Martin Varisco

Martin Varisco
National University of Patagonia San Juan Bosco | UNPSJB · Instituto de Desarrollo Costero

PhD

About

30
Publications
3,994
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209
Citations
Citations since 2016
16 Research Items
174 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
Additional affiliations
June 2006 - present
National University of Patagonia San Juan Bosco
Position
  • Researcher

Publications

Publications (30)
Chapter
Species are connected with others via trophic and non-trophic relationships; thus any effect of global change (GC) on one species may consequently impact others by changing the direction and/or the strength of biological interactions. In this chapter, we explore through study cases how GC drivers may affect the composition and structure of marine P...
Article
This study analysed differences in the timing of egg extrusion, reproductive investment and spatial distribution between primiparous and multiparous females of the southern king crab (SKC) Lithodes santolla. Early publications had reported that, in the San Jorge Gulf (SJG; 45–47°S), Argentina, SKCs mated annually, mainly in December. In this work,...
Article
Full-text available
El Golfo San Jorge (GSJ) fue incluido como una de las áreas geográficas prioritarias en el marco de la Iniciativa Pampa Azul por ser una de las regiones más productivas y con mayor diversidad del Mar Argentino. La región es clave en el ciclo de vida de los recursos pesqueros más importantes de Argentina y cuenta con áreas protegidas destinadas a la...
Article
Full-text available
The female reproductive output and potential recruitment were studied in three Argentinean southern king crab (Lithodes santolla and Lithodes confundens) stocks: in the Beagle Channel (BC), under an artisanal fishery pressure since 1930; in the San Jorge Gulf (SJG), under 10-years industrial fishing exploitation; and off the Atlantic coast of Isla...
Article
The southern king crab (SKC), Lithodes santolla, supports a lucrative fishery in San Jorge Gulf (SJG), Argentina and its adjacent area in the southwestern Atlantic Ocean. However, despite its commercial value, biological data on the SKC in SJG are scarce. In this study, we analyzed the growth of early juvenile SKCs by combining field and laboratory...
Article
The squat lobster Munida gregaria has been recognized as a potential resource in several countries. However, data about its composition and nutritional value are scarce. This study provides information about the nutrients and nutritional quality of M. gregaria meat. Meat yield, proximate composition, cholesterol content, and fatty acid (FA) and ami...
Article
The southern king crab (SKC) Lithodes santolla has supported a profitable fishery in the San Jorge Gulf (SJG) and adjacent area, Argentina, since 2004. This fishery allows landings only of males larger than 110 mm carapace length. Since large-male-only harvests have had a detrimental effect on the egg production of other king crab populations, here...
Article
Full-text available
ABSTRACT. Anthropogenic pressures on coastal and marine ecosystems are increasing. Current development of spatiotemporal models will improve understanding of how changes to biodiversity distribution resulting from such pressures might affect ecosystem functioning. The objective of this study was to characterize the spatial distribution of benthic b...
Article
Full-text available
The aim of this study was to investigate the patterns of nematode diversity and community structure in San Jorge Gulf, Argentina, in order to improve knowledge of this key group of organisms. Free-living marine nematodes were sampled at 13 stations in February 2014 during an expedition aboard R/V Coriolis II. We found a total of 188 species (101 of...
Article
Full-text available
This communication describes the first records of byssal hairs on the postlarvae shells of Mytilusedulisplatensis d’Orbigny, 1842. The postlarvae used in this study were sampled on artificial collectors used for mussel culture in San Jorge Gulf, Sudoccidental Atlantic Ocean. A general description of the hairs is made as well as an exploratory analy...
Article
The Southern King Crab (SKC), Lithodes santolla, has supported a growing fishery in San Jorge Gulf (Patagonia, Argentina) since 2011. This fishery is developed by vessels called crabbers. SKC is also caught as bycatch in the Patagonian shrimp fishery, a major crustacean fishery in the Southwestern Atlantic Ocean. In this work, we characterized SKC...
Poster
Full-text available
This poster presents the results on functional diversity analyses for benthic communities in San Jorge Gulf, Argentina
Article
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In the present study we compared meat yield, proximate chemical composition and fatty acid profile of the blue mussel Mytilus edulis from rocky shores and long line cultures in San Jorge Gulf, Argentina. Moisture, ash, lipids, proteins and carbohydrates were quantified. The fatty acid profile was analyzed by gas chromatography. Mussels from rocky s...
Article
Full-text available
In the present study we compared meat yield, proximate chemical composition and fatty acid profile of the blue mussel Mytilus edulis from rocky shores and long line cultures in San Jorge Gulf, Argentina. Moisture, ash, lipids, proteins and carbohydrates were quantified. The fatty acid profile was analyzed by gas chromatography. Mussels from rocky s...
Article
The Halicarcinus planatus populations of the southwestern Atlantic Ocean show a highly variable sex ratio and a large size overlapping between females in the last immature instar (ADO) and mature (MAT) females. We hypothesized that these facts are related and that female impregnation has a central role in this relation. Non-impregnated ADO females...
Poster
Full-text available
In this poster, we present the objectives and methodology for a study on benthic communities in San Jorge Gulf, Argentina
Article
Full-text available
Squat lobsters are recognized as potential fishery resources in many countries. Squat lobster Munida gregaria is an important component of the bycatch in trawling fisheries of Argentinian Patagonia. The frequency of occurrence (FO), relative abundance (RA) and fate of the incidental catch of M. gregaria in: a) double-beam trawler fleet (63579 hauls...
Article
Full-text available
The growth and reproduction investment of the young of the year (0+) of the squat lobster Munida gregaria in San Jorge Gulf, Argentina, were analysed. Moult cycle and size frequency distribution were studied in monthly field samples. Experiments to determine moult increments and intermoult duration were conducted. Sexual maturity, fecundity and rep...
Article
Full-text available
The aim of the present study was to analyse the feeding strategy and spatial distribution of the spider crab Leucippa pentagona in Bahía Bustamante (Patagonia, Argentina). Several microhabitat variables that could influence the spatial distribution of this crab were related to its different life stages by using redundancy analysis. Regarding its fe...
Article
Full-text available
Stomach content analysis was performed on 313 juveniles of Lithodes santolla, with carapace lengths (CL) measuring between 8.40 and 49.04 mm. The influence of season, sex, size and moult stage on their diet were studied. Crabs were captured seasonally from the rocky sublittoral zone in the central area of San Jorge Gulf using SC-UBA. The frequency...
Article
Full-text available
Stomach content analysis was performed on 313 juveniles of Lithodes santolla, with carapace lengths (CL) measuring between 8.40 and 49.04 mm. The influence of season, sex, size and moult stage on their diet were studied. Crabs were captured seasonally from the rocky sublittoral zone in the central area of San Jorge Gulf using SCUBA. The frequency o...
Article
Full-text available
Sizes at maturity, breeding period, and fecundity of the spider crab Leucippa pentagona in Bustamante Bay, Argentina (45.11 degrees S, 66.56 degrees W) were analyzed. Specimens were collected monthly between May 2006 and February 2008. The size at morphometric maturity was determined based on relative changes in cheliped length for males and abdome...
Article
Full-text available
Sizes at maturity, breeding period, and fecundity of the spider crab Leucippa pentagona in Bustamante Bay, Argentina (45.11°S, 66.56°W) were analyzed. Specimens were collected monthly between May 2006 and February 2008. The size at morphometric maturity was determined based on relative changes in cheliped length for males and abdomen width for fema...
Article
The settlement and recruitment of the small brachyuran crab Halicarcinus planatus from the central area of Golfo San Jorge, south-western Atlantic Ocean, was studied. Three different artificial collectors were evaluated: smooth-surface panels, panels covered with synthetic lawn and ballasted plastic boxes filled with remains of fishing nets. In add...
Article
We estimated the prevalence of the bopyrid Pseudione galacanthae parasitizing the population of the squat lobster Munida gregaria in San Jorge Gulf and analysed some aspects concerning the effect of the parasite on host reproductive potential. The relationship between the development stages of the parasite and the host size was also analysed. The s...
Article
Full-text available
The area encompassing San Jorge gulf and surroundings is one of the most important fishing grounds in Argentina. Heavy fishing pressure affects the dynamics of natural communities. The discards of low commercial value species may have an impact on benthic-demersal communities by increasing the amount of organics in the seafloor. This accumulation i...
Article
The area encompassing San Jorge gulf and surroundings is one of the most important fishing grounds in Argentina. Heavy fishing pressure affects the dynamics of natural communities. The discards of low commercial value species may have an impact on benthic-demersal communities by increasing the amount of organics in the seafloor. This accumulation i...
Article
Full-text available
The "langostilla", Munida gregaria, also called lobster krill or squat lobster, is a very common galatheid crustacean in San Jorge Gulf and around the southern tip of South America. Previous studies have shown that this species plays an important role in the trophic webs wherever it has been studied. In order to determine its natural food sources,...

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