Does time of the season influence filial cannibalism in the sand goby, Pomatoschistus minutus?
2007 (English)In: Environmental Biology of Fishes, ISSN 0378-1909, E-ISSN 1573-5133, Vol. 80, no 1, 69-75 p.Article in journal (Refereed) Published
According to life-history theory, filial cannibalism by fish that breed over one season only should be more beneficial early than late in the season if they eat eggs to invest energy into later clutches. Also, filial cannibalism may be more costly late in the season if finding ripe females for replacing eaten eggs is harder then. On the other hand, offspring hatching early may have a competitive advantage over fry hatching late and hence provide higher fitness to the parent. Using data collected over three successive years, I tested if sand goby males are more prone to eat of their eggs early than late in the reproductive season. I found no difference in the amount of eggs eaten or in the frequency of males eating the whole clutch between early and late in the season. Furthermore, there was no difference in the frequency of males who ate parts of their clutches, early compared to late. This might reflect a tradeoff between quality (early hatching offspring) and quantity (producing as many offspring as possible over a long reproductive season). If so, the lack of seasonal pattern of filial cannibalism found in sand gobies might be the result of opposing selection pressures.
Place, publisher, year, edition, pages
Springer , 2007. Vol. 80, no 1, 69-75 p.
Filial cannibalism, Operational sex, ratio, Parental investment, Pomatoschistus miniutus, Reproductive season
IdentifiersURN: urn:nbn:se:su:diva-23058DOI: 10.1007/s10641-006-9117-1ISI: 000249012100007OAI: oai:DiVA.org:su-23058DiVA: diva2:190011
Part of urn:nbn:se:su:diva-13992006-12-062006-12-062011-01-19Bibliographically approved