scholarly journals Female reproductive synchrony predicts skewed paternity across primates

2008 ◽  
Vol 19 (6) ◽  
pp. 1150-1158 ◽  
Author(s):  
Julia Ostner ◽  
Charles L. Nunn ◽  
Oliver Schülke
Keyword(s):  
Reproductive Synchrony

Reproductive synchrony in a habitat-forming kelp and its relationship with environmental conditions

2012 ◽  
Vol 160 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Margaret B. Mohring ◽  
Thomas Wernberg ◽  
Gary A. Kendrick ◽  
Michael J. Rule
Keyword(s):  
Environmental Conditions ◽  
Reproductive Synchrony

Dominance rank, female reproductive synchrony, and male reproductive skew in wild Assamese macaques

2014 ◽  
Vol 68 (7) ◽  
pp. 1097-1108 ◽  
Author(s):  
Manakorn Sukmak ◽  
Worawidh Wajjwalku ◽  
Julia Ostner ◽  
Oliver Schülke
Keyword(s):  
Dominance Rank ◽  
Reproductive Skew ◽  
Reproductive Synchrony ◽  
Assamese Macaques

The reproductive biology of Plutonaster Bifrons, Dytaster Insigns and Psilaster Andromeda (Asteroidea: Astropectinidae) from the Rockall Trough

1982 ◽  
Vol 62 (4) ◽  
pp. 869-887
Author(s):  
P. A. Tyler ◽  
S. L. Pain
Keyword(s):  
Reproductive Biology ◽  
Reproductive Strategies ◽  
Egg Size ◽  
Food Source ◽  
Maximum Size ◽  
Reproductive Synchrony ◽  
Sea Bed ◽  
Rockall Trough ◽  
Sperm Development ◽  
Surface Production

Examination of the reproductive biology of three closely related sympatric astropectinid asteroidshas revealed two distinct reproductive strategies. In Plutonaster bifrons and Dytaster insignis the gonads are serially arranged and open at gonopores located at the tip of genital papillae found on the dorsal arm surface between the bases of the paxillae. The ovaries of these species produce numerous small (ca. 120/«n diameter) eggs which in Plutonaster bifrons appear to show a distinct synchrony of production. Initiation of gametogenesis occurs in June to August of each year with oocyte growthcontinuing until March with a spawn-out in the period March to early June. In specimens where spawningdoesnot occur, there would appear to be internal oocyte degeneration, or after spawning relict oocytesundergo phagocytosis. In males initiation of spermatogenesis may occur in August/September of eachyear but after this synchrony of sperm development is not evident. In Psilaster andromeda gonads are located at the base of the arms and each gonad opens at a single gonopore. A number of small (<300 /«n) oocytes are produced by each gonad. Some of these are phagocytosed and some undergo vitellogenesis and grow to a maximum size of 950 fim before being spawned. Unspent oocytes undergo internal degeneration. In neither females nor males is there any evidence of reproductive synchrony. From these egg sizes, fecundities and gametogenic strategies, we infer indirect planktotrophic development for Plutonaster bifrons, the transfer of a seasonal surface production to deep water providing a food source for developing larvae. The egg size and or close to the sea-bed, as there is no evidence of brooding in this species.

scholarly journals Substantial variation in the timing of pollen production reduces reproductive synchrony between distant populations of Pinus sylvestris L. in Scotland

2017 ◽  
Vol 7 (15) ◽  
pp. 5754-5765 ◽  
Author(s):  
Richard Whittet ◽  
Stephen Cavers ◽  
Joan Cottrell ◽  
Cristina Rosique-Esplugas ◽  
Richard Ennos
Keyword(s):  
Pinus Sylvestris ◽  
Pollen Production ◽  
Substantial Variation ◽  
Reproductive Synchrony

scholarly journals High reproductive synchrony of Acropora (Anthozoa: Scleractinia) in the Gulf of Aqaba, Red Sea

F1000Research ◽  
2015 ◽  
Vol 4 ◽  
pp. 2 ◽  
Author(s):  
Jessica Bouwmeester ◽  
Michael L. Berumen
Keyword(s):  
Full Moon ◽  
Gulf Of Aqaba ◽  
Reproductive Condition ◽  
Sampling Protocol ◽  
Reproductive Synchrony ◽  
Synchronous Spawning ◽  
The World ◽  
Coral Spawning ◽  
Spawning Synchrony ◽  
Very High

Coral spawning in the northern Gulf of Aqaba has been reported to be asynchronous, making it almost unique when compared to other regions in the world. Here, we document the reproductive condition of Acropora corals in early June 2014 in Dahab, in the Gulf of Aqaba, 125 km south of previous studies conducted in Eilat, Israel. Seventy-eight percent of Acropora colonies from 14 species had mature eggs, indicating that most colonies will spawn on or around the June full moon, with a very high probability of multi-species synchronous spawning. Given the proximity to Eilat, we predict that a comparable sampling protocol would detect similar levels of reproductive synchrony throughout the Gulf of Aqaba consistent with the hypothesis that high levels of spawning synchrony are a feature of all speciose coral assemblages.

scholarly journals Ampelisca eschrichtii Krøyer, 1842 (Ampeliscidae) of the Sakhalin Shelf in the Okhotsk Sea starve in summer and feast in winter

2018 ◽  
Author(s):  
Valentina B. Durkina ◽  
John W. Chapman ◽  
Natalia L. Demchenko
Keyword(s):  
Gonad Development ◽  
Biomass Concentration ◽  
Okhotsk Sea ◽  
Gray Whales ◽  
Reproductive Synchrony ◽  
Important Prey ◽  
Sakhalin Shelf ◽  
Far Eastern Russia ◽  
Far Eastern ◽  
Growth And Reproduction

Background. Ampelisca eschrichtii Krøyer, 1842 of the Sakhalin Shelf of the Okhotsk Sea, Far Eastern Russia, comprise the highest known biomass concentration of any amphipod population in the world and are a critically important prey source for western gray whales. Growth and reproduction in this population has not been apparent in summer. However, they are not accessible for sampling in winter to test a previous default conclusion that they grow and reproduce in winter. Methods. We tested the default winter growth and reproduction hypothesis by detailed comparisons of the brood and gonad development among 40 females and 14 males and brood sizes among females observed since 2002. Our test included six predictions of reproductive synchrony that would be apparent from gonad and brood morphology if active reproduction occurs in summer. Results. We found high prevalences of undersized and damaged oocytes, undersized broods, a lack of females brooding fully formed juveniles, atrophied ovaries, and males with mature sperm but lacking fully developed secondary sex morphologies required for pelagic mating. All of these conditions are consistent with trophic stress and starvation. Discussion. These A. eschrichtii populations therefore appear to starve in summer and to grow and reproduce in winter. The Offshore A. eschrichtii populations occur in summer below water strata bearing high phytoplankton biomasses. These populations are more likely to feed successfully in winter when storms mix phytoplankton to their depths.

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