Predation upon Filesnakes (Acrochordus arafurae) by Aboriginal Hunters: Selectivity with Respect to Body Size, Sex and Reproductive Condition

Copeia ◽  
1986 ◽  
Vol 1986 (1) ◽  
pp. 238 ◽  
Author(s):  
Richard Shine
Keyword(s):  
Body Size ◽  
Reproductive Condition ◽  
Acrochordus Arafurae

SEASONAL VARIATION IN BODY SIZE AND REPRODUCTIVE CONDITION OF A PAPER WASP, POLISTES METRICUS (HYMENOPTERA: VESPIDAE)

1980 ◽  
Vol 112 (3) ◽  
pp. 239-248 ◽  
Author(s):  
Constance M. Haggard ◽  
George J. Gamboa
Keyword(s):  
Seasonal Variation ◽  
Body Size ◽  
Older Workers ◽  
The Body ◽  
Paper Wasp ◽  
Head Width ◽  
Reproductive Condition ◽  
Polistes Metricus ◽  
Colony Cycle ◽  
Similar Body

AbstractSeasonal morphometric analysis of 788 adult Polistes metricus Say showed that: (1) Queens sampled throughout the colony cycle were of similar body size but significantly smaller than fall gynes. (2) Queens’ ovaries are large in the spring, decline early in the colony cycle, peak near the mid-postemergence period and decline late in the colony cycle. (3) There are no significant correlations between head width, ovary width, and size of nest in workers or queens. (4) Early and late workers are small but workers emerging during the mid-postemergence period are large. (5) All workers and gynes emerge with small, similar sized ovaries but older workers may develop larger ovaries. (6) Queens are larger than early and late workers but the same size as workers emerging during the mid-postemergence period. (7) The class with the largest adults were intermediates collected when colonies began production of males. These adults, intermediate in fat content between workers and gynes, comprised a large proportion of females emerging late in the colony cycle. (8) The body size of gynes is independent of colony size. (9) Males were significantly more variable in body size than gynes.

scholarly journals Infestation pattern and parasitic castration of the crustacean Riggia paranensis (Crustacea: Cymothoidea) on the fresh water fish Cyphocharax gilbert (Teleostei: Curimatidae)

2006 ◽  
Vol 4 (3) ◽  
pp. 363-369 ◽  
Author(s):  
Juliana de Souza Azevedo ◽  
Leonardo Gomes da Silva ◽  
Carlos Roberto Silveira Fontenelle Bizerri ◽  
Marilvia Alencar Dansa-Petretski ◽  
Neuza Rejane Wille Lima
Keyword(s):  
Growth Rate ◽  
Body Size ◽  
Standard Length ◽  
Fresh Water Fish ◽  
Reproductive Condition ◽  
Parasitic Castration ◽  
Water Fish ◽  
Investment In Reproduction ◽  
Infestation Pattern ◽  
Fast Growth Rate

Cyphocharax gilbert infested by Riggia paranensis shows parasitic castration. The prevalence of parasitism in C. gilbert varied among different environments, being higher in the middle rio Itabapoana. Fish were collected monthly using two cast nets (thrown 30 times during the day) and gillnets kept in the river during 12 hour, from sunset to sunrise, between September 1997 and August 2000. Infestation pattern was investigated on 1358 specimens. Most of them were infested (57.9%), with one or two parasites; the majority (62.9%) was collected during the rainy season (spring-summer). The parasite did not show preference for sex or size of hosts. A total of 91.5% of the 511 examined parasites had a body size that represented 10.1% to 20% of host standard length. The reproductive condition of 311 specimens of R. paranensis was analyzed checking the presence of oocytes in the ovarian and eggs or embryos in the marsupium. Nearly 73% of them were at reproductive phase, and had a body size that represented 5.1% to 20% of host standard length. The size of the immature parasites varied from 0.1% to 5% of the host size. The results suggest that R. paranensis may adopt a fast growth rate strategy and increase the investment in reproduction when they occupy most of the host's pericardial space.

PHYSICAL COMPARISONS OF FOUNDRESSES OF THE PAPER WASP, POLISTES METRICUS (HYMENOPTERA: VESPIDAE)

1981 ◽  
Vol 113 (6) ◽  
pp. 457-461 ◽  
Author(s):  
Jennifer A. Dropkin ◽  
George J. Gamboa
Keyword(s):  
Body Size ◽  
Reproductive Potential ◽  
Paper Wasp ◽  
Reproductive Condition ◽  
Polistes Metricus

AbstractIn the paper wasp, Polistes metricus Say, subordinates and single foundresses of early colonies (< 16 days old) nesting in the same habitat were very similar in size, reproductive condition, and probability of being fertilized suggesting that these types of foundresses are comparable in reproductive potential. Queens of multiple foundress, early colonies were significantly larger, had larger ovaries, and more oocytes than their subordinates. In late colonies (> 30 days old) the differences in reproductive condition between queens and their subordinates were more pronounced. Reproductive condition and body size are likely to be important characters for sorting foundresses into hierarchies.

Adolescent Gender Differences in Weight, Activity, and Body-Size Perception

2012 ◽  
Author(s):  
Judith R. Mccalla ◽  
Katie E. Chipungu ◽  
Patrice G. Saab ◽  
Amanda J. Countryman ◽  
Erin N. Etzel ◽  
...  
Keyword(s):  
Gender Differences ◽  
Body Size ◽  
Size Perception ◽  
Body Size Perception

Maternal body size and condition determine calf growth rates in southern right whales

2018 ◽  
Vol 592 ◽  
pp. 267-281 ◽  
Author(s):  
F Christiansen ◽  
F Vivier ◽  
C Charlton ◽  
R Ward ◽  
A Amerson ◽  
...  
Keyword(s):  
Body Size ◽  
Growth Rates ◽  
Maternal Body ◽  
Calf Growth ◽  
Right Whales ◽  
Southern Right Whales
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