scholarly journals Spawning and early nursery areas of anchoveta Engraulis ringens Jenyns, 1842 in fjords of southern Chile

2008 ◽  
Vol 43 (2) ◽  
Author(s):  
Claudia A Bustos ◽  
Mauricio F Landaeta ◽  
Fernando Balbontín
Keyword(s):  
Southern Chile ◽  
Nursery Areas ◽  
Engraulis Ringens

scholarly journals Evaluating marine reserves as a management policy in the central-southern anchovy (Engraulis ringens) fishery of Chile

2021 ◽  
Vol 49 (2) ◽  
pp. 212-226
Author(s):  
Juan Pablo Díaz Vega ◽  
Yarela Flores Arévalo
Keyword(s):  
Marine Reserves ◽  
Marine Reserve ◽  
Fishing Effort ◽  
Management Policy ◽  
Decision Variable ◽  
Southern Chile ◽  
Artisanal Fishing ◽  
Fishing Activity ◽  
Engraulis Ringens ◽  
The Impact

The anchovy (Engraulis ringens) fishery in central-southern Chile, like many fisheries worldwide, is overexploitation mainly due to poor and short-term management by fishing authorities and communities. This study proposes and evaluates marine reserves as a possible tool to apply since there is a current marine reserve law in Chile. The study's methodology is the simulation of a bioeconomic model that includes two areas: one is the protected, and the other is the artisanal fishing, in which the protected area transfers biomass to the artisanal fishing area. The reserve is incorporated as a decision variable in the management of this resource. It is determined as a percentage of protection of the total fish population related to fishing effort, which quantifies and evaluates the impact of protecting a stock of parental fish on the fishery's sustainability. Biomass data used is from 2000-2006, during which the anchovy fishery was fully exploited. The carrying capacity and intrinsic growth rate are estimated, and biomass is projected at different protection and effort levels. Results show that if a marine reserve with a protection level of 30% had been applied as a management policy in the anchovy fishery of central-southern Chile in the early 2000s, the fishing activity would be in a state of full exploitation rather than overexploitation as it is today. This model's fundamental contribution is that it makes possible fishery evaluation with real data from the same fishing activity.

scholarly journals Three-dimensional structure and avoidance behaviour of anchovy and common sardine schools in central southern Chile

2004 ◽  
Vol 61 (7) ◽  
pp. 1120-1126 ◽  
Author(s):  
F. Gerlotto ◽  
J. Castillo ◽  
A. Saavedra ◽  
M.A. Barbieri ◽  
M. Espejo ◽  
...  
Keyword(s):  
Internal Structure ◽  
Coastal Area ◽  
Small Schools ◽  
Three Dimensional ◽  
Avoidance Behaviour ◽  
Dimensional Structure ◽  
Acoustic Survey ◽  
Southern Chile ◽  
Engraulis Ringens ◽  
High Concentrations

Abstract We studied the avoidance behaviour and three-dimensional (3-D) structure of anchovy (Engraulis ringens) and common sardine (Strangomera bentincki) schools mixed in high concentrations in a coastal area of central southern Chile. Observations were carried out during an acoustic survey in January 2002 by means of a vertical echosounder and a multi-beam sonar. The sonar harvested around 900 series of 3-D school images, and 3000 2-D school images were collected with the echosounder. The results showed that all fish aggregations presented the same internal structure, but different global morphologies, from single small schools (with length three times the height) on the edges of the distribution to large dense layers (length more than seven times the height) in its centre. Observation of avoidance in the vertical and horizontal planes indicated that limited vertical diving occurred close to the ship (fish dive from the surface to the 5–10-m depth layer below the vessel), while no horizontal avoidance was observed.

Spawning, daily egg production, and spawning stock biomass estimation for common sardine (Strangomera bentincki) and anchovy (Engraulis ringens) off central southern Chile in 2002

2007 ◽  
Vol 86 (2-3) ◽  
pp. 228-240 ◽  
Author(s):  
Luis A. Cubillos ◽  
Patricia Ruiz ◽  
Gabriel Claramunt ◽  
Santiago Gacitúa ◽  
Sergio Núñez ◽  
...  
Keyword(s):  
Egg Production ◽  
Biomass Estimation ◽  
Southern Chile ◽  
Stock Biomass ◽  
Spawning Stock ◽  
Engraulis Ringens

Malformations in the embryonic development of Engraulis ringens (Clupeiformes) in a spawning area off central–southern Chile: description and rates

2013 ◽  
Vol 93 (8) ◽  
pp. 2225-2234 ◽  
Author(s):  
Alejandra Llanos-Rivera ◽  
Paulina Vásquez ◽  
Leonardo R. Castro
Keyword(s):  
Egg Size ◽  
Developmental Stages ◽  
Average Rate ◽  
Southern Chile ◽  
Endogenous Factors ◽  
A Value ◽  
Spawning Area ◽  
Natural Temperature ◽  
Engraulis Ringens ◽  
The Relationship

Variations in the rate of embryonic malformations of the anchoveta Engraulis ringens in a spawning area off central–southern Chile were assessed. Eggs in stages of development subsequent to blastodisc formation were collected and preserved. Several severe malformations were identified and grouped by: (1) proliferation of disorganized tissue in early and late developmental stages; (2) irregular blastopore closure; and (3) notochordal deformation, of which the second had the highest incidence among the embryos. The average rate of malformation was 5.64%, a value close to that reported for other Clupeiformes and below the rate of 10%, indicating the influence of purely endogenous factors. The expected relationship between temperature variations and malformation rates was not observed, probably because the natural temperature range experienced by the embryos was above that at which severe malformation had previously been observed in the laboratory. The relationship between egg size and malformation rates over the spawning season was not determined; however, a relationship between egg size and malformation rates was detected among the samples from each sampling date, which suggests that malformations may be attributable to endogenous factors rather than to environmental factors acting directly on the eggs in the plankton.

Copepod community response to variable upwelling conditions off central-southern Chile during 2002-2004 and 2010-2012

2014 ◽  
Vol 515 ◽  
pp. 83-95 ◽  
Author(s):  
P Pino-Pinuer ◽  
R Escribano ◽  
P Hidalgo ◽  
R Riquelme-Bugueño ◽  
W Schneider
Keyword(s):  
Community Response ◽  
Southern Chile ◽  
Copepod Community

Food waste and dynamic complex systems: The case of Peru and a solution model proposal Part 1: Peruvian Anchoveta (Engraulis ringens)

2020 ◽  
Author(s):  
Carlos A Almenara
Keyword(s):  
United Nations ◽  
Complex Systems ◽  
Revenue Management ◽  
Food Waste ◽  
Intelligent Systems ◽  
Solution Model ◽  
Food And Agriculture ◽  
Food And Agriculture Organization ◽  
Engraulis Ringens ◽  
The United Nations

[THE MANUSCRIPT IS A DRAFT] According to the Food and Agriculture Organization of the United Nations (FAO, 2020), food waste and losses comprises nearly 1.3 billion tonnes every year, which equates to around US$ 990 billion worldwide. Ironically, over 820 million people do not have enough food to eat (FAO, 2020). This gap production-consumption puts in evidence the need to reformulate certain practices such as the controversial monocropping (i.e., growing a single crop on the same land on a yearly basis), as well as to improve others such as revenue management through intelligent systems. In this first part of a series of articles, the focus is on the Peruvian anchoveta fish (Engraulis ringens).

Late Paleozoic foraminifera from southern Chile

10.3133/pp858 ◽  
1976 ◽  
Author(s):  
Raymond Charles Douglass ◽  
Merlynd Keith Nestell
Keyword(s):  
Late Paleozoic ◽  
Southern Chile

On a new Temnocephala (Platyhelminthes) from Southern Patagonia (Chile, Argentina), with a redescription of T. chilensis and some systematic and biogeographical insights

Zootaxa ◽  
2020 ◽  
Vol 4852 (3) ◽  
pp. 383-395
Author(s):  
RODRIGO PONCE DE LEÓN ◽  
ERICH H. RUDOLPH ◽  
ODILE VOLONTERIO
Keyword(s):  
New Species ◽  
Geographic Distribution ◽  
Southern Chile ◽  
Host Preferences ◽  
Southern Patagonia ◽  
Diagnostic Key ◽  
A New Species

To date, only one species of Temnocephala is known from Chile, Temnocephala chilensis, and three from southern Argentina (Patagonia), namely T. chilensis, Temnocephala dionii, and Temnocephala mexicana. Here we describe a new species of Temnocephala and provide an updated description of T. chilensis based on material found on an anomuran crab (Aeglidae) from southern Chile. Additional hosts and localities are reported for both species in southern Argentina and Chile, and a diagnostic key for all species of Temnocephala hosted on Aegla and Parastacidae is included as well. In southern Chile, both T. chilensis and the new species were found on the crayfish Samastacus spinifrons and on the anomuran crabs Aegla abtao and Aegla alacalufi; in addition, the new species was found on Aegla manni, and T. chilensis on Aegla rostrata. In southern Argentina, T. chilensis and the new species were found on Aegla riolimayana and S. spinifrons. Based on their shared traits (morphology of the penial stylet, host preferences and geographic distribution), the temnocephalans hosted in Aegla are tentatively gathered into two clusters, the Chilensis and Axenos groups. 

scholarly journals A large calving event of Ventisquero San Rafael, southern Chile

1992 ◽  
Vol 38 (128) ◽  
pp. 208-209 ◽  
Author(s):  
Stephan Harrison
Keyword(s):  
Southern Chile ◽  
San Rafael
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