Oviposition Habits of Simulium kawamurae (Diptera: Simuliidae), with Reference to Seasonal Changes in Body Size and Fecundity

1992 ◽  
Vol 29 (4) ◽  
pp. 603-610 ◽  
Author(s):  
Minoru Baba
Keyword(s):  
Body Size ◽  
Seasonal Changes

scholarly journals Seasonal changes in body size and oil sac volume of three planktonic copepods, Paracalanus parvus (Claus, 1863), Pseudocalanus newmani Frost, 1989 and Oithona similis Claus, 1866, in a temperate embayment: what controls their seasonality?

Crustaceana ◽  
2014 ◽  
Vol 87 (3) ◽  
pp. 364-375 ◽  
Author(s):  
Daichi Arima ◽  
Atsushi Yamaguchi ◽  
Yoshiyuki Abe ◽  
Kohei Matsuno ◽  
Rui Saito ◽  
...  
Keyword(s):  
Body Size ◽  
Seasonal Changes ◽  
Primary Energy ◽  
Specific Pattern ◽  
Peak Period ◽  
Oithona Similis ◽  
Warm Summer ◽  
Cold Spring ◽  
Species Specific ◽  
Paracalanus Parvus

Seasonal changes in body size (prosome length: PL) and oil sac volume (OSV) of the three most numerically abundant copepods in Ishikari Bay, northern Sea of Japan, Paracalanus parvus (Claus, 1863), Pseudocalanus newmani Frost, 1989 and Oithona similis Claus, 1866, were studied using monthly samples collected through vertical hauls of a 100-μm mesh NORPAC net from March, 2001 to May, 2002. Seasonal changes in PL were common for the three species and were more pronounced during a cold spring. PL was negatively correlated with temperature, and this relationship was described well using the Bělehrádek equation. Seasonal changes in OSV exhibited a species-specific pattern, i.e., OSV was greater during a warm summer for P. parvus and was greater during a cold spring for P. newmani and O. similis. The OSV peak period corresponded with the optimal thermal season of each species. The relative OSV to prosome volume of the small copepods (0.6-0.8%) was substantially lower than that of the large copepods (20-32%). These facts suggest that the oil sac of small copepods is not used for overwintering or diapauses or during periods of food scarcity, but is instead used as the primary energy source for reproduction, which occurs during the optimum thermal season of each species.

scholarly journals Is body size important? Seasonal changes in morphology in two grass-feeding Abacarus mites

2017 ◽  
Vol 72 (4) ◽  
pp. 317-328 ◽  
Author(s):  
Alicja Laska ◽  
Brian G. Rector ◽  
Lechosław Kuczyński ◽  
Anna Skoracka
Keyword(s):  
Body Size ◽  
Seasonal Changes

scholarly journals Seasonal changes in the body size of two rotifer species living in activated sludge follow the Temperature‐Size Rule

2014 ◽  
Vol 4 (24) ◽  
pp. 4678-4689 ◽  
Author(s):  
Anna Kiełbasa ◽  
Aleksandra Walczyńska ◽  
Edyta Fiałkowska ◽  
Agnieszka Pajdak‐Stós ◽  
Jan Kozłowski
Keyword(s):  
Body Size ◽  
Activated Sludge ◽  
Seasonal Changes ◽  
The Body ◽  
Rotifer Species

Seasonal changes in body size, sexual size dimorphism and sex ratio in relation to mating system in an adult odonate community

2010 ◽  
Vol 25 (1) ◽  
pp. 59-75 ◽  
Author(s):  
Jesús Wong-Muñoz ◽  
Alex Córdoba-Aguilar ◽  
Raúl Cueva del Castillo ◽  
Martín A. Serrano-Meneses ◽  
John Payne
Keyword(s):  
Body Size ◽  
Sex Ratio ◽  
Mating System ◽  
Seasonal Changes ◽  
Sexual Size Dimorphism ◽  
Size Dimorphism

scholarly journals Size composition and seasonal changes in abundance of juvenile sole, Solea solea, in the Severn Estuary and Inner Bristol Channel

1987 ◽  
Vol 67 (3) ◽  
pp. 561-569 ◽  
Author(s):  
P. N. Claridge ◽  
I. C. Potter
Keyword(s):  
Body Size ◽  
Relative Abundance ◽  
Seasonal Changes ◽  
Size Composition ◽  
Marine Species ◽  
Severn Estuary ◽  
Resultant Data ◽  
Solea Solea ◽  
The Times ◽  
Seasonal Data

During a period of five years in the mid-1970s, fish were collected at weekly intervals from the Severn Estuary and Bristol Channel. The resultant data on the abundance and lengths of these fish have provided valuable information on the times when the juveniles of several marine species are recruited into the estuary and on their pattern of growth during the first years of life (Claridge & Gardner, 1977; Titmus, Claridge & Potter, 1978; Claridge & Potter, 1983, 1984, 1985; Potter & Claridge, 1985). One of the marine species found in the Severn Estuary for which no seasonal data on density or body size have been presented is the sole, Solea solea (L.), whose relative abundance ranked it amongst the top ten species in two of the five years of our study (Claridge, Potter & Hardisty, 1986).

scholarly journals A fitness trade-off between seasons causes multigenerational cycles in phenotype and population size

eLife ◽  
2017 ◽  
Vol 6 ◽  
Author(s):  
Gustavo S Betini ◽  
Andrew G McAdam ◽  
Cortland K Griswold ◽  
D Ryan Norris
Keyword(s):  
Population Dynamics ◽  
Life History ◽  
Body Size ◽  
Natural Selection ◽  
Density Dependence ◽  
Seasonal Changes ◽  
Population Cycles ◽  
Trade Off ◽  
Viability Selection ◽  
Trade Offs

Although seasonality is widespread and can cause fluctuations in the intensity and direction of natural selection, we have little information about the consequences of seasonal fitness trade-offs for population dynamics. Here we exposed populations of Drosophila melanogaster to repeated seasonal changes in resources across 58 generations and used experimental and mathematical approaches to investigate how viability selection on body size in the non-breeding season could affect demography. We show that opposing seasonal episodes of natural selection on body size interacted with both direct and delayed density dependence to cause populations to undergo predictable multigenerational density cycles. Our results provide evidence that seasonality can set the conditions for life-history trade-offs and density dependence, which can, in turn, interact to cause multigenerational population cycles.

Feeding habits of the apron ray,Discopyge tschudii(Elasmobranchii: Narcinidae), from off Uruguay and northern Argentina

2012 ◽  
Vol 93 (2) ◽  
pp. 291-297 ◽  
Author(s):  
M. Cecilia Spath ◽  
Santiago A. Barbini ◽  
Daniel E. Figueroa
Keyword(s):  
Body Size ◽  
Seasonal Changes ◽  
Feeding Habits ◽  
Cold Season ◽  
Relative Importance ◽  
Multiple Hypothesis ◽  
Index Of Relative Importance ◽  
Discopyge Tschudii ◽  
Modelling Approach

The feeding habits of the apron ray,Discopyge tschudii, were investigated, off Uruguay and northern Argentina, and we tested the hypothesis that the diet changes with increasing body size, between sexes and seasons using a multiple-hypothesis modelling approach.Discopyge tschudiipreys mainly on polychaetes (88.77% index of relative importance (IRI)) followed by siphons of the clamAmiantis purpurata(8.13% IRI) and amphipods (3.08% IRI). Ontogenetic, sexual and seasonal changes were found. Larger individuals ofD. tschudiiconsumed buried polychaetes more often. The consumption of errant polychaetes was higher in males and in the cold season. Also, amphipods were preyed on more heavily by females and the number of siphons ofA. purpurataconsumed was higher in the cold season.

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