Sounds produced by very crevalle jack,Caranx hippos, from the Maryland seaside

1960 ◽  
Vol 1 (2) ◽  
pp. 115-116
Author(s):  
Malcolm Taylor ◽  
Romeo J. Mansueti
Keyword(s):  
Crevalle Jack ◽  
Caranx Hippos

Helminth Parasites of Caranx hippos (Crevalle Jack) and Sardinella maderensis (Madeiran Sardinella) from Two Fishing Settlements In Okrika, Rivers State, Nigeria

2021 ◽  
Vol 42 (1) ◽  
pp. 75-80
Author(s):  
B. Odum ◽  
C.C. Amuzie
Keyword(s):  
Infected Fish ◽  
Economic Losses ◽  
Parasitic Infections ◽  
Helminth Parasites ◽  
High Quality Protein ◽  
Fish Samples ◽  
Crevalle Jack ◽  
Rivers State ◽  
Caranx Hippos ◽  
Anisakid Larvae

Fish is an important dietary component as a source of high quality protein, and parasitic infections can result in production and economic losses. Therefore, this study was aimed at investigating the helminth parasites of Caranx hippos and Sardinella maderensis of Okrika. Fish samples were purchased from fishers between May and June, 2019 from two locations: Angalabia and Sara landing ports, Okrika. Fifty specimens of each species were dissected using standard methods, and parasites were identified using appropriate keys. Parasite ecological parameters were computed. Two parasite species were identified, Lethacotyle sp. (monogenea) and Anisakid larvae (nematode). Twenty-six specimens of Caranx hippos were infected with Lethacotyle sp., and eight with Anisakid larvae. Only one specimen of S. maderensis was infected with Anisakid larvae; others were un-infected. Examination showed a prevalence of 52.0% and 16.0% infection of Lethacotyle sp. and Anisakid larvae, respectively, in Caranx hippos, and 2.0% prevalence of Anisakid larvae in Sardinella maderensis. The preferred organs for parasite infection were the gills (Lethacotyle sp.) and intestines (Anisakid larva) of infected fish. The recovery of Anisakid larvae at a prevalence of 16% indicates that anisakiasis could be an emerging disease in Okrika. It is recommended that further research be conducted into the molecular characterization of Lethacotyle sp. of C. hippos of Okrika. It is also important to properly identify and characterize the Anisakid species, and investigate the incidence of human anisakiasis inOkrika and other coastal cities of Rivers State, Nigeria. Keywords: Lethacotyle, Anisakid larva, anisakiasis, Caranx, Sardinella, Parasites, Marine, Okrika, Nigeria

Sounds Produced by Very Young Crevalle Jack, Caranx hippos, from the Maryland Seaside

1960 ◽  
Vol 1 (2) ◽  
pp. 115 ◽  
Author(s):  
Malcolm Taylor ◽  
Romeo J. Mansueti
Keyword(s):  
Crevalle Jack ◽  
Caranx Hippos

scholarly journals Metal-sensitive and thermostable trypsin from the crevalle jack (Caranx hippos) pyloric caeca: purification and characterization

BMC Chemistry ◽  
2013 ◽  
Vol 7 (1) ◽  
Author(s):  
Helane MS Costa ◽  
Augusto CV Freitas Júnior ◽  
Ian PG Amaral ◽  
Izaura Y Hirata ◽  
Patrícia MG Paiva ◽  
...  
Keyword(s):  
Purification And Characterization ◽  
Pyloric Caeca ◽  
Crevalle Jack ◽  
Caranx Hippos

scholarly journals Obtainment and characterization of digestive aspartic proteases from the fish Caranx hippos (Linnaeus, 1766)

2022 ◽  
Vol 82 ◽  
Author(s):  
J. A. F. Silva ◽  
M. K. S. Silva ◽  
T. A. Silva ◽  
L. D. A. Costa ◽  
M. L. E. Leal ◽  
...  
Keyword(s):  
Proteolytic Activity ◽  
Partial Purification ◽  
Salting Out ◽  
Aspartic Proteases ◽  
Total Inhibition ◽  
Crevalle Jack ◽  
Pepstatin A ◽  
Caranx Hippos ◽  
Do So

Abstract This work aimed to obtain aspartic proteases of industrial and biotechnological interest from the stomach of the crevalle jack fish (Caranx hippos). In order to do so, a crude extract (CE) of the stomach was obtained and subjected to a partial purification by salting-out, which resulted in the enzyme extract (EE) obtainment. EE proteases were characterized physicochemically and by means of zymogram. In addition, the effect of chemical agents on their activity was also assessed. By means of salting-out it was possible to obtain a purification of 1.6 times with a yield of 49.4%. Two acid proteases present in the EE were observed in zymogram. The optimum temperature and thermal stability for EE acidic proteases were 55 ºC and 45 °C, respectively. The optimum pH and pH stability found for these enzymes were pH 1.5 and 7.0, respectively. Total inhibition of EE acid proteolytic activity was observed in the presence of pepstatin A. dithiothreitol (DTT) and Ca2+ did not promote a significant effect on enzyme activity. In the presence of heavy metals, such as Al3+, Cd2+ and Hg2+, EE acidic proteases showed more than 70% of their enzymatic activity. The results show that it is possible to obtain, from the stomach of C. hippos, aspartic proteases with high proteolytic activity and characteristics that demonstrate potential for industrial and biotechnological applications.

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