Deadweight anchoring behavior for aquaculture longline

ABSTRACT The similarity theory was used to study the behavior of five anchoring and one “rezon” type deadweight designs, using scale models. The surface sediments extracted from Charagato Bay, Cubagua Island, were characterized to evaluate the efficiency of these models on these...

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Autores principales:	Trujillo,Ernesto, León,Luis, Martínez,Guillermo
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2020
Materias:	deadweight anchors longline scale models theory of similarity aquaculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000400686
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spelling	oai:scielo:S0718-560X20200004006862020-09-23Deadweight anchoring behavior for aquaculture longlineTrujillo,ErnestoLeón,LuisMartínez,Guillermo deadweight anchors longline scale models theory of similarity aquaculture ABSTRACT The similarity theory was used to study the behavior of five anchoring and one “rezon” type deadweight designs, using scale models. The surface sediments extracted from Charagato Bay, Cubagua Island, were characterized to evaluate the efficiency of these models on these substrates. A test structure consisting of a tank with a mixture of sediment and seawater, and a metal trestle was used. Tension variables were considered, using a 6 mm PE end section. Weights were added at one of its ends which represented the longline system's resistance force and at the other the model's force in the eyebolt (Tc) representing the gripping force due to the interaction of the anchoring design with the substrate, and the static rupture tension (Tr) upon the weight (Pm) of each model, against different anchoring attack angles (θ), aspect ratios (AR) 1/2.5; 1/3.0; 1/3.5, and 1/4.0; sail attack angles (β) of 0, 10, and 20°, and the efficiency index (EI) of each model. The Kruskal-Wallis contrast was used to detect the possible differences against different anchoring attack angles, and, to locate the differences between them; box and mustache graphs were used. The most effective model on very fine sand-type sediment was the pyramidal with the claw-like frame, followed by the pyramidal with the shovel-like frame and the “rezon” type traditionally used on Margarita Island.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.48 n.4 20202020-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000400686en10.3856/vol48-issue4-fulltext-2327
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	deadweight anchors longline scale models theory of similarity aquaculture
spellingShingle	deadweight anchors longline scale models theory of similarity aquaculture Trujillo,Ernesto León,Luis Martínez,Guillermo Deadweight anchoring behavior for aquaculture longline
description	ABSTRACT The similarity theory was used to study the behavior of five anchoring and one “rezon” type deadweight designs, using scale models. The surface sediments extracted from Charagato Bay, Cubagua Island, were characterized to evaluate the efficiency of these models on these substrates. A test structure consisting of a tank with a mixture of sediment and seawater, and a metal trestle was used. Tension variables were considered, using a 6 mm PE end section. Weights were added at one of its ends which represented the longline system's resistance force and at the other the model's force in the eyebolt (Tc) representing the gripping force due to the interaction of the anchoring design with the substrate, and the static rupture tension (Tr) upon the weight (Pm) of each model, against different anchoring attack angles (θ), aspect ratios (AR) 1/2.5; 1/3.0; 1/3.5, and 1/4.0; sail attack angles (β) of 0, 10, and 20°, and the efficiency index (EI) of each model. The Kruskal-Wallis contrast was used to detect the possible differences against different anchoring attack angles, and, to locate the differences between them; box and mustache graphs were used. The most effective model on very fine sand-type sediment was the pyramidal with the claw-like frame, followed by the pyramidal with the shovel-like frame and the “rezon” type traditionally used on Margarita Island.
author	Trujillo,Ernesto León,Luis Martínez,Guillermo
author_facet	Trujillo,Ernesto León,Luis Martínez,Guillermo
author_sort	Trujillo,Ernesto
title	Deadweight anchoring behavior for aquaculture longline
title_short	Deadweight anchoring behavior for aquaculture longline
title_full	Deadweight anchoring behavior for aquaculture longline
title_fullStr	Deadweight anchoring behavior for aquaculture longline
title_full_unstemmed	Deadweight anchoring behavior for aquaculture longline
title_sort	deadweight anchoring behavior for aquaculture longline
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2020
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2020000400686
work_keys_str_mv	AT trujilloernesto deadweightanchoringbehaviorforaquaculturelongline AT leonluis deadweightanchoringbehaviorforaquaculturelongline AT martinezguillermo deadweightanchoringbehaviorforaquaculturelongline
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Deadweight anchoring behavior for aquaculture longline

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