Monitoring and Assessment of Oyster and Barnacle Larvae Settlement in an Oyster Farm in Western Taiwan

Abstract

The Portuguese oyster (Crassostrea angulata) is an important fishery resource in Taiwan. This study investigated oyster cultures at two locations along the coast of Taisi Township from March 2012 to July 2014. The average recruitment density, measured once every two weeks, of the oyster larvae was 256.4 ± 236.6 individuals/shell (N = 62) at site A and 118.5 ± 140.2 individuals/shell (N = 39) at site B. The average adherence density of the barnacle larvae was 187.1 ± 251.2 individuals/shell (N = 60) at site A and 60.9 ± 112.5 individuals/shell (N = 37) at site B. In Taiwan, C. angulata spawned all year. The primary spawning season was from March to September. The primary of adherence spawning season of barnacles was from March to October. Rainfall was the major factor that influenced oyster C. angulata and barnacle settlement, the eigenvalue of PC1 was 1.83 and could explain 61.0%. There are two main culturing seasons that move oyster larvae from coast of Taisi to farms in other places: from March to May and from August to September. Although the oyster larvae are more abundant in spring, fishermen prefer harvesting the larvae in autumn to avoid the typhoon season (July-September).

Implicación Del Transporte Marítimo en La Contaminación De Los Mares. Desde El Atlántico Oeste Hasta El Puerto De Gijón

“…Cuando se le molesta físicamente, la especie expulsa agua, lo que explica que se le llame chorro de mar. Es un invertebrado muy eurotérmico; capaz de tolerar cambios en el agua de mar entre 10° y -30°C y salinidades entre 22 y 34% (16). La Styela plicata rivaliza con otros organismos, echándolos del espacio que ocupa.…”

Educación, Tecnología E Inclusión – Articulación De Escenarios Para Una Sociedad Mejor Preparada Frente a Los Riesgos De Las Tic

“…De esta manera, se fortalecen los lazos de unidad y nos dará las herramientas para divulgar con orgullo lo que fue nuestro pasado, lo que somos en la actualidad y los objetivos o metas a alcanzar en el futuro como entes dinámicos que vivimos, es cierto, en un mundo globalizado e interconectado, pero a su vez nos mantenemos en la línea de ser parte activa en el desarrollo y promoción de lo que nos caracteriza como mexiquenses en lo particular y mexicanos en lo general. 4,188,189,190,191,192,193,194,195,196,197 Ambientes 21,22,23,24,25,26,27,41,43,54,73,134,162,167 Aprendizaje 1,2,3,4,6,7,9,11,14,16,17,20,21,22,23,24,25,26,27,28,29,30,32,33,34,35,36,37,38...…”

“…Formación docente 172,179,180,185,186 Formación inicial docente 13,14,16,179,180,183,184,187 Formación recibida 162,164,165,168…”

Sand Grain Size and Organic Matter Concentration in the Intertidal Zones on the Southwest Coast of Taiwan

“…The southern side of the area is far from the sand dumping area. The sampling site TS-B was established outside the west seawall, which is located near the west side of Xinxing District [11] (Figure 1 and Figure 2). On the suggestion of Dr. Jaw-Guei Lin from National Taiwan Ocean University, two glass bottles were hung on the bamboo poles of an oyster rack at the two sampling areas.…”