ecosystem services to society and serve as habitats for biodiversity. However, they face major challenges from human activities and climate factors, leading to global degradation. The effect of these agents depends on geographic location and climate, among other factors. To comprehensivel...
Olivancillaria carcellesi occurs in shallow sandy shores from north Patagonia, in intertidal and subtidal sandy bottoms. Females of O. carcellesi exhibited a remarkable specificity for spawning on the shells of living males and females, indiscriminately, of the buccinanopsid Buccinastrum deforme , measuring 26.9 ± 4.7 mm in shell length. The egg ca...
Environmental temperature is increasing while natural populations are forced to develop their life cycle under new conditions, resulting in the expression of new phenotypic traits. Still, the links between these new environmental conditions and the subsequent phenotypic expressions are not fully explored. Here, we conducted manipulative experiments...
Upwelling phenomena alter the physical and chemical parameters of the sea’s subsurface waters, producing low
levels of temperature, pH and dissolved oxygen, which can seriously impact the early developmental stages of
marine organisms. To understand how upwelling can affect the encapsulated development of the gastropod
Acanthina monodon, capsules c...
The temporary loss of an animal feeding structure can often be replaced by a new one. During that replacement period, however, the animal can be limited in its ability to feed. The muricid gastropod Acanthina monodon can sometimes lose its labral tooth naturally; recovering the tooth will typically take between 14 and 21 days. Our studies show that...
Intracapsular embryonic development in the intertidal zone exposes embryos to various stress sources characteristic of this environment, including UV-R. They require defensive mechanisms to mitigate its adverse effects. The presence of total carotenoids (TC), and mycosporine-like amino acids (MAAs) was studied in adults, in encapsulated embryos, an...
Undaria pinnatifida is a brown algae native to Asia that has settled in various regions worldwide, periodically contributing with large quantities of C and nutrients during its annual cycle. In this work, we analyzed a coastal site in Patagonia (Argentina) that has been colonized for three decades by U. pinnatifida, focusing on associated microbial...
Marine gastropods are a popular seafood, abundant along coastal shores and healthy for human consumption. We studied variations in nutritional components during the gonadal cycle of Tegula patagonica, a novel gastropod resource protected by a recent artisanal fishery regulation. Similar to other marine gastropods consumed worldwide, T. patagonica w...
Siphonariids are pulmonate gastropods inhabiting rocky intertidal habitats, and many studies have focused on these false limpets around the world. In the southern South Atlantic, studies on reproduction and development in species of Siphonaria are scarce. We studied the embryonic development and egg masses of Siphonaria lateralis at its northernmos...
The limpet Siphonaria lessonii is very common along Atlantic Patagonian intertidal rocky shores. We studied the early intracapsular embryonic development of this limpet in detail in two populations in north Patagonia, with different environmental conditions (i.e. wave exposure, wind, temperature). Early development in both populations was achieved...
Intracapsular embryonic development is common in marine gastropods. In many species,
embryos obtain nutrition during ontogeny by ingesting substances contained in the intracapsular
fluid. South American volutids spawn egg capsules containing relatively few eggs,
and development is entirely intracapsular, with young hatching as crawl-away juveniles....
Intracapsular embryonic development is common in marine gastropods. In many species, embryos obtain nutrition during ontogeny by ingesting substances contained in the intracapsular fluid. South American volutids spawn egg capsules containing relatively few eggs, and development is entirely intracapsular, with young hatching as crawl-away juveniles....
Buccinanops globulosus mated all year round, with higher frequency from May to September, prior to spawning months. Gravid females were found between October and March. Oviposition peaked during rising temperatures and longest daylength while hatching peaked with high water temperature and declining daylength. Gravid females measured between 20 and...
Life history parameters, including size-age, production, mortality and size at reproductive maturity, were studied on the edible snail Adelomelon ancilla to provide useful management data. Stable oxygen isotope ratios confirmed semiannual formation of internal growth marks. Adelomelon ancilla can reach up to 20 years at a size of 170 mm, fitting to...
We studied the reproduction of Ophioplocus januarii from Playa Villarino (42° 24’ S, 64° 17’ W), based on monthly samples collected between April 2005 and April 2007. Gonad indices were generally synchronous for males and females with little seasonal pattern. The changes of the gonad index were not significantly correlated with day length or water...
The rocky shore of Punta Este, Golfo Nuevo (Patagonia, Argentina), was sampled by means of the standardized NaGISA (CoML) protocol, that was aimed to generate biodiversity baseline data in six levels, from high intertidal to 10 m depth. Based on the generated data, we analysed the benthic assemblage structure, species richness, mean abundance and t...
The carnivorous snail Adelomelon ancilla
usually carries, attached to its shell, the anemone Antholoba
achates, which also lives attached to hard substrates in
the same area. Interaction between both species was studied
by stable isotopes analyses (SIA), direct observations,
and analysis of gut contents. Results did not show evidences
of dietary ov...
Life history parameters, including size-age, production, mortality and size at reproductive maturity, were studied on the edible snail Adelomelon ancilla to provide useful management data. Stable oxygen isotope ratios confirmed semiannual formation of internal growth marks. Adelomelon ancilla can reach up to 18 years at a size of 150 mm, fitting to...
This study describes euspermatogenesis and paraspermatogenesis in Adelomelon ancilla (Volutidae) and compares them with the same processes in other caenogastropods. Spermatogenesis in A. ancilla followed the general developmental pattern of caenogastropods. The pattern of nuclear condensation involves granular, fibrillar,
lamellar and homogenous el...
The testes of Caenogastropoda typically produce two types of spermatozoa, euspermatozoa and paraspermatozoa. The structures of both morphological forms of sperm contribute to our understanding of reproductive biology, and also have been useful to elucidate taxonomic and phylogenetic relationships among gastropods. This article describes the ultrast...
The ultrastructure of the euspermatozoa and the paraspermatozoa is investigated in Adelomelon ancilla, through histological section observed by transmission electron microscopy. Euspermatozoa of A. ancilla consists of: (1) a conical acrosomal vesicle (with a short basal invagination, constricted anteriorly) which is flattened
at the apex and associ...
The edible volutid snail Adelomelon ancilla occurs on the Argentine coast and may have the capacity to serve as source of support for local fisheries. However, knowledge
of its reproduction is lacking. Over 3years (from September 2000 to July 2004) we studied the oviposition at Golfo Nuevo,
Patagonia by diving. Monthly collections were performed to...
I Jornadas Patagónicas de Biología y III Jornadas Estudiantiles de Ciencias Biológicas.
The testes of Caenogastropoda typically produce two types of spermatozoa, euspermatozoa and paraspermatozoa. The structures of both morphological forms of sperm contribute to our understanding of reproductive biology, and also have been useful to elucidate taxonomic and phylogenetic relationships among gastropods. This article describes the ultrast...
