Age, Arrival Date and Reproductive Success of Male American Redstarts Setophaga ruticilla

1996 ◽  
Vol 27 (2) ◽  
pp. 164 ◽  
Author(s):  
G. A. Lozano ◽  
S. Perreault ◽  
R. E. Lemon
Keyword(s):  
Reproductive Success ◽  
Arrival Date ◽  
Setophaga Ruticilla ◽  
American Redstarts

Riverine characteristics and adult demography influence female lake sturgeon (Acipenser fulvescens) spawning behavior, reproductive success, and ovarian quality

2019 ◽  
Vol 76 (7) ◽  
pp. 1147-1160 ◽  
Author(s):  
Kari J. Dammerman ◽  
Molly A.H. Webb ◽  
Kim T. Scribner
Keyword(s):  
Reproductive Success ◽  
Behavioral Plasticity ◽  
Lake Sturgeon ◽  
Operational Sex Ratio ◽  
Plasma Testosterone ◽  
Acipenser Fulvescens ◽  
Reproductive Costs ◽  
Arrival Date ◽  
Factors Influencing ◽  
Yearly Means

Abiotic conditions and demographic factors can influence the timing of spawning. Behavioral plasticity allows females to select spawning conditions that are conducive to offspring development; however, reproductive costs associated with delaying spawning are not well understood. In this study, factors influencing timing of female spawning, residence time (RT), and reproductive success (RS) during two seasons were determined, and plasma testosterone concentrations were used to quantify atretic rates in a wild, lake sturgeon (Acipenser fulvescens) population. For the 123 females monitored, RT ranged from 1 to 23 days and was influenced by arrival date, temperature, discharge, and male number, with the latter having the largest influence. RS varied due to arrival date, temperature, discharge, male number, male length, and operational sex ratio. Two females had testosterone levels indicative of atresia and RS estimates lower than yearly means; however, most females had normal ovaries, suggesting little reproductive costs of plasticity in spawning ground residency time. Results demonstrate the multitude of factors influencing female reproductive behavior and RS, highlighting the importance of abiotic and demographic conditions to recruitment in wild populations.

scholarly journals Non-breeding season events influence sexual selection in a long-distance migratory bird

2009 ◽  
Vol 276 (1662) ◽  
pp. 1619-1626 ◽  
Author(s):  
Matthew W Reudink ◽  
Peter P Marra ◽  
T. Kurt Kyser ◽  
Peter T Boag ◽  
Kathryn M Langin ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Reproductive Success ◽  
Breeding Season ◽  
Poor Quality ◽  
Migratory Bird ◽  
Lower Probability ◽  
Mixed Mating ◽  
Long Distance ◽  
High Quality ◽  
American Redstarts

The study of sexual selection has traditionally focused on events and behaviours immediately surrounding copulation. In this study, we examine whether carry-over effects from the non-breeding season can influence the process of sexual selection in a long-distance migratory bird, the American redstart ( Setophaga ruticilla ). Previous work on American redstarts demonstrated that overwintering in a high-quality habitat influences spring departure dates from the wintering grounds, advances arrival dates on the breeding grounds and increases apparent reproductive success. We show that the mixed-mating strategy of American redstarts compounds the benefits of overwintering in high-quality winter habitats. Males arriving to breed in Canada from high-quality winter habitats arrive earlier than males from poor-quality habitats, resulting in a lower probability of paternity loss, a higher probability of achieving polygyny and ultimately higher realized reproductive success. Such results suggest that the process of sexual selection may be influenced by events interacting throughout the annual cycle.

Dual strategies of song development in American redstarts, Setophaga ruticilla

1994 ◽  
Vol 47 (2) ◽  
pp. 317-329 ◽  
Author(s):  
Robert E. Lemon ◽  
Stephane Perreault ◽  
Daniel M. Weary
Keyword(s):  
Setophaga Ruticilla ◽  
American Redstarts ◽  
Song Development

The effects of adult length and arrival date on individual reproductive success in wild steelhead trout (Oncorhynchus mykiss)

2004 ◽  
Vol 61 (2) ◽  
pp. 193-204 ◽  
Author(s):  
Todd R Seamons ◽  
Paul Bentzen ◽  
Thomas P Quinn
Keyword(s):  
Reproductive Success ◽  
Oncorhynchus Mykiss ◽  
General Trend ◽  
Offspring Size ◽  
Natural Setting ◽  
Adult Size ◽  
Steelhead Trout ◽  
Arrival Date ◽  
Affected Offspring ◽  
Genetically Determined

To determine the relative importance of adult size and arrival date for reproductive success in a natural setting, we first genetically determined relationships between all spawning adult steelhead (Oncorhynchus mykiss) and juvenile offspring in four brood years and then tested hypothesized relationships between parents' phenotypes and the number and size of their juvenile offspring. Patterns of reproductive success varied among years, but in all cases, a few adults of each sex produced most of the offspring. The number of offspring showed a weak, positive relationship to the mother's size but not to her arrival date. Paternal reproductive success varied considerably but was only weakly associated with size in 1998 and weakly related to arrival date in 2000. In 1997, 1998, and 1999, the offspring of early-spawning females were larger at the end of their first and second summers in the stream; however, in 2000, both arrival date and length were positively related to offspring size. There was no general trend in offspring size in relation to paternal size or arrival date; however, paternal length affected offspring size in 1998 and male arrival date affected offspring size in 2000.

Songs of American Redstarts (Setophaga ruticilla): Sequencing Rules and their Relationships to Repertoire Size

Ethology ◽  
2010 ◽  
Vol 93 (3) ◽  
pp. 198-210 ◽  
Author(s):  
Robert E. Lemon ◽  
Charles W. Dobson ◽  
Peter G. Clifton
Keyword(s):  
Repertoire Size ◽  
Setophaga Ruticilla ◽  
American Redstarts
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