Digestion and Feeding of the White Sturgeon, Acipenser Transmontanus PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Digestion and Feeding of the White Sturgeon, Acipenser Transmontanus PDF full book. Access full book title Digestion and Feeding of the White Sturgeon, Acipenser Transmontanus by Randal Buddington. Download full books in PDF and EPUB format.
Author: Randal Buddington
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 312
Get Book Here
Book Description
Author: Randal Buddington
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 312
Get Book Here
Book Description
Author: Joan Carole Lindberg
Publisher:
ISBN:
Category :
Languages : en
Pages : 148
Get Book Here
Book Description
Author: Michael James Miller
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 150
Get Book Here
Book Description
Author: Wing-Keong Ng
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
Get Book Here
Book Description
Author: Ruping Xu
Publisher:
ISBN:
Category :
Languages : en
Pages : 300
Get Book Here
Book Description
Author: Mark A. Herold
Publisher:
ISBN:
Category :
Languages : en
Pages : 440
Get Book Here
Book Description
Author: J E P Cyrino
Publisher: CRC Press
ISBN: 1439842698
Category : Science
Languages : en
Pages : 589
Get Book Here
Book Description
Understanding the biology of the innumerable number of aquatic species on our planet is the focus of sustained research efforts. Environmental degradation, management or rehabilitation of wild stocks, and the forecasted climatic changes are fueling interest in the study of the ecology, feeding behavior, and nutrition of aquatic animals in their nat
Author: Sergei I. Doroshov
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 172
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 1046
Get Book Here
Book Description
Author: Keith R. Garner
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 126
Get Book Here
Book Description
"White sturgeon (Acipenser transmontanus) are native to the upper Columbia River. Population demographics during the past 30 years have documented a shift to larger, older fish which indicates little or no recruitment of juveniles into the aging adult population. Predation is one possible explanation for the lack in recruitment of age-0 white sturgeon. Laboratory experiments revealed that several species (walleye, northern pikeminnow, channel catfish, prickly sculpin, burbot) will prey on young-of-the-year (age-0) white sturgeon; but there are few reports that document predation of juvenile white sturgeon in the wild. I conducted four experiments to determine why more white sturgeon are not seen in predator diets: 1) How vulnerable are juvenile white sturgeon to predation? 2) Are white sturgeon digested faster than other fish? 3) How long do white sturgeon remains persist in the gut of predators? 4) What parts of a white sturgeon are most easily distinguishable in the gut of a predator. To answer my first question, I examined the vulnerability of juvenile white sturgeon to predation by walleye and burbot (Lota Iota), two of the most abundant predators in Lake Roosevelt. I placed age-0 white sturgeon (TL = 24 ± 4 mm), yearling (age-1) white sturgeon (TL = 173 ± 24 mm), rainbow trout and kokanee together in tanks with walleye and in other tanks with burbot. Walleye ate the following percentages of prey: 65% rainbow trout, 75% kokanee, and 100% age-0 white sturgeon in study one, and 55% kokanee, 55% rainbow trout, 0% age-1 white sturgeon, and in 35% no fish for study two. Burbot ate the following percentages of prey: 100% kokanee, 100% rainbow trout, and 100% age-0 white sturgeon in study one, and 100% kokanee, 92% rainbow trout, and 0% age-1 white sturgeon in study two. The results of this laboratory study supported the hypothesis that predation may limit recruitment of age-0 white sturgeon, but field validation is needed to confirm it. To answer the second question, I tested the hypothesis that the cartilaginous endoskeleton of the white sturgeon may be digested quicker than bony fish endoskeletons resulting in few predation observations. To test this hypothesis, white sturgeon and kokanee (Oncorhynchus nerka) of comparable size were force fed to walleye (Sander vitreus) and the rate at which the prey was evacuated from the gut was measured at 12 ± 1 °C and 19 ± 1°C for three and eight hours. Wet and dry weights were taken and compared using t-tests. After eight hours, walleye held at 12.0 ± 1 °C and 19.0 ± 1°C evacuated white sturgeon (wet weight) at a rate 3.0 times faster than the kokanee at 12°C (t = 14.02, P
