Influence Of The Direct And Indirect Effects Of Interspecific Interactions On Life History Evolution In A Trinidadian Killifish (Rivulus Hartii).

Paperback (Print)
Buy New
Buy New from
Used and New from Other Sellers
Used and New from Other Sellers
from $71.99
Usually ships in 1-2 business days
Other sellers (Paperback)
  • All (2) from $71.99   
  • New (2) from $71.99   

More About This Textbook


Predators influence evolutionary change via direct consumption of prey. However, indirect effects of predators and competitors often alter growth rates and food availability, which provide an additional link to evolution. The killifish, Rivulus hartii, are located across a gradient in predation in Trinidad. Rivulus are located in: (1) 'high predation' sites with large piscivores, (2) Rivuluslguppy' sites with guppies, and (3) 'Rivulus-only' sites with just Rivulus. Rivulus suffer higher mortality with predators, and guppies likely prey upon young Rivulu,s in Rivuluslguppy environments. In turn, population densities decline while growth increases in both localities compared to Rivulus-only sites. To explore how these interactions influence evolution in Rivulus, I utilize a multifaceted approach consisting of field and laboratory components. Rivulus phenotypes from high predation sites exhibited a smaller size at maturation and a higher reproductive allotment than Rivulus-only sites. A common garden experiment demonstrated these differences are heritable and such divergence is consistent with theoretical predictions consider predation on adults. To determine if the indirect effects of predators influence evolutionary change, I reared 2nd generation born fish under two food levels that approximated natural differences in resources. This approach demonstrated that the magnitude of trait divergence between high predation and Rivulus-only sites were either reduced or disappeared when Rivulus were fed a ration that approximated growth in a Rivulus-only environment, which indicate that the indirect effects of predators have evolutionary consequences. Rivulus from sites with guppies have evolved earlier maturation and increased reproductive investment compared with Rivulus -only localities. Such divergence is consistent with the predictions from theory that incorporate changes in growth, population density, and resource availability. Moreover, common garden experiments show that these differences were only apparent on a food level typical of Rivulus/guppy environments; the opposite pattern was observed when food was reduced to levels approximating Rivulus-only environments. Such interactions further argue that differences in resource availability dictate evolution in Rivulus. To prove that guppies cause evolution in Rivulus, I evaluated the response to selection after guppies were introduced into two Rivulus-only tributaries. This perturbation caused a similar trajectory of evolution, including analogous food-dependent patterns of trait variation within 25 years.
Read More Show Less

Product Details

  • ISBN-13: 9781244085367
  • Publisher: BiblioLabsII
  • Publication date: 9/11/2011
  • Pages: 184
  • Product dimensions: 7.44 (w) x 9.69 (h) x 0.39 (d)

Customer Reviews

Be the first to write a review
( 0 )
Rating Distribution

5 Star


4 Star


3 Star


2 Star


1 Star


Your Rating:

Your Name: Create a Pen Name or

Barnes & Review Rules

Our reader reviews allow you to share your comments on titles you liked, or didn't, with others. By submitting an online review, you are representing to Barnes & that all information contained in your review is original and accurate in all respects, and that the submission of such content by you and the posting of such content by Barnes & does not and will not violate the rights of any third party. Please follow the rules below to help ensure that your review can be posted.

Reviews by Our Customers Under the Age of 13

We highly value and respect everyone's opinion concerning the titles we offer. However, we cannot allow persons under the age of 13 to have accounts at or to post customer reviews. Please see our Terms of Use for more details.

What to exclude from your review:

Please do not write about reviews, commentary, or information posted on the product page. If you see any errors in the information on the product page, please send us an email.

Reviews should not contain any of the following:

  • - HTML tags, profanity, obscenities, vulgarities, or comments that defame anyone
  • - Time-sensitive information such as tour dates, signings, lectures, etc.
  • - Single-word reviews. Other people will read your review to discover why you liked or didn't like the title. Be descriptive.
  • - Comments focusing on the author or that may ruin the ending for others
  • - Phone numbers, addresses, URLs
  • - Pricing and availability information or alternative ordering information
  • - Advertisements or commercial solicitation


  • - By submitting a review, you grant to Barnes & and its sublicensees the royalty-free, perpetual, irrevocable right and license to use the review in accordance with the Barnes & Terms of Use.
  • - Barnes & reserves the right not to post any review -- particularly those that do not follow the terms and conditions of these Rules. Barnes & also reserves the right to remove any review at any time without notice.
  • - See Terms of Use for other conditions and disclaimers.
Search for Products You'd Like to Recommend

Recommend other products that relate to your review. Just search for them below and share!

Create a Pen Name

Your Pen Name is your unique identity on It will appear on the reviews you write and other website activities. Your Pen Name cannot be edited, changed or deleted once submitted.

Your Pen Name can be any combination of alphanumeric characters (plus - and _), and must be at least two characters long.

Continue Anonymously

    If you find inappropriate content, please report it to Barnes & Noble
    Why is this product inappropriate?
    Comments (optional)