The respiration rate of the resting eggs of Leptodora kindti (Focke 1844) and Bythotrephes longimanus Leydig 1860 (Crustacea, Cladocera) at environmentally encountered temperatures

Oecologia ◽  
1984 ◽  
Vol 64 (2) ◽  
pp. 241-244 ◽  
Author(s):  
Tony E. Andrew ◽  
Alois Herzig
Keyword(s):  
Respiration Rate ◽  
Resting Eggs ◽  
Bythotrephes Longimanus ◽  
Leptodora Kindti

Changes in the crustacean communities of Lakes Michigan, Huron, and Erie following the invasion of the predatory cladoceran Bythotrephes longimanus

2004 ◽  
Vol 61 (11) ◽  
pp. 2111-2125 ◽  
Author(s):  
Richard P Barbiero ◽  
Marc L Tuchman
Keyword(s):  
Zooplankton Community ◽  
Crustacean Zooplankton ◽  
Bythotrephes Longimanus ◽  
Zooplankton Community Structure ◽  
Cladoceran Species ◽  
Invertebrate Predators ◽  
Predatory Cladoceran ◽  
Leptodora Kindti ◽  
Escape Responses ◽  
Zooplankton Communities

The crustacean zooplankton communities in Lakes Michigan and Huron and the central and eastern basins of Lake Erie have shown substantial, persistent changes since the invasion of the predatory cladoceran Bythotrephes in the mid-1980s. A number of cladoceran species have declined dramatically since the invasion, including Eubosmina coregoni, Holopedium gibberum, Daphnia retrocurva, Daphnia pulicaria, and Leptodora kindti, and overall species richness has decreased as a result. Copepods have been relatively unaffected, with the notable exception of Meso cyclops edax, which has virtually disappeared from the lakes. These species shifts have for the most part been consistent and equally pronounced across all three lakes. Responses of crustacean species to the Bythotrephes invasion do not appear to be solely a consequence of size, and it is likely that other factors, e.g., morphology, vertical distribution, or escape responses, are important determinants of vulnerability to predation. Our results indicate that invertebrate predators in general, and invasive ones in particular, can have pronounced, lasting effects on zooplankton community structure.

Nature and nurture in dormancy: dissolved oxygen, pH, and maternal investment impact Bythotrephes longimanus resting egg emergence and neonate condition

2008 ◽  
Vol 65 (8) ◽  
pp. 1692-1704 ◽  
Author(s):  
Meghan Elizabeth Brown
Keyword(s):  
Dissolved Oxygen ◽  
Hatching Success ◽  
Maternal Investment ◽  
Resting Eggs ◽  
Suitable Habitat ◽  
Bythotrephes Longimanus ◽  
Energy Investment ◽  
Resting Egg ◽  
Life Cycle Stages ◽  
Nature And Nurture

Bythotrephes longimanus (Onychopoda: Cercopagidae), an invasive zooplankter in North America, requires suitable habitat to satisfy its planktonic and resting stages, which occupy the pelagia and sediment of lakes, respectively. Thousands of resting eggs from hundreds of planktonic mothers were exposed to laboratory conditions that mimicked gradients observed in lake sediment (dissolved oxygen = 1.4–11.9 mg·L–1; pH = 3–11). Eggs hatched in all treatments, which confirms the utility of dormancy and the robustness of the resting egg in B. longimanus. However, hatching success and neonate condition were greatest when dormancy conditions were maintained at near-saturated dissolved oxygen and near-neutral pH; deviations from these conditions resulted in prolonged development, smaller neonates, and the failure of many eggs to hatch. In addition to the influence of environmental conditions, heavier mothers produced larger eggs that hatched more frequently and resulted in heavier neonates. These maternal effects are likely due to greater energy investment by healthier mothers. This study suggests that nature and nurture influence dormancy success, and the results underscore that both life-cycle stages of B. longimanus need to be considered to understand its range expansion.

scholarly journals Effects of chemical and physical conditions on hatching success of Bythotrephes longimanus resting eggs

2013 ◽  
Vol 58 (6) ◽  
pp. 2171-2184 ◽  
Author(s):  
Donn K. Branstrator ◽  
Lyle J. Shannon ◽  
Meghan E. Brown ◽  
Marte T. Kitson
Keyword(s):  
Hatching Success ◽  
Resting Eggs ◽  
Bythotrephes Longimanus ◽  
Physical Conditions

EFFECT OF VARIOUS HORMONES ON THE KIDNEY RESPIRATION RATES IN THE CUTTHROAT TROUT (SALMO CLARKI CLARKI)

1960 ◽  
Vol XXXIII (III) ◽  
pp. 428-436 ◽  
Author(s):  
W. N. Holmes
Keyword(s):  
Single Dose ◽  
Respiration Rate ◽  
Cutthroat Trout ◽  
Adaptive Mechanism ◽  
Respiration Rates ◽  
Salmo Clarki

ABSTRACT Relatively large doses of vasopressin administered intraperitoneally to the trout significantly enhanced the kidney respiration rate. In contrast to vasopressin a single dose of oxytocin depressed the kidney Qo2 value. This depression continued throughout the observed 24 hour period after injection. Cortisol enhanced the kidney Qo2 values significantly and to a greater extent than vasopressin. These results are discussed in relation to possible adaptive mechanism in euryhaline species of teleosts.

The Effect of Sprinkling on the Respiration Rate, Body Temperature, Grazing Performance and Milk Production of Dairy Cattle

1951 ◽  
Vol 10 (4) ◽  
pp. 961-968 ◽  
Author(s):  
G. D. Miller ◽  
J. B. Frye ◽  
B. J. Burch ◽  
P. J. Henderson ◽  
L. L. Rusoff
Keyword(s):  
Body Temperature ◽  
Dairy Cattle ◽  
Milk Production ◽  
Respiration Rate
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