Physiological energetics and ecophysiology

Wieser, Wolfgang

doi:10.1007/978-94-011-3092-9_15

Cited by 38 publications

(37 citation statements)

References 61 publications

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“…Nevertheless, we have no evidence about an accute boundary in term of lethality at low temperatures (boundary between still tolerated and lethal temperature) in range under 9 °C (generally, temperature 9 °C should be sublethal, in accordance to common situation in cyprinids - Wieser (1991)). However, it is highly recommended to distinguish and evaluate an impact of temperatures 9 and 12 °C (temperatures close to the lower boundary of the thermal tolerance range as Pepin et al (1997) in Atlantic cod) on the embryonic and larval period up to finish of hatching only (survival over 50%), in contrast to possible other effect of these lower temperatures in context of the whole early ontogeny (it is a topic for the next possible study).…”

Section: Table III Total Length Of M Fossilis Larvae (Mean ± Sd) Amentioning

confidence: 99%

Effect of temperature on early life history in weatherfish,Misgurnus fossilis(L. 1758)

Drozd

Kouřil

Bláha

et al. 2009

Knowl. Managt. Aquatic Ecosyst.

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Effect of incubation temperature (range: 9-36 °C; interval: 3 °C) on artificially propagated weatherfish (Misgurnus fossilis) early ontogeny (during interval from egg fertilization to the finish of hatching) was investigated. Both, the amplitude of the incubation period (evaluated in four crucial moments), the total hatching period duration was inversely proportional to the incubation temperature and ranged from 17.5 days at 9 °C to 1.8 days at 24 °C (expressed at H 50 ) or from 137 hours at 9 °C to 9 hours at 24 °C, respectively. There were no influence of rising temperature on the total length of newly hatched larvae (T L = 4.23-4.67 mm), in contrast to negative correlation with developmental stage (9-18 °C: stage 37; 21-24 °C: stage 36), i.e. the length might determine the age at hatching, rather than the age at hatching determines the hatching length. The thermal tolerance range in term of survival lies between 9 and 24 °C (the thermal optimum 15-24 °C, i.e. weatherfish is a warm-mesothermic species). Temperatures above 24 °C (in our study 27-36 °C) are considered the lethal temperatures already during embryonic period. It is highly recommended to distinguish an impact of suboptimal temperatures 9-12 °C on development during explored interval only, in contrast to possible other effect of these lower temperatures in context of the whole early ontogeny. RÉSUMÉEffets de la température sur les premiers stades de vie de la loche d'étang, Misgurnus fossilis (L. 1758) L'effet de la température d'incubation (gamme : 9-36 °C, intervalles : 3 °C) sur les premiers stades ontogéniques de loches d'étang (Misgurnus fossilis) (de la fécon-dation à la fin de l'éclosion) a été étudié. La durée de la période d'incubation (évaluée à quatre moments clés) et la durée de la période d'éclosion des oeufs d'un lot sont inversement proportionnelles à la température d'incubation et s'étalent de 17,5 jours à 9 °C à 1,8 jour à 24 °C (pour l'indice H 50 ) et de 137 heures à 9 °C à 9 heures à 24 °C, respectivement. Il n'y a pas d'influence d'une élévation de température sur la longueur totale des larves à l'éclosion (T L = 4,23-4,67 mm), alors qu'il y a une corrélation négative avec le stade de développement (9-18 °C : stade 37 ; 21-24 °C : stade 36), i.e. la longueur semble déterminer l'âge à l'éclo-sion, plutôt que l'âge à l'éclosion déterminerait la longueur à l'éclosion. La gamme

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Section: Table III Total Length Of M Fossilis Larvae (Mean ± Sd) Amentioning

confidence: 99%

Effect of temperature on early life history in weatherfish,Misgurnus fossilis(L. 1758)

Drozd

Kouřil

Bláha

et al. 2009

Knowl. Managt. Aquatic Ecosyst.

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“…As in the case of birds, this constancy can be presumed to assure a mechanism for counter-current gaseous exchange providing a contact time between erythrocytes and oxygen that is of adequate length. The continued effectiveness of gaseous exchange may be further supported through regulation of the flow of oxygenated water through the gills (WIESER 1991). However, our study clearly shows that farmed species, in spite of the constancy HB/TSAE ratio between analyzed seasons, can differ with respect to its values in comparison to other -wild-live fish, as a result of probably different physiological adaptations.…”

Section: Discussionmentioning

confidence: 61%

“…In contrast, the present work reveals seasonal differences of the same nature in all species considered. The higher (increased) Hb concentration in autumn is most probably conditioned by declining amounts of dissolved oxygen in water, itself a result of higher summer temperatures (WIESER 1991, NIKINMAA 2002, GUIJARRO et al 2003. This is the oldest-known evolutionary mechanism by which the circulatory system responds to hypoxia (NIKINMAA 2002), and the differences it achieves give rise to a proportionally greater total surface area of erythrocytes (TSAE), this in turn being interpretable as an appropriate response in terms of the surface area available for gaseous exchange.…”

Section: Discussionmentioning

confidence: 99%

“…It is considered then that the HB/TSAE ratio exemplifies one of the most important hematological indices for indirectly describing metabolic properties of organisms (KOSTELECKA-MYRCHA 2002). The amount of oxygen carried by erythrocytes in a unit of time depends on the blood flow rate (NIKINMAA 2001) while the efficiency of gas exchange is influenced by the flow rate of fresh water through the gills (WIESER 1991). In fish, however, the mechanism of cross-current gas exchange probably ensures sufficient contact time of erythrocytes with oxygen independently of the blood flow rate in the gills.…”

Section: Discussionmentioning

confidence: 99%

“…While it is known that a significant influence on values of the aforementioned indices is exerted by a number of different external factors (FILHO et al 1992, LUSKOVÁ 1997, YTRESTØYL et al 2001, NESPOLO and ROSENMANN 2002, NIKINMAA 2002, these have frequently proved hard to define precisely in artificial laboratory or farm conditions. A good example here might be seasonality of climate as manifested in temperature change and oxygenation of water, among other things, these undoubtedly influence values for haematological parameters in fish (WIESER 1991, LUSKOVÁ 1997, 1998. Likewise, in spite of the now well-documented influence of the external environment on blood morphology, the directions to seasonal changes in values for the haematological parameters in the animal group in question have remained unclear (GUIJARRO et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Regularities of Variation of the Red Blood Indices Characterizing the Respiratory Function of Blood in Selected Fish

Maciak¹,

Kostelecka‐Myrcha²

2011

Zoologica Poloniae

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There is a large diversity of red blood indices determining oxygen transport ability in vertebrates. In fish this diversity is particularly large, probably due to the great variability in water environments, which impedes the possibility of finding and understanding general patterns. It has been assumed that in mammals, the measure determining the ability of a blood unit to transport oxygen is the ratio of hemoglobin concentration (HB) and total erythrocyte surface area (TSAE). It was also shown that both in mammals and birds the amount of hemoglobin per total surface area unit (Hb/ TSAE) conditions maximum use of respiratory pigment in oxygen transport, in different physiological and environmental conditions. In order to check whether this regularity occurs in fish, red blood indices were analyzed in seven species of freshwater fish, differing noticeably in their biology and body mass in two seasons of the year. Notwithstanding this marked seasonal variability to the component variables together determining the total surface area of erythrocytes, the value for TSAE was found to differ in proportion to the higher or lower concentrations of HB. In consequence, the HB/TSAE ratio indicative of the maximal use of haemoglobin in the transport of oxygen was constant in all of the fish studied between analyzed seasons. This constancy resembling that to be noted in birds is most probably related to the counter-current gaseous exchange ongoing in the gills of fish.

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Seasonal Movements of Coarse Fish in Lowland Rivers and their Relevance to Fisheries Management

Lucas

Mercer

Peirson

et al. 2000

Management and Ecology of River Fisheries

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Physiological energetics and ecophysiology

Cited by 38 publications

References 61 publications

Effect of temperature on early life history in weatherfish,Misgurnus fossilis(L. 1758)

Effect of temperature on early life history in weatherfish,Misgurnus fossilis(L. 1758)

Regularities of Variation of the Red Blood Indices Characterizing the Respiratory Function of Blood in Selected Fish

Seasonal Movements of Coarse Fish in Lowland Rivers and their Relevance to Fisheries Management

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