By-catch of sharks in Patagonian coastal trawl fisheries

1998 ◽  
Vol 49 (7) ◽  
pp. 641 ◽  
Author(s):  
Silvina Van Der Molen ◽  
Guillermo Caille ◽  
Raúl González
Keyword(s):  
Central Zone ◽  
Squalus Acanthias ◽  
Coastal Fisheries ◽  
The North ◽  
Rio Negro ◽  
Palabras Clave ◽  
By Catch ◽  
Galeorhinus Galeus ◽  
Cetorhinus Maximus ◽  
Mustelus Schmitti

In coastal Patagonia, Argentina, an unknown number of species of sharks are frequently caught in bottom-trawl nets. Between 1993 and 1996, 454 trawls by Patagonian coastal fisheries (41˚–51˚S) were analysed; 264 included sharks. Of the seven species of sharks caught, the most frequent was the smoothhound Mustelus schmitti, mainly in Bahía Engaño (off Chubut). The argentine angelshark (Squatina argentina) and the tope (Galeorhinus galeus) were common in the north of Patagonia, the piked dogfish (Squalus acanthias) in the central zone, and the narrowmouthed catshark Schroederichthys bivius in the south. The broadnose sevengill shark (Notorhynchus cepedianus) was rarely caught. A single basking shark (Cetorhinus maximus) was caught in San Matías Gulf (off Río Negro). Although undesirable, the by-catch of sharks is growing as a result of the increase in the fishing activities of the region, and the sustainability of the shark populations in Patagonian coasts is a matter of concern. Resumen. En las costas de Patagonia, Argentina, un número desconocido de especies de tiburones son frecuentemente capturados en las redes de arrastre de fondo. Entre 1993 y 1996 se analizaron a bordo 454 lances de pesca en las pesquerías costeras de Patagonia, entre los 41 y 51˚S, y en 264 de ellos se registraron capturas de tiburones. De las siete especies de tiburones capturadas el mas frecuente fue el gatuzo Mustelus schmitti, principalmente en Bahía Engaño, frente a las costas de Chubut. El pez ángel Squatina argentina y el cazón vitamínico Galeorhinus galeus fueron comunes en el norte de Patagonia, el cazón espinoso Squalus acanthias en la zona central, y el tiburón pintarroja Schroederichthys bivius en el sur. El tiburón gatopardo Notorhynchus cepedianus resultó una especie rara en las capturas. En el Golfo San Matías, frente a las costas de Río Negro, se capturó un ejemplar de tiburón peregrino Cetorhinus maximus. Aunque no deseadas, las capturas de tiburones están aumentando debido al incremento de las actividades pesqueras en la región, y la sustentabilidad de las poblaciones de tiburones en Patagonia es motivo de creciente preocupación. Palabras clave: tiburones, capturas, redes de arrastre, pesquerías costeras, Patagonia.

scholarly journals Quaternary Marine Mollusk Associations of the Last Interglacials in North Patagonia (Argentina): Paleoecology and Paleoclimates

2021 ◽  
Author(s):  
M.P. Charó
Keyword(s):  
Habitat Heterogeneity ◽  
Buenos Aires ◽  
Global Changes ◽  
Buenos Aires Province ◽  
The North ◽  
Rio Negro ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Crassostrea Rhizophorae ◽  
Mis 5E

Deposits of different Quaternary marine transgressions are largely exposed in the Argentine north Patagonian littoral (39°15′S–41°02′S), south of the Buenos Aires and north of Río Negro provinces. The malacological associations of 84 sites were studied. Among them, 31 belong to Pleistocene deposits of the interglacials ≥ MIS 9, MIS 7, MIS 5e, 29 to Holocene deposits of the interglacial MIS 1, and 24 sites of modern beaches. These sites yielded 7385 fossils among valves and shells, of 78 species (42 bivalves and 36 gastropods), including 11 micromolluskan species. The record of the bivalves Crassostrea rhizophorae in the south of the Buenos Aires Province, and Anomalocardia brasiliana (both currently inhabiting lower latitudes), and very likely the gastropod Tegula atra (inhabiting today the Pacific Ocean) in the north of Río Negro Province, suggests that interglacials MIS 7, MIS 5e and MIS 1 were warmer than today. However, the associations determined for the studied interglacials have not changed in their composition, but in abundance of species, except for the latitudinal shifts of the three mentioned species, and the presence of cold to temperate water taxa since the MIS 1 in the ecotonal area of the north of Río Negro Province. Changes in the associations of northern Patagonia during the Quaternary derived from global changes (sea surface temperature, salinity, etc.), and the existence of habitat heterogeneity in each of the areas, that enabled the co-existence of different bivalve and gastropod species of the local benthic marine malacofauna.

scholarly journals Nutritional Characterization of Medicago sativa (Alfalfa) for Feeding to Ruminants

2021 ◽  
Author(s):  
F. Almeida López ◽  
P. Toalombo Vargas ◽  
S. Jiménez Yánez ◽  
M. Chávez Haro
Keyword(s):  
Medicago Sativa ◽  
Crude Protein ◽  
Central Zone ◽  
Neutral Detergent Fiber ◽  
Acid Detergent Fiber ◽  
Nitrogen Free Extract ◽  
Palabras Clave ◽  
Nutritional Characteristics ◽  
Region Data

This study aimed to analyze the nutritional characteristics of Medicago sativa (Alfalfa) hay for the feeding of ruminants in the central zone of the Sierra Region. The study was conducted in the Laboratory of the Faculty of Pecaurias Sciences of the Higher Polytechnic School of Chimborazo. Cutting was carried out for 60 days in different areas of the central Sierra region. Data were analyzed using descriptive statistics. Results of the bromatological analysis showed that the average total humidity was 11.12 ± 0.20% in (Rp-00542) while the minimum was 7.79 ± 0.05% in (Rp-00224). Values for dry matter ranged between 91.25 ± 0.03% (Rp336) and 88.53 ± 0.09% (Rp492); dry base ash ranged between 12.51 ± 0.08% (Rp500) and 9.16 ± 0.08% (Rp521); dry organic matter ranged between 90.84 ± 0.13% (Rp521) and 87.49 ± 0.08% (Rp521); and dry crude protein ranged between 22.44 ± 0.26% (Rp492) and 18.73 ± 0.08% (Rp336). The following values were also obtained: 1.94 ± 0.93% dry ethereal extract; 32.06 ± 2.11% dry nitrogen free extract; 46.96 ± 3.78% dry neutral detergent fiber; 40.67 ± 3.36% dry acid detergent fiber; and 8.23 ± 0.64% dry lignin detergent acid. Therefore, it can be determined that forage mixture provides all of the nutrients to the species of zootechnical interest. Keywords: Medicago sativa, alfalfa, sierra centro, rumiants. RESUMEN En el Laboratorio de la Facultad de Ciencias Pecaurias de la Escuela Superior Politécnica de Chimborazo, se realizó la Caracterización Nutricional de henos de Medicago sativa (Alfalfa) para la alimentación de Rumiantes en la zona centro de la Región Sierra; Mediante estadística descriptiva se obtuvo los siguientes resultados del análisis bromatológico a los 60 días de corte en las diferentes zonas de la región Sierra - Centro, se puede observar que el mayor promedio de la humedad total fue 11,12 ± 0,20% en (Rp-00542) mientras que el menos fue 7,79 ± 0,05% en (Rp-00224); para Materia Seca-Total los valores se obtuvieron entre  91,25 ± 0,03% (Rp336) y 88,53 ± 0,09% (Rp492); Cenizas base seca 12,51 ± 0,08% (Rp500) y 9,16 ± 0,08% (Rp521); el mayor valor para % Materia Orgánica Base seca fue de 90,84 ± 0,13% (Rp521) y el menor con 87,49 ± 0,08% (Rp521); para % Proteína cruda base seca la mejor respuesta fue 22,44 ± 0,26 (Rp492) % y el menor  18,73 ± 0,08 (Rp336), Fibra cruda base seca; 1,94 ± 0,93% Extracto etéreo base seca; 32,06 ± 2,11% Extracto Libre de Nitrógeno base seca; 46,96 ± 3,78% Fibra Detergente Neutro base seca; 40,67 ± 3,36% Fibra Detergente Acida base seca; 8,23 ± 0,64% Lignina Detergente Acida base seca. Por lo que se puede determinar que la mezcla forrajera aporta todos los nutrientes a todas las especies de interés zootécnico. Palabras clave: Medicago sativa, alfalfa, sierra centro, rumiantes.

scholarly journals Análisis del subsector museos y su contribución económica en México

UVserva ◽  
2020 ◽  
pp. 20-34
Author(s):  
Azminda Meybelli Román Nieto
Keyword(s):  
North American ◽  
Classification System ◽  
Growth And Development ◽  
National Account ◽  
Economy Growth ◽  
The North ◽  
Palabras Clave ◽  
Account System

El presente artículo analiza el papel de los museos en el sector de la cultura en México y su contribución económica. Para ello, se tomó como base para el análisis de los años 2016 y 2017, los resultados del Sistema Nacional de Cuentas del INEGI, (Año base 2013) y la clasificación del Sistema de Clasificación Industrial de América del Norte SCIAN (2018).Palabras clave: Sector; economía; crecimiento; cultura; museos. AbstractThis article presents the role of museums in the culture sector in Mexico and how they contribute to the growth and development of the country. For this, the results of the National Account System of INEGI, (Base Year 2013) and the classification of the North American Industrial Classification System SCIAN (2018) are taken as the basis for the analysis.Keywords: Sector; Economy; Growth; Culture; Museums.

ECOLOGICAL CHANGE AND HEALTH SECURITY IN NORTH CENTRAL REGION OF NIGERIA

2020 ◽  
pp. 15-21
Keyword(s):  
Central Zone ◽  
Ecological Change ◽  
Security Issue ◽  
Health Security ◽  
North Central ◽  
Social Challenges ◽  
Security Issues ◽  
The North ◽  
The People ◽  
Health Related

The change in our ecosystem today has creates a lot social challenges. Climate change which is one of the major causes of ecological change is attributed to both the nature and human causes. The issue has resulted in many soft security issues such as health related security issue, food security issue and socio-economic issue. This study examines how ecological change has affected health security of the people in the study area. The study use a sample of three states in the North central zone of Nigeria. The study uses an observation of 385 and the data collected were analyses using Kendell tau test of concordance. The study has found that ecological changes have significant effect on health security in the study area. The study notes that ecological change increase vulnerability to diseases such as malaria, typhoid and zoonosis. These happening thus creates health related issues in the affected areas. On the basis of the finding, it is recommended people in the affect areas should need to be health cautious by treating their drinking water and using anti-mosquitos nets and to equally avoid contact with unfamiliar animals. Keywords: Ecological change, health security and test of concordance

scholarly journals The Distal and Local Volcanic Ash in the Late Pleistocene Sediments of the Termination I Interval at the Reykjanes Ridge, North Atlantic, Based on the Study of the Core AMK-340

Geosciences ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 379
Author(s):  
Matul ◽  
Gablina ◽  
Khusid ◽  
Libina ◽  
Mikhailova
Keyword(s):  
North Atlantic ◽  
Volcanic Ash ◽  
Late Quaternary ◽  
Central Zone ◽  
Younger Dryas ◽  
Quaternary Sediments ◽  
Reykjanes Ridge ◽  
Volcanic Material ◽  
The North ◽  
Russian Research

We made the geochemical analysis of the volcanic material from the sediment core AMK-340 (the Russian research vessel “Akademik Mstislav Keldysh” station 340), the central zone of the Reykjanes Ridge. Two ash-bearing sediment units within the interval of the Termination I can be detected. They correlate with the Ash Zone I in the North Atlantic Late Quaternary sediments having an age of 12,170–12,840 years within the Younger Dryas cold chronozone and 13,600–14,540 years within the Bølling–Allerød warm chronozone. The ash of the Younger Dryas unit is presented mostly by the mafic and persilicic material originated from the Icelandic volcanoes. One sediment sample from this unit contained Vedde Ash material. The ash of the Bølling–Allerød unit is presented mostly by the mafic shards which are related to the basalts of the rift zone on the Reykjanes Ridge, having presumably local origin. Possible detection of Vedde Ash could help to specify the timing of the previously reconstructed paleoceanographic changes for the Termination I in the point of the study: significant warming in the area might have occurred as early as 300 years before the end of the conventional Younger Dryas cold chronozone.

Shark fisheries in Argentina

1998 ◽  
Vol 49 (7) ◽  
pp. 601 ◽  
Author(s):  
Gustavo E. Chiaramonte
Keyword(s):  
Fishing Effort ◽  
Population Trends ◽  
The South ◽  
Gill Nets ◽  
Argentine Sea ◽  
Commercial Importance ◽  
South West ◽  
Gill Net ◽  
Galeorhinus Galeus ◽  
Mustelus Schmitti

In the Argentine Sea there are about 35 species of sharks. Three species are subjected to directed fishing: the smoothhound Mustelus schmitti, the school shark Galeorhinus galeus and the copper shark Carcharhinus brachyurus. Other species of elasmobranchs with commercial importance are the angel shark Squatina spp. and several species of skates and rays. The rise in chondrichthyan declared landings registered from 1988 to 1996 is due to the increase in landings of smoothhound and rays. The most important directed shark fishery in the South-West Atlantic is the Necochea gill-net fishery for school shark, which is carried out by the coastal fleet; details are given of the ships and the gill-nets used in this area. The length frequencies of the catches by gill-nets are presented for the school shark; fishing effort (length (km) of net in the water per ship per day) and CPUE (number of sharks per fishing effort) were found not to be good indicators of population trends in the school shark fishery. Resumen. En el Mar Argentino se han registrado 35 especies de tiburones. Tres de estas especies están sometidas a una pesca dirigida; el gatuzo, Mustelus schmitti, el cazón, tiburón vitamínico o trompa de cristal, Galeorhinus galeus y la bacota, Carcharhinus brachyurus. Otras especies de elasmobranquios de importancia comercial son el pez ángel Squatina spp. y algunas especies de rayas. El incremento en los desembarcos de condríctios declarados a las autoridades pesqueras entre 1988 y 1996 es debido principalmente al incremento del desembarco de gatuzo y rayas. La pesquería dirigida a tiburón más importante en el Atlántico Sudoccidental es la pesquería costera de enmalle de Necochea para el cazón. Se describen el largo de las embarcaciones y las redes utilizadas en el área (la medida de malla, el calado y la operación del arte de pesca). Se presenta la frecuencia del largo total de las capturas de cazón en redes de enmalle. Se halló para la pesquería del cazón que el esfuerzo pesquero (estimado como km de red en el agua por embarcación por día) y la CPUE (estimada como tiburones/esfuerzo de pesca) no son buenos indicadores de la tendencia en la abundancia poblacional.

INFLUENCE OF ONLINE ADVERTISING IN THE PROMOTION OF NIGERIA PROFESSIONAL FOOTBALL LEAGUE (NPFL)

2020 ◽  
Vol 11 (1) ◽  
pp. 231-246
Author(s):  
Ifeanyi L. Anorue ◽  
Stanley U. Ugboaja ◽  
Chizoba P. Okonkwo
Keyword(s):  
Online Advertising ◽  
Research Work ◽  
Central Zone ◽  
Survey Method ◽  
Professional Football ◽  
Technological Determinism ◽  
The North ◽  
Huge Impact ◽  
Marketing Team ◽  
Web Designers

The advent of online advertising has drastically changed how football is approached and funded. No doubt, Information and Communication Technology has had huge impact on sports development across the globe and also has created new vista for sports promotion, marketing, sports followership and revenue generation. This study examines the influence of online advertising in the promotion of Nigeria Professional Football League (NPFL). The technological determinism theory was used as theoreti-cal basis for this research work. Survey method of research was adopted with four hundred copies of questionnaire administered to respondents in four States in the North- Central zone of Nigeria namely; Niger, Kogi, Benue and FCT. It was found that the extent of online advertising usage by the League Management Company (LMC) and NPFL club sides is poor in compare to its usage by other league organizers and club sides in advanced nations. Therefore, this study recommends that the league han-dlers should, immediately, consider setting up a fully equipped social media marketing team. This should include; web designers, graphic artists, online media influencers and advert executives. The LMC should also ensure the employment of professional web designers to revamp the look-and-feel of the site. Make it more user-friendly and updated constantly. Also, the website should be fully commercialized.

MARIA, MARIA: histórias de vida de mulheres no sertão do São Francisco (MG)

2020 ◽  
Vol 17 (29) ◽  
pp. 138-158
Author(s):  
CLÁUDIA MAIA ◽  
BÁRBARA FIGUEIREDO SOUTO
Keyword(s):  
Gender Relations ◽  
Life Histories ◽  
Minas Gerais ◽  
The North ◽  
Palabras Clave ◽  
The Feminine ◽  
History Of ◽  
Historia De Vida ◽  
Del Rio ◽  
Siglo Xx

O artigo objetiva problematizar modelos hegemônicos de feminilidade a partir da história de vida de duas mulheres que experienciaram o sertão às margens do rio São Francisco (MG), habitando o município homônimo ao rio. Busca ainda entender como elas representam a si mesmas e a outras mulheres; como foram construídas as relações de gênero e os sentidos que constituem o feminino no sertão norte-mineiro na primeira metade do século XX. Partimos da compreensão de que as relações de gênero não são estáticas e permanentes e que as representações acerca do feminino são históricas, ou seja, não é possível generalizar um modelo de feminilidade para todos os estratos sociais e para todos os contextos geo-históricos. Palavras-chave: Gênero. Mulheres. Sertão. MARIA, MARIA: life histories of women in the backwoods of the São Francisco (MG) Abstract: The article aims to problematize hegemonic models of femininity from the life history of two women who experienced the backwoods on the banks of the São Francisco river (MG), inhabiting the homonymous municipality to the river. Also, it seeks to understand how they represent themselves and other women; how the gender relations were built and the meanings that constitute the feminine in the north of Minas Gerais backwoods, in the first half of the twentieth century. We start from the understanding that gender relations are not static and permanent and that the representations about the feminine are historical, that is, it is not possible to generalize a model of femininity for all social strata and for all geohistorical contexts. Keywords: Gender. Women. Backwoods. MARIA, MARIA:historias de vida de mujeres en el interior de São Francisco (MG) Resumen: El artículo tiene como objetivo problematizar los modelos hegemónicos de feminidad a partir de la historia de vida de dos mujeres que vivieron en el interior a las orillas del río São Francisco (MG), que habitan en el municipio homónimo del río. También busca comprender cómo ellas representan a sí mismas y a otras mujeres; cómo se construyeronlas relaciones de género y los significados que constituyen el femenino en el norte de Minas Gerais en la primera mitad del siglo XX. Partimos de la comprensión de que las relaciones de género no son estáticas y permanentes y que las representaciones sobre el femenino son históricas, es decir, no es posible generalizar un modelo de feminidad para todos los estratos sociales y para todos los contextos geo-históricos. Palabras clave: Género. Mujeres. Interior.

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