The Life Cycle of the Tennessee Brook Lamprey, Ichthyomyzon hubbsi Raney

Potter, I.C.; Bailey, Joseph R.

doi:10.2307/1442918

Cited by 12 publications

(5 citation statements)

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“…The small size is illustrated by the observation that, apart from a group caught in one Southwestern Australian brook having mean lengths of 102-106 mm in three successive years 16, all the populations of G. australis investigated in Australia, New Zealand and Chile entered metamorphosis at mean lengths and weights below 100 mm and 1.2 gl6,21-23. Although G. australis grows throughout larval life, comparisons between length data for this species and those for representatives of Mordacia, Ichthyomyzon, Petromyzon, Tetrapleurodon and Larnpetra9,~l, [17][18][19]24 show that the growth rate of larval G.australis is relatively slow. For example, the ammocoetes of G. australis reach an average length of only 55 mm by the end of their second year of life, while comparable values for the other species range from above 55 to 135 ram.…”

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confidence: 87%

“…This situation contrasts with the absence of an increase in length in the final year of larval life in several holarctie species and the southern hemisphere Mordaeia mordax2. 9,11,17,18. During this so-called arrested growth phase 9, the larvae of these species store a large amount of lipid, which subsequently acts as an important energy source during the ensuing lengthy non-trophic period of metamorphosis 6' 20 Since the relative amount of lipid also increases during the terminal part of larval life in G. australis 2~, this species utilizes the food it assimilates in the months preceding metamorphosis for accumulating fat as well as increasing in length, albeit at a reduced rate.…”

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confidence: 99%

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Growth and the average duration of larval life in the southern hemisphere lamprey,Geotria australis Gray

Potter

Hilliard

1986

Experientia

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confidence: 87%

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confidence: 99%

Growth and the average duration of larval life in the southern hemisphere lamprey,Geotria australis Gray

Potter

Hilliard

1986

Experientia

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“…It is particularly surprising that growth was not depressed during the summer months when stream temperatures remained only a few degrees below the ultimate incipient lethal level for many lampreys including P. marinus, L. planeri, L. lamottenii and I. jossor . Generally, ammocoetes of the holarctic lampreys exhibit pronounced seasonal variation in length increment with most growth occurring in the warmer months when stream temperatures may approach 18-20" C (Potter & Bailey 1972, Lowe et al 1973, O'Boyle & Beamish 1977. During winter when streams approach 0°C larval growth may be negligible or even negative (Thomas 1962).…”

Section: Age and Growthmentioning

confidence: 99%

Biology of the southern brook lamprey,Ichthyomyzon gagei

William

Beamish

1982

Environ Biol Fish

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SynopsisLarval, metamorphosing and adult representatives of the southern brook lamprey, lchthyomyzon gagei, were collected from Choclafaula Creek in Alabama to provide information on aspects of its life cycle. The proportional length of the prebranchial; branchal, trunk and tail regions changed throughout larval life in a pattern similar to that demonstrated in other lampreys. Body depth changed also throughout much of larval life. Oral disc, dorsal fin height, and eye diameter increased through all or most of metamorphosis and the adult interval. Length-frequency curves for larvae indicate a larval life of 3 $ 4 years. Growth rate, reflected by change in total length, was constant throughout the year for each age group. S& ratio of larval I. gagei was 16 : 1.020. Metamorphosis is initiated in early September and is completed between early February and mid March. Adult I. gagei spawn between mid April and early May. The number of oocytes ranged from 820-2485 between 95-1 50 mm total length. The maximum gonadosomic ratio in males was 17.1 and 26.3% in females.

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“…Benthic habitat in streams is essential for lamprey ammocoetes, given that much of their lives are spent burrowed in the bottom substrate Potter and Bailey 1972;Beamish 1982;. Not only do they require adequate substrate to feed and breathe properly, but substrate also serves as a refuge from predators Kearn 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Some researchers have suggested habitat degradation as a possible cause for declines of lamprey populations . Degradation of benthic habitat in streams is likely associated with population declines because larval lampreys (ammocoetes) burrow in benthic habitats (Potter and Bailey 1972;Beamish 1982;Beamish and Thomas 1984;Beamish and Medland 1988). Adult lampreys construct nests and deposit eggs within high velocity areas of streams .…”

Section: Introductionmentioning

confidence: 99%

Habitat selection and predation risk in larval lampreys

Smith¹

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Habitat Selection and Predation Risk in Larval Lampreys Dustin M. Smith This thesis examines habitat preference and the influence of habitat on predation of larvae (ammocoetes) of the least brook lamprey (Lampetra aepyptera). The thesis comprises three chapters: (1) an introduction and literature review on the general life history of lampreys and on studies related to ammocoetes and their habitat, (2) an experimental study of habitat preference in ammocoetes of the least brook lamprey, and (3) an experimental study of the relationship between habitat availability and predation risk in ammocoetes. For the first study, we quantified substrate selection in small (< 50 mm) and large (100-150 mm) ammocoetes of the least brook lamprey. In aquaria, ammocoetes were given a choice to burrow into six equallyavailable substrate types: small gravel (2.36-4.75 mm), coarse sand (0.5-1.4 mm), fine sand (0.125-0.5 mm), organic debris (approximately 70% decomposing leaves and stems, 15% silt, and 15% sand), an even mixture of silt, clay, and fine sand, and silt/clay (< 0.063 mm). Fine sand was selected with a significantly higher probability than any other substrate. In the second study, we experimentally examined the influence of habitat availability on predation risk of ammocoetes. Ammocoetes were placed in aquaria containing a predator species (yellow bullhead, Ameiurus natalis) and one of 3 substrates: fine sand (0.125-0.5 mm), coarse sand (0.5-1.4 mm), or silt/clay (<0.063 mm). Use of the three substrate types was based on a previous experiment where fine sand was determined to be the preferred benthic habitat of least brook lamprey. Based on 10 trials with each habitat type, survival of ammocoetes was highest in aquaria with fine sand (mean = 80%), and lower in those with coarse sand (mean = 58%) and silt/clay (mean = 4%). The results of both studies conducted indicate that populations of least brook lamprey ammocoetes may be limited by the availability of fine sand habitat. The first study indicated that least brook lamprey ammocoetes are habitat specialists, preferring substrates composed primarily of fine sand. The second study showed that the availability of fine sand habitat may influence the predation risk of ammocoetes, as ammocoete survival from predation was highest in fine sand, and lower in other substrates. iii Acknowledgments I would like to thank Dr. Stuart Welsh, the WVU Division of Forestry and Natural Resources, and the USGS Cooperative Fish and Wildlife Research Unit for allowing me the opportunity to attend graduate school and be a part of this very interesting study. I must extend a special thanks to Dr. Stuart Welsh for the support, guidance, and infinite words of wisdom provided throughout my time here. Thanks also go to Dr. Kyle Hartman and Dan Cincotta for serving on my committee and for their useful suggestions along the way. A special thanks goes to Dan Cincotta for introducing me to the field of ichthyology and to the fascinating world of non-game fishes. Additionally, I would like to thank the WV...

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The Life Cycle of the Tennessee Brook Lamprey, Ichthyomyzon hubbsi Raney

Cited by 12 publications

References 9 publications

Growth and the average duration of larval life in the southern hemisphere lamprey,Geotria australis Gray

Growth and the average duration of larval life in the southern hemisphere lamprey,Geotria australis Gray

Biology of the southern brook lamprey,Ichthyomyzon gagei

Habitat selection and predation risk in larval lampreys

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