Experimental use of cobble substrates in concrete raceways for improving fin condition of cutthroat (Oncorhynchus clarki) and rainbow trout (O. mykiss)

Bosakowski, Thomas; Wagner, Eric J.

doi:10.1016/0044-8486(94)00223-b

Cited by 51 publications

(40 citation statements)

References 7 publications

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“…Reared fry of cutthroat trout (Oncorhynchus clarki) in concrete raceways suff ers with erosions of pectoral, dorsal and caudal fi ns. With rainbow trout reared in same conditions was observed a worsened condition of right pectoral fi ns, both abdominal fi ns, dorsal, caudal and anal fi ns (Bosakowski and Wagner, 1995). Rainbow trout reared in recirculation systems have smaller size of pectoral and dorsal fi ns compare to fi sh reared in fl ow through systems.…”

Section: Rearing Systemmentioning

confidence: 81%

“…On the contrary, smaller subordinate fi sh intake less feed, they are growing slowly and reduce the risk of confl ict with dominant individuals and fi n damage (Maclean et al, 2000). The dorsal fi n becomes damaged most frequently in salmonids (Bosakowski and Wagner, 1995;Maclean et al, 2000). Flood et al (2012) observed by camera that the most attacks of big rainbow trout individuals were heading towards caudal fi n area of smaller individuals.…”

Section: Aggressive Behaviourmentioning

confidence: 99%

“…Non-damaged fi ns are evaluated by grade 0, minor disturbance of fi n tissue are evaluated as grade 1, large disruptions of fi n areevaluated as grade 2. Subsequently, each fi sh marks of each fi n are added up and result is a total evaluation of individual's fi ns (Bosakowski and Wagner, 1995). Moutou et al (1998) evaluated fi n condition according to missing tissue.…”

Section: Methods Of Fin Condition Evaluationmentioning

confidence: 99%

“…Fin erosion occurs only in the intensively reared fi sh (Bosakowski and Wagner, 1994;Ellis et al, 2008). Worsened fi n condition infl uences swimming abilities and surviving of reared fi sh in natural conditions (Bosakowski and Wagner, 1995). Fin erosions are caused by abrasion against tank surface and by physical contact with other fi sh, especially when feeding (Person-Le Ruyet et al, 2007;Turnbull et al, 2008;Adams et al, 2011), by inapropriate diet composition, feeding management, (Latremouille, 2003;Noble et al, 2008), thoughtless manipulation (Svobodová et al, 2007) and bacterial infections (Ellis et al, 2002;Latremouille, 2003).…”

Section: Causes Of Fin Damagesmentioning

confidence: 99%

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Fin condition of fish kept in aquacultural systems

Klíma¹,

Kopp²,

Hadašová³

et al. 2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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Section: Rearing Systemmentioning

confidence: 81%

Section: Aggressive Behaviourmentioning

confidence: 99%

Section: Methods Of Fin Condition Evaluationmentioning

confidence: 99%

Section: Causes Of Fin Damagesmentioning

confidence: 99%

See 2 more Smart Citations

Fin condition of fish kept in aquacultural systems

Klíma¹,

Kopp²,

Hadašová³

et al. 2013

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…The pool liner at the Kensington River hatchery possibly provided a less abrasive surface, which may have reduced pectoral fin degeneration in these fish. Compared to concrete raceways, cobble substrate provides a less abrasive surface, and has been used successfully to reduce fin erosion in salmonids (Bosakowski and Wagner, 1995;Wagner et al, 1996). Rearing density does not appear to be a factor contributing to fin degeneration since rearing densities were relatively low (2.8 -18.8 kg m À 3 ) compared to studies that have found no effect of rearing density on fin erosion (Soderberg and Krise, 1987;Soderberg and Meade, 1987).…”

Section: Discussionmentioning

confidence: 89%

Fin development in stream- and hatchery-reared Atlantic salmon

Pelis¹,

McCormick²

2003

Aquaculture

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To determine the effect of development and environment on fin growth, we measured fin lengths of juvenile Atlantic salmon (Salmo salar) from two hatcheries (August, October and April -May), stream-reared fish (July and October) stocked as fry into two tributaries, and smolts from the main stem of the Connecticut River (May). For stream-reared parr, there was a linear relationship between the dorsal, caudal and anal fins with fork length, while the pectoral, pelvic and adipose fins exhibited a curvilinear relationship with fork length. Parr from a high gradient stream had larger caudal fins than fish from a low gradient stream, but other fins did not differ. Regression lines for the fins of stream-reared smolts were all linear when fin length was regressed against fork length. Stream-reared parr had larger pectoral, pelvic and anal fins than smolts of similar size while dorsal and caudal fin lengths did not differ. Regression equations formulated using the fins of stream-reared parr were used to calculate the percent difference (100 Â observed fin length/expected) in fin lengths between stream-and hatchery-reared parr. The pelvic, adipose, caudal and anal fins of hatchery-reared parr showed no signs of degeneration by the first sampling period 7 months after hatching, whereas degeneration in the pectoral (13 -20%) and dorsal (15 -18%) fins was evident at this time. By the end of the study, degeneration was present in every fin except the adipose, with the pectoral (35 -65%) and dorsal (32 -58%) fins exhibiting the greatest amount of fin loss. All fins of hatchery-reared parr became shorter with time. There were minor differences in fin degeneration among parr from the two hatcheries, but the overall pattern of decreasing fin size was similar, indicating a common cause of fin degeneration. Comparison of stream-and hatchery-reared fish is a valuable means of determining the impact of captive environments on fin growth. Published by Elsevier Science B.V.

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