Three New Records of Gammarid Amphipod in Songkhla Lake, Thailand

Rattanama, Kotchakorn; Pattaratumrong, Manasawan Saengsakda; Towatana, Prawit

doi:10.21315/tlsr2016.27.3.8

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…Amphipods are one of the natural food that can be developed. Amphipods are benthic fauna that inhabit marine, fresh and brackish environments which are a central part of the mangrove ecosystem [9]. Amphipods have several advantages, including being able to tolerate various environmental parameters, reproduce quickly, and have a short life cycle which makes it possible to be developed as natural food in hatcheries and grow-out aquaculture [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Amphipods (Grandierella megnae) Density on the Growth and Survival Rate of Mangrove Crab (Scylla tranquebarica)

Hasnidar

Tamsil

2023

AJFAR

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This study aims to determine the effect of amphipod density on the growth, survival and molting of mangrove crabs (Scylla tranquebarica).The research was conducted in the Installation of Tiger Shrimp Hatchery (ITSH), located Lawallu Village, Soppeng Riaja District, Barru Regency, South Sulawesi, from May to June 2022. There was 45 mangrove crabs, with an average weight of 0.04 ± 0.005 g and a carapace width of 5.4 ± 0.1 mm which were obtained from local hatcheries. The maintenance container is a glass jar containing 0.5 liters of water, each jar is filled with one crablet. The treatments tested were differences in amphipods density, namely: A) 20 ind/0.5 L, B) 30 ind/0.5 L, C) 40 ind/0.5 L, feeding frequency is once a day for first 10 days and twice a day at 8:00 AM and 5:00 PM for next 20 days. Parameters observed were growth weight (GW) and growth carapace width (GC), specific growth rate-weight (SGR-W) and specific growth carapace- width (SGR-C), survival rate (SR) and number of molting (NM). Using a completely randomized design with three treatments and three replications, each replication consisted of 5 crabs. Data were analyzed for variance and Duncan's further test, physical and chemical parameters of water were analyzed descriptively. The results showed that amphipod density had an effect on GW, GC, SGR-W and SGR-C, but had no effect on SR and NM. Amphipod densities of 20 - 40 ind/0.5 L produced good survival and a large number of molting, but amphipod densities of 30 ind/0.5 L were more efficient for the growth of mangrove crabs.

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Section: Introductionmentioning

confidence: 99%

Effect of Amphipods (Grandierella megnae) Density on the Growth and Survival Rate of Mangrove Crab (Scylla tranquebarica)

Hasnidar

Tamsil

2023

AJFAR

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“…Amphipods are a benthic fauna that lives in both marine and freshwater environments and plays a signi cant part in the ecology (Rattanama et al, 2016). Additionally, it has a su cient amount of protein and fatty acids, with a focus on healthful fatty acids such as DHA and EPA (Baeza-Rojano et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Amphipod-Crustacea: a potential live feed for mud crab culture

Sulaeman,

Herleniah,

Gunarto

et al. 2023

Preprint

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Mud crab (Genus: Scylla) is among the most popular seafood in the world. Cannibalism is a major bottleneck in the development of commercial aquaculture of Scylla paramamossain. Artificial feed is generally less attractive for the crablet stage and believed that more appropriate live feed will be preferred. Two sets of experiments were conducted to evaluate if Amphipod-crustacea may be used as live prey for mud crabs. The first experiment was to test the consumption rate of four days old crablet against amphipods. The experiment was conducted in glass containers with a 1 L capacity at varying density levels of Amphipod. The quantity of Amphipod consumed by a crablet over ten hours was evaluated. The second experiment was to test the ability of different sizes of mud crabs on amphipod prey. The results indicated that the consumption rate increases considerably (P < 0.05) when the density of amphipods rises and peaks at 30.3 ind./crab. However, mud crabs' preying ability on amphipods was significantly reduced as their size increased. At about 24 g body weight, crab juveniles could consume 50% of the provided amphipod during exposure. It may be then inferred that the amphipod is applicable as a live food during the weaning of mud crabs. This is the first study of successful feeding mud crab juveniles on alive amphipods and suggests that amphipods can be developed as the primary feed during weaning. However, research about amphipods' influence on the mud crab's growth rate is still needed.

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“…The impurity in SLB originated from urbanization, industrialization, and artisanal fishing since along the shore are urban settlements, fishing villages, shrimp ponds, seasonally flooded forests, and rice paddy fields. Biological studies of the SLB have concentrated primarily on the taxonomy and biology of a few economically important species [ 23 , 24 , 25 ]. The presence of chlorophyll a ( Chl-a ) content has been suggested as a reason for phytoplankton propagation, including cyanobacteria in water bodies [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand

Naknaen

Ratsameepakai

Suttinun

et al. 2021

Toxins

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The Songkhla Lake Basin (SLB) located in Southern Thailand, has been increasingly polluted by urban and industrial wastewater, while the lake water has been intensively used. Here, we aimed to investigate cyanobacteria and cyanotoxins in the SLB. Ten cyanobacteria isolates were identified as Microcystis genus based on16S rDNA analysis. All isolates harbored microcystin genes, while five of them carried saxitoxin genes. On day 15 of culturing, the specific growth rate and Chl-a content were 0.2–0.3 per day and 4 µg/mL. The total extracellular polymeric substances (EPS) content was 0.37–0.49 µg/mL. The concentration of soluble EPS (sEPS) was 2 times higher than that of bound EPS (bEPS). The protein proportion in both sEPS and bEPS was higher than the carbohydrate proportion. The average of intracellular microcystins (IMCs) was 0.47 pg/cell on day 15 of culturing, while extracellular microcystins (EMCs) were undetectable. The IMCs were dramatically produced at the exponential phase, followed by EMCs release at the late exponential phase. On day 30, the total microcystins (MCs) production reached 2.67 pg/cell. Based on liquid chromatograph-quadrupole time-of-flight mass spectrometry, three new MCs variants were proposed. This study is the first report of both decarbamoylsaxitoxin (dcSTX) and new MCs congeners synthesized by Microcystis.

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Three New Records of Gammarid Amphipod in Songkhla Lake, Thailand

Cited by 8 publications

References 4 publications

Effect of Amphipods (Grandierella megnae) Density on the Growth and Survival Rate of Mangrove Crab (Scylla tranquebarica)

Effect of Amphipods (Grandierella megnae) Density on the Growth and Survival Rate of Mangrove Crab (Scylla tranquebarica)

Amphipod-Crustacea: a potential live feed for mud crab culture

Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand

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