Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: estuarine ecosystem

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Length and weight relationship and growth performance of Meretrix casta under experimental culture condition in three different estuarine environment

100%

Srilatha G., Manikandarajan T., Ramamoorthy K., Sundaravarman K., Sankar G., Anbarasu R.

International Letters of Natural Sciences

2015

tom 47

The Meretrix casta is an edible clam for human beings and it is widely distributed around the aquatic ecosystem. The clam has relatively thick shells that can attain a length of three inches. The knowledge of the biology, culture and biochemical composition of any edible organism is extremely important. Though the size, shape and colour of clam are different their nutritive value is very good. A maximum average length of 27.15mm was observed in the M.casta studied during 2011 and a maximum average length of 26.51mm was observed during 2012. The average lengths of M.casta in all the three different estuaries studied were as follows: 27.15 > 25.82 > 25.04 mm in 2011 and 26.51 > 25.88 > 25.17mm in 2012. A maximum average weight of 7.824 and 7.155g was observed during 2011 and in 2012; a maximum weight of 7.528g and minimum of 6.941g was recorded uniformly in all the three different estuaries. However, in 2011and 2012 a maximum and minimum of average length of 26.86, 25.10 mm, and average weight of 7.67 and 7.05g respectively were noticed in both Vellar and Uppanar estuaries of M.casta. the present investigation, it is clearly observed that M.casta can grow a weight of 0.13g/day and length of 0.122mm/day among the three different estuaries studied in the Cuddalore district which is located in Bay of Bengal.

Butyltins and phenyltins in biota and sediments from the Lagoon of Venice

100%

Bortoli A., Troncon A., Dariol S., Pellizzato F., Pavoni B.

Oceanologia

2003

tom 45

nr 1

Sediments and organisms were sampled to determine organotin contents – butyltins (BTs) and phenyltins (PhTs) – at 12 locations in an estuarine ecosystem, the Lagoon of Venice, characterised by varying contamination impacts. The results showed that organotin contamination in sediments is at lower levels, ranging from 2.5±0.1 to 84±1 ng g−1 (d.w.) for ΣBTs and from 0.8±0.2 to 7±1 ng g−1 (d.w.), for ΣPHTs, than in organisms, where the highest concentrations were found in filter feeders like mussels – from 60±3 to 7632±148 ng g−1 (d.w.) for ΣBTs and from 0.80±0.01 to 4005±121 ng g−1 (d.w.) for ΣPHTs. The possible risk to human health was assessed on the basis of the consumption of edible species sampled in some areas of the lagoon.

The system Tetrabothrius bassani (Tetrabothriidae)- Morus bassanus (Sulidae) as a bioindicator of marine heavy metal pollution

80%

Mendes P., Eira C., Vingada J., Miquel J., Torres J.

Acta Parasitologica

2013

tom 58

nr 1

Helminths are known to accumulate higher amounts of certain elements than their hosts. The present study assesses the accumulation of heavy metals in Tetrabothrius bassani and in its host, the Atlantic gannet (Morus bassanus) found dead due to bycatch along the seashore in the centre of Portugal. Samples of kidney, liver and pectoral muscle of 23 infected gannets, as well as specimens of T. bassani were analysed for As, Cd, Cr, Cu, Hg, Mn, Pb, Se and Zn by ICP-MS. The evidenced lower concentrations of Cr and Pb in tissues of gannets in comparison to an earlier study performed in the same area may reveal a change in the diet of M. bassanus between both study periods. The highest bioaccumulation factor was obtained for Cd with a 12.7-times higher concentration in the cestode than in gannet muscle. Lead concentration in T. bassani was 6.9-times higher than in kidney tissue, 8.5-times higher than in muscle and 9.5-times higher than in liver of M. bassanus. The cestode/seabird system T. bassani/M. bassanus can be considered a promising bioindicator system to monitor environmental Cd and Pb pollution in marine ecosystems.

Ograniczanie wyników

1 Acta Parasitologica

1 International Letters of Natural Sciences

1 Oceanologia

1 Anbarasu R.

1 Bortoli A.

1 Dariol S.

1 Eira C.

1 Manikandarajan T.

1 Mendes P.

1 Miquel J.

1 Pavoni B.

1 Pellizzato F.

1 Ramamoorthy K.

1 Sankar G.

1 Srilatha G.

1 Sundaravarman K.

1 Torres J.

1 Troncon A.

1 Vingada J.

1 2015

1 2013

1 2003

Wyniki wyszukiwania

Length and weight relationship and growth performance of Meretrix casta under experimental culture condition in three different estuarine environment

Butyltins and phenyltins in biota and sediments from the Lagoon of Venice

The system Tetrabothrius bassani (Tetrabothriidae)- Morus bassanus (Sulidae) as a bioindicator of marine heavy metal pollution