Temperature-dependent energy partitioning in the benthic copepods <i>Acanthocyclops viridis</i> and <i>Macrocyclops albidus</i>

Laybourn‐Parry, Johanna; Abdullahi, B. A.; Tinson, Stuart

doi:10.1139/z88-397

Cited by 25 publications

(30 citation statements)

References 22 publications

(20 reference statements)

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“…This intraspecific difference corroborates with results from other zooplankton systems (e.g. Laybourn-Parry et al, 1988;Marten & Reid, 2007;Cuthbert et al, 2019c).…”

Section: Discussionsupporting

confidence: 91%

“…These effects may be driven by differences in satiation levels between the two predator sexes, with energy demands by females often higher in copepods (e.g. Laybourn-Parry et al, 1988;Cuthbert et al, 2019c). For male L. raynerae, the effects of habitat structure on handling times were less prevalent, and therefore maximum feeding rates remained relatively unaffected.…”

Section: Discussionmentioning

confidence: 99%

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Sex demographics alter the effect of habitat structure on predation by a temporary pond specialist

et al. 2019

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Habitat structure can profoundly influence interaction strengths between predators and prey. Spatio-temporal habitat structure in temporary wetland ecosystems is particularly variable because of fluctuations in water levels and vegetation colonisation dynamics. Demographic characteristics within animal populations may also alter the influence of habitat structure on biotic interactions, but have remained untested. Here, we investigate the influence of vegetation habitat structure on the consumption of larval mosquito prey by the calanoid copepod Lovenula raynerae, a temporary pond specialist. Increased

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“…This intraspecific difference corroborates with results from other zooplankton systems (e.g. Laybourn-Parry et al, 1988;Marten & Reid, 2007;Cuthbert et al, 2019c).…”

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Sex demographics alter the effect of habitat structure on predation by a temporary pond specialist

et al. 2019

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“…at 4°C -33% of the weight loss during 7 cl at limiting food was due to spawning of eggs, indicating that the remainder was somatic weight respired to meet energy needs . The partitioning of energy between gonad and soma may change with temperature; in the benthic copepods Acanthocyclops viridis and Macrocyclops albidus, the proportion of ingested energy directed\ toward reproduction increased with temperature at the expense of somatic growth and respiration rate (Laybourn-Parry et al 1988).…”

Section: Discussionmentioning

confidence: 99%

Effects of temperature and food abundance on grazing and short‐term weight change in the marine copepod Acartia hudsonica

Durbin

1992

Limnology & Oceanography

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Ingestion and short-term weight change in adult female Acartia hudsonica were investigated at 4. 5", 8", 12", and 16°C with the solitary diatom Thalassiosira constricta as food. Narragansett Bay copepods were preadapted to the desired temperature and saturating food level for 3 d to standardize feeding history before the experiments. Maximal ingestion rates at the four temperatures were 16,460, 14,120, 2 1,470, and 29,960 cells copepod-'d-l or 43.9, 37.2, 67.9, and 92.9% body C (Q10 = 2.3) and 34.2, 30.7, 42.6, and 74.7% body N d-' (Q10 = 2.4). The critical concentration varied between 840 and 1,900 cells ml-' (0.17-0.23 pg C ml-l) and was not significantly related to temperature. Maximal clearance rate was similar at all temperatures (20.8-23.9 ml copepod-Id-l), but .on a weight-specific basis increased from 3.3 to 6.0 ml (pg copepod C)-'d -I between 4.5" and 16°C (Q10 = 1.8). Feeding rates at 4.5" and 8°C were similar; the seemingly low ingestion rates at 8°C were interpreted as evidence for a senescent population of adult copepods in the bay from late April to early May.During preadaptation at high food, A. hudsonica body C and N either stayed constant (indicating saturating food in the field) or increased (indicating food limitation in situ). Body weight was sensitive to variation in food supply; during the 24-h feeding experiments weight remained stable at the two highest food levels, but declined significantly at lower levels. Maximal observed weight loss was temperature-dependent, increasing from -15% C and 12% N d-l at 4.5"C to 25% C and 17% N d-l at 16°C. The relationship between temperature and feeding rate in marine copepods has seldom been investigated, although temperature effects on respiration, reproduction, growth and development, and gut evacuation are relatively well known (e.g. Mullin and Brooks 1970; Vidal 1980~;Dam and Peterson 1988;McLaren et al. 1989). Of particular interest are the effects of temperature on the maximum rates of feeding (I,,,) and clearance (E,,,), and the food concentrations associated with the lower feeding threshold (C,) and the attainment of Imax (the critical concentration Cc), as these parameters define the functional relationship between food abundance and feeding rate Acknowledgments We thank Robert G. Campbell for assistance in the field and laboratory work, Einar Hjorleifsson for advice concerning computer analysis of the data, R. Choudary Hanumara for statistical advice, Theodore J. Smayda for permission to use the C-N analyzer in his laboratory, and Marilyn Maley for assistance in manuscript preparation. We also thank three reviewers for their comments on the manuscript.

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“…A simple explanation for this phenomenon could be gender dimorphism of copepods, with females being clearly larger than males and thus providing better conditions for the growth and development of larvae to the infective stage. As an alternative explanation, faster development and shorter longevity of males than females could also be taken into account (Laybourn-Parry et al 1988;Jakobsen and Wedekind 1998).…”

Section: Discussionmentioning

confidence: 99%

Seasonal occurrence of the tapeworm Proteocephalus longicollis and its transmission from copepod intermediate host to fish

Hanzelová

Gerdeau×²

2003

Parasitology Research

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Seasonal occurrence in terms of prevalence, intensity of infection, abundance and density of the tapeworm Proteocephalus longicollis (Zeder, 1800) and its transmission between its intermediate host (Cyclops abyssorum prealpinus) and definitive host (common whitefish, Coregonus lavaretus) in Lake Annecy, an oligotrophic lake in the western part of the Alps, France, were studied in the period of 1998-2000. A copepod Cyclops abyssorum prealpinus (Kiefer, 1939), the dominant species among planktonic crustaceans in the lake, served as the only intermediate host for this parasite. Infection with plerocercoids was higher in adult copepods (predominantly females) than in copepodite stages IV and V. The prevalence rate of 25% found in C. abyssorum prealpinus females in June 1998 represents a unique infection rate of intermediate hosts with fish tapeworms in natural conditions. The final host, the common whitefish Coregonus lavaretus (L.), was heavily infected with P. longicollis throughout the year (prevalence 90%; mean abundance 40.3; maximum intensity of infection more than 500 tapeworms per fish); immature tapeworms predominated in all samples (P<0.01). Transmission of tapeworm larvae from copepods to the common whitefish took place most intensively in summer and autumn, and depended on seasonal changes in the density of the C. abyssorum prealpinus population, infection of this copepod with plerocercoids and their density in the lake. In addition, transmission efficiency also seems to be determined by the longevity of tapeworm larvae in the intermediate host, timing of predation of the fish host and rapid development of the parasite within this host during the summer period. Overall transmission potential of P. longicollis was low, with only about 9% of juvenile specimens reaching maturity in common whitefish.

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Temperature-dependent energy partitioning in the benthic copepods Acanthocyclops viridis and Macrocyclops albidus

Cited by 25 publications

References 22 publications

Sex demographics alter the effect of habitat structure on predation by a temporary pond specialist

Sex demographics alter the effect of habitat structure on predation by a temporary pond specialist

Effects of temperature and food abundance on grazing and short‐term weight change in the marine copepod Acartia hudsonica

Seasonal occurrence of the tapeworm Proteocephalus longicollis and its transmission from copepod intermediate host to fish

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