Biochemical factors involved in the resistance of some smoked tropical fish samples to insect attack

Akinola John AKINTOLA; Oluwatoyin LAWAL

Makale detayları

Biochemical factors involved in the resistance of some smoked tropical fish samples to insect attack

Yazarlar:

Akinola John AKINTOLA | Oluwatoyin LAWAL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2011 Vol.35 Issue 1, pp.89-93

Belge Tipi:

Makale

Yayın Tarihi:

12/2010

Belge Dili:

Türkçe

Document ID (Org No.):

2000812971

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Anahtar kelimeler:

Özet:

 

The role of mineral elements (ppm), protein and oil content (%), and saponification and free fatty acid values in contributing to resistance against insect infestation was investigated in 4 fish species: Clarias gariepinus, Parachuma obscura, Hydrocynus sp., and Malapterus electricus. Smoked fish samples were purchased from a local market in Ilorin, Kwara State, Nigeria, packaged, and maintained at 4 °C for 7 days. They were later brought out to acclimatise, and then observed for 4 months for possible natural insect infestation. Next, crushed samples of each species were analysed using conventional chemical analysis in order to assess the role of some elements and biochemical compounds in inducing resistance. The results showed that insect infestation did not occur after the period of storage (4 months) and chemical analysis showed that 3 samples lacked lead (Pb), a heavy metal not required in trace amounts, but contained other heavy metals required in trace amounts, such as Fe, Mn, Co, and Cu. Protein content in the 4 samples was average (50%), but oil content was low. Hydrocynus sp. and Malapterus electricus had an acid value below 50 mg KOH/g. Additionally, all the samples had high a saponification value (above 500 mL/g). The presence of iron (>=1.5), high protein (%) and saponification values, low oil content, and low acid values of between 35 and 90 were the elements and biochemical constituents that prolonged the shelf life of the fish species studied.

 

The role of mineral elements (ppm), protein and oil content (%), and saponification and free fatty acid values in contributing to resistance against insect infestation was investigated in 4 fish species: Clarias gariepinus, Parachuma obscura, Hydrocynus sp., and Malapterus electricus. Smoked fish samples were purchased from a local market in Ilorin, Kwara State, Nigeria, packaged, and maintained at 4 °C for 7 days. They were later brought out to acclimatise, and then observed for 4 months for possible natural insect infestation. Next, crushed samples of each species were analysed using conventional chemical analysis in order to assess the role of some elements and biochemical compounds in inducing resistance. The results showed that insect infestation did not occur after the period of storage (4 months) and chemical analysis showed that 3 samples lacked lead (Pb), a heavy metal not required in trace amounts, but contained other heavy metals required in trace amounts, such as Fe, Mn, Co, and Cu. Protein content in the 4 samples was average (50%), but oil content was low. Hydrocynus sp. and Malapterus electricus had an acid value below 50 mg KOH/g. Additionally, all the samples had high a saponification value (above 500 mL/g). The presence of iron (>=1.5), high protein (%) and saponification values, low oil content, and low acid values of between 35 and 90 were the elements and biochemical constituents that prolonged the shelf life of the fish species studied.

Makale detayları

Biochemical factors involved in the resistance of some smoked tropical fish samples to insect attack

Yazarlar:

Akinola John AKINTOLA | Oluwatoyin LAWAL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2011 Vol.35 Issue 1, pp.89-93

Belge Tipi:

Makale

Yayın Tarihi:

12/2010

Belge Dili:

Türkçe

Document ID (Org No.):

2000812971

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Key words: Acid value

fish

infestation

mineral content

resistance

shelf life

Sayı

Makale detayları

Biochemical factors involved in the resistance of some smoked tropical fish samples to insect attack

Yazarlar: Akinola John AKINTOLA | Oluwatoyin LAWAL

Yayıncı: TUBITAK

Dergi: Turkish Journal of Biology 2011 Vol.35 Issue 1, pp.89-93

Belge Tipi: Makale

Yayın Tarihi: 12/2010

Belge Dili: Türkçe

Document ID (Org No.): 2000812971

Sıklık: İki Aylık

eISSN: 1303-6092

pISSN: 1300-0152

Key words: Acid value

fish

infestation

mineral content

resistance

shelf life

Sayı

Yazarlar:

Akinola John AKINTOLA | Oluwatoyin LAWAL

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2011 Vol.35 Issue 1, pp.89-93

Belge Tipi:

Makale

Yayın Tarihi:

12/2010

Belge Dili:

Türkçe

Document ID (Org No.):

2000812971

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152