scholarly journals Estimating diet composition in sea lions: Which technique to choose?

2006 ◽  
Author(s):  
D. Tollit ◽  
S. Heaslip ◽  
B. Deagle ◽  
S. Iverson ◽  
R. Joy ◽  
...  
Keyword(s):  
Diet Composition ◽  
Sea Lions

scholarly journals Estimating diet composition from scat analysis in otariid seals (Otariidae): is it reliable?

1988 ◽  
Vol 66 (8) ◽  
pp. 1865-1870 ◽  
Author(s):  
T. Dellinger ◽  
F. Trillmich
Keyword(s):  
Diet Composition ◽  
Clupea Harengus ◽  
Fish Length ◽  
South American ◽  
California Sea Lions ◽  
Scat Analysis ◽  
Sprattus Sprattus ◽  
Sea Lions ◽  
Fur Seals ◽  
Partial Digestion

Analysis of teleost sagittal otoliths contained in scats has been widely used to determine the diet of seals. This method is based on the assumption that relative frequencies of otoliths in scats faithfully reflect those offish in the diet. This assumption has rarely been tested experimentally. We compared the ratios of herring (Clupea harengus) to sprat (Sprattus sprattus) otoliths in faeces (output) of captive California sea lions (Zalophus californianus) and South American fur seals (Arctocephalus australis) with the ratios at feeding (input). Sea lions and fur seals showed no consistent differences in recovery rates and partial digestion of otoliths. Output ratios deviated only slightly from input ratios, the smaller sprat otoliths being underrepresented in the output by 8%. Only about 40% of the otoliths fed to the seals were found in the scats. For both species partial digestion of otoliths led to a 16% underestimation of fish length and a 35% underestimation of fish mass.

Diet composition and prey selection of vendace Coregonus albula in the mesotrophic, temperate Lake Ostrowite (Northern Poland)

2008 ◽  
Vol 37 (1) ◽  
Author(s):  
Tomasz Kakareko ◽  
Paweł Napiórkowski ◽  
Jacek Kozłowski
Keyword(s):  
Diet Composition ◽  
Prey Selection ◽  
Temperate Lake ◽  
Coregonus Albula ◽  
Northern Poland ◽  
Mesotrophic Lake ◽  
Selection Of

Diet composition and prey selection of vendaceLake Ostrowite is a mesotrophic lake in Northern Poland 280.7 ha in area and 43 m deep at its deepest point. To study vendace (

Diet composition and feeding ecology of Nibea albiflora in Xiangshan Bay, east China Sea

2013 ◽  
Vol 20 (6) ◽  
pp. 1284-1292
Author(s):  
Nan LIN ◽  
Yazhou JIANG ◽  
Xingwei YUAN ◽  
Jing GUO ◽  
Jianzhong LING ◽  
...  
Keyword(s):  
East China Sea ◽  
Feeding Ecology ◽  
Diet Composition ◽  
East China ◽  
China Sea ◽  
Xiangshan Bay ◽  
Nibea Albiflora

Diet composition of round sardinella (Sardinella aurita) and flat sardinella (Sardinella maderensis) in the south of Atlantic Moroccan coast

2020 ◽  
Vol 24 (7) ◽  
pp. 73-91
Author(s):  
Ayoub Baali ◽  
Khalil Chahdi Ouazzani ◽  
Feirouz Touhami ◽  
Ahmed El-Achi ◽  
Khadija Amenzoui
Keyword(s):  
Diet Composition ◽  
The South ◽  
Moroccan Coast ◽  
Sardinella Aurita
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