Title | Diets, Physiology, Biochemistry and Digestive Tract Development of Freshwater Fish Larvae |
Publication Type | Book Chapter |
Year of Publication | 2008 |
Authors | Portella, MC, Dabrowski, K |
Editor | Cyrino, JEP, Bureau, DP, Kapoor, BG |
Book Title | Feeding and Digestive Functions in Fishes |
Pagination | 227 - 279 |
Publisher | Science Publishers |
City | Enfield, New Hampshire, US |
Abstract | Live preys’ availability to larval fish is determined on the basis of suitable size, frequently described as gape width/prey size proportion (Dabrowski and Bardeg, 1984). In some cases, larval freshwater fish, like the 4-5 mm total length yellow perch (Kolkovski and Dabrowski, 1998), eat prey smaller than 50-100 μm in width, whereas in the case of the first feeding larval walking catfish (Clarias), the largest size of Artemia nauplii offered, 205-295 μm (4% of fish body length), increased the growth, but compromised survival in comparison to ungraded size nauplii. Nauplii graded into two categories – below 59 μm and 59-183 μm, mesh size net – even when fed in excess, resulted in much lower fish size and survival was 14-28% in comparison to 67% in fish fed with unsieved Artemia (Petkam and Moodie, 2001). Therefore, it is important to readjust the feed particle size (live or inert) to the optimum acceptable size of larval fish. |
URL | http://www.crcnetbase.com/doi/10.1201/b10749-7 |
Notice of Publication Number | NOP 08-A22 (English) |