When does growth rate influence fitness in a colon... - BV FAPESP
Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

When does growth rate influence fitness in a colonial marine invertebrate?

Texto completo
Autor(es):
Burgess, Scott C. [1] ; Bueno, Marilia [2, 1]
Número total de Autores: 2
Afiliação do(s) autor(es):
[1] Florida State Univ, Dept Biol Sci, 319 Stadium Dr, Tallahassee, FL 32306 - USA
[2] Univ Estadual Campinas, UNICAMP, Inst Biol, Dept Biol Anim, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Marine Biology; v. 168, n. 1 JAN 2021.
Citações Web of Science: 0
Resumo

Growth rate affects body size, and larger body sizes are often associated with the capacity to produce more surviving offspring. However, the assumption that growth rate should positively relate to fitness is rarely tested, especially in colonial marine invertebrates where size and age can be decoupled. We measured growth, survival, and reproduction through repeated census of 97 colonies from two populations of a marine bryozoan in the field from settlement to the end of their reproductive season in the northern Gulf of Mexico. Despite large population differences in fitness when grown in a common garden setting, selection within populations on variation in relative growth rate prior to reproduction was similar. In both populations, colonies that grew faster early after settlement, hence were larger, did not consistently have higher fitness than colonies that grew slower after settlement. Instead, early juvenile growth was uncorrelated to later juvenile growth, and colonies that grew faster just prior to the onset of reproduction had higher fitness than colonies that grew slower during this time. Growth rates then declined with the onset of reproduction. Our results show that, rather than being a simple consequence of selection on body size, growth rate can directly affect variation in fitness in ways that are not directly attributable to juvenile size. Colony size and growth rate in modular animals are not always reliable surrogates for direct estimates of survival and reproduction, without identifying when and how growth affects fitness. (AU)

Processo FAPESP: 16/23206-1 - Como a complexidade do habitat afeta a dispersão dos anfípodes: um teste usando gramas marinhas e briozoários
Beneficiário:Marília Bueno Fernandes
Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado