A comparative cytological investigation of the reproductive cycle of an amphimictic diploid and a parthenogenetic triploid form of Lumbricillus lineatus (O.F.M.) (Oligochaeta, Enchytraeidae)

Chromosoma ◽  
1960 ◽  
Vol 11 (1) ◽  
pp. 365-379 ◽  
Author(s):  
B. Christensen
Keyword(s):  
Reproductive Cycle ◽  
Cytological Investigation ◽  
Triploid Form

Core body temperature is not a valid parameter to follow the reproductive cycle in female marmoset monkey (Callithrix jacchus)

2013 ◽  
Vol 121 (10) ◽  
Author(s):  
K Hoffmann ◽  
J König ◽  
K Eildermann ◽  
E Fuchs ◽  
R Behr ◽  
...  
Keyword(s):  
Body Temperature ◽  
Reproductive Cycle ◽  
Core Body Temperature ◽  
Callithrix Jacchus ◽  
Marmoset Monkey ◽  
Core Body

Elevated nest predation risk promotes offspring size variation in birds with prolonged parental care.

2019 ◽  
Author(s):  
Gretchen F. Wagner ◽  
Emeline Mourocq ◽  
Michael Griesser
Keyword(s):  
Predation Risk ◽  
Reproductive Cycle ◽  
Perceived Risk ◽  
Nest Predation ◽  
Bird Species ◽  
Size Variation ◽  
Egg Laying ◽  
Offspring Size ◽  
Natural Predation ◽  
Risk Spreading

Predation of offspring is the main cause of reproductive failure in many species, and the mere fear of offspring predation shapes reproductive strategies. Yet, natural predation risk is ubiquitously variable and can be unpredictable. Consequently, the perceived prospect of predation early in a reproductive cycle may not reflect the actual risk to ensuing offspring. An increased variance in investment across offspring has been linked to breeding in unpredictable environments in several taxa, but has so far been overlooked as a maternal response to temporal variation in predation risk. Here, we experimentally increased the perceived risk of nest predation prior to egg-laying in seven bird species. Species with prolonged parent-offspring associations increased their intra-brood variation in egg, and subsequently offspring, size. High risk to offspring early in a reproductive cycle can favour a risk-spreading strategy particularly in species with the greatest opportunity to even out offspring quality after fledging.

Mechanisms underlying pituitary microvascular remodelling in thoroughbred horses during the annual reproductive cycle

2014 ◽  
Author(s):  
Angus Yeomans ◽  
Nichol Thompson ◽  
Jennifer Castle-Miller ◽  
David O Bates ◽  
Domingo Tortonese
Keyword(s):  
Reproductive Cycle ◽  
Annual Reproductive Cycle ◽  
Thoroughbred Horses

Seasonal changes of reproductive cycle and proximate compositions in Cerithidea obtusa from Ca Mau mangrove forest, Vietnam

2018 ◽  
Vol 8 (10) ◽  
Author(s):  
Ngo Thi Thu Thao ◽  
Cao My An ◽  
Tran Ngoc Hai ◽  
Kwang-Sik Choi ◽  
Yasuhiko Taki
Keyword(s):  
Reproductive Cycle ◽  
Seasonal Changes ◽  
Mangrove Forest

HISTOLOGICAL CHARACTERS OF OVARIAN CHANGES OF GERRES OYENA DURING THE REPRODUCTIVE CYCLE IN SUEZ BAY, EGYPT

1999 ◽  
Vol 3 (2) ◽  
pp. 115-129
Author(s):  
EL-Boray F. ◽  
EL-Gharabawy M.
Keyword(s):  
Reproductive Cycle

Neural control of cell size in the corpora allata during the reproductive cycle of the cockroachDiploptera punctata(Dictyoptera: Blaberidae)

1998 ◽  
Vol 33 (1) ◽  
pp. 25-34 ◽  
Author(s):  
ANN-SHYN CHIANG ◽  
GLENN L. HOLBROOK ◽  
HAU-WEN CHENG ◽  
COBY SCHAL
Keyword(s):  
Cell Size ◽  
Reproductive Cycle ◽  
Neural Control ◽  
Corpora Allata

Seasonal morphophysiological changes during the reproductive cycle of the tripletail fish Lobotes surinamensis (Perciformes: Lobotidae) in the western South Atlantic

2021 ◽  
Author(s):  
Kainã Rocha Cabrera Fagundes ◽  
Renato Massaaki Honji ◽  
Maria Carmen Escalante-Rojas ◽  
Carlos Eduardo de Oliveira Garcia ◽  
Renata Guimarães Moreira
Keyword(s):  
Reproductive Cycle ◽  
South Atlantic
Sign in / Sign up

Export Citation Format

Share Document