Biological effects of the anti-parasitic chemotherapeutant emamectin benzoate on a non-target crustacean, the spot prawn (Pandalus platyceros Brandt, 1851) under laboratory conditions

Biochemical composition of body segments and physiological condition of the spot prawn (Pandalus platyceros) were determined during 84 d of starvation and 21 d of subsequent feeding. Maximum molting frequency, 1.79%∙d−1, occurred from day 22 to 43 and mortalities peaked at 0.81%∙d−1 on resumption of feeding. Ratios of wet weight of hepatopancreas to abdomen or whole body decreased on starvation and increased on feeding, and so provided an index of physiological condition. Uptake of moisture and chlorides with loss of other halides in prawn tissue resulted from starvation. Resting oxygen consumption rate declined by 50% after 40 d of starvation. Lipid in the hepatopancreas increased during early inanition to become the major energy source. Lipid contributed 73.1%, protein 20.6%, and carbohydrate 6.3% of total metabolized reserves. Hepatopancreas, carcass, and abdominal muscle generated 49.1, 33.4, and 17.5% of energy utilized. On subsequent feeding, lipid, carbohydrate, and protein accounted for 73.8, 20.1, and 6.1% of total caloric uptake with energy assimilation by body sections similar to depletion values. Spot prawn have sufficient reserves to remain in good commercial condition for 40 d without food.

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Toxicity and Some Biological Effects of Emamectin Benzoate, Novaluron and Diflubenzuron against Cotton Leafworm

Alexandria Science Exchange Journal An International Quarterly Journal of Science Agricultural Environments ◽

10.21608/asejaiqjsae.2015.2944 ◽

2015 ◽

Vol 36 (OCTOBER- DECEMBER) ◽

pp. 350-357

Keyword(s):

Biological Effects ◽

Emamectin Benzoate ◽

Cotton Leafworm

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Tag Retention of the Spot Prawn, Pandalus platyceros, Injected With Coded Wire Tags

Journal of the Fisheries Research Board of Canada ◽

10.1139/f77-289 ◽

1977 ◽

Vol 34 (11) ◽

pp. 2196-2199 ◽

Cited By ~ 14

Author(s):

Earl F. Prentice ◽

John E. Rensel

Keyword(s):

Key Words ◽

Carapace Length ◽

Needle Insertion ◽

Behavioral Changes ◽

Control Group ◽

Growth And Survival ◽

Tag Retention ◽

Pandalus Platyceros ◽

Spot Prawn ◽

Coded Wire Tags

Juvenile spot prawns, Pandalus platyceros (initial carapace length 15.0–22.5 mm), were successfully tagged with Bergman–Jefferts coded wire tags in the thoracic sinus. Tagged prawns, prawns subject to tagging needle insertion but without tags, and a control group were tested. No significant differences in growth and survival within or between test groups occurred and no behavioral changes were observed among tagged animals. All tagged prawns molted at least twice during the 6-mo experiment. Average tag retention was 95%. Key words: Pandalus platyceros, tagging, tag retention, molting, survival

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Concentrations of Inorganic Elements and Fatty Acids in Geographic Populations of the Spot Prawn Pandalus platyceros

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f91-050 ◽

1991 ◽

Vol 48 (3) ◽

pp. 382-390 ◽

Cited By ~ 7

Author(s):

J. N. C. Whyte ◽

J. A. Boutillier

Keyword(s):

Fatty Acids ◽

Body Parts ◽

Inorganic Elements ◽

Metallic Elements ◽

Ambient Seawater ◽

Body Segments ◽

Geographic Populations ◽

Males And Females ◽

Pandalus Platyceros ◽

Spot Prawn

Inorganic elements and fatty acids were quantified in body segments of different size classes of the spot prawn Pandalus platyceros collected from various locations in British Columbia. Substantial differences in concentration of elements occurred in different body segments of the spot prawn, with the exoskeleton accumulating the highest number of quantifiable elements. Comparison of elements in abdomen carapace and tissue from immature males, mature males, and females indicated no correlation between element concentration and size, age, or sex of the spot prawn. Fatty acid profiles were similar for all body parts, except the hepatopancreas, and of the major fatty acids, only the content of 18:1n9 increased significantly with age of the spot prawn. Fatty acids and elements in the abdomen tissue of spot prawns from different locations were not significantly different and indicated similarity of diet irrespective of location. The concentrations of elements absorbed into the carapace of female spot prawns from separate geographic locations were substantially different, suggesting incorporation from elements in the ambient seawater, rather than uptake from diet, or any genetic variability associated with element metabolism in the spot prawn. The levels obtained for metallic elements in the spot prawn provide a measure against which future environmental impact could be assessed.

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