Summary Several analytical decline-curve models have been developed recently for shale-gas wells (Ilk et al. 2008; Anderson 2010; Valko and Lee 2010). However, these authors did not quantify the uncertainty in production forecasts reserves estimates. This is important because most shale plays are early stages of virtually any method will large when there limited data available. Jochen Spivey (1996) Cheng (2010) bootstrap methods that can generate probabilistic decline uncertainty. Hindcasts...

ABSTRACT Crustacean fisheries have increased worldwide, leading to changes in fishing practices. In San Matias Gulf, Argentina, the Patagonian red shrimp replaced Argentine hake as main target since 2012. We analyzed this shift from 2004 2020 using vessel monitoring systems and landings. Fishing positions were identified speed rule. Gravitational centers of intensity used assess seasonal spatial fleet, bottom‐trawling footprint was quantify area seabed affected. Landings pooled monthly...

In the 1980s, Pacific oyster Magallana gigas (Thunberg, 1783) was deliberately introduced in southern region of Province Buenos Aires (Bahía Anegada, BA), Argentina. 2004, its presence expanded 80 km south Río Negro estuary along coast El Cóndor (EC). Although oysters have demonstrated dispersal capability, there is limited data as regards EC population since 2011. This research focusses on present M. encompassing distribution, abundance, and size structure a 180-km coastal line from to San...

Abstract Three out of the five threatened species sea turtle occurring in SW Atlantic Ocean are regularly found coastal waters Argentina: green (Chelonia mydas), loggerhead (Caretta caretta) and leatherback (Dermochelys coriacea) turtles. From 1995 to 2008, fishery beach surveys were carried along 2800 km coastline reports from public gathered. Incidental capture artisanal fisheries strandings suggest that an important concentration these occurs estuarine, highly productive areas Samborombón...

Abstract Understanding the recovery of whale populations is critical for developing population-management and conservation strategies. The southern right (SRW) Eubalena australis was one baleen species that has experienced centuries exploitation. We assess here first time population dynamics SRW from southwestern Atlantic Ocean at regional level to measure numerically effect whaling estimate trend after depletion. reconstructed catch history period 1670–1973 by an extensive review different...

Figure S1. Length-frequency distribution of Argentine anchovy, E. anchoita, consumed by common dolphins, D. delphis, off North Patagonia. The sample set was split in two subsets: samples from San Matías Gulf and offshore areas. S2. South American long-fin squid, L. sanpaulensis, eaten dusky obscurus, S3. silver warehou, S. porosa, S4. obscurus. Patagonia collected Nuevo Please note: publisher is not responsible for the content or functionality any supporting information supplied authors. Any...

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 421:217-227 (2011) - DOI: https://doi.org/10.3354/meps08912 Modeling habitat use for dusky dolphin and Commerson’s in Patagonia Griselda V. Garaffo1,*, Silvana L. Dans2,3, Susana N. Pedraza2,3, Mariana Degrati2,3, Adrián Schiavini4,5, Raúl González6, Enrique A. Crespo2,3 1Universidad Nacional de Mar del...

Abstract Arps' deterministic decline curve analysis has been the industry standard for forecasting production and estimating reserves despite its subjectivity potentially large uncertainty, particularly early in well life. Probabilistic (PDCA) methods have proposed to quantify significant uncertainty estimation shale gas plays. However, all published PDCA methodologies tested using model. New (DCA) models developed hydraulically fractured horizontal wells. these primarily applied...

The aim of this study was to evaluate the dietary composition Patagonian seahorse Hippocampus patagonicus in San Antonio Bay, Patagonia, Argentina. To end, analyses stomach and gut contents were carried out diet compared potential preys available natural environment. Samples collected from different places a Marine Protected Area Matías Gulf. Type number prey present digestive tracts registered frequency occurrence (%FO) (%N) calculated for each area. Amphipods (Gammaridae, Caprellidae...

The diet composition and feeding strategy of the Argentine hake Merluccius hubbsi in San Matías Gulf were analysed order to use this information for sustainable management fishery. behaved as an opportunistic predator. Small M. consumed planktonic crustaceans, whereas medium large fish ate numerous prey taxa with low frequency occurrence variable specific abundance. Intra- intercohort cannibalism detected all size groups particularly significant hubbsi. Medium-sized small conspecifics...

Abstract Time-series of fishing position, landings, satellite-derived sea-surface temperature and chlorophyll a concentrations were used to relate the spatial–temporal distribution Argentine hake Merluccius hubbsi with seasonal oceanographic processes in San Matías Gulf. Also, effect on population structure was analysed. During summer fleet concentrated over area frontal system, obtaining best catch-per-unit-effort (CPUE) relatively deep waters. In autumn, dispersion due reduction CPUE...

As world fisheries began to decline and massive collapses were observed, the competition between marine mammals became an issue of growing concern. San Matías Gulf (Patagonia, Argentina) is considered be a fishery ecosystem independent Argentine Continental Shelf waters, with particular oceanographic biological properties. semi-enclosed ecosystem, this gulf may generate scenarios for interactions demersal trawl fleet population South American sea lions Otaria flavescens . In paper, diet top...

Determining which factors contribute to the establishment and spread of an introduced species is a challenge with substantial management implications, especially when that found associated another species.Here, we report for first time presence two species, macroalga Undaria pinnatifida (Harvey) Suringar, 1873 clubbed tunicate Styela clava (Herdman, 1881), in San Antonio Bay (northern Patagonia), where apparent facilitation by may be contributing algae.Because S. ecosystem engineer acts as...

We surveyed the gastrointestinal tracts of 6 bottlenose dolphins Tursiops truncatus from Patagonia to check for helminth parasites and characterize dolphin diet. All harbored (6477 helminths). recorded 7 species, including nematodes Anisakis simplex s.l., Pseudoterranova decipiens, acanthocephalans Corynosoma cetaceum, C. australe, digeneans Braunina cordiformis, Pholeter gastrophilus Synthesium tursionis. Among gastric helminths, most prevalent species were cetaceum A. while australe S....

Abstract Several analytical decline curve models have been developed recently for shale gas wells (Anderson et al. 2010; Ilk 2008; Valko and Lee 2010). However, despite the considerable uncertainty associated with forecasting production, these authors either do not quantify reserves in or fail to demonstrate that their probabilistic forecasts are well calibrated. Jochen Spivey (1996) Cheng al.(2010) bootstrap methods can generate uncertainty. Forecasts Modified Bootstrap Method (Cheng 2010)...

Research on the ecology of sympatric dolphins has increased worldwide in recent decades. However, many dolphin associations such as that between common (Delphinus delphis) and dusky (Lagenorhynchus obscurus) are poorly understood. The present study was conducted San Matías Gulf (SMG) ecosystem (North Patagonia, Argentina) where a high diet overlap among both species found. main objective work to explore niche habitat temporal dimensions. specific aims were (a) evaluate use strategies through...