Role of glass eel salinity preference in the control of habitat selection and growth plasticity in Anguilla anguilla

Édeline, Éric; Dufour, Sylvie; Élie, Pierre

doi:10.3354/meps304191

Cited by 85 publications

(98 citation statements)

References 43 publications

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“…According to Wilson et al (2007), glass eels will migrate from spawning area at the sea to the estuary to reach the elver stadia and grow in freshwater habitat until they reach the yellow eel stage. Edeline et al (2005) also stated that glass eel can survive at acute salinities during migration from seawater into freshwater, yet glass eel will adapt to changes in salinity in the estuary area before reaching freshwater. Salinity treatment of 20 g/L and 30 g/L put the eel seeds in hyperosmotic conditions which esulted in higher decrease in weight than that in 10 g/L salinity.…”

Section: Discussionmentioning

confidence: 99%

“…Sutrisno (2008) suggested that salinity of 5 mg/L was the best salinity for eel seed Anguilla bicolor with survival rate of 100% and specific growth rate of 2.33%. Edeline et al (2005) said that compared to freshwater, salinity of 34 g/L and temperature of 18 ºC resulted in the highest growth of glass eel A. anguilla. Lamson et al (2009) stated that eel A. rostrata increased 2.2 times of length and 5.3 times of weight at salinity >28 g/L compared to freshwater.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of salinity range for rearing glass eel Anguilla bicolor bicolor

Lukas

Djokosetiyanto

Budiardi

et al. 2017

Jurnal Akuakultur Indonesia

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Fasting is one of a method that used for measured growth of fish in a shorter period of time. This study was aimed to determine the optimum range of salinity for improve the survival and growth of glass eel Anguilla bicolor bicolor. It used a completely randomized design (CRD) with four salinity treatments and three replications, namely (A) 0 g/L, (B) 10 g/L, (C) 20 g/L, and (D) 30 g/L. The fish used were of glass eel A. bicolor bicolor with 0.15-0.23 g of weight. The experiment was conducted in an aquarium of 60×30×30 cm 3 with a volume of 30 Liters and at a stocking density of 2 g/L for 14 days. During the maintenance, glass eels were fasted for have a significantly of biomass decline. Data collection was done at the start and the end of maintenance. Parameters measured included survival (%) and the rate of decline in absolute biomass (g). Physical and chemical parameters included temperature, dissolved oxygen, and pH which were measured daily, while ammonia and alkalinity were measured every seven days. Result showed that survival was not significantly different between treatments (P>0.05), while the rate of decline in absolute biomass was significantly different between treatments (P<0.05). Treatments of 0 g/L salinity was the lowest survival than the others. While treatment of 10 g/L salinity was the lowest rate of decline in absolute biomass. According to research, the optimum salinity was 10 g/L, and after analysis with quadratic regression analysis, the optimum range of salinity were 5.00-13.40 g/L.Keywords: optimum salinity, survival, growth, glass eel, Anguilla bicolor bicolor ABSTRAKPemuasaan merupakan salah satu metode pengukuran perubahan bobot ikan yang dipelihara dalam waktu singkat. Penelitian ini bertujuan untuk menentukan kisaran salinitas optimum untuk meningkatkan kelangsungan hidup dan pertumbuhan glass eel Anguilla bicolor bicolor. Rancangan penelitian yang digunakan adalah rancangan acak lengkap (RAL), dengan empat perlakuan salinitas dan tiga ulangan, yaitu (A) 0 g/L, (B) 10 g/L, (C) 20 g/L, dan (D) 30 g/L. Penelitian dilakukan selama 14 hari. Ikan yang digunakan adalah glass eel A. bicolor bicolor dengan bobot 0,15-0,23 g dengan padat tebar 2 g/L. Pemeliharaan dilakukan di akuarium berukuran 60×30×30 cm 3 dengan volume air 30 Liter/akuarium. Selama pemeliharaan glass eel dipuasakan sehingga diperoleh penurunan biomassa yang signifikan. Pengambilan sampel data dilakukan setiap tujuh hari berupa kelangsungan hidup (%) dan laju penurunan biomassa mutlak (g). Parameter fisika kimia air berupa ammonia dan alkalinitas dilakukan setiap tujuh hari, sedangkan suhu, oksigen terlarut (DO), dan pH dilakukan setiap hari. Hasil penelitian menunjukkan bahwa kelangsungan hidup tidak berbeda nyata antar perlakuan (P>0,05) sedangkan laju penurunan biomassa mutlak berbeda nyata antar perlakuan (P<0,05). Berdasarkan hasil penelitian, salinitas 10 g/L, 20 g/L, dan 30 g/L menunjukkan kelangsungan hidup 100%, sedangkan salinitas 0 g/L memberikan kelangsungan hidup terendah. Salinitas 10 g/L menunjukkan...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of salinity range for rearing glass eel Anguilla bicolor bicolor

Lukas

Djokosetiyanto

Budiardi

et al. 2017

Jurnal Akuakultur Indonesia

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“…As individuals of a given species saturate this optimal habitat, overcrowding reduces habitat quality. Over-crowding in eels increases cannibalistic behaviour (Moriarty 1987;Edeline et al 2005) and density-dependent mortality (Vollestad and Jonsson 1988), promoting the movement of individuals to less suitable habitats. Higher aquatic productivity in temperate latitudes induces higher growth rates and higher incidences of cannibalism in estuaries and saltwater than freshwater habitats (Edeline et al 2005).…”

Section: Ideal Free Distributionmentioning

confidence: 99%

“…As body size increases in fishes, swimming ability increases and the relative cost of swimming decreases (Ware 1982;Helfman et al 1997). The ability of eels to colonize freshwater habitats has been associated with high locomotor activity (Edeline et al 2005). Higher energetic status would enable American eel at the extremes of its range to undertake inland migrations and gain fitness by inhabiting low-density river habitats (see also Edeline 2007) or by reaching habitats with optimal suitability.…”

Section: Conditional Essmentioning

confidence: 99%

A synthesis of the ecological processes influencing variation in life history and movement patterns of American eel: towards a global assessment

Vélez‐Espino

Koops

2009

Rev Fish Biol Fisheries

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American eel, Anguilla rostrata, is a catadromous fish that spawns in the Sargasso Sea and migrates to coastal waters and freshwater systems ranging from Greenland down the Atlantic coast to South America and has been regarded as comprising a panmictic population. American eel is in decline across much of its range. Research and management is primarily conducted at local to regional scales, yielding inconsistent research results and management recommendations that may be inhibited by large-scale processes. We review the research on American eel ecology demonstrating that its variable life history and movement patterns can be explained based on: (1) latitudinal productivity gradients; (2) ideal free habitat selection; (3) conditional evolutionarily stable life history strategies; (4) size at arrival to the coast (correlated with distance from the spawning grounds); and, (5) temperature variance and annual degree-day effects on somatic growth. Using these ecological processes, we outline how local and largescale effects on American eel dynamics can be integrated in a panmictic (or quasi-panmictic) modelling framework to enable defensible predictions of population responses to anthropogenic and oceanic phenomena. Due to its widespread distribution and existing knowledge gaps, the conservation and management of American eel will require international cooperation.

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“…Esta elección de agua dulce o salina por parte de las angulas está también influenciada por su grado de actividad locomotora y la condición corporal cuando llegan a nuestras costas (Edeline et al 2005(Edeline et al , 2006. En el presente estudio no fue evaluado la actividad locomotora de los ejemplares capturados, pero tanto su longitud como su peso son similares a los descritos por otros autores en angulas de ecosistemas mediterráneos (Iglesias et al 2010).…”

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