Proximate composition, lipid utilization and validation of a non-lethal method to determine lipid content in migrating American shad Alosa sapidissima

2018 ◽  
Vol 92 (6) ◽  
pp. 1832-1848 ◽  
Author(s):  
S. M. Bayse ◽  
A. M. Regish ◽  
S. D. McCormick
Keyword(s):  
Lipid Content ◽  
Proximate Composition ◽  
American Shad ◽  
Alosa Sapidissima ◽  
Lipid Utilization

Lipid content and fatty acid composition in female American shad, Alosa sapidissima , at different stages of ovarian development under reared conditions

2018 ◽  
Vol 50 (2) ◽  
pp. 439-448
Author(s):  
Xiao‐Qiang Gao ◽  
Fan Fei ◽  
Zhi‐Feng Liu ◽  
Chang‐Tao Guan ◽  
Bin Huang ◽  
...  
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Lipid Content ◽  
Ovarian Development ◽  
American Shad ◽  
Alosa Sapidissima

scholarly journals How lipid content and temperature affect American shad (Alosa sapidissima) attempt rate and sprint swimming: implications for overcoming migration barriers

2019 ◽  
Vol 76 (12) ◽  
pp. 2235-2244
Author(s):  
Shannon M. Bayse ◽  
Stephen D. McCormick ◽  
Theodore Castro-Santos
Keyword(s):  
Lipid Content ◽  
Swimming Performance ◽  
Fork Length ◽  
American Shad ◽  
Seasonal Effects ◽  
Upstream Migration ◽  
Alosa Sapidissima ◽  
Migration Barriers ◽  
Sprint Swimming ◽  
Swimming Endurance

How seasonal effects such as temperature increases and reduced lipid content affect the ability of anadromous fishes to traverse high-velocity barriers and sprint swimming is poorly understood. We evaluated American shad (Alosa sapidissima) swimming performance in a flume against high flow velocities (2.5–3.7 m·s−1) during the upstream migration period (April–May; temperatures 11.1–21.4 °C) to determine how their willingness to enter a velocity barrier (attempt rate) and their swimming endurance changed during migration. American shad did not make attempts at low temperatures, and attempt rate gradually increased throughout the migration as temperatures warmed. American shad displayed two distinct, nonsustained swimming modes (prolonged and sprint swimming), and endurance was different between sexes. At warmer temperatures, females swam at prolonged speeds more often and longer females displayed a lower endurance. Males primarily swam at sprint speeds and were affected by swimming speed, fork length, and lipid content. Our results indicate that American shad motivation and swimming endurance change over the course of the migration as conditions change, potentially limiting their ability to pass barriers.

Proximate composition of male and female African catfish (Clarias gariepinus) and tilapia (Tilapia zilli) in Jega river, Kebbi state, Nigeria

2020 ◽  
Vol 01 (02) ◽  
pp. 28-35
Author(s):  
W. M. Namaga ◽  
B. Yahaya ◽  
M. A. Salam
Keyword(s):  
Protein Content ◽  
Fish Species ◽  
Lipid Content ◽  
Proximate Composition ◽  
Clarias Gariepinus ◽  
Fibre Content ◽  
African Catfish ◽  
Male And Female ◽  
Juvenile Female ◽  
Significant Difference

Fish is highly nutritious, tasty, and easily digestible. It is much sought after by a broad cross-section of the world’s population, particularly in developing countries as it provides the cheapest protein source. Nigeria is blessed with numerous inland freshwater rivers and lakes scattered all over the country. This freshwater habitat consists of many species of fish that have successfully dominated all niches over time and have for many reasons remained unstudied. The situation concealed a lot of scientific information particularly on food security and safety to the inmates and the country at large. Jega River which transcended many States in the North-Western part of Nigeria to open into the river Niger is one of such rivers largely uncared for, study-wise. African catfish (Clarias gariepinus) and Tilapia (Tilapia zillii) have been wisely selected for the present proximate composition studies. The juveniles of these fishes were purchased from local fishermen in Mariner Waje landing site of the river which flows by Jega town, a local government area in Kebbi State, Nigeria. For the study, the methodology approved by the Association of Official Analytical Chemists (AOAC) was used to determine the proximate composition of the fishes. The highest percentage crude protein content of 49.18 ± 0.30% was observed in juvenile female C. gariepinus; while the lowest protein content of 39.22± 0.50% was observed in juvenile male T. zilli. The highest percentage lipid content of 11.75± 1.50% was observed in juvenile female tilapia; while the lowest percentage lipid content of 6.25± 0.29% was observed in male African catfish. The highest percentage fibre content of 4.00 ± 0.29% was observed in male and female C. gariepinus, while the lowest percentage fibre content of 0.75± 0.29% was observed in male tilapia. There were variations (p< 0.05) when the protein and lipid contents of both the species were compared with each other. There was also a significant difference (p< 0.05) when the carbohydrate contents were compared between the fish species, but there was no significant difference (p > 0.05) when the fibre content was compared within the species. The analyses showed that both the male and female fish species studied had high protein contents.

scholarly journals Evasive responses of American shad (Alosa sapidissima) to ultrasonic stimuli

2003 ◽  
Vol 4 (2) ◽  
pp. 25-30 ◽  
Author(s):  
Dennis T. T. Plachta ◽  
Arthur N. Popper
Keyword(s):  
American Shad ◽  
Alosa Sapidissima

scholarly journals Effects of frozen storage on the proximate composition and formaldehyde content in some selected fish from three different sources of southern Bangladesh

2021 ◽  
Vol 32 (2) ◽  
pp. 303-312
Author(s):  
MD. BOKTHIER RAHMAN ◽  
MD. SAZEDUL HOQUE ◽  
SUPRAKASH CHAKMA ◽  
SHAIDA AKTER ◽  
S.M. OASIQUL AZAD ◽  
...  
Keyword(s):  
Marine Fish ◽  
Lipid Content ◽  
Proximate Composition ◽  
Frozen Storage ◽  
Ash Content ◽  
Health Concern ◽  
Formaldehyde Content ◽  
Fish Samples ◽  
Fresh Frozen ◽  
Different Sources

The study was conducted in aims to investigate the effects of frozen storage and cooking conditionson proximate compositions and formaldehyde content (FA) in some selected fish from three different sourcesin Bangladesh. Proximate composition in fresh and final frozen samples was determined by standard AOACmethod and FA content in fresh, frozen stored, and cooked samples was determined by spectrophotometricmethod. Among the studied fishes, marine fish contained higher protein (except Rita), lipid, and ash followedby estuarine and culture fish samples. Protein, moisture and ash content decreased and lipid content increasedsignificantly (p<0.05) during frozen storage for all samples and sources. The FA was lower in cultured fishsamples compared to that of the river and marine fish samples, both at fresh and end of frozen storage. Atfresh condition, FA content in all samples ranged from 0.41 to 0.71µg/g, 0.51 to 0.89µg/g, and 0.73 to1.69µg/g which increased to 0.95 to 2.11µg/g, 1.74 to 1.95µg/g, and 3.22 to 5.20µg/g at end of the storageperiod, respectively (p<0.05). Further, FA content significantly decreased after cooking in all the fishsamples (p<0.05). However, irrespective of fish species and sources, the FA content was higher than WHOrecommended value (0.2 µg/g). The study findings revealed that longer frozen storage of fish could be apublic health concern to the consumers.

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